From 211c61c6cf56699fc7b520a0206d23f5e4a7261b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Nguy=E1=BB=85n=20Th=C3=A1i=20Ng=E1=BB=8Dc=20Duy?= Date: Tue, 5 Jul 2016 19:05:54 +0200 Subject: pack-objects: pass length to check_pack_crc() without truncation MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 32 bit systems with large file support, unsigned long is 32-bit while the two offsets in the subtraction expression (pack-objects has the exact same expression as in sha1_file.c but not shown in diff) are in 64-bit. If an in-pack object is larger than 2^32 len/datalen is truncated and we get a misleading "error: bad packed object CRC for ..." as a result. Use off_t for len and datalen. check_pack_crc() already accepts this argument as off_t and can deal with 4+ GB. Noticed-by: Christoph Michelbach Signed-off-by: Nguyễn Thái Ngọc Duy Signed-off-by: Junio C Hamano --- sha1_file.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'sha1_file.c') diff --git a/sha1_file.c b/sha1_file.c index d0f2aa029..cd9b560e7 100644 --- a/sha1_file.c +++ b/sha1_file.c @@ -2282,7 +2282,7 @@ void *unpack_entry(struct packed_git *p, off_t obj_offset, if (do_check_packed_object_crc && p->index_version > 1) { struct revindex_entry *revidx = find_pack_revindex(p, obj_offset); - unsigned long len = revidx[1].offset - obj_offset; + off_t len = revidx[1].offset - obj_offset; if (check_pack_crc(p, &w_curs, obj_offset, len, revidx->nr)) { const unsigned char *sha1 = nth_packed_object_sha1(p, revidx->nr); -- cgit v1.2.1