This is a note to let you know that I've just added the patch titled
usb: renesas_usbhs: gadget: fix NULL pointer dereference in ep_disable()
to the 3.18-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:
usb-renesas_usbhs-gadget-fix-null-pointer-dereference-in-ep_disable.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 11432050f070810ba139d0226344eef120c3a559 Mon Sep 17 00:00:00 2001
From: Kazuya Mizuguchi <kazuya.mizuguchi.ks@xxxxxxxxxxx>
Date: Tue, 4 Nov 2014 10:05:42 +0900
Subject: usb: renesas_usbhs: gadget: fix NULL pointer dereference in ep_disable()
From: Kazuya Mizuguchi <kazuya.mizuguchi.ks@xxxxxxxxxxx>
commit 11432050f070810ba139d0226344eef120c3a559 upstream.
This patch fixes an issue that the NULL pointer dereference happens
when we uses g_audio driver. Since the g_audio driver will call
usb_ep_disable() in afunc_set_alt() before it calls usb_ep_enable(),
the uep->pipe of renesas usbhs driver will be NULL. So, this patch
adds a condition to avoid the oops.
Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@xxxxxxxxxxx>
Signed-off-by: Takeshi Kihara <takeshi.kihara.df@xxxxxxxxxxx>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
Fixes: 2f98382dc (usb: renesas_usbhs: Add Renesas USBHS Gadget)
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/renesas_usbhs/mod_gadget.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/usb/renesas_usbhs/mod_gadget.c
+++ b/drivers/usb/renesas_usbhs/mod_gadget.c
@@ -602,6 +602,9 @@ static int usbhsg_ep_disable(struct usb_
struct usbhsg_uep *uep = usbhsg_ep_to_uep(ep);
struct usbhs_pipe *pipe = usbhsg_uep_to_pipe(uep);
+ if (!pipe)
+ return -EINVAL;
+
usbhsg_pipe_disable(uep);
usbhs_pipe_free(pipe);
Patches currently in stable-queue which might be from kazuya.mizuguchi.ks@xxxxxxxxxxx are
queue-3.18/usb-renesas_usbhs-gadget-fix-null-pointer-dereference-in-ep_disable.patch
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