syzbot


possible deadlock in rfcomm_sk_state_change

Status: upstream: reported C repro on 2021/09/13 05:15
Reported-by: syzbot+d7ce59b06b3eb14fd218@syzkaller.appspotmail.com
First crash: 384d, last: 8h57m

Cause bisection: introduced by (bisect log) :
commit 1804fdf6e494e5e2938c65d8391690b59bcff897
Author: Tedd Ho-Jeong An <tedd.an@intel.com>
Date: Thu Aug 5 00:32:19 2021 +0000

  Bluetooth: btintel: Combine setting up MSFT extension

Crash: BUG: sleeping function called from invalid context in stack_depot_save (log)
Repro: C syz .config
Patch testing requests:
Created Duration User Patch Repo Result
2021/10/10 13:34 11m phind.uet@gmail.com linux-next report log
2021/10/10 13:32 11m phind.uet@gmail.com linux-next report log

Sample crash report:
============================================
WARNING: possible recursive locking detected
6.0.0-rc5-syzkaller-00094-ga335366bad13 #0 Not tainted
--------------------------------------------
syz-executor417/3619 is trying to acquire lock:
ffff888076423130 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1712 [inline]
ffff888076423130 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: rfcomm_sk_state_change+0x69/0x3a0 net/bluetooth/rfcomm/sock.c:73

but task is already holding lock:
ffff888076423130 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1712 [inline]
ffff888076423130 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: rfcomm_sock_shutdown+0x52/0x210 net/bluetooth/rfcomm/sock.c:902

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM);
  lock(sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by syz-executor417/3619:
 #0: ffff88806c2498d0 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
 #0: ffff88806c2498d0 (&sb->s_type->i_mutex_key#10){+.+.}-{3:3}, at: __sock_release+0x86/0x280 net/socket.c:649
 #1: ffff888076423130 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1712 [inline]
 #1: ffff888076423130 (sk_lock-AF_BLUETOOTH-BTPROTO_RFCOMM){+.+.}-{0:0}, at: rfcomm_sock_shutdown+0x52/0x210 net/bluetooth/rfcomm/sock.c:902
 #2: ffffffff8d9f4a48 (rfcomm_mutex){+.+.}-{3:3}, at: rfcomm_dlc_close+0x2f/0x240 net/bluetooth/rfcomm/core.c:507
 #3: ffff888076422128 (&d->lock){+.+.}-{3:3}, at: __rfcomm_dlc_close+0x15d/0x890 net/bluetooth/rfcomm/core.c:487

stack backtrace:
CPU: 0 PID: 3619 Comm: syz-executor417 Not tainted 6.0.0-rc5-syzkaller-00094-ga335366bad13 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_deadlock_bug kernel/locking/lockdep.c:2988 [inline]
 check_deadlock kernel/locking/lockdep.c:3031 [inline]
 validate_chain kernel/locking/lockdep.c:3816 [inline]
 __lock_acquire.cold+0x116/0x3a7 kernel/locking/lockdep.c:5053
 lock_acquire kernel/locking/lockdep.c:5666 [inline]
 lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631
 lock_sock_nested+0x36/0xf0 net/core/sock.c:3393
 lock_sock include/net/sock.h:1712 [inline]
 rfcomm_sk_state_change+0x69/0x3a0 net/bluetooth/rfcomm/sock.c:73
 __rfcomm_dlc_close+0x1b1/0x890 net/bluetooth/rfcomm/core.c:489
 rfcomm_dlc_close+0x1e5/0x240 net/bluetooth/rfcomm/core.c:520
 __rfcomm_sock_close+0x13c/0x250 net/bluetooth/rfcomm/sock.c:220
 rfcomm_sock_shutdown+0xcc/0x210 net/bluetooth/rfcomm/sock.c:905
 rfcomm_sock_release+0x64/0x140 net/bluetooth/rfcomm/sock.c:925
 __sock_release+0xcd/0x280 net/socket.c:650
 sock_close+0x18/0x20 net/socket.c:1365
 __fput+0x277/0x9d0 fs/file_table.c:320
 task_work_run+0xdd/0x1a0 kernel/task_work.c:177
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xad5/0x29b0 kernel/exit.c:795
 do_group_exit+0xd2/0x2f0 kernel/exit.c:925
 get_signal+0x238c/0x2610 kernel/signal.c:2857
 arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
 exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
 exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6679f86c09
Code: Unable to access opcode bytes at RIP 0x7f6679f86bdf.
RSP: 002b:00007ffc21cd91f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007f6679f86c09
RDX: 000000000000000a RSI: 0000000020000000 RDI: 0000000000000003
RBP: 0000000000000003 R08: 000000ff21cd9228 R09: 000000ff21cd9228
R10: 000000ff21cd9228 R11: 0000000000000246 R12: 00005555566c12b8
R13: 0000000000000000 R14: 00007ffc21cd9260 R15: 0000000000000003
 </TASK>

