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index-pack: correct "len" type in unpack_data() 

On 32-bit systems with large file support, one entry could be larger
than 4GB and overflow "len". Correct it so we can unpack a full entry.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Nguyễn Thái Ngọc Duy 2016-07-13 17:44:00 +02:00 committed by Junio C Hamano
parent 166df26f28
commit 7171a0b0cf
1 changed files with 7 additions and 7 deletions
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14
builtin/index-pack.c
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@ -549,13 +549,13 @@ static void *unpack_data(struct object_entry *obj,
void *cb_data) void *cb_data)
{ {
off_t from = obj[0].idx.offset + obj[0].hdr_size; off_t from = obj[0].idx.offset + obj[0].hdr_size;
unsigned long len = obj[1].idx.offset - from; off_t len = obj[1].idx.offset - from;
unsigned char *data, *inbuf; unsigned char *data, *inbuf;
git_zstream stream; git_zstream stream;
int status; int status;


data = xmallocz(consume ? 64*1024 : obj->size); data = xmallocz(consume ? 64*1024 : obj->size);
inbuf = xmalloc((len < 64*1024) ? len : 64*1024); inbuf = xmalloc((len < 64*1024) ? (int)len : 64*1024);


memset(&stream, 0, sizeof(stream)); memset(&stream, 0, sizeof(stream));
git_inflate_init(&stream); git_inflate_init(&stream);
@ -563,15 +563,15 @@ static void *unpack_data(struct object_entry *obj,
stream.avail_out = consume ? 64*1024 : obj->size; stream.avail_out = consume ? 64*1024 : obj->size;


do { do {
ssize_t n = (len < 64*1024) ? len : 64*1024; ssize_t n = (len < 64*1024) ? (ssize_t)len : 64*1024;
n = xpread(get_thread_data()->pack_fd, inbuf, n, from); n = xpread(get_thread_data()->pack_fd, inbuf, n, from);
if (n < 0) if (n < 0)
die_errno(_("cannot pread pack file")); die_errno(_("cannot pread pack file"));
if (!n) if (!n)
die(Q_("premature end of pack file, %lu byte missing", die(Q_("premature end of pack file, %"PRIuMAX" byte missing",
"premature end of pack file, %lu bytes missing", "premature end of pack file, %"PRIuMAX" bytes missing",
len), (unsigned int)len),
len); (uintmax_t)len);
from += n; from += n;
len -= n; len -= n;
stream.next_in = inbuf; stream.next_in = inbuf;