From 97a41a0c01cdcbe8153f6b269ff21ee74ecf0092 Mon Sep 17 00:00:00 2001 From: Patryk Obara Date: Sun, 28 Jan 2018 01:13:14 +0100 Subject: [PATCH] cache: clear whole hash buffer with oidclr As long as GIT_SHA1_RAWSZ is equal to GIT_MAX_RAWSZ there's no problem, but when new hashing algorithm will be in place this memset will clear only 20-byte prefix of hash buffer. Alternatively, hashclr implementation could be adjusted, but this function is almost removed from codebase already. Separate implementation of oidclr prevents potential buffer overrun in case someone incorrectly used hashclr on object_id in future. Signed-off-by: Patryk Obara Signed-off-by: Junio C Hamano --- cache.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/cache.h b/cache.h index 08f2b81e1b..d5d78d6a51 100644 --- a/cache.h +++ b/cache.h @@ -1029,7 +1029,7 @@ static inline void hashclr(unsigned char *hash) static inline void oidclr(struct object_id *oid) { - hashclr(oid->hash); + memset(oid->hash, 0, GIT_MAX_RAWSZ); }