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1343 lines
34 KiB
1343 lines
34 KiB
#include "cache.h" |
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#include "object-store.h" |
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#include "repository.h" |
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#include "object.h" |
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#include "blob.h" |
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#include "tree.h" |
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#include "tree-walk.h" |
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#include "commit.h" |
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#include "tag.h" |
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#include "fsck.h" |
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#include "refs.h" |
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#include "url.h" |
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#include "utf8.h" |
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#include "decorate.h" |
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#include "oidset.h" |
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#include "packfile.h" |
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#include "submodule-config.h" |
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#include "config.h" |
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#include "credential.h" |
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#include "help.h" |
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|
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static struct oidset gitmodules_found = OIDSET_INIT; |
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static struct oidset gitmodules_done = OIDSET_INIT; |
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|
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#define FSCK_FATAL -1 |
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#define FSCK_INFO -2 |
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|
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#define FOREACH_MSG_ID(FUNC) \ |
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/* fatal errors */ \ |
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FUNC(NUL_IN_HEADER, FATAL) \ |
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FUNC(UNTERMINATED_HEADER, FATAL) \ |
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/* errors */ \ |
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FUNC(BAD_DATE, ERROR) \ |
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FUNC(BAD_DATE_OVERFLOW, ERROR) \ |
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FUNC(BAD_EMAIL, ERROR) \ |
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FUNC(BAD_NAME, ERROR) \ |
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FUNC(BAD_OBJECT_SHA1, ERROR) \ |
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FUNC(BAD_PARENT_SHA1, ERROR) \ |
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FUNC(BAD_TAG_OBJECT, ERROR) \ |
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FUNC(BAD_TIMEZONE, ERROR) \ |
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FUNC(BAD_TREE, ERROR) \ |
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FUNC(BAD_TREE_SHA1, ERROR) \ |
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FUNC(BAD_TYPE, ERROR) \ |
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FUNC(DUPLICATE_ENTRIES, ERROR) \ |
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FUNC(MISSING_AUTHOR, ERROR) \ |
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FUNC(MISSING_COMMITTER, ERROR) \ |
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FUNC(MISSING_EMAIL, ERROR) \ |
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FUNC(MISSING_NAME_BEFORE_EMAIL, ERROR) \ |
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FUNC(MISSING_OBJECT, ERROR) \ |
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FUNC(MISSING_SPACE_BEFORE_DATE, ERROR) \ |
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FUNC(MISSING_SPACE_BEFORE_EMAIL, ERROR) \ |
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FUNC(MISSING_TAG, ERROR) \ |
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FUNC(MISSING_TAG_ENTRY, ERROR) \ |
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FUNC(MISSING_TREE, ERROR) \ |
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FUNC(MISSING_TREE_OBJECT, ERROR) \ |
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FUNC(MISSING_TYPE, ERROR) \ |
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FUNC(MISSING_TYPE_ENTRY, ERROR) \ |
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FUNC(MULTIPLE_AUTHORS, ERROR) \ |
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FUNC(TREE_NOT_SORTED, ERROR) \ |
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FUNC(UNKNOWN_TYPE, ERROR) \ |
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FUNC(ZERO_PADDED_DATE, ERROR) \ |
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FUNC(GITMODULES_MISSING, ERROR) \ |
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FUNC(GITMODULES_BLOB, ERROR) \ |
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FUNC(GITMODULES_LARGE, ERROR) \ |
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FUNC(GITMODULES_NAME, ERROR) \ |
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FUNC(GITMODULES_SYMLINK, ERROR) \ |
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FUNC(GITMODULES_URL, ERROR) \ |
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FUNC(GITMODULES_PATH, ERROR) \ |
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FUNC(GITMODULES_UPDATE, ERROR) \ |
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/* warnings */ \ |
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FUNC(BAD_FILEMODE, WARN) \ |
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FUNC(EMPTY_NAME, WARN) \ |
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FUNC(FULL_PATHNAME, WARN) \ |
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FUNC(HAS_DOT, WARN) \ |
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FUNC(HAS_DOTDOT, WARN) \ |
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FUNC(HAS_DOTGIT, WARN) \ |
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FUNC(NULL_SHA1, WARN) \ |
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FUNC(ZERO_PADDED_FILEMODE, WARN) \ |
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FUNC(NUL_IN_COMMIT, WARN) \ |
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/* infos (reported as warnings, but ignored by default) */ \ |
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FUNC(GITMODULES_PARSE, INFO) \ |
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FUNC(BAD_TAG_NAME, INFO) \ |
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FUNC(MISSING_TAGGER_ENTRY, INFO) \ |
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/* ignored (elevated when requested) */ \ |
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FUNC(EXTRA_HEADER_ENTRY, IGNORE) |
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|
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#define MSG_ID(id, msg_type) FSCK_MSG_##id, |
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enum fsck_msg_id { |
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FOREACH_MSG_ID(MSG_ID) |
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FSCK_MSG_MAX |
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}; |
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#undef MSG_ID |
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|
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#define STR(x) #x |
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#define MSG_ID(id, msg_type) { STR(id), NULL, NULL, FSCK_##msg_type }, |
