diff options
Diffstat (limited to 'builtin-unpack-objects.c')
| -rw-r--r-- | builtin-unpack-objects.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/builtin-unpack-objects.c b/builtin-unpack-objects.c index 3956c56334..f821906460 100644 --- a/builtin-unpack-objects.c +++ b/builtin-unpack-objects.c @@ -13,7 +13,8 @@ static const char unpack_usage[] = "git-unpack-objects [-n] [-q] [-r] < pack-fil /* We always read in 4kB chunks. */ static unsigned char buffer[4096]; -static unsigned long offset, len, consumed_bytes; +static unsigned int offset, len; +static off_t consumed_bytes; static SHA_CTX ctx; /* @@ -49,6 +50,10 @@ static void use(int bytes) die("used more bytes than were available"); len -= bytes; offset += bytes; + + /* make sure off_t is sufficiently large not to wrap */ + if (consumed_bytes > consumed_bytes + bytes) + die("pack too large for current definition of off_t"); consumed_bytes += bytes; } @@ -88,17 +93,17 @@ static void *get_data(unsigned long size) struct delta_info { unsigned char base_sha1[20]; - unsigned long base_offset; + unsigned nr; + off_t base_offset; unsigned long size; void *delta; - unsigned nr; struct delta_info *next; }; static struct delta_info *delta_list; static void add_delta_to_list(unsigned nr, unsigned const char *base_sha1, - unsigned long base_offset, + off_t base_offset, void *delta, unsigned long size) { struct delta_info *info = xmalloc(sizeof(*info)); @@ -113,7 +118,7 @@ static void add_delta_to_list(unsigned nr, unsigned const char *base_sha1, } struct obj_info { - unsigned long offset; + off_t offset; unsigned char sha1[20]; }; @@ -200,7 +205,7 @@ static void unpack_delta_entry(enum object_type type, unsigned long delta_size, } else { unsigned base_found = 0; unsigned char *pack, c; - unsigned long base_offset; + off_t base_offset; unsigned lo, mid, hi; pack = fill(1); @@ -209,7 +214,7 @@ static void unpack_delta_entry(enum object_type type, unsigned long delta_size, base_offset = c & 127; while (c & 128) { base_offset += 1; - if (!base_offset || base_offset & ~(~0UL >> 7)) + if (!base_offset || MSB(base_offset, 7)) die("offset value overflow for delta base object"); pack = fill(1); c = *pack; |