RBP: 00007ff78642ca4c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff7865c5fa0 R15: 00007ffda130dc58
 </TASK>
watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [syz.2.1631:3731]
Modules linked in:
CPU: 1 PID: 3731 Comm: syz.2.1631 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:csd_lock_wait kernel/smp.c:453 [inline]
RIP: 0010:smp_call_function_many_cond+0x88d/0x980 kernel/smp.c:998
Code: 41 8b 1f 89 de 83 e6 01 31 ff e8 8e 75 09 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 0a e8 5a 71 09 00 e9 38 ff ff ff f3 90 <41> 0f b6 44 1d 00 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 1a ff ff
RSP: 0018:ffffc9000294f660 EFLAGS: 00000293
RAX: ffffffff8167fad9 RBX: dffffc0000000000 RCX: ffff88811a31e540
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000294f798 R08: ffff8881f6f390d7 R09: 1ffff1103ede721a
R10: 0000000000000000 R11: ffffffff8134c3d0 R12: 1ffff1103ede7218
R13: 1ffff1103edc7ae1 R14: 0000000000000000 R15: ffff8881f6e3d708
FS:  00007ff7872fd6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff786274200 CR3: 000000010d185000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1165
 on_each_cpu include/linux/smp.h:71 [inline]
 text_poke_sync arch/x86/kernel/alternative.c:1574 [inline]
 text_poke_bp_batch+0x1cf/0x600 arch/x86/kernel/alternative.c:1774
 text_poke_flush arch/x86/kernel/alternative.c:1965 [inline]
 text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1972
 arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146
 __jump_label_update+0x37c/0x3a0 kernel/jump_label.c:451
 jump_label_update+0x39b/0x450 kernel/jump_label.c:797
 static_key_enable_cpuslocked+0x126/0x240 kernel/jump_label.c:173
 static_key_enable+0x1a/0x30 kernel/jump_label.c:186
 tracepoint_add_func+0x795/0x8f0 kernel/tracepoint.c:361
 tracepoint_probe_register_prio_may_exist+0x5b/0x90 kernel/tracepoint.c:482
 tracepoint_probe_register_may_exist include/linux/tracepoint.h:52 [inline]
 __bpf_probe_register kernel/trace/bpf_trace.c:2348 [inline]
 bpf_probe_register+0x13f/0x1d0 kernel/trace/bpf_trace.c:2354
 bpf_raw_tp_link_attach+0x3e9/0x570 kernel/bpf/syscall.c:3370
 bpf_raw_tracepoint_open+0x258/0x490 kernel/bpf/syscall.c:3397
 __sys_bpf+0x544/0x850 kernel/bpf/syscall.c:5047
 __do_sys_bpf kernel/bpf/syscall.c:5109 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5107 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5107
 x64_sys_call+0x488/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:322
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7ff78639a079
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:00007ff7872fd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ff7865c5fa0 RCX: 00007ff78639a079
RDX: 0000000000000010 RSI: 0000200000000040 RDI: 0000000000000011
RBP: 00007ff78642ca4c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007ff7865c5fa0 R15: 00007ffda130dc58
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14 Comm: rcu_preempt Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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+0xdf/0x150 arch/x86/kernel/kvm.c:1058
Code: 43 c6 44 37 04 f8 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 93 66 90 0f 00 2d 52 09 33 04 f4 <eb> 87 fa 48 89 f8 48 c1 e8 03 42 0f b6 04 30 84 c0 75 3f 0f b6 07
RSP: 0018:ffffc900000e73a0 EFLAGS: 00000046
RAX: 0000000000000003 RBX: ffff8881f6e27c40 RCX: ffffffff85007792
RDX: dffffc0000000000 RSI: 0000000000000003 RDI: ffff8881f6e27c40
RBP: ffffc900000e7430 R08: ffff8881f6e27c40 R09: 1ffff1103edc4f88
R10: dffffc0000000000 R11: ffffed103edc4f89 R12: 1ffff1103edc0001
R13: ffff8881f6e38cd4 R14: dffffc0000000000 R15: 1ffff9200001ce74
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000010000 CR3: 000000000700f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 pv_wait arch/x86/include/asm/paravirt.h:603 [inline]
 pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:470 [inline]
 __pv_queued_spin_lock_slowpath+0x690/0xc40 kernel/locking/qspinlock.c:511
 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:591 [inline]
 queued_spin_lock_slowpath+0x47/0x50 arch/x86/include/asm/qspinlock.h:51
 queued_spin_lock include/asm-generic/qspinlock.h:114 [inline]
 do_raw_spin_lock include/linux/spinlock.h:187 [inline]
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
 _raw_spin_lock_irqsave+0x120/0x130 kernel/locking/spinlock.c:162
 lock_timer_base+0x127/0x270 kernel/time/timer.c:1005
 __mod_timer+0xe5/0xc00 kernel/time/timer.c:1086
 add_timer+0x68/0x80 kernel/time/timer.c:1250
 __queue_delayed_work+0x173/0x200 kernel/workqueue.c:1686
 queue_delayed_work_on+0xe7/0x160 kernel/workqueue.c:1711
 queue_delayed_work include/linux/workqueue.h:525 [inline]
 schedule_delayed_monitor_work kernel/rcu/tree.c:3216 [inline]
 kvfree_call_rcu+0x44f/0x7c0 kernel/rcu/tree.c:3472
 trie_delete_elem+0x572/0x720 kernel/bpf/lpm_trie.c:545
 bpf_prog_3d1485d3268e5ad0+0x40/0x44
 bpf_dispatcher_nop_func include/linux/bpf.h:987 [inline]
 __bpf_prog_run include/linux/filter.h:607 [inline]
 bpf_prog_run include/linux/filter.h:614 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2283 [inline]
 bpf_trace_run3+0x123/0x2b0 kernel/trace/bpf_trace.c:2323
 __bpf_trace_timer_start+0x2b/0x40 include/trace/events/timer.h:53
 trace_timer_start include/trace/events/timer.h:53 [inline]
 enqueue_timer+0x337/0x480 kernel/time/timer.c:615
 internal_add_timer kernel/time/timer.c:640 [inline]
 __mod_timer+0x84c/0xc00 kernel/time/timer.c:1137
 schedule_timeout+0x154/0x340 kernel/time/timer.c:2019
 rcu_gp_fqs_loop+0x2e9/0x10c0 kernel/rcu/tree.c:1706
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:1905
 kthread+0x281/0x320 kernel/kthread.c:386
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>