From 33bc949a1e927e14479568518bd92e70998e25f8 Mon Sep 17 00:00:00 2001 From: John Keeping Date: Sat, 16 Jan 2016 11:03:07 +0000 Subject: cache: don't check for match with no key We call open_slot() from cache_ls() without a key since we simply want to read the path out of the header. Should the file happen to contain an empty key then we end up calling memcmp() with NULL and a non-zero length. Fix this by assigning slot->match only if a key is set, which is always will be in the code paths where we use slot->match. Coverity-id: 13807 Signed-off-by: John Keeping --- cache.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/cache.c b/cache.c index df1b4a3..6736a01 100644 --- a/cache.c +++ b/cache.c @@ -61,8 +61,9 @@ static int open_slot(struct cache_slot *slot) if (bufz) bufkeylen = bufz - slot->buf; - slot->match = bufkeylen == slot->keylen && - !memcmp(slot->key, slot->buf, bufkeylen + 1); + if (slot->key) + slot->match = bufkeylen == slot->keylen && + !memcmp(slot->key, slot->buf, bufkeylen + 1); return 0; } -- cgit v1.2.1