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static struct { |
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const char *id_string; |
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const char *downcased; |
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const char *camelcased; |
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int msg_type; |
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} msg_id_info[FSCK_MSG_MAX + 1] = { |
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FOREACH_MSG_ID(MSG_ID) |
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{ NULL, NULL, NULL, -1 } |
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}; |
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#undef MSG_ID |
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|
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static void prepare_msg_ids(void) |
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{ |
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int i; |
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|
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if (msg_id_info[0].downcased) |
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return; |
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|
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/* convert id_string to lower case, without underscores. */ |
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for (i = 0; i < FSCK_MSG_MAX; i++) { |
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const char *p = msg_id_info[i].id_string; |
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int len = strlen(p); |
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char *q = xmalloc(len); |
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|
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msg_id_info[i].downcased = q; |
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while (*p) |
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if (*p == '_') |
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p++; |
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else |
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*(q)++ = tolower(*(p)++); |
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*q = '\0'; |
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|
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p = msg_id_info[i].id_string; |
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q = xmalloc(len); |
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msg_id_info[i].camelcased = q; |
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while (*p) { |
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if (*p == '_') { |
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p++; |
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if (*p) |
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*q++ = *p++; |
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} else { |
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*q++ = tolower(*p++); |
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} |
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} |
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*q = '\0'; |
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} |
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} |
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|
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static int parse_msg_id(const char *text) |
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{ |
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int i; |
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|
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prepare_msg_ids(); |
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|
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for (i = 0; i < FSCK_MSG_MAX; i++) |
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if (!strcmp(text, msg_id_info[i].downcased)) |
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return i; |
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|
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return -1; |
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} |
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|
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void list_config_fsck_msg_ids(struct string_list *list, const char *prefix) |
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{ |
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int i; |
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|
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prepare_msg_ids(); |
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|
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for (i = 0; i < FSCK_MSG_MAX; i++) |
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list_config_item(list, prefix, msg_id_info[i].camelcased); |
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} |
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static int fsck_msg_type(enum fsck_msg_id msg_id, |
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struct fsck_options *options) |
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{ |
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int msg_type; |
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|
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assert(msg_id >= 0 && msg_id < FSCK_MSG_MAX); |
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|
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if (options->msg_type) |
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msg_type = options->msg_type[msg_id]; |
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else { |
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msg_type = msg_id_info[msg_id].msg_type; |
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if (options->strict && msg_type == FSCK_WARN) |
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msg_type = FSCK_ERROR; |
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} |
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|
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return msg_type; |
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} |
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|
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static int parse_msg_type(const char *str) |
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{ |
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if (!strcmp(str, "error")) |
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return FSCK_ERROR; |
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else if (!strcmp(str, "warn")) |
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return FSCK_WARN; |
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else if (!strcmp(str, "ignore")) |
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return FSCK_IGNORE; |
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else |
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die("Unknown fsck message type: '%s'", str); |
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} |
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|
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int is_valid_msg_type(const char *msg_id, const char *msg_type) |
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{ |
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if (parse_msg_id(msg_id) < 0) |
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return 0; |
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parse_msg_type(msg_type); |
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return 1; |
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} |
