diff options
| -rw-r--r-- | commit.c | 27 |
1 files changed, 20 insertions, 7 deletions
@@ -48,19 +48,32 @@ struct commit *lookup_commit(const unsigned char *sha1) return check_commit(obj, sha1, 0); } -static unsigned long parse_commit_date(const char *buf) +static unsigned long parse_commit_date(const char *buf, const char *tail) { unsigned long date; + const char *dateptr; + if (buf + 6 >= tail) + return 0; if (memcmp(buf, "author", 6)) return 0; - while (*buf++ != '\n') + while (buf < tail && *buf++ != '\n') /* nada */; + if (buf + 9 >= tail) + return 0; if (memcmp(buf, "committer", 9)) return 0; - while (*buf++ != '>') + while (buf < tail && *buf++ != '>') /* nada */; - date = strtoul(buf, NULL, 10); + if (buf >= tail) + return 0; + dateptr = buf; + while (buf < tail && *buf++ != '\n') + /* nada */; + if (buf >= tail) + return 0; + /* dateptr < buf && buf[-1] == '\n', so strtoul will stop at buf-1 */ + date = strtoul(dateptr, NULL, 10); if (date == ULONG_MAX) date = 0; return date; @@ -236,9 +249,9 @@ int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size) return 0; item->object.parsed = 1; tail += size; - if (tail <= bufptr + 5 || memcmp(bufptr, "tree ", 5)) + if (tail <= bufptr + 46 || memcmp(bufptr, "tree ", 5) || bufptr[45] != '\n') return error("bogus commit object %s", sha1_to_hex(item->object.sha1)); - if (tail <= bufptr + 45 || get_sha1_hex(bufptr + 5, parent) < 0) + if (get_sha1_hex(bufptr + 5, parent) < 0) return error("bad tree pointer in commit %s", sha1_to_hex(item->object.sha1)); item->tree = lookup_tree(parent); @@ -275,7 +288,7 @@ int parse_commit_buffer(struct commit *item, void *buffer, unsigned long size) n_refs++; } } - item->date = parse_commit_date(bufptr); + item->date = parse_commit_date(bufptr, tail); if (track_object_refs) { unsigned i = 0; |