syzbot


INFO: task hung in rfkill_global_led_trigger_worker

Status: auto-closed as invalid on 2022/01/24 07:42
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 408d, last: 372d
similar bugs (2):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in rfkill_global_led_trigger_worker (2) C error 43 15h04m 17d 0/24 upstream: reported C repro on 2022/11/15 16:56
linux-4.19 INFO: task hung in rfkill_global_led_trigger_worker 7 244d 355d 0/1 auto-closed as invalid on 2022/07/31 23:38

Sample crash report:
INFO: task kworker/0:1:23940 blocked for more than 143 seconds.
      Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:1     state:D stack:24392 pid:23940 ppid:     2 flags:0x00004000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4983 [inline]
 __schedule+0xab2/0x4d90 kernel/sched/core.c:6293
 schedule+0xd2/0x260 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:680 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
 rfkill_global_led_trigger_worker+0x17/0x110 net/rfkill/core.c:180
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2299
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2446
 kthread+0x405/0x4f0 kernel/kthread.c:345
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
INFO: task kworker/0:3:23942 blocked for more than 143 seconds.
      Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:3     state:D stack:24352 pid:23942 ppid:     2 flags:0x00004000
Workqueue: events rfkill_sync_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4983 [inline]
 __schedule+0xab2/0x4d90 kernel/sched/core.c:6293
 schedule+0xd2/0x260 kernel/sched/core.c:6366
 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:3085
 __cancel_work_timer+0x3f9/0x570 kernel/workqueue.c:3172
 hci_request_cancel_all+0x38/0x100 net/bluetooth/hci_request.c:2709
 hci_dev_close_sync+0xa1/0x1120 net/bluetooth/hci_sync.c:3971
 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_sync_work+0x8a/0xc0 net/rfkill/core.c:1029
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2299
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2446
 kthread+0x405/0x4f0 kernel/kthread.c:345
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
INFO: task systemd-rfkill:9162 blocked for more than 143 seconds.
      Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:systemd-rfkill  state:D stack:26424 pid: 9162 ppid:     1 flags:0x00000000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4983 [inline]
 __schedule+0xab2/0x4d90 kernel/sched/core.c:6293
 schedule+0xd2/0x260 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:680 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
 rfkill_fop_write+0xff/0x500 net/rfkill/core.c:1260
 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: 0033:0x7f79575741b0
RSP: 002b:00007ffc13a72dd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000056552288f040 RCX: 00007f79575741b0
RDX: 0000000000000008 RSI: 00007ffc13a72e20 RDI: 0000000000000003
RBP: 00007ffc13a72e18 R08: 00005655228951b0 R09: 0000000000001010
R10: 0000000000080000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc13a72e10 R14: 0000000000000000 R15: 0000000000000003
 </TASK>
INFO: task syz-executor.3:9212 blocked for more than 144 seconds.
      Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:23608 pid: 9212 ppid:     1 flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4983 [inline]
 __schedule+0xab2/0x4d90 kernel/sched/core.c:6293
 schedule+0xd2/0x260 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:680 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
 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:822
 do_open fs/namei.c:3426 [inline]
 path_openat+0x1cad/0x2750 fs/namei.c:3559
 do_filp_open+0x1aa/0x400 fs/namei.c:3586
 do_sys_openat2+0x16d/0x4d0 fs/open.c:1212
 do_sys_open fs/open.c:1228 [inline]
 __do_sys_openat fs/open.c:1244 [inline]
 __se_sys_openat fs/open.c:1239 [inline]
 __x64_sys_openat+0x13f/0x1f0 fs/open.c:1239
 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: 0033:0x7fd7c9da4a04
RSP: 002b:00007ffd621f1370 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffd621f1ab8 RCX: 00007fd7c9da4a04
RDX: 0000000000000002 RSI: 00007fd7c9e4b26f RDI: 00000000ffffff9c
RBP: 00007fd7c9e4b26f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000002
R13: 00007ffd621f1550 R14: 0000000000000000 R15: 00000000000000f8
 </TASK>
INFO: task kworker/u5:0:9229 blocked for more than 144 seconds.
      Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u5:0    state:D stack:28928 pid: 9229 ppid:     2 flags:0x00004000
Workqueue: hci3 scan_update_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:4983 [inline]
 __schedule+0xab2/0x4d90 kernel/sched/core.c:6293
 schedule+0xd2/0x260 kernel/sched/core.c:6366
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6425
 __mutex_lock_common kernel/locking/mutex.c:680 [inline]
 __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
 hci_req_sync net/bluetooth/hci_request.c:209 [inline]
 scan_update_work+0x26/0xb0 net/bluetooth/hci_request.c:1911
 process_one_work+0x9b2/0x1690 kernel/workqueue.c:2299
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2446
 kthread+0x405/0x4f0 kernel/kthread.c:345
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>