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|
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void fsck_set_msg_type(struct fsck_options *options, |
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const char *msg_id, const char *msg_type) |
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{ |
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int id = parse_msg_id(msg_id), type; |
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|
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if (id < 0) |
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die("Unhandled message id: %s", msg_id); |
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type = parse_msg_type(msg_type); |
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|
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if (type != FSCK_ERROR && msg_id_info[id].msg_type == FSCK_FATAL) |
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die("Cannot demote %s to %s", msg_id, msg_type); |
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|
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if (!options->msg_type) { |
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int i; |
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int *msg_type; |
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ALLOC_ARRAY(msg_type, FSCK_MSG_MAX); |
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for (i = 0; i < FSCK_MSG_MAX; i++) |
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msg_type[i] = fsck_msg_type(i, options); |
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options->msg_type = msg_type; |
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} |
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|
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options->msg_type[id] = type; |
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} |
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|
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void fsck_set_msg_types(struct fsck_options *options, const char *values) |
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{ |
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char *buf = xstrdup(values), *to_free = buf; |
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int done = 0; |
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|
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while (!done) { |
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int len = strcspn(buf, " ,|"), equal; |
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|
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done = !buf[len]; |
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if (!len) { |
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buf++; |
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continue; |
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} |
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buf[len] = '\0'; |
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|
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for (equal = 0; |
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equal < len && buf[equal] != '=' && buf[equal] != ':'; |
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equal++) |
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buf[equal] = tolower(buf[equal]); |
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buf[equal] = '\0'; |
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|
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if (!strcmp(buf, "skiplist")) { |
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if (equal == len) |
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die("skiplist requires a path"); |
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oidset_parse_file(&options->skiplist, buf + equal + 1); |
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buf += len + 1; |
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continue; |
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} |
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|
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if (equal == len) |
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die("Missing '=': '%s'", buf); |
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fsck_set_msg_type(options, buf, buf + equal + 1); |
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buf += len + 1; |
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} |
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free(to_free); |
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} |
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|
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static void append_msg_id(struct strbuf *sb, const char *msg_id) |
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{ |
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for (;;) { |
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char c = *(msg_id)++; |
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|
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if (!c) |
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break; |
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if (c != '_') |
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strbuf_addch(sb, tolower(c)); |
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else { |
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assert(*msg_id); |
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strbuf_addch(sb, *(msg_id)++); |
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} |
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} |
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|
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strbuf_addstr(sb, ": "); |
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} |
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static int object_on_skiplist(struct fsck_options *opts, |
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const struct object_id *oid) |
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{ |
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return opts && oid && oidset_contains(&opts->skiplist, oid); |
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} |
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|
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__attribute__((format (printf, 5, 6))) |
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static int report(struct fsck_options *options, |
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const struct object_id *oid, enum object_type object_type, |
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enum fsck_msg_id id, const char *fmt, ...) |
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{ |
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va_list ap; |
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struct strbuf sb = STRBUF_INIT; |
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int msg_type = fsck_msg_type(id, options), result; |
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|
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if (msg_type == FSCK_IGNORE) |
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return 0; |
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|
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if (object_on_skiplist(options, oid)) |
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return 0; |
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if (msg_type == FSCK_FATAL) |
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msg_type = FSCK_ERROR; |
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else if (msg_type == FSCK_INFO) |
