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lib/btree: fix possible NULL pointer dereference 

mempool_alloc() can return null in atomic case.

Signed-off-by: Denis Kirjanov <kirjanov@gmail.com>
Cc: Joern Engel <joern@logfs.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
hifive-unleashed-5.1
kirjanov@gmail.com 2010-05-15 12:32:34 -04:00 committed by Linus Torvalds
parent bdef2fe88b
commit 43aa7ac736
1 changed files with 2 additions and 1 deletions
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lib/btree.c
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@ -95,7 +95,8 @@ static unsigned long *btree_node_alloc(struct btree_head *head, gfp_t gfp)
unsigned long *node;
node = mempool_alloc(head->mempool, gfp);
memset(node, 0, NODESIZE);
if (likely(node))
memset(node, 0, NODESIZE);
return node;
}