Showing all locks held in the system:
5 locks held by kworker/u4:1/10:
1 lock held by khungtaskd/27:
 #0: ffffffff8bb83220 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
2 locks held by in:imklog/6250:
 #0: ffff8880225e34f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
 #1: ffffffff8bb83220 (rcu_read_lock){....}-{1:2}, at: might_alloc include/linux/sched/mm.h:253 [inline]
 #1: ffffffff8bb83220 (rcu_read_lock){....}-{1:2}, at: slab_pre_alloc_hook mm/slab.h:492 [inline]
 #1: ffffffff8bb83220 (rcu_read_lock){....}-{1:2}, at: slab_alloc_node mm/slub.c:3148 [inline]
 #1: ffffffff8bb83220 (rcu_read_lock){....}-{1:2}, at: slab_alloc mm/slub.c:3242 [inline]
 #1: ffffffff8bb83220 (rcu_read_lock){....}-{1:2}, at: kmem_cache_alloc_trace+0x3b/0x2c0 mm/slub.c:3259
3 locks held by kworker/0:1/23940:
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2270
 #1: ffffc90002a5fdb0 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2274
 #2: ffffffff8d6fa6e8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x17/0x110 net/rfkill/core.c:180
4 locks held by kworker/0:3/23942:
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
 #0: ffff888010c64d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2270
 #1: ffffc900029dfdb0 ((work_completion)(&rfkill->sync_work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2274
 #2: ffffffff8d6fa6e8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_sync_work+0x18/0xc0 net/rfkill/core.c:1027
 #3: ffff888017d8d000 (&hdev->req_lock){+.+.}-{3:3}, at: hci_dev_do_close+0x2a/0x70 net/bluetooth/hci_core.c:551
5 locks held by kworker/u4:3/24238:
 #0: ffff8880b9c39d58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:489
 #1: ffff8880b9c279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3e7/0x4e0 kernel/sched/psi.c:891
 #2: ffff8880b9c28518 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x5a/0x1f0 kernel/time/timer.c:946
 #3: ffffffff907781e0 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_object_activate+0x12e/0x3e0 lib/debugobjects.c:661
 #4: ffffffff8ba4c748 (text_mutex){+.+.}-{3:3}, at: arch_jump_label_transform_apply+0xe/0x20 arch/x86/kernel/jump_label.c:145
1 lock held by systemd-rfkill/9162:
 #0: ffffffff8d6fa6e8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0xff/0x500 net/rfkill/core.c:1260
2 locks held by syz-executor.3/9212:
 #0: ffffffff8c5df5e8 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x55/0x4a0 drivers/char/misc.c:107
 #1: ffffffff8d6fa6e8 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_open+0x10d/0x720 net/rfkill/core.c:1148
3 locks held by kworker/u5:0/9229:
 #0: ffff88807a2a3938 ((wq_completion)hci3){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
 #0: ffff88807a2a3938 ((wq_completion)hci3){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
 #0: ffff88807a2a3938 ((wq_completion)hci3){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline]
 #0: ffff88807a2a3938 ((wq_completion)hci3){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline]
 #0: ffff88807a2a3938 ((wq_completion)hci3){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline]
 #0: ffff88807a2a3938 ((wq_completion)hci3){+.+.}-{0:0}, at: process_one_work+0x896/0x1690 kernel/workqueue.c:2270
 #1: ffffc9000329fdb0 ((work_completion)(&hdev->scan_update)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1690 kernel/workqueue.c:2274
 #2: ffff888017d8d000 (&hdev->req_lock){+.+.}-{3:3}, at: hci_req_sync net/bluetooth/hci_request.c:209 [inline]
 #2: ffff888017d8d000 (&hdev->req_lock){+.+.}-{3:3}, at: scan_update_work+0x26/0xb0 net/bluetooth/hci_request.c:1911

