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Date: Fri, 22 Mar 2019 16:44:06 +0100 From: Arnd Bergmann <arnd@...db.de> To: stable@...r.kernel.org, Felipe Balbi <balbi@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org> Cc: Peter Chen <peter.chen@....com>, Felipe Balbi <felipe.balbi@...ux.intel.com>, Arnd Bergmann <arnd@...db.de>, Benjamin Herrenschmidt <benh@...nel.crashing.org>, Chunfeng Yun <chunfeng.yun@...iatek.com>, linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [BACKPORT 4.4.y 15/25] usb: gadget: composite: fix dereference after null check coverify warning From: Peter Chen <peter.chen@....com> cdev->config is checked for null pointer at above code, so cdev->config might be null, fix it by adding null pointer check. Signed-off-by: Peter Chen <peter.chen@....com> Signed-off-by: Felipe Balbi <felipe.balbi@...ux.intel.com> (cherry picked from commit c526c62d565ea5a5bba9433f28756079734f430d) Signed-off-by: Arnd Bergmann <arnd@...db.de> --- drivers/usb/gadget/composite.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index 58f5fbdb6959..8bf54477f472 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -1819,6 +1819,8 @@ unknown: break; case USB_RECIP_ENDPOINT: + if (!cdev->config) + break; endp = ((w_index & 0x80) >> 3) | (w_index & 0x0f); list_for_each_entry(f, &cdev->config->functions, list) { if (test_bit(endp, f->endpoints)) -- 2.20.0
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