This is a note to let you know that I've just added the patch titled

IB/hfi1: Prevent a NULL dereference

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-hfi1-prevent-a-null-dereference.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 57194fa763bfa1a0908f30d4c77835beaa118fcb Mon Sep 17 00:00:00 2001

From: Dan Carpenter dan.carpenter@oracle.com Date: Tue, 9 Jan 2018 23:03:46 +0300 Subject: IB/hfi1: Prevent a NULL dereference

From: Dan Carpenter dan.carpenter@oracle.com

commit 57194fa763bfa1a0908f30d4c77835beaa118fcb upstream.

In the original code, we set "fd->uctxt" to NULL and then dereference it which will cause an Oops.

Fixes: f2a3bc00a03c ("IB/hfi1: Protect context array set/clear with spinlock") Signed-off-by: Dan Carpenter dan.carpenter@oracle.com Reviewed-by: Michael J. Ruhl michael.j.ruhl@intel.com Signed-off-by: Doug Ledford dledford@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

--- drivers/infiniband/hw/hfi1/file_ops.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/hw/hfi1/file_ops.c +++ b/drivers/infiniband/hw/hfi1/file_ops.c @@ -881,11 +881,11 @@ static int complete_subctxt(struct hfi1_ }

if (ret) { - hfi1_rcd_put(fd->uctxt); - fd->uctxt = NULL; spin_lock_irqsave(&fd->dd->uctxt_lock, flags); __clear_bit(fd->subctxt, fd->uctxt->in_use_ctxts); spin_unlock_irqrestore(&fd->dd->uctxt_lock, flags); + hfi1_rcd_put(fd->uctxt); + fd->uctxt = NULL; }

return ret;

Patches currently in stable-queue which might be from dan.carpenter@oracle.com are

queue-4.14/ib-hfi1-prevent-a-null-dereference.patch