From nobody Thu Nov 28 04:54:30 2024 Received: from smtp-out0.aaront.org (smtp-out0.aaront.org [52.10.12.108]) (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 80BBC367; Fri, 4 Oct 2024 00:38:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=52.10.12.108 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728002305; cv=none; b=PtdZ5uLM9F5dXRxCCHRZCo6QUfivlpRBskTrvHhpoo87UBHeCqIt3lmDmlLnBTlHKCui9SMUdqZCShbFHUV/01dsCJzdcw9L1U4bLMiPDQExSiCecgbgs+mfli960tZWRHFm4XHhnMw7Kuvo1CD0S08QU+jom0z1eWKW6MoQMvI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728002305; c=relaxed/simple; bh=hSwY89Dc3i1dwP9dfCASLPDb2ZwIGzu1zOA5C3dVPm4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=TLdWIF4H6kKuiAg8cZO5zba3n3CDcNaivhgj3t4qYhmRqyhS1O5+HU+VtXlJDs5F7FMZj2PsquV4WugjZBY5rsAmM2iJXxhbZW78pgXiFdvCyuUutseYbSVj/SELUSAzRqK0/g9cNVwpr85nhJkawkZdTsZXZW8IwEHEED0vrdQ= 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=RWAAjeav; dkim=pass (2048-bit key) header.d=aaront.org header.i=@aaront.org header.b=kC8YF6Zk; arc=none smtp.client-ip=52.10.12.108 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="RWAAjeav"; dkim=pass (2048-bit key) header.d=aaront.org header.i=@aaront.org header.b="kC8YF6Zk" Received: by smtp-out0.aaront.org (Postfix) with ESMTP id 4XKTxZ22L4zRg; Fri, 4 Oct 2024 00:31:30 +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=bgzxjfijqntwovyv; bh= hSwY89Dc3i1dwP9dfCASLPDb2ZwIGzu1zOA5C3dVPm4=; b=RWAAjeavCtwtgu/L YYfaxaXpauEwv+C19RLSNHpylIDaY/q+ujLfb/VfJQItOAnHwY1FU8PwYoHX55gn 5pY4Dw== 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=elwxqanhxhag6erl; bh= hSwY89Dc3i1dwP9dfCASLPDb2ZwIGzu1zOA5C3dVPm4=; b=kC8YF6ZkacsO2Gmb M+TMravWtzrRMBHgu8tAwAg+Z/mqav5tawwlBUVf4RpgOz/z3e0bXnhpsESMhyek q8mD2axYJtzoQdQHw0swChZn1I9lHb0q2p3Z9n0yaQ50n28Ia2QTCdsVXItsAPAu P54vUA5Z74N+kq3jCiclJdLABZ6H8kCPDGuznQ0smeA9CwfN5XPyGNRQwFT5DBuk 7pgm/k4P4VgG2BRFFuPE5Buagq3wXZbhv5P+OiZG0Dc0rNs1rk7wFy0e65JAqWY3 n0dhcJbF35TypKJKP7MvpTVPrbdwZlb7DzKwaRJ+JqOcO/Qk8xt3NwiKzULg3bb6 c6fmnA== From: Aaron Thompson To: Johan Hedberg , Luiz Augusto von Dentz , Marcel Holtmann , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Aaron Thompson , stable@vger.kernel.org Subject: [PATCH 1/3] Bluetooth: ISO: Fix multiple init when debugfs is disabled Date: Fri, 4 Oct 2024 00:30:28 +0000 Message-Id: <20241004003030.160721-2-dev@aaront.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241004003030.160721-1-dev@aaront.org> References: <20241004003030.160721-1-dev@aaront.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Aaron Thompson If bt_debugfs is not created successfully, which happens if either CONFIG_DEBUG_FS or CONFIG_DEBUG_FS_ALLOW_ALL is unset, then iso_init() returns early and does not set iso_inited to true. This means that a subsequent call to iso_init() will result in duplicate calls to proto_register(), bt_sock_register(), etc. With CONFIG_LIST_HARDENED and CONFIG_BUG_ON_DATA_CORRUPTION enabled, the duplicate call to proto_register() triggers this BUG(): list_add double add: new=3Dffffffffc0b280d0, prev=3Dffffffffbab56250, next=3Dffffffffc0b280d0. ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:35! Oops: invalid opcode: 0000 [#1] PREEMPT SMP PTI CPU: 2 PID: 887 Comm: bluetoothd Not tainted 6.10.11-1-ao-desktop #1 RIP: 0010:__list_add_valid_or_report+0x9a/0xa0 ... __list_add_valid_or_report+0x9a/0xa0 proto_register+0x2b5/0x340 iso_init+0x23/0x150 [bluetooth] set_iso_socket_func+0x68/0x1b0 [bluetooth] kmem_cache_free+0x308/0x330 hci_sock_sendmsg+0x990/0x9e0 [bluetooth] __sock_sendmsg+0x7b/0x80 sock_write_iter+0x9a/0x110 do_iter_readv_writev+0x11d/0x220 vfs_writev+0x180/0x3e0 do_writev+0xca/0x100 ... This change removes the early return. The check for iso_debugfs being NULL was unnecessary, it is always NULL when iso_inited is false. Cc: stable@vger.kernel.org Fixes: ccf74f2390d6 ("Bluetooth: Add BTPROTO_ISO socket type") Signed-off-by: Aaron Thompson --- net/bluetooth/iso.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c index d5e00d0dd1a0..c9eefb43bf47 100644 --- a/net/bluetooth/iso.c +++ b/net/bluetooth/iso.c @@ -2301,13 +2301,9 @@ int iso_init(void) =20 hci_register_cb(&iso_cb); =20 - if (IS_ERR_OR_NULL(bt_debugfs)) - return 0; - - if (!iso_debugfs) { + if (!IS_ERR_OR_NULL(bt_debugfs)) iso_debugfs =3D debugfs_create_file("iso", 0444, bt_debugfs, NULL, &iso_debugfs_fops); - } =20 iso_inited =3D true; =20 --=20 2.39.5 From nobody Thu Nov 28 04:54:30 2024 Received: from smtp-out0.aaront.org (smtp-out0.aaront.org [52.10.12.108]) (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 4B1B2C8E9; Fri, 4 Oct 2024 00:31:33 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=52.10.12.108 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728001896; cv=none; b=GxX8FAGQYS3ArJMkSgkZen6z7NRWQnN4HqZtUIB5Y5pvzpT6J6CBvaRfACCs6tS/eAeF1a/YRTSRHsw/CHnjot39i9PdfRCJ4kfVwspPPlrOfZ7I1cWGs5snbJLkGaDfikHFUnGrKSjA6lWoc7WRatNA9w4FRXuJE5+OfPZCC4o= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728001896; c=relaxed/simple; bh=0pT50F1cem0hrgdH8pcqVClHyZziPHRa6KdtvkEn8No=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=ka6EabcmwmQQj4zYn7CCEiW8DNuG1RoLBNVHWqnIpJ3Y1EF088y7WB4rWN6HBPNFLNYA28APlTW5GUsvC/KOrHXAjLCWSFV/gcl0+tFBVPzYL+rxbJGuAC5j1JohdHXBdCElEl1z4coFThgP8PI4RrRogEuP1ksf8XwjAwnrFqU= 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=XDYlgl8N; dkim=pass (2048-bit key) header.d=aaront.org header.i=@aaront.org header.b=IJKRwipa; arc=none smtp.client-ip=52.10.12.108 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="XDYlgl8N"; dkim=pass (2048-bit key) header.d=aaront.org header.i=@aaront.org header.b="IJKRwipa" Received: by smtp-out0.aaront.org (Postfix) with ESMTP id 4XKTxd5CCSzRh; Fri, 4 Oct 2024 00:31:33 +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=bgzxjfijqntwovyv; bh= 0pT50F1cem0hrgdH8pcqVClHyZziPHRa6KdtvkEn8No=; b=XDYlgl8NLsNRHd96 VVSzgBMTh7igHjFSA/x1/bJIFP2n0O1qa0t+wwlnnblghgUDDANMICVPi/phcKA7 fGInCA== 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=elwxqanhxhag6erl; bh= 