Patch "i40iw: Avoid writing to freed memory" has been added to the 4.7-stable tree

[<gregkh@linuxfoundation.org>]

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

    i40iw: Avoid writing to freed memory

to the 4.7-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:
     i40iw-avoid-writing-to-freed-memory.patch
and it can be found in the queue-4.7 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 433c58139f6a7d59824aadd23d6c9cac1d4e6100 Mon Sep 17 00:00:00 2001
From: Mustafa Ismail <mustafa.ismail@intel.com>
Date: Tue, 23 Aug 2016 17:24:56 -0500
Subject: i40iw: Avoid writing to freed memory

From: Mustafa Ismail <mustafa.ismail@intel.com>

commit 433c58139f6a7d59824aadd23d6c9cac1d4e6100 upstream.

iwpbl->iwmr points to the structure that contains iwpbl,
which is iwmr. Setting this to NULL would result in
writing to freed memory. So just free iwmr, and return.

Fixes: d37498417947 ("i40iw: add files for iwarp interface")

Reported-by: Stefan Assmann <sassmann@redhat.com>
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/hw/i40iw/i40iw_verbs.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/drivers/infiniband/hw/i40iw/i40iw_verbs.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_verbs.c
@@ -1924,8 +1924,7 @@ static int i40iw_dereg_mr(struct ib_mr *
 		}
 		if (iwpbl->pbl_allocated)
 			i40iw_free_pble(iwdev->pble_rsrc, palloc);
-		kfree(iwpbl->iwmr);
-		iwpbl->iwmr = NULL;
+		kfree(iwmr);
 		return 0;
 	}
 


Patches currently in stable-queue which might be from mustafa.ismail@intel.com are

queue-4.7/i40iw-update-hw_iwarp_state.patch
queue-4.7/i40iw-add-missing-check-for-interface-already-open.patch
queue-4.7/i40iw-fix-double-free-of-allocated_buffer.patch
queue-4.7/i40iw-receive-notification-events-correctly.patch
queue-4.7/i40iw-change-mem_resources-pointer-to-a-u8.patch
queue-4.7/i40iw-protect-req_resource_num-update.patch
queue-4.7/i40iw-add-missing-null-check-for-mpa-private-data.patch
queue-4.7/i40iw-avoid-writing-to-freed-memory.patch
queue-4.7/i40iw-do-not-set-self-referencing-pointer-to-null-after-kfree.patch