This is a note to let you know that I've just added the patch titled
IB/rxe: check for allocation failure on elem
to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...
The filename of the patch is: ib-rxe-check-for-allocation-failure-on-elem.patch and it can be found in the queue-4.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.
From foo@baz Wed Dec 20 18:17:52 CET 2017
From: Colin Ian King colin.king@canonical.com Date: Fri, 8 Sep 2017 15:37:45 +0100 Subject: IB/rxe: check for allocation failure on elem
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/infiniband/sw/rxe/rxe_pool.c | 2 ++ 1 file changed, 2 insertions(+)
--- 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);
Patches currently in stable-queue which might be from colin.king@canonical.com are
queue-4.14/ib-rxe-check-for-allocation-failure-on-elem.patch