syzbot


INFO: task hung in rfkill_global_led_trigger_worker

Status: upstream: reported on 2025/06/17 07:16
Reported-by: syzbot+400f23dd04603030f0ee@syzkaller.appspotmail.com
First crash: 85d, last: 5d09h
Similar bugs (6)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in rfkill_global_led_trigger_worker wireless 1 3 1385d 1420d 0/29 auto-closed as invalid on 2022/01/24 07:42
linux-6.1 INFO: task hung in rfkill_global_led_trigger_worker origin:upstream 1 C 144 7d14h 903d 0/3 upstream: reported C repro on 2023/03/21 21:11
upstream INFO: task hung in rfkill_global_led_trigger_worker (3) wireless 1 C 2920 13m 417d 0/29 closed as dup on 2025/06/17 10:11
upstream INFO: task hung in rfkill_global_led_trigger_worker (2) net nfc 1 C error 1362 428d 1029d 26/29 fixed on 2024/07/09 19:14
linux-5.15 INFO: task hung in rfkill_global_led_trigger_worker origin:upstream 1 C error 63 130d 916d 0/3 upstream: reported C repro on 2023/03/08 16:06
linux-4.19 INFO: task hung in rfkill_global_led_trigger_worker 1 7 1256d 1368d 0/1 auto-closed as invalid on 2022/07/31 23:38

