The patch below does not apply to the 3.14-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable@xxxxxxxxxxxxxxx>. thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >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: [PATCH] usb: renesas_usbhs: gadget: fix NULL pointer dereference in ep_disable() 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) Cc: <stable@xxxxxxxxxxxxxxx> # v3.0+ Signed-off-by: Felipe Balbi <balbi@xxxxxx> diff --git a/drivers/usb/renesas_usbhs/mod_gadget.c b/drivers/usb/renesas_usbhs/mod_gadget.c index 7a4521030505..ac51b594590d 100644 --- 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_ep *ep) 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); -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html