RBP: 00007fd4c408bda0 R08: 0000000000000214 R09: 0000001d454f75cf
R10: 00000000003ffbc8 R11: 0000000000000246 R12: 0000000000015f2a
R13: 00007fd4c408a090 R14: ffffffffffffffff R15: 00007ffd454f73f0
</TASK>
watchdog: BUG: soft lockup - CPU#0 stuck for 266s! [syz.0.608:2634]
Modules linked in:
CPU: 0 PID: 2634 Comm: syz.0.608 Tainted: G W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x60 kernel/kcov.c:199
Code: 00 00 00 0f 0b 0f 1f 44 00 00 55 48 89 e5 53 48 89 fb e8 13 00 00 00 48 8b 3d 3c 6c 80 05 48 89 de e8 74 c9 3d 00 5b 5d c3 00 <55> 48 89 e5 48 8b 45 08 65 48 8b 0d 20 ae 99 7e 65 8b 15 21 ae 99
RSP: 0018:ffffc90000b87b08 EFLAGS: 00000202
RAX: 1ffff1102346c2dc RBX: ffff88811a360dc0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000b87b50 R08: dffffc0000000000 R09: fffffbfff0dd2625
R10: fffffbfff0dd2625 R11: 1ffffffff0dd2624 R12: ffff88811a3611b0
R13: ffff88811a360db0 R14: ffff88811a3616e0 R15: ffffffff8681eaf8
FS: 00005555793cb500(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 0000000129996000 CR4: 00000000003506b0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
<TASK>
perf_event_bpf_event+0x3cf/0x4c0 kernel/events/core.c:9162
bpf_prog_put_deferred+0x99/0x3c0 kernel/bpf/syscall.c:1794
__bpf_prog_put kernel/bpf/syscall.c:1809 [inline]
bpf_prog_put kernel/bpf/syscall.c:1816 [inline]
bpf_prog_release+0x243/0x250 kernel/bpf/syscall.c:1824
__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
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0xd0/0xe0 kernel/entry/common.c:181
exit_to_user_mode_prepare+0x87/0xd0 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x1a/0x30 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fd4c3e33749
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:00007ffd454f72d8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fd4c408bda0 RCX: 00007fd4c3e33749
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd4c408bda0 R08: 0000000000000214 R09: 0000001d454f75cf
R10: 00000000003ffbc8 R11: 0000000000000246 R12: 0000000000015f2a
R13: 00007fd4c408a090 R14: ffffffffffffffff R15: 00007ffd454f73f0
</TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8 Comm: kworker/u4:0 Tainted: G W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:csd_lock_wait kernel/smp.c:440 [inline]
RIP: 0010:smp_call_function_many_cond+0x8d3/0x9f0 kernel/smp.c:969
Code: 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 07 01 00 00 00 74 1e e8 ab 33 0a 00 eb da 44 89
RSP: 0018:ffffc90000087860 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff8881f7138e80 RCX: ffff888100274f00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90000087978 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: 00007feaa0824d60 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_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_enable_cpuslocked+0x126/0x240 kernel/jump_label.c:177
static_key_enable+0x1a/0x30 kernel/jump_label.c:190
toggle_allocation_gate+0xb4/0x410 mm/kfence/core.c:766
process_one_work+0x6be/0xba0 kernel/workqueue.c:2325
worker_thread+0xa59/0x1200 kernel/workqueue.c:2472
kthread+0x411/0x500 kernel/kthread.c:337
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
</TASK>