Sample crash report:
INFO: task kworker/0:6:5879 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:6     state:D stack:23048 pid:5879  ppid:2      flags:0x00004000
Workqueue: events rfkill_global_led_trigger_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
 rfkill_global_led_trigger_worker+0x27/0xd0 net/rfkill/core.c:182
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
INFO: task syz.7.2042:12611 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.2042      state:D stack:25320 pid:12611 ppid:10897  flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
 rfkill_unregister+0xc8/0x220 net/rfkill/core.c:1149
 nfc_unregister_device+0x96/0x2a0 net/nfc/core.c:1167
 virtual_ncidev_close+0x59/0x90 drivers/nfc/virtual_ncidev.c:172
 __fput+0x234/0x970 fs/file_table.c:384
 task_work_run+0x1ce/0x250 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd52ef8ebe9
RSP: 002b:00007ffd431e0418 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fd52f1c7da0 RCX: 00007fd52ef8ebe9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd52f1c7da0 R08: 0000000000000fa4 R09: 00000011431e070f
R10: 00007fd52f1c7cb0 R11: 0000000000000246 R12: 0000000000084e1a
R13: 00007fd52f1c6090 R14: ffffffffffffffff R15: 00007ffd431e0530
 </TASK>
INFO: task syz.6.2044:12623 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.2044      state:D stack:24304 pid:12623 ppid:9084   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
 device_lock include/linux/device.h:992 [inline]
 nfc_dev_down net/nfc/core.c:143 [inline]
 nfc_rfkill_set_block+0x50/0x2e0 net/nfc/core.c:179
 rfkill_set_block+0x1c6/0x420 net/rfkill/core.c:346
 rfkill_fop_write+0x45c/0x570 net/rfkill/core.c:1305
 do_loop_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x50e/0xc70 fs/read_write.c:862
 vfs_writev fs/read_write.c:933 [inline]
 do_writev+0x252/0x410 fs/read_write.c:976
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fbab3b8ebe9
RSP: 002b:00007fbab4acf038 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00007fbab3dc5fa0 RCX: 00007fbab3b8ebe9
RDX: 0000000000000002 RSI: 0000200000000180 RDI: 0000000000000005
RBP: 00007fbab3c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fbab3dc6038 R14: 00007fbab3dc5fa0 R15: 00007ffd5af6c788
 </TASK>
INFO: task syz.3.2057:12667 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2057      state:D stack:25128 pid:12667 ppid:5787   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
 rfkill_register+0x37/0x8e0 net/rfkill/core.c:1075
 nfc_register_device+0x14a/0x320 net/nfc/core.c:1132
 nci_register_device+0x880/0x9d0 net/nfc/nci/core.c:1266
 virtual_ncidev_open+0x12c/0x1a0 drivers/nfc/virtual_ncidev.c:157
 misc_open+0x2f9/0x370 drivers/char/misc.c:179
 chrdev_open+0x59e/0x670 fs/char_dev.c:414
 do_dentry_open+0x8c6/0x1500 fs/open.c:929
 do_open fs/namei.c:3632 [inline]
 path_openat+0x274b/0x3190 fs/namei.c:3789
 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
 do_sys_open fs/open.c:1434 [inline]
 __do_sys_openat fs/open.c:1450 [inline]
 __se_sys_openat fs/open.c:1445 [inline]
 __x64_sys_openat+0x139/0x160 fs/open.c:1445
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2a71d8ebe9
RSP: 002b:00007f2a72b52038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f2a71fc5fa0 RCX: 00007f2a71d8ebe9
RDX: 0000000000000002 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007f2a71e11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2a71fc6038 R14: 00007f2a71fc5fa0 R15: 00007ffecfb30e88
 </TASK>
INFO: task syz.4.2064:12688 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.2064      state:D stack:27912 pid:12688 ppid:7905   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
 misc_open+0x5a/0x370 drivers/char/misc.c:143
 chrdev_open+0x59e/0x670 fs/char_dev.c:414
 do_dentry_open+0x8c6/0x1500 fs/open.c:929
 do_open fs/namei.c:3632 [inline]
 path_openat+0x274b/0x3190 fs/namei.c:3789
 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
 do_sys_open fs/open.c:1434 [inline]
 __do_sys_openat fs/open.c:1450 [inline]
 __se_sys_openat fs/open.c:1445 [inline]
 __x64_sys_openat+0x139/0x160 fs/open.c:1445
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2ecff8ebe9
RSP: 002b:00007f2ed0e9c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f2ed01c5fa0 RCX: 00007f2ecff8ebe9
RDX: 0000000000000302 RSI: 0000200000000340 RDI: ffffffffffffff9c
RBP: 00007f2ed0011e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2ed01c6038 R14: 00007f2ed01c5fa0 R15: 00007ffc2c921028
 </TASK>
INFO: task syz-executor:12695 blocked for more than 144 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:27912 pid:12695 ppid:1      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
 misc_open+0x5a/0x370 drivers/char/misc.c:143
 chrdev_open+0x59e/0x670 fs/char_dev.c:414
 do_dentry_open+0x8c6/0x1500 fs/open.c:929
 do_open fs/namei.c:3632 [inline]
 path_openat+0x274b/0x3190 fs/namei.c:3789
 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
 do_sys_open fs/open.c:1434 [inline]
 __do_sys_openat fs/open.c:1450 [inline]
 __se_sys_openat fs/open.c:1445 [inline]
 __x64_sys_openat+0x139/0x160 fs/open.c:1445
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff33198d4d1
RSP: 002b:00007ffce59dae20 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007ff33198d4d1
RDX: 0000000000000002 RSI: 00007ff331a12822 RDI: 00000000ffffff9c
RBP: 00007ff331a12822 R08: 0000000000000000 R09: 00007ff3326fd6c0
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>
INFO: task syz-executor:12696 blocked for more than 145 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:27912 pid:12696 ppid:1      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5380 [inline]
 __schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
 schedule+0xbd/0x170 kernel/sched/core.c:6773
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
 misc_open+0x5a/0x370 drivers/char/misc.c:143
 chrdev_open+0x59e/0x670 fs/char_dev.c:414
 do_dentry_open+0x8c6/0x1500 fs/open.c:929
 do_open fs/namei.c:3632 [inline]
 path_openat+0x274b/0x3190 fs/namei.c:3789
 do_filp_open+0x1c5/0x3d0 fs/namei.c:3816
 do_sys_openat2+0x12c/0x1c0 fs/open.c:1419
 do_sys_open fs/open.c:1434 [inline]
 __do_sys_openat fs/open.c:1450 [inline]
 __se_sys_openat fs/open.c:1445 [inline]
 __x64_sys_openat+0x139/0x160 fs/open.c:1445
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f53f238d4d1
RSP: 002b:00007ffc95c2d020 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f53f238d4d1
RDX: 0000000000000002 RSI: 00007f53f2412822 RDI: 00000000ffffff9c
RBP: 00007f53f2412822 R08: 0000000000000000 R09: 00007f53f30fd6c0
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/29:
 #0: ffffffff8cd2fc20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
 #0: ffffffff8cd2fc20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
 #0: ffffffff8cd2fc20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by getty/5554:
 #0: ffff88802cf8e0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217
3 locks held by kworker/0:6/5879:
 #0: ffff888017870938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
 #0: ffff888017870938 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
 #1: ffffc90004cbfd00 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2609 [inline]
 #1: ffffc90004cbfd00 ((work_completion)(&rfkill_global_led_trigger_work)){+.+.}-{0:0}, at: process_scheduled_works+0x957/0x15b0 kernel/workqueue.c:2711
 #2: ffffffff8e297d68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_global_led_trigger_worker+0x27/0xd0 net/rfkill/core.c:182
1 lock held by syz.4.932/9113:
 #0: ffffffff8e297d68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xc8/0x220 net/rfkill/core.c:1149
2 locks held by syz.7.2042/12611:
 #0: ffff88805ec63100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #0: ffff88805ec63100 (&dev->mutex){....}-{3:3}, at: nfc_unregister_device+0x63/0x2a0 net/nfc/core.c:1165
 #1: ffffffff8e297d68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_unregister+0xc8/0x220 net/rfkill/core.c:1149
2 locks held by syz.6.2044/12623:
 #0: ffffffff8e297d68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_fop_write+0x1a2/0x570 net/rfkill/core.c:1297
 #1: ffff88805ec63100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #1: ffff88805ec63100 (&dev->mutex){....}-{3:3}, at: nfc_dev_down net/nfc/core.c:143 [inline]
 #1: ffff88805ec63100 (&dev->mutex){....}-{3:3}, at: nfc_rfkill_set_block+0x50/0x2e0 net/nfc/core.c:179
3 locks held by syz.3.2057/12667:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
 #1: ffff88801b3ba100 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #1: ffff88801b3ba100 (&dev->mutex){....}-{3:3}, at: nfc_register_device+0xa1/0x320 net/nfc/core.c:1128
 #2: ffffffff8e297d68 (rfkill_global_mutex){+.+.}-{3:3}, at: rfkill_register+0x37/0x8e0 net/rfkill/core.c:1075
1 lock held by syz.4.2064/12688:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12695:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12696:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12702:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12704:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12706:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12708:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12710:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12712:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12715:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12716:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12718:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143
1 lock held by syz-executor/12720:
 #0: ffffffff8d4c3508 (misc_mtx){+.+.}-{3:3}, at: misc_open+0x5a/0x370 drivers/char/misc.c:143

