watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.1.782:3281]
Modules linked in:
CPU: 1 PID: 3281 Comm: syz.1.782 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:ffffc90001177560 EFLAGS: 00000293
RAX: ffffffff815e8b35 RBX: ffff8881f7138e80 RCX: ffff88810eefcf00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90001177678 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: 00007ffa2a066f98 CR3: 000000000660f000 CR4: 00000000003506a0
DR0: 0000200000000300 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_bp+0xc8/0x140 arch/x86/kernel/alternative.c:1879
 __static_call_transform+0x318/0x500 arch/x86/kernel/static_call.c:111
 arch_static_call_transform+0xb0/0x260 arch/x86/kernel/static_call.c:157
 __static_call_update+0xef/0x5c0 kernel/static_call_inline.c:136
 tracepoint_update_call kernel/tracepoint.c:317 [inline]
 tracepoint_remove_func kernel/tracepoint.c:441 [inline]
 tracepoint_probe_unregister+0x801/0x890 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_sys_exit kernel/exit.c:972 [inline]
 __se_sys_exit kernel/exit.c:970 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:970
 x64_sys_call+0x44/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:61
 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: 0033:0x7ffa2b641749
Code: Unable to access opcode bytes at RIP 0x7ffa2b64171f.
RSP: 002b:00007ffa2a0a8fe8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007ffa2b897fa0 RCX: 00007ffa2b641749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffa2b6c5f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffa2b898038 R14: 00007ffa2b897fa0 R15: 00007ffd9c50ff68
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 17 Comm: rcu_exp_gp_kthr 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:ffffc90000117740 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff88813d57d7ec RCX: ffffffff814f4289
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffff88813d57d7ec
RBP: ffffc900001177d0 R08: dffffc0000000000 R09: ffffed1027aafafe
R10: ffffed1027aafafe R11: 1ffff11027aafafd R12: 1ffff1103ee00001
R13: ffff8881f7038ad4 R14: dffffc0000000000 R15: 1ffff92000022ee8
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3aad7b65c8 CR3: 000000010f2ee000 CR4: 00000000003506b0
DR0: 0000200000000300 DR1: 0000200000000300 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
 default_wake_function+0x43/0x50 kernel/sched/core.c:6954
 autoremove_wake_function+0x16/0x110 kernel/sched/wait.c:421
 __wake_up_common+0x25d/0x460 kernel/sched/wait.c:109
 __wake_up_common_lock kernel/sched/wait.c:139 [inline]
 __wake_up+0x108/0x180 kernel/sched/wait.c:158
 rcu_exp_wait_wake kernel/rcu/tree_exp.h:705 [inline]
 rcu_exp_sel_wait_wake+0x159b/0x1950 kernel/rcu/tree_exp.h:721
 wait_rcu_exp_gp+0x33/0x40 kernel/rcu/tree_exp.h:458
 kthread_worker_fn+0x3bc/0x820 kernel/kthread.c:794
 kthread+0x411/0x500 kernel/kthread.c:337
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
 </TASK>