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msg_type = FSCK_WARN; |
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|
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append_msg_id(&sb, msg_id_info[id].id_string); |
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|
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va_start(ap, fmt); |
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strbuf_vaddf(&sb, fmt, ap); |
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result = options->error_func(options, oid, object_type, |
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msg_type, sb.buf); |
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strbuf_release(&sb); |
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va_end(ap); |
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return result; |
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} |
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void fsck_enable_object_names(struct fsck_options *options) |
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{ |
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if (!options->object_names) |
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options->object_names = kh_init_oid_map(); |
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} |
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const char *fsck_get_object_name(struct fsck_options *options, |
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const struct object_id *oid) |
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{ |
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khiter_t pos; |
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if (!options->object_names) |
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return NULL; |
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pos = kh_get_oid_map(options->object_names, *oid); |
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if (pos >= kh_end(options->object_names)) |
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return NULL; |
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return kh_value(options->object_names, pos); |
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} |
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|
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void fsck_put_object_name(struct fsck_options *options, |
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const struct object_id *oid, |
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const char *fmt, ...) |
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{ |
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va_list ap; |
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struct strbuf buf = STRBUF_INIT; |
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khiter_t pos; |
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int hashret; |
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|
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if (!options->object_names) |
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return; |
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|
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pos = kh_put_oid_map(options->object_names, *oid, &hashret); |
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if (!hashret) |
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return; |
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va_start(ap, fmt); |
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strbuf_vaddf(&buf, fmt, ap); |
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kh_value(options->object_names, pos) = strbuf_detach(&buf, NULL); |
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va_end(ap); |
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} |
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|
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const char *fsck_describe_object(struct fsck_options *options, |
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const struct object_id *oid) |
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{ |
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static struct strbuf bufs[] = { |
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STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT |
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}; |
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static int b = 0; |
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struct strbuf *buf; |
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const char *name = fsck_get_object_name(options, oid); |
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|
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buf = bufs + b; |
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b = (b + 1) % ARRAY_SIZE(bufs); |
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strbuf_reset(buf); |
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strbuf_addstr(buf, oid_to_hex(oid)); |
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if (name) |
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strbuf_addf(buf, " (%s)", name); |
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|
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return buf->buf; |
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} |
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|
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static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *options) |
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{ |
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struct tree_desc desc; |
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struct name_entry entry; |
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int res = 0; |
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const char *name; |
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|
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if (parse_tree(tree)) |
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return -1; |
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|
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name = fsck_get_object_name(options, &tree->object.oid); |
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if (init_tree_desc_gently(&desc, tree->buffer, tree->size)) |
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return -1; |
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while (tree_entry_gently(&desc, &entry)) { |
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struct object *obj; |
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int result; |
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|
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if (S_ISGITLINK(entry.mode)) |
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continue; |
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|
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if (S_ISDIR(entry.mode)) { |
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obj = (struct object *)lookup_tree(the_repository, &entry.oid); |
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if (name && obj) |
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fsck_put_object_name(options, &entry.oid, "%s%s/", |
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name, entry.path); |
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result = options->walk(obj, OBJ_TREE, data, options); |
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} |
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else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode)) { |
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obj = (struct object *)lookup_blob(the_repository, &entry.oid); |
