INFO: task syz-executor:5824 blocked for more than 143 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21128 pid:5824 tgid:5824 ppid:1 task_flags:0x40054c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
rwsem_down_write_slowpath+0x872/0xfe0 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1591
mmap_write_lock include/linux/mmap_lock.h:312 [inline]
exit_mmap+0x286/0xb40 mm/mmap.c:1288
__mmput+0x118/0x430 kernel/fork.c:1133
exit_mm+0x1da/0x2c0 kernel/exit.c:582
do_exit+0x648/0x2300 kernel/exit.c:954
do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
get_signal+0x1285/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f800c185e93
RSP: 002b:00007ffed8fa6718 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: fffffffffffffff4 RBX: 0000000000000000 RCX: 00007f800c185e93
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000001
R10: 000055558405c7d0 R11: 0000000000000246 R12: 0000000000000000
R13: 000055558406f590 R14: 00000000000658b7 R15: 00007ffed8fa68b0
INFO: task syz-executor:5827 blocked for more than 143 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20712 pid:5827 tgid:5827 ppid:1 task_flags:0x40054c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
rwsem_down_write_slowpath+0x872/0xfe0 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1591
mmap_write_lock include/linux/mmap_lock.h:312 [inline]
exit_mmap+0x286/0xb40 mm/mmap.c:1288
__mmput+0x118/0x430 kernel/fork.c:1133
exit_mm+0x1da/0x2c0 kernel/exit.c:582
do_exit+0x648/0x2300 kernel/exit.c:954
do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
get_signal+0x1285/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff3f9f85897
RSP: 002b:00007ffceedfb0c0 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 00000000000003dd RCX: 00007ff3f9f85897
RDX: 0000000040000000 RSI: 00007ffceedfb12c RDI: 00000000ffffffff
RBP: 00007ffceedfb12c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000123
R13: 000055558a6a6590 R14: 000000000006619e R15: 00007ffceedfb180
INFO: task syz-executor:5838 blocked for more than 143 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21032 pid:5838 tgid:5838 ppid:1 task_flags:0x40054c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
rwsem_down_write_slowpath+0x872/0xfe0 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1591
mmap_write_lock include/linux/mmap_lock.h:312 [inline]
exit_mmap+0x286/0xb40 mm/mmap.c:1288
__mmput+0x118/0x430 kernel/fork.c:1133
exit_mm+0x1da/0x2c0 kernel/exit.c:582
do_exit+0x648/0x2300 kernel/exit.c:954
do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
get_signal+0x1285/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c4c785897
RSP: 002b:00007fffea49edd0 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 0000000000000457 RCX: 00007f1c4c785897
RDX: 0000000040000000 RSI: 00007fffea49ee3c RDI: 00000000ffffffff
RBP: 00007fffea49ee3c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000013e
R13: 000055556f98f590 R14: 00000000000661a5 R15: 00007fffea49ee90
INFO: task syz.2.1608:12647 blocked for more than 144 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.1608 state:D stack:27152 pid:12647 tgid:12647 ppid:5838 task_flags:0x40004c flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
rwsem_down_write_slowpath+0x872/0xfe0 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1591
mmap_write_lock include/linux/mmap_lock.h:312 [inline]
exit_mmap+0x286/0xb40 mm/mmap.c:1288
__mmput+0x118/0x430 kernel/fork.c:1133
exit_mm+0x1da/0x2c0 kernel/exit.c:582
do_exit+0x648/0x2300 kernel/exit.c:954
do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
__do_sys_exit_group kernel/exit.c:1118 [inline]
__se_sys_exit_group kernel/exit.c:1116 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1116
x64_sys_call+0x21f7/0x2200 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c4c78f749
RSP: 002b:00007fffea49edd8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f1c4c78f749
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fffea49ee3c R08: 00000008ea49eecf R09: 00000000000927c0
R10: 0000000000000001 R11: 0000000000000246 R12: 000000000000013e
R13: 00000000000927c0 R14: 00000000000660d6 R15: 00007fffea49ee90
INFO: task syz.3.1610:12650 blocked for more than 144 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1610 state:D stack:25320 pid:12650 tgid:12649 ppid:5827 task_flags:0x40054c flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
rwsem_down_write_slowpath+0x872/0xfe0 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1591
mmap_write_lock include/linux/mmap_lock.h:312 [inline]
exit_mmap+0x286/0xb40 mm/mmap.c:1288
__mmput+0x118/0x430 kernel/fork.c:1133
exit_mm+0x1da/0x2c0 kernel/exit.c:582
do_exit+0x648/0x2300 kernel/exit.c:954
do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
get_signal+0x1285/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff3f9f8f749
RSP: 002b:00007ff3fae92038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffed RBX: 00007ff3fa1e5fa0 RCX: 00007ff3f9f8f749
RDX: 0000200000000000 RSI: 0000000000008b34 RDI: 0000000000000008
RBP: 00007ff3fa013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff3fa1e6038 R14: 00007ff3fa1e5fa0 R15: 00007ffceedfad68
INFO: task syz.1.1607:12652 blocked for more than 144 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.1607 state:D stack:23664 pid:12652 tgid:12651 ppid:5833 task_flags:0x40054c flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x1798/0x4cc0 kernel/sched/core.c:6929
__schedule_loop kernel/sched/core.c:7011 [inline]
schedule+0x165/0x360 kernel/sched/core.c:7026
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7083
rwsem_down_write_slowpath+0x872/0xfe0 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1ab/0x1f0 kernel/locking/rwsem.c:1591
mmap_write_lock include/linux/mmap_lock.h:312 [inline]
exit_mmap+0x286/0xb40 mm/mmap.c:1288
__mmput+0x118/0x430 kernel/fork.c:1133
exit_mm+0x1da/0x2c0 kernel/exit.c:582
