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=1793828884; b=2WCW70k9SCrrOqyBLNp/J1K10kDaKulstlNNIr4gk/YAwqhqBSREcfOJUckm00cuz/oU kcwRxgWCW17Ik/IW1ByT//mIb8HQ/J6zCGJCOJTjwkvNrLr0Jo24W3Wx+lFZHTk4OMOfw yBSxpZ3th93VfKBJlH6ZHlegbav4/5pp5KOK6WstQKdHGRxOhiQD6siY0PLX4qc0d6NbB S0wU1r+XHYc+3DV7Ywg7vyu92zF6xzoHKbr/e1AbBVKLPFQMICrcfqoVRWD5cU7T/x0ZG q6eHpezsZzNK//+pOj0u/tmYxzbFC374QmKNDugoTGdUE7CJsyVlQJt393wXRjTsbHw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793828884; 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=wz2rA6Mb9t7Z3Bfmg9PBc2KasB39JfiOed+/Ys9cxPc=; b=pEQU7UYax+V0OekIV2O5leaQnfjpg3Fi14lUQQXa8bqnjvgyA+KzswpEm8P6Ew+eG/D+ P8mjaJKY48DLahZjtHwPTSxuXz8SbOp4tFknn00FAGYcHHvTThhZUBJi+vzQ7Sdk5Tdpn CLT8V6dlH8D6DqVVF8rlftuV0zSKGiF9u2hLl4N95WS7wdu74LSwNzIah4JsWgq5a4LLW OuUHkCd4E/gCJlKEO6PNuI0+8KP3dzh8RAc6tC8ZgHeXGVcgPFcAzw6cFfC8opilhVnSv aWzL+5XKmcGlCuOSjwK73rX13xdMlByETaE/BSmpoFb2ksTBmIfFtclu96/hYdvlX+g== 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=x3DDITzv; 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 500C4607030F; Wed, 4 Nov 2026 21:48:04 +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=x3DDITzv Received: by smtp.kernel.org (Postfix) with ESMTPSA id DCE441F0093A; Wed, 4 Nov 2026 21:48:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793828884; bh=wz2rA6Mb9t7Z3Bfmg9PBc2KasB39JfiOed+/Ys9cxPc=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=x3DDITzvBbbP4Xxk4p0jBuhQz+3k8Z7KHc9UYns87m8gwc6t22eJn+ZwQWPR77kKG qU1B7EGG8rfBLrRIfJC0K/Q5dR2X4foO9BNE9lgR+YjVDWQSj/jsntSYtGb0D/JWiF Ohsmv+fkBwbNZEsUsh0h3pJcUTh3S0qCDNV/wrbk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sean Young , Hans Verkuil Subject: [PATCH 7.3 265/547] media: rc: Fix race between bpf(BPG_PROG_ATTACH) and device unregister Date: Wed, 4 Nov 2026 16:07:29 -0500 Message-ID: <20261104211045.718582882@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261104211038.406938024@linuxfoundation.org> References: <20261104211038.406938024@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 7.3-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); /*