From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f172.google.com (mail-pg1-f172.google.com [209.85.215.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1BCB826FD93 for ; Mon, 3 Aug 2026 04:49:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785732572; cv=none; b=sxn/IJIlFPWQkdGh/tDrn5vfxn36cHZuoU0iLk9Tvf1Vudw3nZ06SA78zRta3feJj917XF68R/DXTG4JptvmitsBdF4IzMe1xC7OUxHUh7g+lqkCAjJN/Po6wmyZD08CAQ6jweDpVNcljecsuTU31A8Kg4t2Ejf4J0JVH77mFag= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785732572; c=relaxed/simple; bh=46HK5ojW10QtCqveZtmMIdvFVUvyO6vX8BARdRVpdX0=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=pa0XP/vfpeHNC9DR58eow/HugnQ9VoysB2BQgeVApkHyWW3w8SwYIJ4FIyDDXUVWnphRREYwqaH9+uFFM34npxS9Cgk5JquJi3V5/wSc5vF8vqz2XAGk2XtcGW14fcyIcB+WVfTXFdhrDzSg35MbBn/AsZtNIuK9BRuvy5tw740= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=n44XSYNZ; arc=none smtp.client-ip=209.85.215.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="n44XSYNZ" Received: by mail-pg1-f172.google.com with SMTP id 41be03b00d2f7-caf45fc5202so1954297a12.1 for ; Sun, 02 Aug 2026 21:49:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1785732570; x=1786337370; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to:content-type; bh=h6mXAlr/zwt8ZXOoLa52W+b3eDz4sTWHBZRzsSIRQPU=; b=n44XSYNZOXdqsYgyyJ7tAS1cXo+S0Jl/0mXdFnLO+ivS1+2HUBXZp4P3D6IacipDKG k98zIovp2BCXsjMQKqyIGyL8SWTdVhUnjAK6R2jd72j7nrd5CdZcO/aiQCMaBy5zWNzn 9zK70OtXqD543A5Rtum9jM02y8a/KHpV1UYfIigt5QajSDisAwOpFMIAsB9mIjEwfFk6 hdyfJLFQmTMNecSfni+UEl3jeEfaFojHe+ok2Fda3eyRNHgxkgpdPDhqwZAnKi/Rv5nw kR1aSuS3diI/r4x7V5L8QV2AxUGXeBDZnM0waUYcD+xbfVCUpeG4oK8gYwIKqEWZURW/ LFgA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785732570; x=1786337370; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to:content-type; bh=h6mXAlr/zwt8ZXOoLa52W+b3eDz4sTWHBZRzsSIRQPU=; b=LgDqRha49rwLa8FHijRZsZFECZdaeLT1zLxetqummvuju5M6YkDaZ5mDhMR8nnowgB Qot2nY+/MG6ry1FXpSLptbIhxD2WtGJ8naJylDxYdNG2VhKyU0bN48w9bJikC3Wn+c0F 19rR+78w6kmoVkLe/tO6MYZzbejLNtTWoNEVwYSIC/skJU3xY56iP2ch5luM2ToPLqiq gvZIWdJ7tFveI5wrq/Bkw57g4TpZyXU00xOc8FFkC1O/exsSPSBTKA538EYAOx8ZtHyo uC4+0jcLF1/noRRSb93Cg7V2auFj0rcwV09u64BpJuooT2eDVASsUZGfpDfeJx31sqyl 3GJw== X-Forwarded-Encrypted: i=1; AHgh+Ro2ICdJflXDcvO/8XByI3DN03iEQA0smLVvuLClxixfR/ebkzTwAnzKg0FUOxtdQtic8A94mnpVv5YAuAY=@vger.kernel.org X-Gm-Message-State: AOJu0Yz4t11T9i17DKklxU8tYE4SvYtbqztvPXEbL4lEMCnpBegpDljr HmAHfHgJb3DG1/00buHnr1WAjrd7NXiSexD8vnZNteBLZhjaaYsKFPJq X-Gm-Gg: AR+sD12T+txIXsO2I+06c33105nUfdgfpHbgjOWP2pzGZBBzhPG2BrXDOwlGEOCsR8m t0qBbU2G+qtRnELoDKHrXaPaVB2CkTJNXkGcc23gLsSXiTgMp4lkGasPi6j7i7EMRbkEUyDBxD4 r3IF18q/6NE+2kva8/Ypfne3RK67PRUq7lfxluwxaV6/lH5fRn2EnJWjNiac/4f25xbwHz8AFlG tKUYz5aRRk31B3a6hrLBXDgwQsEbiUQiNXsMfSVhO+5Bzmk2NX9zPqHWQ0lew/r9cFiW2HaNcOY JRavEk50bvwQ0SdN3AJsr4CFyik03UIyjZexkRvSO2Xd1F/mpki2UddrIh0uh3Ksy5IPFmUlXxv