watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [syz.2.135:837]
Modules linked in:
CPU: 1 PID: 837 Comm: syz.2.135 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0x8c3/0x9f0 kernel/smp.c:969
Code: 84 c0 0f 85 9d 00 00 00 41 8b 1f 89 de 83 e6 01 31 ff e8 90 37 0a 00 83 e3 01 48 8b 5c 24 10 75 07 e8 d1 33 0a 00 eb 42 f3 90 <48> b8 00 00 00 00 00 fc ff df 41 0f b6 44 05 00 84 c0 75 10 41 f7
RSP: 0018:ffffc90000bff300 EFLAGS: 00000293
RAX: ffffffff815e8b35 RBX: ffff8881f7138e80 RCX: ffff88810dc7cf00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000bff418 R08: dffffc0000000000 R09: ffffed103ee271d3
R10: ffffed103ee271d3 R11: 1ffff1103ee271d2 R12: 1ffff1103ee271d0
R13: 1ffff1103ee07af9 R14: 0000000000000000 R15: ffff8881f703d7c8
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000890000 CR3: 000000000660f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1134
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1442 [inline]
 text_poke_bp_batch+0x1cd/0x5a0 arch/x86/kernel/alternative.c:1642
 text_poke_flush arch/x86/kernel/alternative.c:1833 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1840
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146
 __jump_label_update+0x37c/0x3a0 kernel/jump_label.c:459
 jump_label_update+0x39b/0x450 kernel/jump_label.c:830
 static_key_disable_cpuslocked+0xc5/0x1a0 kernel/jump_label.c:207
 static_key_disable+0x1a/0x30 kernel/jump_label.c:215
 tracepoint_remove_func kernel/tracepoint.c:417 [inline]
 tracepoint_probe_unregister+0x60e/0x890 kernel/tracepoint.c:551
 bpf_probe_unregister+0x61/0x70 kernel/trace/bpf_trace.c:1952
 bpf_raw_tp_link_release+0x63/0x90 kernel/bpf/syscall.c:2880
 bpf_link_free+0x129/0x370 kernel/bpf/syscall.c:2446
 bpf_link_put kernel/bpf/syscall.c:2472 [inline]
 bpf_link_release+0x15f/0x170 kernel/bpf/syscall.c:2480
 __fput+0x20b/0x8b0 fs/file_table.c:311
 ____fput+0x15/0x20 fs/file_table.c:339
 task_work_run+0x127/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7e/0x27a0 kernel/exit.c:889
 do_group_exit+0x141/0x310 kernel/exit.c:1003
 get_signal+0x66a/0x1480 kernel/signal.c:2907
 arch_do_signal_or_restart+0xc1/0x10f0 arch/x86/kernel/signal.c:867
 handle_signal_work kernel/entry/common.c:154 [inline]
 exit_to_user_mode_loop+0xa7/0xe0 kernel/entry/common.c:178
 exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
 irqentry_exit_to_user_mode+0x9/0x10 kernel/entry/common.c:320
 irqentry_exit+0x12/0x40 kernel/entry/common.c:411
 exc_general_protection+0x1e4/0x270 arch/x86/kernel/traps.c:562
 asm_exc_general_protection+0x27/0x30 arch/x86/include/asm/idtentry.h:600
RIP: 0033:0x7f14139f2751
Code: Unable to access opcode bytes at RIP 0x7f14139f2727.
RSP: 002b:0000200000000570 EFLAGS: 00010217
RAX: 0000000000000000 RBX: 00007f1413c49090 RCX: 00007f14139f2749
RDX: 0000200000000140 RSI: 0000200000000570 RDI: 0000000000000000
RBP: 00007f1413a76f91 R08: 00002000000002c0 R09: 00002000000002c0
R10: 0000200000000240 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1413c49128 R14: 00007f1413c49090 R15: 00007ffc412fd088
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 939 Comm: syz.4.164 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:57 [inline]
RIP: 0010:halt arch/x86/include/asm/irqflags.h:98 [inline]
RIP: 0010:kvm_wait+0xcc/0x140 arch/x86/kernel/kvm.c:912
Code: 20 f6 44 24 21 02 75 24 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 48 0f b6 07 40 38 f0 75 a6 66 90 0f 00 2d 45 92 d6 03 f4 <eb> 9a fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07
RSP: 0018:ffffc90000c97520 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff8881145aebac RCX: ffffffff814f4289
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff8881145aebac
RBP: ffffc90000c975b0 R08: dffffc0000000000 R09: ffffed10228b5d76
R10: ffffed10228b5d76 R11: 1ffff110228b5d75 R12: 1ffff1103ee00001
R13: ffff8881f7038ad4 R14: dffffc0000000000 R15: 1ffff92000192ea4
FS:  00007fe25c2a16c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000010de1d000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:597 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x60f/0x9c0 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:585 [inline]
 queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:85 [inline]
 do_raw_spin_lock include/linux/spinlock.h:188 [inline]
 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:129 [inline]
 _raw_spin_lock_irq+0xd9/0xe0 kernel/locking/spinlock.c:170
 get_wchan kernel/sched/core.c:2021 [inline]
 perf_trace_sched_blocked_reason+0x243/0x4a0 include/trace/events/sched.h:490
 trace_sched_blocked_reason include/trace/events/sched.h:490 [inline]
 try_to_wake_up+0xea1/0x1160 kernel/sched/core.c:4190
 wake_up_process kernel/sched/core.c:4348 [inline]
 wake_up_q+0xdf/0x1c0 kernel/sched/core.c:975
 __mutex_unlock_slowpath+0x262/0x3b0 kernel/locking/mutex.c:923
 mutex_unlock+0xd8/0x220 kernel/locking/mutex.c:557
 __rtnl_unlock+0x2c/0x90 net/core/rtnetlink.c:98
 netdev_run_todo+0xf6/0x990 net/core/dev.c:10665
 rtnl_unlock+0xe/0x10 net/core/rtnetlink.c:112
 dev_ioctl+0x567/0xd10 net/core/dev_ioctl.c:588
 sock_do_ioctl+0x22e/0x300 net/socket.c:1154
 sock_ioctl+0x4bc/0x6b0 net/socket.c:1257
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0x121/0x1a0 fs/ioctl.c:860
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860
 x64_sys_call+0x2f/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe25d839749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fe25c2a1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fe25da8ffa0 RCX: 00007fe25d839749
RDX: 0000200000000080 RSI: 0000000000008922 RDI: 0000000000000012
RBP: 00007fe25d8bdf91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe25da90038 R14: 00007fe25da8ffa0 R15: 00007ffebccd64b8
 </TASK>