From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 8F1E71527AC; Fri, 6 Dec 2024 15:13:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733497980; cv=none; b=VCfzkR0jMLQHoOdXqeStl/1tmo94DZBtxy8U4E8mk6uwyIf00fzR1EIa0bl+A3gfuE7na7E7BbGu1lZpvXi2nzDk4/rHu0w6LIWBpCU5Zyzjo5kOE7X2r0CZLk4QPV0/qOFhsR+wCK2dNcuxLnkeBZ8Ni6+SQLJIZ4Ru7D25ws0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733497980; c=relaxed/simple; bh=VybsjURAtdYNMKCSXiYnOyu2bfvyiRQ20LfVn2+TiA0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=YjTO/SZd6PUvrkYs4PcmjZGuQeRupzI3Jhe2FjB4aiouLZuwvYO62vTc5GaONKjoMKIANBn90ibQ6VNHjbnJCN6syYqrlhRwq8/fR8H2dXo/naNmc4L2oqZIDX1n3u8FZbeMxNoeAmLdgRbZADqqm1uhsyuQLcwZ/kfM+u0QGmo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dQoDxonL; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="dQoDxonL" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 14FA2C4CED1; Fri, 6 Dec 2024 15:12:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1733497980; bh=VybsjURAtdYNMKCSXiYnOyu2bfvyiRQ20LfVn2+TiA0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dQoDxonLTKk/5RokWADVLJ9KPDOVCVY+OFkxRRRE46G1VH5m0cj4eekkIXHr5SDC2 Fb7JIL+LjjMBLoauBAqAeI/p9PG6EI1/i8TnL2xKEVFLxLvJpu5CPSaz6URtlz+gYR SaO0hhm41eVCfNbYeN7c4a83jjYahMTI/6opS/0M= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+03d6270b6425df1605bf@syzkaller.appspotmail.com, Luiz Augusto von Dentz , Sasha Levin Subject: [PATCH 6.6 419/676] Bluetooth: MGMT: Fix slab-use-after-free Read in set_powered_sync Date: Fri, 6 Dec 2024 15:33:58 +0100 Message-ID: <20241206143709.715122556@linuxfoundation.org> X-Mailer: git-send-email 2.47.1 In-Reply-To: <20241206143653.344873888@linuxfoundation.org> References: <20241206143653.344873888@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Luiz Augusto von Dentz [ Upstream commit 0b882940665ca2849386ee459d4331aa2f8c4e7d ] This fixes the following crash: ================================================================== BUG: KASAN: slab-use-after-free in set_powered_sync+0x3a/0xc0 net/bluetooth/mgmt.c:1353 Read of size 8 at addr ffff888029b4dd18 by task kworker/u9:0/54 CPU: 1 UID: 0 PID: 54 Comm: kworker/u9:0 Not tainted 6.11.0-rc6-syzkaller-01155-gf723224742fc #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: hci0 hci_cmd_sync_work Call Trace: __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 q kasan_report+0x143/0x180 mm/kasan/report.c:601 set_powered_sync+0x3a/0xc0 net/bluetooth/mgmt.c:1353 hci_cmd_sync_work+0x22b/0x400 net/bluetooth/hci_sync.c:328 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd10 kernel/workqueue.c:3389 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Allocated by task 5247: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __kmalloc_cache_noprof+0x19c/0x2c0 mm/slub.c:4193 kmalloc_noprof include/linux/slab.h:681 [inline] kzalloc_noprof include/linux/slab.h:807 [inline] mgmt_pending_new+0x65/0x250 net/bluetooth/mgmt_util.c:269 mgmt_pending_add+0x36/0x120 net/bluetooth/mgmt_util.c:296 set_powered+0x3cd/0x5e0 net/bluetooth/mgmt.c:1394 hci_mgmt_cmd+0xc47/0x11d0 net/bluetooth/hci_sock.c:1712 hci_sock_sendmsg+0x7b8/0x11c0 net/bluetooth/hci_sock.c:1832 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 sock_write_iter+0x2dd/0x400 net/socket.c:1160 new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa72/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5246: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2256 [inline] slab_free mm/slub.c:4477 [inline] kfree+0x149/0x360 mm/slub.c:4598 settings_rsp+0x2bc/0x390 net/bluetooth/mgmt.c:1443 mgmt_pending_foreach+0xd1/0x130 net/bluetooth/mgmt_util.c:259 __mgmt_power_off+0x112/0x420 net/bluetooth/mgmt.c:9455 hci_dev_close_sync+0x665/0x11a0 net/bluetooth/hci_sync.c:5191 hci_dev_do_close net/bluetooth/hci_core.c:483 [inline] hci_dev_close+0x112/0x210 net/bluetooth/hci_core.c:508 sock_do_ioctl+0x158/0x460 net/socket.c:1222 sock_ioctl+0x629/0x8e0 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83gv entry_SYSCALL_64_after_hwframe+0x77/0x7f Reported-by: syzbot+03d6270b6425df1605bf@syzkaller.appspotmail.com Tested-by: syzbot+03d6270b6425df1605bf@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=03d6270b6425df1605bf Fixes: 275f3f648702 ("Bluetooth: Fix not checking MGMT cmd pending queue") Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Sasha Levin --- net/bluetooth/mgmt.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c index 1f3a39c20a911..f84912552d294 100644 --- a/net/bluetooth/mgmt.c +++ b/net/bluetooth/mgmt.c @@ -1318,7 +1318,8 @@ static void mgmt_set_powered_complete(struct hci_dev *hdev, void *data, int err) struct mgmt_mode *cp; /* Make sure cmd still outstanding. */ - if (cmd != pending_find(MGMT_OP_SET_POWERED, hdev)) + if (err == -ECANCELED || + cmd != pending_find(MGMT_OP_SET_POWERED, hdev)) return; cp = cmd->param; @@ -1351,7 +1352,13 @@ static void mgmt_set_powered_complete(struct hci_dev *hdev, void *data, int err) static int set_powered_sync(struct hci_dev *hdev, void *data) { struct mgmt_pending_cmd *cmd = data; - struct mgmt_mode *cp = cmd->param; + struct mgmt_mode *cp; + + /* Make sure cmd still outstanding. */ + if (cmd != pending_find(MGMT_OP_SET_POWERED, hdev)) + return -ECANCELED; + + cp = cmd->param; BT_DBG("%s", hdev->name); -- 2.43.0