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <TASK>
 __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
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2961 Comm: systemd-journal Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:71 [inline]
RIP: 0010:test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline]
RIP: 0010:PageSlab include/linux/page-flags.h:500 [inline]
RIP: 0010:check_heap_object mm/usercopy.c:238 [inline]
RIP: 0010:__check_object_size mm/usercopy.c:286 [inline]
RIP: 0010:__check_object_size+0x315/0x850 mm/usercopy.c:256
Code: 4c 89 fe e8 ad b9 ab ff 4d 85 ff 0f 85 b6 03 00 00 e8 0f b7 ab ff 0f 1f 44 00 00 e8 05 b7 ab ff 4d 89 f7 4c 89 f2 48 89 14 24 <e8> f6 b6 ab ff be 08 00 00 00 4c 89 ff e8 49 49 f6 ff 48 8b 14 24
RSP: 0018:ffffc90001acfd48 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000fe0 RCX: 0000000000000000
RDX: ffffea000114c000 RSI: ffffffff81cc2ddb RDI: 0000000000000003
RBP: ffff888045304300 R08: 0000000000000000 R09: 000000000000002e
R10: ffffffff81cc2dc3 R11: 000000000000003f R12: ffff888045303320
R13: 0000000000000000 R14: ffffea000114c000 R15: ffffea000114c000
FS:  00007f32a6d408c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f32a45f6000 CR3: 000000001d61b000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 check_object_size include/linux/thread_info.h:185 [inline]
 strncpy_from_user+0xaa/0x3e0 lib/strncpy_from_user.c:137
 getname_flags.part.0+0x95/0x4f0 fs/namei.c:149
 getname_flags+0x9a/0xe0 include/linux/audit.h:323
 user_path_at_empty+0x2b/0x60 fs/namei.c:2800
 user_path_at include/linux/namei.h:57 [inline]
 do_faccessat+0x127/0x850 fs/open.c:421
 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: 0033:0x7f32a5ffb9c7
Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48
RSP: 002b:00007ffdcbee84e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015
RAX: ffffffffffffffda RBX: 00007ffdcbeeb400 RCX: 00007f32a5ffb9c7
RDX: 00007f32a6a6ca00 RSI: 0000000000000000 RDI: 0000559c44de49a3
RBP: 00007ffdcbee8520 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ffdcbeeb400 R15: 00007ffdcbee8a10
 </TASK>
----------------
Code disassembly (best guess):
   0:	4c 89 fe             	mov    %r15,%rsi
   3:	e8 ad b9 ab ff       	callq  0xffabb9b5
   8:	4d 85 ff             	test   %r15,%r15
   b:	0f 85 b6 03 00 00    	jne    0x3c7
  11:	e8 0f b7 ab ff       	callq  0xffabb725
  16:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  1b:	e8 05 b7 ab ff       	callq  0xffabb725
  20:	4d 89 f7             	mov    %r14,%r15
  23:	4c 89 f2             	mov    %r14,%rdx
  26:	48 89 14 24          	mov    %rdx,(%rsp)
* 2a:	e8 f6 b6 ab ff       	callq  0xffabb725 <-- trapping instruction
  2f:	be 08 00 00 00       	mov    $0x8,%esi
  34:	4c 89 ff             	mov    %r15,%rdi
  37:	e8 49 49 f6 ff       	callq  0xfff64985
  3c:	48 8b 14 24          	mov    (%rsp),%rdx

Crashes (3):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-linux-next-kasan-gce-root 2021/11/25 07:35 linux-next f81e94e91878 545ab074 .config log report info INFO: task hung in rfkill_global_led_trigger_worker
ci-upstream-linux-next-kasan-gce-root 2021/11/16 13:18 linux-next a2f3bb245883 600426bd .config log report info INFO: task hung in rfkill_global_led_trigger_worker
ci-upstream-linux-next-kasan-gce-root 2021/10/20 11:56 linux-next 51dba6e335ff 418a00eb .config log report info INFO: task hung in rfkill_global_led_trigger_worker
* Struck through repros no longer work on HEAD.