diff options
Diffstat (limited to 'sha1_file.c')
| -rw-r--r-- | sha1_file.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/sha1_file.c b/sha1_file.c index 6d0a72ed0..ac6b5e00b 100644 --- a/sha1_file.c +++ b/sha1_file.c @@ -956,11 +956,12 @@ static int unpack_sha1_header(z_stream *stream, unsigned char *map, unsigned lon return 0; } -static void *unpack_sha1_rest(z_stream *stream, void *buffer, unsigned long size) +static void *unpack_sha1_rest(z_stream *stream, void *buffer, unsigned long size, const unsigned char *sha1) { int bytes = strlen(buffer) + 1; unsigned char *buf = xmalloc(1+size); unsigned long n; + int status = Z_OK; n = stream->total_out - bytes; if (n > size) @@ -970,12 +971,22 @@ static void *unpack_sha1_rest(z_stream *stream, void *buffer, unsigned long size if (bytes < size) { stream->next_out = buf + bytes; stream->avail_out = size - bytes; - while (inflate(stream, Z_FINISH) == Z_OK) - /* nothing */; + while (status == Z_OK) + status = inflate(stream, Z_FINISH); } buf[size] = 0; - inflateEnd(stream); - return buf; + if ((status == Z_OK || status == Z_STREAM_END) && !stream->avail_in) { + inflateEnd(stream); + return buf; + } + + if (status < 0) + error("corrupt loose object '%s'", sha1_to_hex(sha1)); + else if (stream->avail_in) + error("garbage at end of loose object '%s'", + sha1_to_hex(sha1)); + free(buf); + return NULL; } /* @@ -1029,7 +1040,7 @@ static int parse_sha1_header(const char *hdr, unsigned long *sizep) return *hdr ? -1 : type_from_string(type); } -void * unpack_sha1_file(void *map, unsigned long mapsize, enum object_type *type, unsigned long *size) +static void *unpack_sha1_file(void *map, unsigned long mapsize, enum object_type *type, unsigned long *size, const unsigned char *sha1) { int ret; z_stream stream; @@ -1039,7 +1050,7 @@ void * unpack_sha1_file(void *map, unsigned long mapsize, enum object_type *type if (ret < Z_OK || (*type = parse_sha1_header(hdr, size)) < 0) return NULL; - return unpack_sha1_rest(&stream, hdr, *size); + return unpack_sha1_rest(&stream, hdr, *size, sha1); } static unsigned long get_delta_base(struct packed_git *p, @@ -1555,7 +1566,7 @@ void *read_sha1_file(const unsigned char *sha1, enum object_type *type, return buf; map = map_sha1_file(sha1, &mapsize); if (map) { - buf = unpack_sha1_file(map, mapsize, type, size); + buf = unpack_sha1_file(map, mapsize, type, size, sha1); munmap(map, mapsize); return buf; } |