This is a note to let you know that I've just added the patch titled
xhci: Fix ring leak in failure path of xhci_alloc_virt_device()
to the 4.4-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:
xhci-fix-ring-leak-in-failure-path-of-xhci_alloc_virt_device.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ben.hutchings@xxxxxxxxxxxxxxx Thu Jan 11 18:12:08 2018
From: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx>
Date: Thu, 11 Jan 2018 17:01:36 +0000
Subject: xhci: Fix ring leak in failure path of xhci_alloc_virt_device()
Message-ID: <20180111170136.abfqwdgvgapfiumn@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
From: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx>
This is a stable-only fix for the backport of commit 5d9b70f7d52e
("xhci: Don't add a virt_dev to the devs array before it's fully
allocated").
In branches that predate commit c5628a2af83a ("xhci: remove endpoint
ring cache") there is an additional failure path in
xhci_alloc_virt_device() where ring cache allocation fails, in
which case we need to free the ring allocated for endpoint 0.
Signed-off-by: Ben Hutchings <ben.hutchings@xxxxxxxxxxxxxxx>
Cc: Mathias Nyman <mathias.nyman@xxxxxxxxx>
---
This is build-tested only.
Ben.
drivers/usb/host/xhci-mem.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/host/xhci-mem.c
+++ b/drivers/usb/host/xhci-mem.c
@@ -1071,7 +1071,8 @@ int xhci_alloc_virt_device(struct xhci_h
return 1;
fail:
-
+ if (dev->eps[0].ring)
+ xhci_ring_free(xhci, dev->eps[0].ring);
if (dev->in_ctx)
xhci_free_container_ctx(xhci, dev->in_ctx);
if (dev->out_ctx)
Patches currently in stable-queue which might be from ben.hutchings@xxxxxxxxxxxxxxx are
queue-4.4/xhci-fix-ring-leak-in-failure-path-of-xhci_alloc_virt_device.patch