0pT50F1cem0hrgdH8pcqVClHyZziPHRa6KdtvkEn8No=; b=IJKRwipaASwdRJga 55eXfloxQVbfFKmxtEDqPRsrSGZOHl3aoY0lljvdcbpPczYs8mtfHXKVAp6pJ7qy j6N4OJN/OmDHm1MtASGJ4qhlk8146muetetchf652HOXs8Uqp5cupyAe4m6cX+hB AjVxS/cy3K8++dVbhSZERmPVycGYcYQ9gfkaL3BI7OkK6bTKCcHTb99g2zi0b/Xm 3JX6FpwVbFkrdQIgE5GaHY1YRkY9nzwpqI0idAyT72toFqhuDn7PLTW7Hs137waV gDQozmEp3bfeGly9GfKRAHceAYtslE2WubVJLk9Ev/d4gJbCmDINnm8+9/u4G4hM XQhTGg== From: Aaron Thompson To: Johan Hedberg , Luiz Augusto von Dentz , Marcel Holtmann , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Aaron Thompson , stable@vger.kernel.org Subject: [PATCH 2/3] Bluetooth: Call iso_exit() on module unload Date: Fri, 4 Oct 2024 00:30:29 +0000 Message-Id: <20241004003030.160721-3-dev@aaront.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241004003030.160721-1-dev@aaront.org> References: <20241004003030.160721-1-dev@aaront.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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=3Dffffffffc0a010d0). ------------[ 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/mgmt.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index e4f564d6f6fb..78a164fab3e1 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -10487,6 +10487,7 @@ int mgmt_init(void) =20 void mgmt_exit(void) { + iso_exit(); hci_mgmt_chan_unregister(&chan); } =20 --=20 2.39.5 From nobody Thu Nov 28 04:54:30 2024 Received: from smtp-out0.aaront.org (smtp-out0.aaront.org [52.10.12.108]) (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 7DB02A955; Fri, 4 Oct 2024 00:31:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=52.10.12.108 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728001899; cv=none; b=LXCPLqIpxvZZH/s28BY7pkvemPVA9Qt6by+DWlOyJ/KNUpITsPZhn/MO/R3yxfFOKy0g0V9R0MPPqgx9sgkaqpdmF9rv/RogyIZuLav4EupVZaSRwKYALadRSQu4TA+nLOnuHsU8Tvtd5qQWwHQZRJXuJVCzr+rL4gBfq0AnPlE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728001899; c=relaxed/simple; bh=f0FQOyiYq7FpaBC/Z+gvQXYwpERUJNHDeFsnskdp8kg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=cIlx4MYu1Sj/6SzQKiJOqMb0F387i3Jc5bBUHcpfzCyOQbawOx2o2c/tlyt18FMWWy7plGpEmeC6NjHdJsBbCrIjySC8cZe8XavxB1scDZgLN7m4lt4A+YlxQou80JzCFmbGYoIuEJ8OZKQ9ZPe4jGq7YNJKicFJl+g2GodOlaM= 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=BaUcvNxo; dkim=pass (2048-bit key) header.d=aaront.org header.i=@aaront.org header.b=RYzUmZTC; arc=none smtp.client-ip=52.10.12.108 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="BaUcvNxo"; dkim=pass (2048-bit key) header.d=aaront.org header.i=@aaront.org header.b="RYzUmZTC" Received: by smtp-out0.aaront.org (Postfix) with ESMTP id 4XKTxj0NhpzRj; Fri, 4 Oct 2024 00:31:37 +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=bgzxjfijqntwovyv; bh= f0FQOyiYq7FpaBC/Z+gvQXYwpERUJNHDeFsnskdp8kg=; b=BaUcvNxo9vK/8Y9J +SKv7rgse3m3vjeAeGt0M451L15SmSrzYNnmkHl9RIZykMapV2JCcxUbDJpverVh HBEwAA== 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=elwxqanhxhag6erl; bh= f0FQOyiYq7FpaBC/Z+gvQXYwpERUJNHDeFsnskdp8kg=; b=RYzUmZTCxYVdJUAq