From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793831510; b=oHf5e2RVRgU98j6HQOLkkaIeexa3Ltov60y4ttB8fqSA/H41gswW3tvDmsu6170ln0Q8 3PsOyG2z5NLpr/KUVcdtUAlcnL7dRH8Koed/mAOiiwDw3eFyOa+qHGRV4UJI5xapcKSPx IpdxUSuHqNwJIikawe33HFvsWOrlD/2ji7IMjA869DjnANywzmSsSbk9MbfxiljK2QDFc Xj4w/xH6Yuw44ORqr55V81QfTUGUAYIRdoLWzIy9J8BJBTJ9WKgLyER1sQKXpJR3cCtot lwlCo1DBq5CfppAWU0L5e32BqrRN6D92xXalCF/oWxphA/LsBWelABAU6bUCTVcAi3Q== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793831510; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=wlbkXZg8ilbwzJu23nPNra8CU0T/P71CUCe283mr4w8=; b=A+8fqYKY0ayfOpFla4l79PD6k3qu4wtEJRjNl7SohuWd51tE/qTpBMw8MsI49oyWr2KY c5HK2tiHRyBlMtlQKxDkV/Et7uts5dyrpJ7jcfXObM8pCj65BtpgJqSL7fUNk0kfG+A2Q EAed4HaSEOLPWAZESsl3MZ0Hm12zGEUbYK8fALDh27sa0e1eUTo+hbuaDfJ3a+JFw/NR7 MW87PACOmCig3lLKbnHbDAc6SC4IRGSjDMWhGnPELLrqepcr0mutw3y8+iQZ6t4PiDefH nvODH3WfvL0yJWhFDX9KPV2JEcQXmyGZejEOdii9w/SqOFGeE94tJGCY0FMhWvacfnA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=Ty6vedfa; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0E5AB606A33A; Wed, 4 Nov 2026 22:31:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=Ty6vedfa Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9C1C81F00919; Wed, 4 Nov 2026 22:31:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793831509; bh=wlbkXZg8ilbwzJu23nPNra8CU0T/P71CUCe283mr4w8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Ty6vedfarOtIKerMo04rgkBu784AF/gGIiCmfoxN2cSxZiPxlVQrJ/5ATwvdJ1BbK Lf5JLZ+EL2p5WCW2dTMq/lJoXfxgDTKrbCv9IVkopezB/fHKLheTYOgOINq7uduHwc IJ2ZWIo3a3ta5pcbglsnLcEV6gvwS73lSZrusfCM= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sean Young , Hans Verkuil Subject: [PATCH 6.18 0746/1005] media: rc: Fix race between bpf(BPG_PROG_ATTACH) and device unregister Date: Wed, 4 Nov 2026 16:07:59 -0500 Message-ID: <20261104211104.361991605@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261104211043.516122098@linuxfoundation.org> References: <20261104211043.516122098@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sean Young commit b3f5daf3222999d3f92f606a4eb5e35ab90fd0e4 upstream. Mark the device as unregistered before tearing down raw IR/bpf state, so that racing bpf(BPF_PROG_{ATTACH,DETACH,QUERY}) calls cannot slip in between ir_raw_event_unregister() completing and dev->registered being cleared. Fixes: dccc0c3ddf8f ("media: rc: fix race between unregister and urb/irq callbacks") Signed-off-by: Sean Young Cc: stable@vger.kernel.org Acked-by: Hans Verkuil Signed-off-by: Greg Kroah-Hartman --- drivers/media/rc/rc-main.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) --- a/drivers/media/rc/rc-main.c +++ b/drivers/media/rc/rc-main.c @@ -2026,18 +2026,18 @@ void rc_unregister_device(struct rc_dev if (!dev) return; + mutex_lock(&dev->lock); + dev->registered = false; + if (dev->users && dev->close) + dev->close(dev); + mutex_unlock(&dev->lock); + if (dev->driver_type == RC_DRIVER_IR_RAW) ir_raw_event_unregister(dev); timer_delete_sync(&dev->timer_keyup); timer_delete_sync(&dev->timer_repeat); - mutex_lock(&dev->lock); - if (dev->users && dev->close) - dev->close(dev); - dev->registered = false; - mutex_unlock(&dev->lock); - rc_free_rx_device(dev); /*