parse_tag_buffer(): do not prefixcmp() out of range
There is a check (size < 64) at the beginning of the function, but
that only covers object+type lines.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/tag.c b/tag.c
index ecf7c1e..7d38cc0 100644
--- a/tag.c
+++ b/tag.c
@@ -97,7 +97,9 @@
item->tagged = NULL;
}
- if (prefixcmp(bufptr, "tag "))
+ if (bufptr + 4 < tail && !prefixcmp(bufptr, "tag "))
+ ; /* good */
+ else
return -1;
bufptr += 4;
nl = memchr(bufptr, '\n', tail - bufptr);
@@ -106,7 +108,7 @@
item->tag = xmemdupz(bufptr, nl - bufptr);
bufptr = nl + 1;
- if (!prefixcmp(bufptr, "tagger "))
+ if (bufptr + 7 < tail && !prefixcmp(bufptr, "tagger "))
item->date = parse_tag_date(bufptr, tail);
else
item->date = 0;