Crashes (4405):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2022/09/18 15:12 upstream a335366bad13 dd9a85ff .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2022/08/21 08:59 upstream 15b3f48a4339 26a13b38 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/07/24 00:54 upstream 70664fc10c0d 22343af4 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/07/06 16:33 upstream e35e5b6f695d bff65f44 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-root 2022/07/04 18:08 upstream 88084a3df167 bff65f44 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/07/01 05:13 upstream 1a0e93df1e10 1434eec0 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/06/26 21:41 upstream 0840a7914caa a371c43c .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2022/06/23 04:41 upstream 3abc3ae553c7 912f5df7 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/06/17 10:12 upstream 47700948a4ab 1719ee24 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/06/15 11:12 upstream 018ab4fabddd 127d1faf .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2022/06/01 21:19 upstream 700170bf6b4d 3666edfe .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2022/05/25 18:16 upstream fdaf9a5840ac 647c0e27 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/20 12:26 upstream b015dcd62b86 cb1ac2e7 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/20 05:32 upstream b015dcd62b86 cb1ac2e7 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/18 10:51 upstream 210e04ff7681 744a39e2 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/17 21:05 upstream 42226c989789 744a39e2 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/17 18:58 upstream 42226c989789 744a39e2 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/17 17:45 upstream 42226c989789 744a39e2 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/17 12:32 upstream 42226c989789 744a39e2 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2022/05/17 09:56 upstream 42226c989789 744a39e2 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/15 08:16 upstream 2fe1020d73ca 744a39e2 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/13 19:52 upstream f3f19f939c11 107f6434 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/13 18:50 upstream f3f19f939c11 107f6434 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/13 00:04 upstream 0ac824f379fb 9ad6612a .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-root 2022/05/12 07:42 upstream feb9c5e19e91 beb0b407 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/11 13:22 upstream feb9c5e19e91 8d7b3b67 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/11 11:35 upstream feb9c5e19e91 8d7b3b67 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/11 09:00 upstream feb9c5e19e91 8d7b3b67 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/11 07:54 upstream feb9c5e19e91 8d7b3b67 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/11 05:52 upstream feb9c5e19e91 8d7b3b67 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/11 03:11 upstream feb9c5e19e91 8d7b3b67 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/10 10:57 upstream 9be9ed2612b5 8b277b8e .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/05/10 08:07 upstream 9be9ed2612b5 8b277b8e .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2022/04/28 07:14 upstream 8f4dd16603ce 8a1f1f07 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2022/04/27 06:52 upstream cf424ef014ac 1fa34c1b .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2021/09/09 20:55 upstream a3fa7a101dcf e2776ee4 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-linux-next-kasan-gce-root 2022/08/11 09:52 linux-next 6c8f479764eb a6201f11 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-linux-next-kasan-gce-root 2022/06/23 19:43 linux-next 08897940f458 912f5df7 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-linux-next-kasan-gce-root 2022/05/28 02:46 linux-next d3fde8ff50ab a46af346 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-linux-next-kasan-gce-root 2022/05/20 12:29 linux-next 3f7bdc402fb0 cb1ac2e7 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-linux-next-kasan-gce-root 2022/05/15 22:34 linux-next 1e1b28b936ae 744a39e2 .config log report syz C possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-root 2022/09/28 05:58 upstream 46452d3786a8 75c78242 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2022/09/26 12:52 upstream f76349cf4145 d59ba983 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/09/26 11:37 upstream f76349cf4145 d59ba983 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/09/24 13:55 upstream a63f2e7cb110 0042f2b4 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-root 2022/09/24 12:43 upstream a63f2e7cb110 0042f2b4 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-root 2022/09/23 08:24 upstream bf682942cd26 0042f2b4 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-root 2022/09/22 13:04 upstream dc164f4fb00a 60af5050 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-root 2022/09/17 13:35 upstream a335366bad13 dd9a85ff .config log report info possible deadlock in rfcomm_sk_state_change
