INFO: task kworker/u5:7:6615 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-next-20211208-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u5:7 state:D stack:28984 pid: 6615 ppid: 2 flags:0x00004000
Workqueue: hci3 scan_update_work
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
hci_req_sync net/bluetooth/hci_request.c:198 [inline]
scan_update_work+0x26/0xb0 net/bluetooth/hci_request.c:1900
process_one_work+0x9b2/0x1690 kernel/workqueue.c:2318
worker_thread+0x658/0x11f0 kernel/workqueue.c:2465
kthread+0x405/0x4f0 kernel/kthread.c:345
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
INFO: task systemd-rfkill:16704 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-next-20211208-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:systemd-rfkill state:D stack:26000 pid:16704 ppid: 1 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
__flush_work+0x56c/0xb10 kernel/workqueue.c:3104
__cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3191
hci_request_cancel_all+0x38/0x100 net/bluetooth/hci_request.c:2698
hci_dev_close_sync+0xa1/0x1120 net/bluetooth/hci_sync.c:4028
hci_dev_do_close+0x32/0x70 net/bluetooth/hci_core.c:553
hci_rfkill_set_block+0x19c/0x1d0 net/bluetooth/hci_core.c:935
rfkill_set_block+0x1f9/0x540 net/rfkill/core.c:344
rfkill_fop_write+0x41a/0x500 net/rfkill/core.c:1276
vfs_write+0x28e/0xae0 fs/read_write.c:588
ksys_write+0x1ee/0x250 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f5d1aadb1b0
RSP: 002b:00007ffda086f998 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000055b100d5c040 RCX: 00007f5d1aadb1b0
RDX: 0000000000000008 RSI: 00007ffda086f9e0 RDI: 0000000000000003
RBP: 00007ffda086f9d8 R08: 0000000000000003 R09: 0000000000001010
R10: 000055b100d5d2f0 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffda086f9d0 R14: 0000000000000000 R15: 0000000000000003
INFO: task syz-executor.4:16709 blocked for more than 143 seconds.
Not tainted 5.16.0-rc4-next-20211208-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:23832 pid:16709 ppid: 1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4d90 kernel/sched/core.c:6296
schedule+0xd2/0x260 kernel/sched/core.c:6369
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6428
__mutex_lock_common kernel/locking/mutex.c:673 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:733
rfkill_fop_open+0x10d/0x720 net/rfkill/core.c:1148
misc_open+0x372/0x4a0 drivers/char/misc.c:141
chrdev_open+0x266/0x770 fs/char_dev.c:414
do_dentry_open+0x4c8/0x1250 fs/open.c:824
do_open fs/namei.c:3476 [inline]
path_openat+0x1c9e/0x2940 fs/namei.c:3609
do_filp_open+0x1aa/0x400 fs/namei.c:3636
do_sys_openat2+0x16d/0x4d0 fs/open.c:1214
do_sys_open fs/open.c:1230 [inline]
__do_sys_openat fs/open.c:1246 [inline]
__se_sys_openat fs/open.c:1241 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1241
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f8b14ab2db4
RSP: 002b:00007ffe635774b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffe63577bf8 RCX: 00007f8b14ab2db4
RDX: 0000000000000002 RSI: 00007f8b14b5931c RDI: 00000000ffffff9c
RBP: 00007f8b14b5931c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffe63577690 R14: 00007f8b14c134d8 R15: 0000000000000006
Showing all locks held in the system:
2 locks held by kworker/u4:0/8:
1 lock held by khungtaskd/27:
#0: ffffffff8bb828a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
1 lock held by in:imklog/6252:
#0: ffff888012b9dc70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:994
3 locks held by kworker/u5:7/6615:
#0: ffff88807b99f138 ((wq_completion)hci3){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff88807b99f138 ((wq_completion)hci3){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff88807b99f138 ((wq_completion)hci3){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff88807b99f138 ((wq_completion)hci3){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
#0: ffff88807b99f138 ((wq_completion)hci3){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
#0: ffff88807b99f138 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2289
#1: ffffc90002a3fdb0 ((work_completion)(&hdev->scan_update)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2293
#2: ffff88807e269000 (&hdev->req_lock){+.+.}-{3:3}, at: hci_req_sync net/bluetooth/hci_request.c:198 [inline]
#2: ffff88807e269000 (&hdev->req_lock){+.+.}-{3:3}, at: scan_update_work+0x26/0xb0 net/bluetooth/hci_request.c:1900
2 locks held by systemd-rfkill/16704:
#0: ffffffff8d70c0c8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0xff/0x500 net/rfkill/core.c:1260
#1: ffff88807e269000 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x2a/0x70 net/bluetooth/hci_core.c:551
2 locks held by syz-executor.4/16709:
#0: ffffffff8c5ed4c8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
#1: ffffffff8d70c0c8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_open+0x10d/0x720 net/rfkill/core.c:1148
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc4-next-20211208-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:256 [inline]
watchdog+0xcb7/0xed0 kernel/hung_task.c:413
kthread+0x405/0x4f0 kernel/kthread.c:345
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2953 Comm: systemd-journal Not tainted 5.16.0-rc4-next-20211208-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__exit_to_user_mode kernel/entry/common.c:132 [inline]
RIP: 0010:syscall_exit_to_user_mode+0x33/0x60 kernel/entry/common.c:302
Code: 9c 58 fa f6 c4 02 75 39 48 89 ef e8 97 f3 11 f8 e8 22 69 2a f8 48 8b 7c 24 08 e8 c8 b3 08 f8 eb 14 66 90 0f 00 2d 5d 17 5a 00 <48> 8b 7c 24 08 5d e9 c2 f3 ff ff bf 01 00 00 00 e8 08 03 00 00 eb
RSP: 0018:ffffc90001abff30 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffc90001abfe80
RDX: 1ffff1100f791bdc RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90001abff58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: ffffc90001abff58
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fb041ef68c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb03f40d280 CR3: 00000000221db000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7fb04118ef17
Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00
RSP: 002b:00007ffe858098e8 EFLAGS: 00000202 ORIG_RAX: 0000000000000027
RAX: 0000000000000b89 RBX: 0000559654fc81e0 RCX: 00007fb04118ef17
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000559654fc81e0
RBP: 0000000000000b89 R08: 0000000061b3d575 R09: 00007ffe8588e080
R10: 00007ffe8588e080 R11: 0000000000000202 R12: ffffffffffffffff
R13: 00007ffe85809978 R14: 0000559654dc0958 R15: 0005d2d24be3a3bb
----------------
Code disassembly (best guess):
0: 9c pushfq
1: 58 pop %rax
2: fa cli
3: f6 c4 02 test $0x2,%ah
6: 75 39 jne 0x41
8: 48 89 ef mov %rbp,%rdi
b: e8 97 f3 11 f8 callq 0xf811f3a7
10: e8 22 69 2a f8 callq 0xf82a6937
15: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi
1a: e8 c8 b3 08 f8 callq 0xf808b3e7
1f: eb 14 jmp 0x35
21: 66 90 xchg %ax,%ax
23: 0f 00 2d 5d 17 5a 00 verw 0x5a175d(%rip) # 0x5a1787
* 2a: 48 8b 7c 24 08 mov 0x8(%rsp),%rdi <-- trapping instruction
2f: 5d pop %rbp
30: e9 c2 f3 ff ff jmpq 0xfffff3f7
35: bf 01 00 00 00 mov $0x1,%edi
3a: e8 08 03 00 00 callq 0x347
3f: eb .byte 0xeb