do_exit+0x648/0x2300 kernel/exit.c:954
do_group_exit+0x21c/0x2d0 kernel/exit.c:1107
get_signal+0x1285/0x1340 kernel/signal.c:3034
arch_do_signal_or_restart+0xa0/0x790 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x72/0x130 kernel/entry/common.c:40
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x2bd/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f92c818f749
RSP: 002b:00007f92c8fb60e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f92c83e5fa8 RCX: 00007f92c818f749
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f92c83e5fa8
RBP: 00007f92c83e5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f92c83e6038 R14: 00007fffc6d61810 R15: 00007fffc6d618f8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8df3d6e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8df3d6e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8df3d6e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:2/36:
#0: ffff88801a069148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3238 [inline]
#0: ffff88801a069148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x17b0 kernel/workqueue.c:3346
#1: ffffc90000ac7ba0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3239 [inline]
#1: ffffc90000ac7ba0 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x17b0 kernel/workqueue.c:3346
2 locks held by udevd/5198:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
#1: ffff88807160d7e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:330 [inline]
#1: ffff88807160d7e0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x126/0x1b10 mm/mmap.c:1727
1 lock held by dhcpcd/5493:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
2 locks held by getty/5584:
#0: ffff88803002a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036bb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
1 lock held by syz-executor/5824:
#0: ffff888030e39760 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:312 [inline]
#0: ffff888030e39760 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x286/0xb40 mm/mmap.c:1288
1 lock held by syz-executor/5827:
#0: ffff888030e3a220 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:312 [inline]
#0: ffff888030e3a220 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x286/0xb40 mm/mmap.c:1288
1 lock held by syz-executor/5838:
#0: ffff8880713fd7e0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:312 [inline]
#0: ffff8880713fd7e0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x286/0xb40 mm/mmap.c:1288
1 lock held by syz.2.1608/12647:
#0: ffff888030e3c260 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:312 [inline]
#0: ffff888030e3c260 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x286/0xb40 mm/mmap.c:1288
1 lock held by syz.3.1610/12650:
#0: ffff888030e3b7a0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:312 [inline]
#0: ffff888030e3b7a0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x286/0xb40 mm/mmap.c:1288
1 lock held by syz.1.1607/12652:
#0: ffff888027542ce0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:312 [inline]
#0: ffff888027542ce0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x286/0xb40 mm/mmap.c:1288
1 lock held by modprobe/12654:
#0: ffff888030e3ed60 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:330 [inline]
#0: ffff888030e3ed60 (&mm->mmap_lock){++++}-{4:4}, at: setup_arg_pages+0x2ab/0xa90 fs/exec.c:650
1 lock held by syz-executor/12993:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
1 lock held by syz-executor/12997:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
1 lock held by syz-executor/13001:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
1 lock held by syz-executor/16115:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
2 locks held by syz.8.2854/17481:
#0: ffff8880813a6c90 (&uprobe->register_rwsem){+.+.}-{4:4}, at: uprobe_register+0x68f/0x950 kernel/events/uprobes.c:1422
#1: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: register_for_each_vma+0x32/0xc30 kernel/events/uprobes.c:1278
1 lock held by syz-executor/17497:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
1 lock held by syz-executor/17498:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
1 lock held by syz-executor/17501:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
1 lock held by syz-executor/17502:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
1 lock held by syz-executor/17503:
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: dup_mm kernel/fork.c:1488 [inline]
#0: ffffffff8dff6910 (dup_mmap_sem){++++}-{0:0}, at: copy_mm+0x131/0x4b0 kernel/fork.c:1541
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:332 [inline]
watchdog+0xf60/0xfa0 kernel/hung_task.c:495
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x4bc/0x870 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 93 c1 1f 00 f3 0f 1e fa fb f4 c8 e6 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: 81f128054c079f00 RBX: ffffffff81967b47 RCX: 81f128054c079f00
RDX: 0000000000000001 RSI: ffffffff8d714225 RDI: ffffffff8bbf08e0
RBP: ffffc90000197f10 R08: ffff8880b8932fdb R09: 1ffff110171265fb
R10: dffffc0000000000 R11: ffffed10171265fc R12: ffffffff8f7d1e70
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff110039d3b58
FS: 0000000000000000(0000) GS:ffff888126231000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9bc7c0ae35 CR3: 000000000dd38000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
default_idle+0x13/0x20 arch/x86/kernel/process.c:767
default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:190 [inline]
do_idle+0x1e7/0x510 kernel/sched/idle.c:330
cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:428
start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:315
common_startup_64+0x13e/0x147
ip6_tunnel: ip6gre2 xmit: Local address not yet configured!
ip6_tunnel: ip6gre2 xmit: Local address not yet configured!