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| author | kirjanov@gmail.com <kirjanov@gmail.com> | 2010-05-15 12:32:34 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-05-15 12:48:10 -0700 |
| commit | 43aa7ac736a4e21aae4882bd8f7c67403aed45b8 (patch) | |
| tree | 8ebbe9c6053c6552de8ee120384afb1b02bf8f47 /lib/btree.c | |
| parent | bdef2fe88b1e4bde7458aedd207929ce3f9d66ee (diff) | |
| download | lwn-43aa7ac736a4e21aae4882bd8f7c67403aed45b8.tar.gz lwn-43aa7ac736a4e21aae4882bd8f7c67403aed45b8.zip | |
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>
Diffstat (limited to 'lib/btree.c')
| -rw-r--r-- | lib/btree.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/btree.c b/lib/btree.c index 41859a820218..c9c6f0351526 100644 --- a/lib/btree.c +++ b/lib/btree.c @@ -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; } |