ci-qemu-upstream 2022/09/17 08:05 upstream a335366bad13 dd9a85ff .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2022/09/16 21:31 upstream 6879c2d3b960 dd9a85ff .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/09/16 10:13 upstream 3245cb65fd91 dd9a85ff .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-root 2022/09/13 23:44 upstream d1221cea11fc b884348d .config log report info possible deadlock in rfcomm_sk_state_change
ci-qemu-upstream 2022/09/10 09:52 upstream ce888220d5c7 356d8217 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-selinux-root 2022/09/08 18:46 upstream 26b1224903b3 f3027468 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-smack-root 2022/09/08 14:31 upstream 26b1224903b3 f3027468 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-kasan-gce-root 2021/09/09 05:05 upstream 730bf31b8fc8 e2776ee4 .config log report info possible deadlock in rfcomm_sk_state_change
ci-qemu-upstream-386 2022/09/22 06:47 upstream 06f7db949993 60af5050 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/28 10:59 net 797666cd5af0 75c78242 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/24 16:14 net b7ca8d5f56e6 0042f2b4 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/21 15:32 net 79a392a3b19a 380f82fb .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/20 21:46 net da847246ab80 c4b8ccfd .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/19 15:34 net 96628951869c dd9a85ff .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/16 00:21 net 0727a9a5fbc1 dd9a85ff .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/14 17:12 net 0727a9a5fbc1 b884348d .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/14 10:35 net 0727a9a5fbc1 b884348d .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/14 08:40 net 0727a9a5fbc1 b884348d .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/13 17:08 net ca2dccdeeb49 a08652b0 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/13 15:00 net ca2dccdeeb49 a08652b0 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/10 19:24 net 64ae13ed4784 356d8217 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-this-kasan-gce 2022/09/10 07:39 net 64ae13ed4784 356d8217 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/27 15:40 net-next 6627a2074d5c 87840e00 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/26 15:15 net-next 9258b8b1be2e d59ba983 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/24 02:19 net-next 4dfa5f05fffa 0042f2b4 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/23 21:19 net-next 4dfa5f05fffa 0042f2b4 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/20 12:55 net-next ed48cfedf1e2 7c41a9ba .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/19 18:19 net-next 44a8535fb87c dd9a85ff .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/15 20:03 net-next 006534ec2804 dd9a85ff .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/11 23:19 net-next 169ccf0e4082 356d8217 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/11 02:23 net-next 169ccf0e4082 356d8217 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/10 08:57 net-next 169ccf0e4082 356d8217 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/10 02:14 net-next 169ccf0e4082 356d8217 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-net-kasan-gce 2022/09/09 12:31 net-next 9f8f1933dce5 f3027468 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-linux-next-kasan-gce-root 2022/08/23 04:59 linux-next 8755ae45a9e8 26a13b38 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/26 10:29 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c194837ebb57 d59ba983 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/26 08:39 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c194837ebb57 d59ba983 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/26 06:10 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c194837ebb57 0042f2b4 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/25 03:49 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c194837ebb57 0042f2b4 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/24 09:34 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci c194837ebb57 0042f2b4 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/21 23:34 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci aa49f95768a9 60af5050 .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/21 18:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 4a4a085d97ce 380f82fb .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/17 12:24 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a6b443748715 dd9a85ff .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/16 06:49 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a6b443748715 dd9a85ff .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/14 22:03 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a6b443748715 b884348d .config log report info possible deadlock in rfcomm_sk_state_change
ci-upstream-gce-arm64 2022/09/08 17:35 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 25050c56fa3c f3027468 .config log report info possible deadlock in rfcomm_sk_state_change
* Struck through repros no longer work on HEAD.