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IB/rxe: check for allocation failure on elem 

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: 8700e3e7c4 ("Soft RoCE driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Colin Ian King 2017-09-08 15:37:45 +01:00 committed by Doug Ledford
parent 4988be5813
commit 4831ca9e4a
1 changed files with 2 additions and 0 deletions
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2
drivers/infiniband/sw/rxe/rxe_pool.c
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@ -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);