ApjW9dw1XnKVTBnuhuPa1hPkpe82MTcDK+kyrIP9flJCOcIlywbq3AKbqZVDuPE9QH9lChqs4oe xf65Y6lk38Ltcy8h/ApdF+8CldIcAcfjPekpbJ6Kn4YnM0gdyC9lAnJGEAhDFklDh9 X-Received: by 2002:a05:6a21:398b:b0:3c3:f5ff:8c9b with SMTP id adf61e73a8af0-3c92a8e2c72mr8019202637.71.1785732570300; Sun, 02 Aug 2026 21:49:30 -0700 (PDT) Received: from Default ([2409:40f4:10ff:eef4:b4e1:bfd0:d002:8e35]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3153e06fc98sm33236477eec.21.2026.08.02.21.49.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 02 Aug 2026 21:49:29 -0700 (PDT) From: Jeffin Philip To: gregkh@linuxfoundation.org Cc: xu.yang_2@nxp.com, Frank.Li@nxp.com, kees@kernel.org, panjunzhong@linux.spacemit.com, andrzej.p@samsung.com, laurent.pinchart@ideasonboard.com, balbi@ti.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Jeffin Philip , syzbot+8dcac923582c28505fd7@syzkaller.appspotmail.com, stable@vger.kernel.org Subject: [PATCH v6] usb: gadget: uvc: Fix Null Pointer Dereference in uvcg_video_init() Date: Mon, 3 Aug 2026 10:18:56 +0530 Message-ID: <20260803044856.9271-1-jeffinphilip14@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit In uvcg_video_init(), if kthread_run_worker() fails, the error logged uses uvcg_err(), however, the pointer it uses: video->uvc is not assigned at this point, triggering a null pointer dereference. Fix this by directly using uvc->func which is assigned already. Reported-by: syzbot+8dcac923582c28505fd7@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=8dcac923582c28505fd7 Fixes: 7ea95b110811 ("usb: gadget: uvc: rename functions to avoid conflicts with host uvc") Cc: stable@vger.kernel.org Signed-off-by: Jeffin Philip --- Changes in v6: No code changes from v5 Changes in v5: Added changelog as per maintainer suggestions Changes in v4: Changed Fixes commit line as per Xu Yang's suggestion Changes in v3: Shortened SHA1 hash as per maintainer comment Changes in v2: -Changed subject of the patch to include subsystem as per Xu Yang's comment -Changed incorrect "Fixes" tag to "Closes" -Rewrote the patch to use uvc->func rather than declaring video->uvc first as per Xu Yang's comment --- drivers/usb/gadget/function/uvc_video.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/usb/gadget/function/uvc_video.c b/drivers/usb/gadget/function/uvc_video.c index 2f9700b3f1b6..9ba09118bb74 100644 --- a/drivers/usb/gadget/function/uvc_video.c +++ b/drivers/usb/gadget/function/uvc_video.c @@ -821,7 +821,7 @@ int uvcg_video_init(struct uvc_video *video, struct uvc_device *uvc) /* Allocate a kthread for asynchronous hw submit handler. */ video->kworker = kthread_run_worker(0, "UVCG"); if (IS_ERR(video->kworker)) { - uvcg_err(&video->uvc->func, "failed to create UVCG kworker\n"); + uvcg_err(&uvc->func, "failed to create UVCG kworker\n"); return PTR_ERR(video->kworker); } -- 2.55.0