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if (name && obj) |
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fsck_put_object_name(options, &entry.oid, "%s%s", |
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name, entry.path); |
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result = options->walk(obj, OBJ_BLOB, data, options); |
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} |
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else { |
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result = error("in tree %s: entry %s has bad mode %.6o", |
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fsck_describe_object(options, &tree->object.oid), |
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entry.path, entry.mode); |
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} |
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if (result < 0) |
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return result; |
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if (!res) |
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res = result; |
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} |
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return res; |
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} |
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|
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static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_options *options) |
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{ |
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int counter = 0, generation = 0, name_prefix_len = 0; |
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struct commit_list *parents; |
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int res; |
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int result; |
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const char *name; |
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|
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if (parse_commit(commit)) |
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return -1; |
|
|
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name = fsck_get_object_name(options, &commit->object.oid); |
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if (name) |
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fsck_put_object_name(options, get_commit_tree_oid(commit), |
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"%s:", name); |
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|
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result = options->walk((struct object *)get_commit_tree(commit), |
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OBJ_TREE, data, options); |
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if (result < 0) |
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return result; |
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res = result; |
|
|
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parents = commit->parents; |
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if (name && parents) { |
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int len = strlen(name), power; |
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|
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if (len && name[len - 1] == '^') { |
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generation = 1; |
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name_prefix_len = len - 1; |
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} |
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else { /* parse ~<generation> suffix */ |
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for (generation = 0, power = 1; |
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len && isdigit(name[len - 1]); |
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power *= 10) |
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generation += power * (name[--len] - '0'); |
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if (power > 1 && len && name[len - 1] == '~') |
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name_prefix_len = len - 1; |
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else { |
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/* Maybe a non-first parent, e.g. HEAD^2 */ |
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generation = 0; |
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name_prefix_len = len; |
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} |
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} |
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} |
|
|
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while (parents) { |
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if (name) { |
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struct object_id *oid = &parents->item->object.oid; |
|
|
|
if (counter++) |
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fsck_put_object_name(options, oid, "%s^%d", |
|
name, counter); |
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else if (generation > 0) |
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fsck_put_object_name(options, oid, "%.*s~%d", |
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name_prefix_len, name, |
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generation + 1); |
|
else |
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fsck_put_object_name(options, oid, "%s^", name); |
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} |
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result = options->walk((struct object *)parents->item, OBJ_COMMIT, data, options); |
|
if (result < 0) |
|
return result; |
|
if (!res) |
|
res = result; |
|
parents = parents->next; |
|
} |
|
return res; |
|
} |
|
|
|
static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *options) |
|
{ |
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const char *name = fsck_get_object_name(options, &tag->object.oid); |
|
|
|
if (parse_tag(tag)) |
|
return -1; |
|
if (name) |
|
fsck_put_object_name(options, &tag->tagged->oid, "%s", name); |
|
return options->walk(tag->tagged, OBJ_ANY, data, options); |
|
} |
|
|
|
int fsck_walk(struct object *obj, void *data, struct fsck_options *options) |
|
{ |
|
if (!obj) |
|
return -1; |
|
|
|
if (obj->type == OBJ_NONE) |
|
parse_object(the_repository, &obj->oid); |
|
|
|
switch (obj->type) { |
|
case OBJ_BLOB: |
|
return 0; |
|
case OBJ_TREE: |
|
return fsck_walk_tree((struct tree *)obj, data, options); |
|
case OBJ_COMMIT: |
|
return fsck_walk_commit((struct commit *)obj, data, options); |
|
case OBJ_TAG: |
|
return fsck_walk_tag((struct tag *)obj, data, options); |
|
default: |
|
error("Unknown object type for %s", |
|
fsck_describe_object(options, &obj->oid)); |
|
return -1; |
|
} |
|
} |
|
|
|
struct name_stack { |
|
const char **names; |
|
size_t nr, alloc; |
|
}; |
|
|
|
static void name_stack_push(struct name_stack *stack, const char *name) |
|
{ |
|
ALLOC_GROW(stack->names, stack->nr + 1, stack->alloc); |
|
stack->names[stack->nr++] = name; |
|
} |
|
|
|
static const char *name_stack_pop(struct name_stack *stack) |
|
{ |
|
return stack->nr ? stack->names[--stack->nr] : NULL; |
|
} |
|
|
|
static void name_stack_clear(struct name_stack *stack) |
|
{ |
|
FREE_AND_NULL(stack->names); |
|
stack->nr = stack->alloc = 0; |
|
} |
|
|
|
/* |
|
* The entries in a tree are ordered in the _path_ order, |
|
* which means that a directory entry is ordered by adding |
|
* a slash to the end of it. |
|
* |
|
* So a directory called "a" is ordered _after_ a file |
|
* called "a.c", because "a/" sorts after "a.c". |
|
*/ |
|
#define TREE_UNORDERED (-1) |
|
#define TREE_HAS_DUPS (-2) |
|
|
|
