From patchwork Fri Oct 4 23:04:09 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aaron Thompson X-Patchwork-Id: 13823070 Received: from smtp-out1.aaront.org (smtp-out1.aaront.org [52.0.59.53]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5D34314BF8A; Fri, 4 Oct 2024 23:04:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=52.0.59.53 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728083097; cv=none; b=i2gkwGtOfM22k52fMczsHYrx8ARI40PckdT/KS1KKCuw+cwxz6dWLb9M4bk0qz/N/3XXA232DTfi3DK3rKmz0L5yDN/xaqvReRuKmeNkLavZ0yuQ7MJcjdeL0hPKcQnkgAUHSRWvnas5y4H7V7XgclpwZCtlTtj2icdks6oXYF4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728083097; c=relaxed/simple; bh=gjC0Th+4DQx0Zl7m12gapSe4WeazmpHFL5sYGpiCjZk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=GiR1tVbJlIqwg8rDlAS1t6pjjgUv0R4X0vMUVg/hZ91iQjk8hnZdb5tPaoRsZh5hodCAStJqXyuulWjX+Bv3X+O/tlGIyQMoeiU6pGFnAoyVLlRTmtzwcVmmPZiGU57QWJ80CDLWjFQc8FboSMSOdcClTp9souBpcMuHtpZoC/A= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=aaront.org; spf=pass smtp.mailfrom=aaront.org; dkim=permerror (0-bit key) header.d=aaront.org header.i=@aaront.org header.b=cAeDnDBp; dkim=pass (2048-bit key) header.d=aaront.org header.i=@aaront.org header.b=pV+KgAow; arc=none smtp.client-ip=52.0.59.53 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=aaront.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=aaront.org Authentication-Results: smtp.subspace.kernel.org; dkim=permerror (0-bit key) header.d=aaront.org header.i=@aaront.org header.b="cAeDnDBp"; dkim=pass (2048-bit key) header.d=aaront.org header.i=@aaront.org header.b="pV+KgAow" Received: by smtp-out1.aaront.org (Postfix) with ESMTP id 4XL3zB3lbjzhb; Fri, 4 Oct 2024 23:04:54 +0000 (UTC) DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/simple; d=aaront.org; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=habm2wya2ukbsdan; bh= gjC0Th+4DQx0Zl7m12gapSe4WeazmpHFL5sYGpiCjZk=; b=cAeDnDBpMkfdvdJI yoDHF7j8Up7w/R6ugfnzyBzwmG+PsF677z4I1g3qauQNzPfKMS8FbkH9tWgLVDia ls5uDQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=aaront.org; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=qkjur4vrxk6kmqfk; bh= gjC0Th+4DQx0Zl7m12gapSe4WeazmpHFL5sYGpiCjZk=; b=pV+KgAowrzgf2CKI t6svpSLdxP7uXpmy89/xmyBg2tVG3zMxPq0N0NaeaFL81JIgrtuuJ3wqOdwfHOQ0 N70P97RbaVnGysIsP3tExLOtsSRwdIyvNLDabU8Sxo87Mmk+iwD050AO6kMANMfE YJLffECp75vww5ZmB74s0kPSfW1WhHIjKFK9KLtjYZu569GwjyFNFtrDVW1OsU6S I2aw9l7ayGx+7aulYj//ZqB6mO2erC3HfLh9/+9TSKSOIkhNwqEBH0qxyFjANgok SUBDXxJfgaa5kuN0bDRrxu8t54tqZYNU7YCn73WfV/n6yVVSRPj2cg00bSs+ZJ/w /wNjUQ== From: Aaron Thompson To: Johan Hedberg , Luiz Augusto von Dentz , Marcel Holtmann , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org Cc: stable@vger.kernel.org, Aaron Thompson Subject: [PATCH v2 2/3] Bluetooth: Call iso_exit() on module unload Date: Fri, 4 Oct 2024 23:04:09 +0000 Message-Id: <20241004230410.299824-3-dev@aaront.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241004230410.299824-1-dev@aaront.org> References: <20241004230410.299824-1-dev@aaront.org> Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Aaron Thompson If iso_init() has been called, iso_exit() must be called on module unload. Without that, the struct proto that iso_init() registered with proto_register() becomes invalid, which could cause unpredictable problems later. In my case, with CONFIG_LIST_HARDENED and CONFIG_BUG_ON_DATA_CORRUPTION enabled, loading the module again usually triggers this BUG(): list_add corruption. next->prev should be prev (ffffffffb5355fd0), but was 0000000000000068. (next=ffffffffc0a010d0). ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:29! Oops: invalid opcode: 0000 [#1] PREEMPT SMP PTI CPU: 1 PID: 4159 Comm: modprobe Not tainted 6.10.11-4+bt2-ao-desktop #1 RIP: 0010:__list_add_valid_or_report+0x61/0xa0 ... __list_add_valid_or_report+0x61/0xa0 proto_register+0x299/0x320 hci_sock_init+0x16/0xc0 [bluetooth] bt_init+0x68/0xd0 [bluetooth] __pfx_bt_init+0x10/0x10 [bluetooth] do_one_initcall+0x80/0x2f0 do_init_module+0x8b/0x230 __do_sys_init_module+0x15f/0x190 do_syscall_64+0x68/0x110 ... Cc: stable@vger.kernel.org Fixes: ccf74f2390d6 ("Bluetooth: Add BTPROTO_ISO socket type") Signed-off-by: Aaron Thompson --- net/bluetooth/af_bluetooth.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c index 67604ccec2f4..9425d0680844 100644 --- a/net/bluetooth/af_bluetooth.c +++ b/net/bluetooth/af_bluetooth.c @@ -830,6 +830,8 @@ static int __init bt_init(void) static void __exit bt_exit(void) { + iso_exit(); + mgmt_exit(); sco_exit();