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

NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x39b/0x3d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xf41/0xf80 kernel/hung_task.c:379
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 993 Comm: kworker/u4:5 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:85 [inline]
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:102 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:127 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:159 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:178 [inline]
RIP: 0010:kasan_check_range+0x89/0x290 mm/kasan/generic.c:187
Code: 00 fc ff df 4d 8d 34 19 4d 89 f4 4d 29 dc 49 83 fc 10 7f 29 4d 85 e4 0f 84 41 01 00 00 4c 89 cb 48 f7 d3 4c 01 fb 41 80 3b 00 <0f> 85 cc 01 00 00 49 ff c3 48 ff c3 75 ee e9 21 01 00 00 44 89 dd
RSP: 0018:ffffc900043cf928 EFLAGS: 00000246
RAX: ffffffff849eb501 RBX: fffffffffffffff9 RCX: ffffffff849eb64e
RDX: 0000000000000001 RSI: 0000000000000040 RDI: ffffc900043cf9a0
RBP: 0000000000000000 R08: ffffc900043cf9df R09: 1ffff92000879f3b
R10: dffffc0000000000 R11: fffff52000879f35 R12: 0000000000000008
R13: 0000000000000002 R14: fffff52000879f3c R15: 1ffff92000879f34
FS:  0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005626fe29afb0 CR3: 000000000cb30000 CR4: 00000000003506f0
Call Trace:
 <TASK>
 __asan_memset+0x22/0x40 mm/kasan/shadow.c:84
 memzero_explicit include/linux/string.h:278 [inline]
 _get_random_bytes+0x1be/0x210 drivers/char/random.c:404
 nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:775 [inline]
 nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
 nsim_dev_trap_report_work+0x646/0xb00 drivers/net/netdevsim/dev.c:851
 process_one_work kernel/workqueue.c:2634 [inline]
 process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
 worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>

Crashes (7):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/09/05 00:24 linux-6.6.y 355bd0b51d2f d291dd2d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rfkill_global_led_trigger_worker
2025/08/29 14:39 linux-6.6.y cc1a1c5b404a 3e1beec6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rfkill_global_led_trigger_worker
2025/08/24 05:23 linux-6.6.y bb9c90ab9c5a bf27483f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rfkill_global_led_trigger_worker
2025/08/07 07:09 linux-6.6.y 3a8ababb8b6a 9a42d6b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rfkill_global_led_trigger_worker
2025/08/04 20:40 linux-6.6.y 3a8ababb8b6a f5bcc8dc .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rfkill_global_led_trigger_worker
2025/08/02 02:29 linux-6.6.y 3a8ababb8b6a 7368264b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rfkill_global_led_trigger_worker
2025/06/17 07:16 linux-6.6.y c2603c511feb cfebc887 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-6-kasan INFO: task hung in rfkill_global_led_trigger_worker
* Struck through repros no longer work on HEAD.