linux-kernel - [syzbot] [bluetooth?] WARNING in hci_send

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Message-ID: <000000000000742ab106112cdcbe@google.com>
Date: Mon, 12 Feb 2024 02:37:15 -0800
From: syzbot <syzbot+c39f6e731d27b028df97@...kaller.appspotmail.com>
To: johan.hedberg@...il.com, linux-bluetooth@...r.kernel.org, 
	linux-kernel@...r.kernel.org, luiz.dentz@...il.com, marcel@...tmann.org, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [bluetooth?] WARNING in hci_send_cmd

Hello,

syzbot found the following issue on:

HEAD commit:    e6f39a90de92 Merge tag 'efi-fixes-for-v6.8-1' of git://git..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=157751e0180000
kernel config:  https://syzkaller.appspot.com/x/.config?x=31f74f10f14dec54
dashboard link: https://syzkaller.appspot.com/bug?extid=c39f6e731d27b028df97
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/663081ccfa7b/disk-e6f39a90.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/47bbf72bfafe/vmlinux-e6f39a90.xz
kernel image: https://storage.googleapis.com/syzbot-assets/982bd4f4331d/bzImage-e6f39a90.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c39f6e731d27b028df97@...kaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 0 PID: 11256 at kernel/workqueue.c:1728 __queue_work+0xdc6/0x11d0 kernel/workqueue.c:1727
Modules linked in:
CPU: 0 PID: 11256 Comm: syz-executor.2 Not tainted 6.8.0-rc3-syzkaller-00215-ge6f39a90de92 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:__queue_work+0xdc6/0x11d0 kernel/workqueue.c:1727
Code: 07 83 c0 03 38 d0 7c 09 84 d2 74 05 e8 d3 31 8d 00 8b 5b 2c 31 ff 83 e3 20 89 de e8 84 7c 33 00 85 db 75 56 e8 9b 81 33 00 90 <0f> 0b 90 e9 ac f8 ff ff e8 8d 81 33 00 90 0f 0b 90 e9 5b f8 ff ff
RSP: 0018:ffffc9000bec7a20 EFLAGS: 00010087
RAX: 000000000000282e RBX: 0000000000000000 RCX: ffffc90009c6e000
RDX: 0000000000040000 RSI: ffffffff8158e825 RDI: 0000000000000005
RBP: 0000000000000200 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff8880418bcda8
R13: 0000000000000000 R14: ffff88807f8b9c00 R15: ffff88807f8b9c00
FS:  00007f1069ea96c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000040 CR3: 00000000776c8000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 queue_work_on+0xf4/0x120 kernel/workqueue.c:1837
 queue_work include/linux/workqueue.h:548 [inline]
 hci_send_cmd+0xcb/0x1b0 net/bluetooth/hci_core.c:3072
 hci_acl_create_connection+0x426/0x5d0 net/bluetooth/hci_conn.c:237
 hci_connect_acl+0x3e3/0x700 net/bluetooth/hci_conn.c:1706
 l2cap_chan_connect+0x724/0x2180 net/bluetooth/l2cap_core.c:8054
 l2cap_sock_connect+0x33f/0x720 net/bluetooth/l2cap_sock.c:256
 __sys_connect_file+0x162/0x1a0 net/socket.c:2048
 __sys_connect+0x149/0x170 net/socket.c:2065
 __do_sys_connect net/socket.c:2075 [inline]
 __se_sys_connect net/socket.c:2072 [inline]
 __x64_sys_connect+0x72/0xb0 net/socket.c:2072
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xd8/0x270 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f106907dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f1069ea90c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 00007f10691abf80 RCX: 00007f106907dda9
RDX: 000000000000000e RSI: 0000000020000040 RDI: 0000000000000004
RBP: 00007f10690ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f10691abf80 R15: 00007ffcf75228b8
 </TASK>


---
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