static int is_less_than_slash(unsigned char c) |
|
{ |
|
return '\0' < c && c < '/'; |
|
} |
|
|
|
static int verify_ordered(unsigned mode1, const char *name1, |
|
unsigned mode2, const char *name2, |
|
struct name_stack *candidates) |
|
{ |
|
int len1 = strlen(name1); |
|
int len2 = strlen(name2); |
|
int len = len1 < len2 ? len1 : len2; |
|
unsigned char c1, c2; |
|
int cmp; |
|
|
|
cmp = memcmp(name1, name2, len); |
|
if (cmp < 0) |
|
return 0; |
|
if (cmp > 0) |
|
return TREE_UNORDERED; |
|
|
|
/* |
|
* Ok, the first <len> characters are the same. |
|
* Now we need to order the next one, but turn |
|
* a '\0' into a '/' for a directory entry. |
|
*/ |
|
c1 = name1[len]; |
|
c2 = name2[len]; |
|
if (!c1 && !c2) |
|
/* |
|
* git-write-tree used to write out a nonsense tree that has |
|
* entries with the same name, one blob and one tree. Make |
|
* sure we do not have duplicate entries. |
|
*/ |
|
return TREE_HAS_DUPS; |
|
if (!c1 && S_ISDIR(mode1)) |
|
c1 = '/'; |
|
if (!c2 && S_ISDIR(mode2)) |
|
c2 = '/'; |
|
|
|
/* |
|
* There can be non-consecutive duplicates due to the implicitly |
|
* added slash, e.g.: |
|
* |
|
* foo |
|
* foo.bar |
|
* foo.bar.baz |
|
* foo.bar/ |
|
* foo/ |
|
* |
|
* Record non-directory candidates (like "foo" and "foo.bar" in |
|
* the example) on a stack and check directory candidates (like |
|
* foo/" and "foo.bar/") against that stack. |
|
*/ |
|
if (!c1 && is_less_than_slash(c2)) { |
|
name_stack_push(candidates, name1); |
|
} else if (c2 == '/' && is_less_than_slash(c1)) { |
|
for (;;) { |
|
const char *p; |
|
const char *f_name = name_stack_pop(candidates); |
|
|
|
if (!f_name) |
|
break; |
|
if (!skip_prefix(name2, f_name, &p)) |
|
continue; |
|
if (!*p) |
|
return TREE_HAS_DUPS; |
|
if (is_less_than_slash(*p)) { |
|
name_stack_push(candidates, f_name); |
|
break; |
|
} |
|
} |
|
} |
|
|
|
return c1 < c2 ? 0 : TREE_UNORDERED; |
|
} |
|
|
|
static int fsck_tree(const struct object_id *oid, |
|
const char *buffer, unsigned long size, |
|
struct fsck_options *options) |
|
{ |
|
int retval = 0; |
|
int has_null_sha1 = 0; |
|
int has_full_path = 0; |
|
int has_empty_name = 0; |
|
int has_dot = 0; |
|
int has_dotdot = 0; |
|
int has_dotgit = 0; |
|
int has_zero_pad = 0; |
|
int has_bad_modes = 0; |
|
int has_dup_entries = 0; |
|
int not_properly_sorted = 0; |
|
struct tree_desc desc; |
|
unsigned o_mode; |
|
const char *o_name; |
|
struct name_stack df_dup_candidates = { NULL }; |
|
|
|
if (init_tree_desc_gently(&desc, buffer, size)) { |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree"); |
|
return retval; |
|
} |
|
|
|
o_mode = 0; |
|
o_name = NULL; |
|
|
|
while (desc.size) { |
|
unsigned short mode; |
|
const char *name, *backslash; |
|
const struct object_id *oid; |
|
|
|
oid = tree_entry_extract(&desc, &name, &mode); |
|
|
|
has_null_sha1 |= is_null_oid(oid); |
|
has_full_path |= !!strchr(name, '/'); |
|
has_empty_name |= !*name; |
|
has_dot |= !strcmp(name, "."); |
|
has_dotdot |= !strcmp(name, ".."); |
|
has_dotgit |= is_hfs_dotgit(name) || is_ntfs_dotgit(name); |
|
has_zero_pad |= *(char *)desc.buffer == '0'; |
|
|
|
if (is_hfs_dotgitmodules(name) || is_ntfs_dotgitmodules(name)) { |
|
if (!S_ISLNK(mode)) |
|
oidset_insert(&gitmodules_found, oid); |
|
else |
|
retval += report(options, |
|
oid, OBJ_TREE, |
|
FSCK_MSG_GITMODULES_SYMLINK, |
|
".gitmodules is a symbolic link"); |
|
} |
|
|
|
if ((backslash = strchr(name, '\\'))) { |
|
while (backslash) { |
|
backslash++; |
|
has_dotgit |= is_ntfs_dotgit(backslash); |
|
if (is_ntfs_dotgitmodules(backslash)) { |
|
if (!S_ISLNK(mode)) |
|
oidset_insert(&gitmodules_found, oid); |
|
else |
|
retval += report(options, oid, OBJ_TREE, |
|
FSCK_MSG_GITMODULES_SYMLINK, |
|
".gitmodules is a symbolic link"); |
|
} |
|
backslash = strchr(backslash, '\\'); |
|
} |
|
} |
|
|
|
if (update_tree_entry_gently(&desc)) { |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree"); |
|
break; |
|
} |
|
|
|
switch (mode) { |
|
/* |
|
* Standard modes.. |
|
*/ |
|
case S_IFREG | 0755: |
|
case S_IFREG | 0644: |
|
case S_IFLNK: |
|
case S_IFDIR: |
|
case S_IFGITLINK: |
|
break; |
|
/* |
|
* This is nonstandard, but we had a few of these |
|
* early on when we honored the full set of mode |
|
* bits.. |
|
*/ |
|
case S_IFREG | 0664: |
|
if (!options->strict) |
|
break; |
|
/* fallthrough */ |
|
default: |
|
has_bad_modes = 1; |
|
} |
|
|
|
if (o_name) { |
|
switch (verify_ordered(o_mode, o_name, mode, name, |
|
&df_dup_candidates)) { |
|
case TREE_UNORDERED: |
|
not_properly_sorted = 1; |
|
break; |
|
case TREE_HAS_DUPS: |
|
has_dup_entries = 1; |
|
break; |
|
default: |
|
break; |
|
} |
|
} |
|
|
|
o_mode = mode; |
|
o_name = name; |
|
} |
|
|
|
name_stack_clear(&df_dup_candidates); |
|
|
|
if (has_null_sha1) |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_NULL_SHA1, "contains entries pointing to null sha1"); |
|
if (has_full_path) |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_FULL_PATHNAME, "contains full pathnames"); |
|
if (has_empty_name) |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_EMPTY_NAME, "contains empty pathname"); |
|
if (has_dot) |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_HAS_DOT, "contains '.'"); |
|
if (has_dotdot) |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_HAS_DOTDOT, "contains '..'"); |
|
if (has_dotgit) |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_HAS_DOTGIT, "contains '.git'"); |
|
if (has_zero_pad) |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_ZERO_PADDED_FILEMODE, "contains zero-padded file modes"); |
|
if (has_bad_modes) |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_BAD_FILEMODE, "contains bad file modes"); |
|
if (has_dup_entries) |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_DUPLICATE_ENTRIES, "contains duplicate file entries"); |
|
if (not_properly_sorted) |
|
retval += report(options, oid, OBJ_TREE, FSCK_MSG_TREE_NOT_SORTED, "not properly sorted"); |
|
return retval; |
|
} |
|
|
|
static int verify_headers(const void *data, unsigned long size, |
|
const struct object_id *oid, enum object_type type, |
|
struct fsck_options *options) |
|
{ |
|
const char *buffer = (const char *)data; |
|
unsigned long i; |
|
|
|
for (i = 0; i < size; i++) { |
|
switch (buffer[i]) { |
|
case '\0': |
|
return report(options, oid, type, |
|
FSCK_MSG_NUL_IN_HEADER, |
|
"unterminated header: NUL at offset %ld", i); |
|
case '\n': |
|
if (i + 1 < size && buffer[i + 1] == '\n') |
|
return 0; |
|
} |
|
} |
|
|
|
/* |
|
* We did not find double-LF that separates the header |
|
* and the body. Not having a body is not a crime but |
|
* we do want to see the terminating LF for the last header |
|
* line. |
|
*/ |
|
if (size && buffer[size - 1] == '\n') |
|
return 0; |
|
|
|
return report(options, oid, type, |
|
FSCK_MSG_UNTERMINATED_HEADER, "unterminated header"); |
|
} |
|
|
|
static int fsck_ident(const char **ident, |
|
const struct object_id *oid, enum object_type type, |
|
struct fsck_options *options) |
|
{ |
|
const char *p = *ident; |
|
char *end; |
|
|
|
*ident = strchrnul(*ident, '\n'); |
|
if (**ident == '\n') |
|
(*ident)++; |
|
|
|
if (*p == '<') |
|
return report(options, oid, type, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); |
|
p += strcspn(p, "<>\n"); |
|
if (*p == '>') |
|
return report(options, oid, type, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name"); |
|
if (*p != '<') |
|
return report(options, oid, type, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email"); |
|
if (p[-1] != ' ') |
|
return report(options, oid, type, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); |
|
p++; |
|
p += strcspn(p, "<>\n"); |
|
if (*p != '>') |
|
return report(options, oid, type, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email"); |
