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 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ib-rxe-check-for-allocation-failure-on-elem.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Dec 21 09:02:40 CET 2017
From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
Date: Fri, 8 Sep 2017 15:37:45 +0100
Subject: IB/rxe: check for allocation failure on elem
From: Colin Ian King <colin.king@xxxxxxxxxxxxx>
[ 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@xxxxxxxxxxxxx>
Signed-off-by: Doug Ledford <dledford@xxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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
@@ -412,6 +412,8 @@ 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@xxxxxxxxxxxxx are
queue-4.9/ib-rxe-check-for-allocation-failure-on-elem.patch