| From | alexander.levin@verizon ... | Subject | [PATCH AUTOSEL for 4.14 24/60] IB/rxe: check for allocation failure on elem | Date | Wed, 13 Dec 2017 01:55:16 +0000 |
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From: Colin Ian King <colin.king@canonical.com>
[ Upstream commit 4831ca9e4a8e48cb27e0a792f73250390827a228 ]
The allocation for elem may fail (especially because we're using GFP_ATOMIC) so best to check for a null return. This fixes a potential null pointer dereference when assigning elem->pool.
Detected by CoverityScan CID#1357507 ("Dereference null return value")
Fixes: 8700e3e7c485 ("Soft RoCE driver") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Doug Ledford <dledford@redhat.com> Signed-off-by: Sasha Levin <alexander.levin@verizon.com> --- drivers/infiniband/sw/rxe/rxe_pool.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/infiniband/sw/rxe/rxe_pool.c b/drivers/infiniband/sw/rxe/rxe_pool.c index c1b5f38f31a5..3b4916680018 100644 --- a/drivers/infiniband/sw/rxe/rxe_pool.c +++ b/drivers/infiniband/sw/rxe/rxe_pool.c @@ -404,6 +404,8 @@ void *rxe_alloc(struct rxe_pool *pool) elem = kmem_cache_zalloc(pool_cache(pool), (pool->flags & RXE_POOL_ATOMIC) ? GFP_ATOMIC : GFP_KERNEL); + if (!elem) + return NULL; elem->pool = pool; kref_init(&elem->ref_cnt); -- 2.11.0
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