kthread+0x324/0x3b0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.4.3084:12868]
Modules linked in:
CPU: 1 PID: 12868 Comm: syz.4.3084 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:csd_lock_wait kernel/smp.c:229 [inline]
RIP: 0010:smp_call_function_single+0x211/0x490 kernel/smp.c:517
Code: ff e8 63 90 0a 00 41 83 e6 01 49 bc 00 00 00 00 00 fc ff df 75 0a e8 9e 8c 0a 00 e9 a4 00 00 00 f3 90 f7 44 24 48 01 00 00 00 <0f> 84 8f 00 00 00 e8 84 8c 0a 00 eb e9 e8 2d fd 22 03 89 c3 41 89
RSP: 0018:ffffc900014bfa60 EFLAGS: 00000202
RAX: ffffffff815a28cc RBX: 0000000000000000 RCX: ffff88812be10000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900014bfb50 R08: ffff8881f7057647 R09: 1ffff1103ee0aec8
R10: dffffc0000000000 R11: ffffed103ee0aec9 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000000000000001 R15: 1ffff92000297f50
FS:  000055556d96d500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbd3a196270 CR3: 00000001285d8000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 task_function_call kernel/events/core.c:116 [inline]
 event_function_call+0x2a3/0x430 kernel/events/core.c:284
 perf_remove_from_context kernel/events/core.c:2453 [inline]
 perf_event_release_kernel+0x487/0xdc0 kernel/events/core.c:5107
 perf_release+0x3b/0x40 kernel/events/core.c:5216
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 tracehook_notify_resume include/linux/tracehook.h:188 [inline]
 exit_to_user_mode_loop+0xcb/0xe0 kernel/entry/common.c:175
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:202
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:277
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f4e01160159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd7475d6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f4e013e9da0 RCX: 00007f4e01160159
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f4e013e9da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007f4e013e9cb0 R11: 0000000000000246 R12: 000000000003f9be
R13: 00007f4e013e836c R14: 000000000003f6f1 R15: 00007f4e013e8360
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 12919 Comm: syz.1.3095 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:native_halt arch/x86/include/asm/irqflags.h:66 [inline]
RIP: 0010:halt arch/x86/include/asm/irqflags.h:112 [inline]
RIP: 0010:kvm_wait+0xbe/0x130 arch/x86/kernel/kvm.c:921
Code: c1 e8 03 42 0f b6 04 30 84 c0 75 6d 0f b6 07 40 38 f0 75 26 41 f7 c4 00 02 00 00 75 0f 0f 1f 44 00 00 0f 00 2d 73 1d b8 03 f4 <eb> 0e 0f 1f 44 00 00 0f 00 2d 64 1d b8 03 fb f4 4c 89 64 24 18 ff
RSP: 0018:ffffc900015af2c0 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffffffff86eaeb80 RCX: 0000000086eaeb00
RDX: 0000000000000001 RSI: 0000000000000003 RDI: ffffffff86eaeb80
RBP: ffffc900015af370 R08: 0000000000000000 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff0dd5d70 R12: 0000000000000046
R13: 1aa1007391a8ae80 R14: dffffc0000000000 R15: 1ffff920002b5e5c
FS:  00007f83be81c6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c296478 CR3: 000000010b6ce000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 pv_wait arch/x86/include/asm/paravirt.h:564 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x72d/0xb80 kernel/locking/qspinlock.c:508
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:554 [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_flags include/linux/spinlock.h:196 [inline]
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:119 [inline]
 _raw_spin_lock_irqsave+0x120/0x130 kernel/locking/spinlock.c:159
 bpf_do_trace_printk+0xbe/0x260 kernel/trace/bpf_trace.c:396
 ____bpf_trace_printk kernel/trace/bpf_trace.c:541 [inline]
 bpf_trace_printk+0xcc9/0xd80 kernel/trace/bpf_trace.c:413
 bpf_prog_e2c5e1ee9969f238+0x35/0x77c
 bpf_dispatcher_nop_func include/linux/bpf.h:669 [inline]
 trace_call_bpf+0x104/0x330 kernel/trace/bpf_trace.c:124
 perf_trace_run_bpf_submit+0x7c/0x1c0 kernel/events/core.c:9593
 perf_trace_bpf_trace_printk+0x2ae/0x350 kernel/trace/bpf_trace.h:11
 __traceiter_bpf_trace_printk+0x68/0xb0 kernel/trace/bpf_trace.h:11
 trace_bpf_trace_printk kernel/trace/bpf_trace.h:11 [inline]
 bpf_do_trace_printk+0x20b/0x260 kernel/trace/bpf_trace.c:403
 ____bpf_trace_printk kernel/trace/bpf_trace.c:541 [inline]
 bpf_trace_printk+0xcc9/0xd80 kernel/trace/bpf_trace.c:413
 bpf_prog_0605f9f479290f07+0x2f/0xf10
 bpf_dispatcher_nop_func include/linux/bpf.h:669 [inline]
 __bpf_prog_test_run_raw_tp+0x8d/0x240 net/bpf/test_run.c:303
 bpf_prog_test_run_raw_tp+0x480/0x670 net/bpf/test_run.c:347
 bpf_prog_test_run+0x34a/0x3c0 kernel/bpf/syscall.c:3156
 __do_sys_bpf kernel/bpf/syscall.c:4453 [inline]
 __se_sys_bpf+0x501/0x740 kernel/bpf/syscall.c:4391
 __x64_sys_bpf+0x7b/0x90 kernel/bpf/syscall.c:4391
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f83bfde4159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f83be81c028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f83c006c090 RCX: 00007f83bfde4159
RDX: 0000000000000050 RSI: 0000200000000700 RDI: 000000000000000a
RBP: 00007f83bfe7b06b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f83c006c128 R14: 00007f83c006c090 R15: 00007ffe76beafc8