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fsck: check ident lines in commit objects 

Check that email addresses do not contain <, >, or newline so they can
be quickly scanned without trouble.  The copy() function in ident.c
already ensures that ordinary git commands will not write email
addresses without this property.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Jonathan Nieder 2010-04-24 11:06:08 -05:00 committed by Junio C Hamano
parent d599e0484f
commit daae19224a
2 changed files with 75 additions and 0 deletions
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47
fsck.c
View File

@ -222,12 +222,47 @@ static int fsck_tree(struct tree *item, int strict, fsck_error error_func)
return retval;
}

static int fsck_ident(char **ident, struct object *obj, fsck_error error_func)
{
if (**ident == '<' || **ident == '\n')
return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing space before email");
*ident += strcspn(*ident, "<\n");
if ((*ident)[-1] != ' ')
return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing space before email");
if (**ident != '<')
return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing email");
(*ident)++;
*ident += strcspn(*ident, "<>\n");
if (**ident != '>')
return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad email");
(*ident)++;
if (**ident != ' ')
return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing space before date");
(*ident)++;
if (**ident == '0' && (*ident)[1] != ' ')
return error_func(obj, FSCK_ERROR, "invalid author/committer line - zero-padded date");
*ident += strspn(*ident, "0123456789");
if (**ident != ' ')
return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad date");
(*ident)++;
if ((**ident != '+' && **ident != '-') ||
!isdigit((*ident)[1]) ||
!isdigit((*ident)[2]) ||
!isdigit((*ident)[3]) ||
!isdigit((*ident)[4]) ||
((*ident)[5] != '\n'))
return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad time zone");
(*ident) += 6;
return 0;
}

static int fsck_commit(struct commit *commit, fsck_error error_func)
{
char *buffer = commit->buffer;
unsigned char tree_sha1[20], sha1[20];
struct commit_graft *graft;
int parents = 0;
int err;

if (commit->date == ULONG_MAX)
return error_func(&commit->object, FSCK_ERROR, "invalid author/committer line");
@ -266,6 +301,18 @@ static int fsck_commit(struct commit *commit, fsck_error error_func)
}
if (memcmp(buffer, "author ", 7))
return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'author' line");
buffer += 7;
err = fsck_ident(&buffer, &commit->object, error_func);
if (err)
return err;
if (memcmp(buffer, "committer ", strlen("committer ")))
return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'committer' line");
buffer += strlen("committer ");
err = fsck_ident(&buffer, &commit->object, error_func);
if (err)
return err;
if (*buffer != '\n')
return error_func(&commit->object, FSCK_ERROR, "invalid format - expected blank line");
if (!commit->tree)
return error_func(&commit->object, FSCK_ERROR, "could not load commit's tree %s", sha1_to_hex(tree_sha1));


28
t/t1450-fsck.sh
View File

@ -57,6 +57,34 @@ test_expect_success 'branch pointing to non-commit' '
git update-ref -d refs/heads/invalid
'

new=nothing
test_expect_success 'email without @ is okay' '
git cat-file commit HEAD >basis &&
sed "s/@/AT/" basis >okay &&
new=$(git hash-object -t commit -w --stdin <okay) &&
echo "$new" &&
git update-ref refs/heads/bogus "$new" &&
git fsck 2>out &&
cat out &&
! grep "error in commit $new" out
'
git update-ref -d refs/heads/bogus
rm -f ".git/objects/$new"

new=nothing
test_expect_success 'email with embedded > is not okay' '
git cat-file commit HEAD >basis &&
sed "s/@[a-z]/&>/" basis >bad-email &&
new=$(git hash-object -t commit -w --stdin <bad-email) &&
echo "$new" &&
git update-ref refs/heads/bogus "$new" &&
git fsck 2>out &&
cat out &&
grep "error in commit $new" out
'
git update-ref -d refs/heads/bogus
rm -f ".git/objects/$new"

cat > invalid-tag <<EOF
object ffffffffffffffffffffffffffffffffffffffff
type commit