|
p++; |
|
if (*p != ' ') |
|
return report(options, oid, type, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date"); |
|
p++; |
|
if (*p == '0' && p[1] != ' ') |
|
return report(options, oid, type, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date"); |
|
if (date_overflows(parse_timestamp(p, &end, 10))) |
|
return report(options, oid, type, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow"); |
|
if ((end == p || *end != ' ')) |
|
return report(options, oid, type, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date"); |
|
p = end + 1; |
|
if ((*p != '+' && *p != '-') || |
|
!isdigit(p[1]) || |
|
!isdigit(p[2]) || |
|
!isdigit(p[3]) || |
|
!isdigit(p[4]) || |
|
(p[5] != '\n')) |
|
return report(options, oid, type, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone"); |
|
p += 6; |
|
return 0; |
|
} |
|
|
|
static int fsck_commit(const struct object_id *oid, |
|
const char *buffer, unsigned long size, |
|
struct fsck_options *options) |
|
{ |
|
struct object_id tree_oid, parent_oid; |
|
unsigned author_count; |
|
int err; |
|
const char *buffer_begin = buffer; |
|
const char *p; |
|
|
|
if (verify_headers(buffer, size, oid, OBJ_COMMIT, options)) |
|
return -1; |
|
|
|
if (!skip_prefix(buffer, "tree ", &buffer)) |
|
return report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_TREE, "invalid format - expected 'tree' line"); |
|
if (parse_oid_hex(buffer, &tree_oid, &p) || *p != '\n') { |
|
err = report(options, oid, OBJ_COMMIT, FSCK_MSG_BAD_TREE_SHA1, "invalid 'tree' line format - bad sha1"); |
|
if (err) |
|
return err; |
|
} |
|
buffer = p + 1; |
|
while (skip_prefix(buffer, "parent ", &buffer)) { |
|
if (parse_oid_hex(buffer, &parent_oid, &p) || *p != '\n') { |
|
err = report(options, oid, OBJ_COMMIT, FSCK_MSG_BAD_PARENT_SHA1, "invalid 'parent' line format - bad sha1"); |
|
if (err) |
|
return err; |
|
} |
|
buffer = p + 1; |
|
} |
|
author_count = 0; |
|
while (skip_prefix(buffer, "author ", &buffer)) { |
|
author_count++; |
|
err = fsck_ident(&buffer, oid, OBJ_COMMIT, options); |
|
if (err) |
|
return err; |
|
} |
|
if (author_count < 1) |
|
err = report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_AUTHOR, "invalid format - expected 'author' line"); |
|
else if (author_count > 1) |
|
err = report(options, oid, OBJ_COMMIT, FSCK_MSG_MULTIPLE_AUTHORS, "invalid format - multiple 'author' lines"); |
|
if (err) |
|
return err; |
|
if (!skip_prefix(buffer, "committer ", &buffer)) |
|
return report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_COMMITTER, "invalid format - expected 'committer' line"); |
|
err = fsck_ident(&buffer, oid, OBJ_COMMIT, options); |
|
if (err) |
|
return err; |
|
if (memchr(buffer_begin, '\0', size)) { |
|
err = report(options, oid, OBJ_COMMIT, FSCK_MSG_NUL_IN_COMMIT, |
|
"NUL byte in the commit object body"); |
|
if (err) |
|
return err; |
|
} |
|
return 0; |
|
} |
|
|
|
static int fsck_tag(const struct object_id *oid, const char *buffer, |
|
unsigned long size, struct fsck_options *options) |
|
{ |
|
struct object_id tagged_oid; |
|
int tagged_type; |
|
return fsck_tag_standalone(oid, buffer, size, options, &tagged_oid, |
|
&tagged_type); |
|
} |
|
|
|
int fsck_tag_standalone(const struct object_id *oid, const char *buffer, |
|
unsigned long size, struct fsck_options *options, |
|
struct object_id *tagged_oid, |
|
int *tagged_type) |
|
{ |
|
int ret = 0; |
|
char *eol; |
|
struct strbuf sb = STRBUF_INIT; |
|
const char *p; |
|
|
|
ret = verify_headers(buffer, size, oid, OBJ_TAG, options); |
|
if (ret) |
|
goto done; |
|
|
|
if (!skip_prefix(buffer, "object ", &buffer)) { |
|
ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_OBJECT, "invalid format - expected 'object' line"); |
|
goto done; |
|
} |
|
if (parse_oid_hex(buffer, tagged_oid, &p) || *p != '\n') { |
|
ret = report(options, oid, OBJ_TAG, FSCK_MSG_BAD_OBJECT_SHA1, "invalid 'object' line format - bad sha1"); |
|
if (ret) |
|
goto done; |
|
} |
|
buffer = p + 1; |
|
|
|
if (!skip_prefix(buffer, "type ", &buffer)) { |
|
ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TYPE_ENTRY, "invalid format - expected 'type' line"); |
|
goto done; |
|
} |
|
eol = strchr(buffer, '\n'); |
|
if (!eol) { |
|
ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TYPE, "invalid format - unexpected end after 'type' line"); |
|
goto done; |
|
} |
|
*tagged_type = type_from_string_gently(buffer, eol - buffer, 1); |
|
if (*tagged_type < 0) |
|
ret = report(options, oid, OBJ_TAG, FSCK_MSG_BAD_TYPE, "invalid 'type' value"); |
|
if (ret) |
|
goto done; |
|
buffer = eol + 1; |
|
|
|
if (!skip_prefix(buffer, "tag ", &buffer)) { |
|
ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAG_ENTRY, "invalid format - expected 'tag' line"); |
|
goto done; |
|
} |
|
eol = strchr(buffer, '\n'); |
|
if (!eol) { |
|
ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAG, "invalid format - unexpected end after 'type' line"); |
|
goto done; |
|
} |
|
strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer); |
|
if (check_refname_format(sb.buf, 0)) { |
|
ret = report(options, oid, OBJ_TAG, |
|
FSCK_MSG_BAD_TAG_NAME, |
|
"invalid 'tag' name: %.*s", |
|
(int)(eol - buffer), buffer); |
|
if (ret) |
|
goto done; |
|
} |
|
buffer = eol + 1; |
|
|
|
if (!skip_prefix(buffer, "tagger ", &buffer)) { |
|
/* early tags do not contain 'tagger' lines; warn only */ |
|
ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAGGER_ENTRY, "invalid format - expected 'tagger' line"); |
|
if (ret) |
|
goto done; |
|
} |
|
else |
|
ret = fsck_ident(&buffer, oid, OBJ_TAG, options); |
|
if (!*buffer) |
|
goto done; |
|
|
|
if (!starts_with(buffer, "\n")) { |
|
/* |
|
* The verify_headers() check will allow |
|
* e.g. "[...]tagger <tagger>\nsome |
|
* garbage\n\nmessage" to pass, thinking "some |
|
* garbage" could be a custom header. E.g. "mktag" |
|
* doesn't want any unknown headers. |
|
*/ |
|
ret = report(options, oid, OBJ_TAG, FSCK_MSG_EXTRA_HEADER_ENTRY, "invalid format - extra header(s) after 'tagger'"); |
|
if (ret) |
|
goto done; |
|
} |
|
|
|
done: |
|
strbuf_release(&sb); |
|
return ret; |
|
} |
|
|
|
/* |
|
* Like builtin/submodule--helper.c's starts_with_dot_slash, but without |
|
* relying on the platform-dependent is_dir_sep helper. |
|
* |
|
* This is for use in checking whether a submodule URL is interpreted as |
|
* relative to the current directory on any platform, since \ is a |
|
* directory separator on Windows but not on other platforms. |
|
*/ |
|
static int starts_with_dot_slash(const char *str) |
|
{ |
|
return str[0] == '.' && (str[1] == '/' || str[1] == '\\'); |
|
} |
|
|
|
/* |
|
* Like starts_with_dot_slash, this is a variant of submodule--helper's |
|
* helper of the same name with the twist that it accepts backslash as a |
|
* directory separator even on non-Windows platforms. |
|
*/ |
|
static int starts_with_dot_dot_slash(const char *str) |
|
{ |
|
return str[0] == '.' && starts_with_dot_slash(str + 1); |
|
} |
|
|
|
static int submodule_url_is_relative(const char *url) |
|
{ |
|
return starts_with_dot_slash(url) || starts_with_dot_dot_slash(url); |
|
} |
|
|
|
/* |
|
* Count directory components that a relative submodule URL should chop |
|
* from the remote_url it is to be resolved against. |
|
* |
|
* In other words, this counts "../" components at the start of a |
|
* submodule URL. |
|
* |
|
* Returns the number of directory components to chop and writes a |
|
* pointer to the next character of url after all leading "./" and |
|
* "../" components to out. |
|
*/ |
|
static int count_leading_dotdots(const char *url, const char **out) |
|
{ |
|
int result = 0; |
|
while (1) { |
|
if (starts_with_dot_dot_slash(url)) { |
|
result++; |
|
url += strlen("../"); |
|
continue; |
|
} |
|