FDkVjIAy2EyvrYyJgzVF3xozkaeMgRKz6Ht4J/hHAqQ3l4dRPKKZQM0phu011sU8 YZuYBNCSahCg9yR6l1zQNTfbW/ojBR2IrATVS6b9dqR4bNRb7RIw5SJREASVWcFo ho1Lc3dP0kELPM04St0kpAZuwuQwM8P/wvas85DFp+VNEEPY2Z1GZKwlxKXo+ytr 0FACIeLA2VL+gU+oZr1sHQdwC3puUGDQ3G2Nyvp1CmoBgRQh4wG/0+IG4whKNte6 FC77CRtDVyfvKmWJKMn9KBxtLlhKpHfsY0MbbuFfh8L+HN7XDKnl+z2PrJSx6SlQ mQryWA== From: Aaron Thompson To: Johan Hedberg , Luiz Augusto von Dentz , Marcel Holtmann , linux-bluetooth@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Aaron Thompson , stable@vger.kernel.org Subject: [PATCH 3/3] Bluetooth: Remove debugfs directory on module init failure Date: Fri, 4 Oct 2024 00:30:30 +0000 Message-Id: <20241004003030.160721-4-dev@aaront.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20241004003030.160721-1-dev@aaront.org> References: <20241004003030.160721-1-dev@aaront.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Aaron Thompson If bt_init() fails, the debugfs directory currently is not removed. If the module is loaded again after that, the debugfs directory is not set up properly due to the existing directory. # modprobe bluetooth # ls -laF /sys/kernel/debug/bluetooth total 0 drwxr-xr-x 2 root root 0 Sep 27 14:26 ./ drwx------ 31 root root 0 Sep 27 14:25 ../ -r--r--r-- 1 root root 0 Sep 27 14:26 l2cap -r--r--r-- 1 root root 0 Sep 27 14:26 sco # modprobe -r bluetooth # ls -laF /sys/kernel/debug/bluetooth ls: cannot access '/sys/kernel/debug/bluetooth': No such file or directory # # modprobe bluetooth modprobe: ERROR: could not insert 'bluetooth': Invalid argument # dmesg | tail -n 6 Bluetooth: Core ver 2.22 NET: Registered PF_BLUETOOTH protocol family Bluetooth: HCI device and connection manager initialized Bluetooth: HCI socket layer initialized Bluetooth: Faking l2cap_init() failure for testing NET: Unregistered PF_BLUETOOTH protocol family # ls -laF /sys/kernel/debug/bluetooth total 0 drwxr-xr-x 2 root root 0 Sep 27 14:31 ./ drwx------ 31 root root 0 Sep 27 14:26 ../ # # modprobe bluetooth # dmesg | tail -n 7 Bluetooth: Core ver 2.22 debugfs: Directory 'bluetooth' with parent '/' already present! NET: Registered PF_BLUETOOTH protocol family Bluetooth: HCI device and connection manager initialized Bluetooth: HCI socket layer initialized Bluetooth: L2CAP socket layer initialized Bluetooth: SCO socket layer initialized # ls -laF /sys/kernel/debug/bluetooth total 0 drwxr-xr-x 2 root root 0 Sep 27 14:31 ./ drwx------ 31 root root 0 Sep 27 14:26 ../ # Cc: stable@vger.kernel.org Fixes: ffcecac6a738 ("Bluetooth: Create root debugfs directory during modul= e init") Signed-off-by: Aaron Thompson --- net/bluetooth/af_bluetooth.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/bluetooth/af_bluetooth.c b/net/bluetooth/af_bluetooth.c index 67604ccec2f4..0d4b171b939a 100644 --- a/net/bluetooth/af_bluetooth.c +++ b/net/bluetooth/af_bluetooth.c @@ -825,6 +825,7 @@ static int __init bt_init(void) bt_sysfs_cleanup(); cleanup_led: bt_leds_cleanup(); + debugfs_remove_recursive(bt_debugfs); return err; } =20 --=20 2.39.5