if (starts_with_dot_slash(url)) { |
|
url += strlen("./"); |
|
continue; |
|
} |
|
*out = url; |
|
return result; |
|
} |
|
} |
|
/* |
|
* Check whether a transport is implemented by git-remote-curl. |
|
* |
|
* If it is, returns 1 and writes the URL that would be passed to |
|
* git-remote-curl to the "out" parameter. |
|
* |
|
* Otherwise, returns 0 and leaves "out" untouched. |
|
* |
|
* Examples: |
|
* http::https://example.com/repo.git -> 1, https://example.com/repo.git |
|
* https://example.com/repo.git -> 1, https://example.com/repo.git |
|
* git://example.com/repo.git -> 0 |
|
* |
|
* This is for use in checking for previously exploitable bugs that |
|
* required a submodule URL to be passed to git-remote-curl. |
|
*/ |
|
static int url_to_curl_url(const char *url, const char **out) |
|
{ |
|
/* |
|
* We don't need to check for case-aliases, "http.exe", and so |
|
* on because in the default configuration, is_transport_allowed |
|
* prevents URLs with those schemes from being cloned |
|
* automatically. |
|
*/ |
|
if (skip_prefix(url, "http::", out) || |
|
skip_prefix(url, "https::", out) || |
|
skip_prefix(url, "ftp::", out) || |
|
skip_prefix(url, "ftps::", out)) |
|
return 1; |
|
if (starts_with(url, "http://") || |
|
starts_with(url, "https://") || |
|
starts_with(url, "ftp://") || |
|
starts_with(url, "ftps://")) { |
|
*out = url; |
|
return 1; |
|
} |
|
return 0; |
|
} |
|
|
|
static int check_submodule_url(const char *url) |
|
{ |
|
const char *curl_url; |
|
|
|
if (looks_like_command_line_option(url)) |
|
return -1; |
|
|
|
if (submodule_url_is_relative(url) || starts_with(url, "git://")) { |
|
char *decoded; |
|
const char *next; |
|
int has_nl; |
|
|
|
/* |
|
* This could be appended to an http URL and url-decoded; |
|
* check for malicious characters. |
|
*/ |
|
decoded = url_decode(url); |
|
has_nl = !!strchr(decoded, '\n'); |
|
|
|
free(decoded); |
|
if (has_nl) |
|
return -1; |
|
|
|
/* |
|
* URLs which escape their root via "../" can overwrite |
|
* the host field and previous components, resolving to |
|
* URLs like https::example.com/submodule.git and |
|
* https:///example.com/submodule.git that were |
|
* susceptible to CVE-2020-11008. |
|
*/ |
|
if (count_leading_dotdots(url, &next) > 0 && |
|
(*next == ':' || *next == '/')) |
|
return -1; |
|
} |
|
|
|
else if (url_to_curl_url(url, &curl_url)) { |
|
struct credential c = CREDENTIAL_INIT; |
|
int ret = 0; |
|
if (credential_from_url_gently(&c, curl_url, 1) || |
|
!*c.host) |
|
ret = -1; |
|
credential_clear(&c); |
|
return ret; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
struct fsck_gitmodules_data { |
|
const struct object_id *oid; |
|
struct fsck_options *options; |
|
int ret; |
|
}; |
|
|
|
static int fsck_gitmodules_fn(const char *var, const char *value, void *vdata) |
|
{ |
|
struct fsck_gitmodules_data *data = vdata; |
|
const char *subsection, *key; |
|
size_t subsection_len; |
|
char *name; |
|
|
|
if (parse_config_key(var, "submodule", &subsection, &subsection_len, &key) < 0 || |
|
!subsection) |
|
return 0; |
|
|
|
name = xmemdupz(subsection, subsection_len); |
|
if (check_submodule_name(name) < 0) |
|
data->ret |= report(data->options, |
|
data->oid, OBJ_BLOB, |
|
FSCK_MSG_GITMODULES_NAME, |
|
"disallowed submodule name: %s", |
|
name); |
|
if (!strcmp(key, "url") && value && |
|
check_submodule_url(value) < 0) |
|
data->ret |= report(data->options, |
|
data->oid, OBJ_BLOB, |
|
FSCK_MSG_GITMODULES_URL, |
|
"disallowed submodule url: %s", |
|
value); |
|
if (!strcmp(key, "path") && value && |
|
looks_like_command_line_option(value)) |
|
data->ret |= report(data->options, |
|
data->oid, OBJ_BLOB, |
|
FSCK_MSG_GITMODULES_PATH, |
|
"disallowed submodule path: %s", |
|
value); |
|
if (!strcmp(key, "update") && value && |
|
parse_submodule_update_type(value) == SM_UPDATE_COMMAND) |
|
data->ret |= report(data->options, data->oid, OBJ_BLOB, |
|
FSCK_MSG_GITMODULES_UPDATE, |
|
"disallowed submodule update setting: %s", |
|
value); |
|
free(name); |
|
|
|
return 0; |
|
} |
|
|
|
static int fsck_blob(const struct object_id *oid, const char *buf, |
|
unsigned long size, struct fsck_options *options) |
|
{ |
|
struct fsck_gitmodules_data data; |
|
struct config_options config_opts = { 0 }; |
|
|
|
if (!oidset_contains(&gitmodules_found, oid)) |
|
return 0; |
|
oidset_insert(&gitmodules_done, oid); |
|
|
|
if (object_on_skiplist(options, oid)) |
|
return 0; |
|
|
|
if (!buf) { |
|
/* |
|
* A missing buffer here is a sign that the caller found the |
|
* blob too gigantic to load into memory. Let's just consider |
|
* that an error. |
|
*/ |
|
return report(options, oid, OBJ_BLOB, |
|
FSCK_MSG_GITMODULES_LARGE, |
|
".gitmodules too large to parse"); |
|
} |
|
|
|
data.oid = oid; |
|
data.options = options; |
|
data.ret = 0; |
|
config_opts.error_action = CONFIG_ERROR_SILENT; |
|
if (git_config_from_mem(fsck_gitmodules_fn, CONFIG_ORIGIN_BLOB, |
|
".gitmodules", buf, size, &data, &config_opts)) |
|
data.ret |= report(options, oid, OBJ_BLOB, |
|
FSCK_MSG_GITMODULES_PARSE, |
|
"could not parse gitmodules blob"); |
|
|
|
return data.ret; |
|
} |
|
|
|
int fsck_object(struct object *obj, void *data, unsigned long size, |
|
struct fsck_options *options) |
|
{ |
|
if (!obj) |
|
return report(options, NULL, OBJ_NONE, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck"); |
|
|
|
if (obj->type == OBJ_BLOB) |
|
return fsck_blob(&obj->oid, data, size, options); |
|
if (obj->type == OBJ_TREE) |
|
return fsck_tree(&obj->oid, data, size, options); |
|
if (obj->type == OBJ_COMMIT) |
|
return fsck_commit(&obj->oid, data, size, options); |
|
if (obj->type == OBJ_TAG) |
|
return fsck_tag(&obj->oid, data, size, options); |
|
|
|
return report(options, &obj->oid, obj->type, |
|
FSCK_MSG_UNKNOWN_TYPE, |
|
"unknown type '%d' (internal fsck error)", |
|
obj->type); |
|
} |
|
|
|
int fsck_error_function(struct fsck_options *o, |
|
const struct object_id *oid, |
|
enum object_type object_type, |
|
int msg_type, const char *message) |
|
{ |
|
if (msg_type == FSCK_WARN) { |
|
warning("object %s: %s", fsck_describe_object(o, oid), message); |
|
return 0; |
|
} |
|
error("object %s: %s", fsck_describe_object(o, oid), message); |
|
return 1; |
|
} |
|
|
|
int fsck_finish(struct fsck_options *options) |
|
{ |
|
int ret = 0; |
|
struct oidset_iter iter; |
|
const struct object_id *oid; |
|
|
|
oidset_iter_init(&gitmodules_found, &iter); |
|
while ((oid = oidset_iter_next(&iter))) { |
|
enum object_type type; |
|
unsigned long size; |
|
char *buf; |
|
|
|
if (oidset_contains(&gitmodules_done, oid)) |
|
continue; |
|
|
|
buf = read_object_file(oid, &type, &size); |
|
if (!buf) { |
|
if (is_promisor_object(oid)) |
|
continue; |
|
ret |= report(options, |
|
oid, OBJ_BLOB, |
|
FSCK_MSG_GITMODULES_MISSING, |
|
"unable to read .gitmodules blob"); |
|
continue; |
|
} |
|
|
|
if (type == OBJ_BLOB) |
|
ret |= fsck_blob(oid, buf, size, options); |
|
else |
|
ret |= report(options, |
|
oid, type, |
|
FSCK_MSG_GITMODULES_BLOB, |
|
"non-blob found at .gitmodules"); |
|
free(buf); |
|
} |
|
|
|
|
|
oidset_clear(&gitmodules_found); |
|
oidset_clear(&gitmodules_done); |
|
return ret; |
|
} |
|
|
|
int fsck_config_internal(const char *var, const char *value, void *cb, |
|
struct fsck_options *options) |
|
{ |
|
if (strcmp(var, "fsck.skiplist") == 0) { |
|
const char *path; |
|
struct strbuf sb = STRBUF_INIT; |
|
|
|
if (git_config_pathname(&path, var, value)) |
|
return 1; |
|
strbuf_addf(&sb, "skiplist=%s", path); |
|
free((char *)path); |
|
fsck_set_msg_types(options, sb.buf); |
|
strbuf_release(&sb); |
|
return 0; |
|
} |
|
|
|
if (skip_prefix(var, "fsck.", &var)) { |
|
fsck_set_msg_type(options, var, value); |
|
return 0; |
|
} |
|
|
|
return git_default_config(var, value, cb); |
|
}
|
|
|