watchdog: BUG: soft lockup - CPU#1 stuck for 123s! [syz.0.223:6222] Modules linked in: irq event stamp: 10478443 hardirqs last enabled at (10478442): [] irqentry_exit+0x63/0x90 kernel/entry/common.c:357 hardirqs last disabled at (10478443): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1043 softirqs last enabled at (8990764): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last enabled at (8990764): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last enabled at (8990764): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 softirqs last disabled at (8990767): [] __do_softirq kernel/softirq.c:588 [inline] softirqs last disabled at (8990767): [] invoke_softirq kernel/softirq.c:428 [inline] softirqs last disabled at (8990767): [] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 CPU: 1 UID: 0 PID: 6222 Comm: syz.0.223 Not tainted 6.11.0-rc4-syzkaller-g872cf28b8df9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:lock_release+0x658/0xa30 kernel/locking/lockdep.c:5784 Code: 3c 3b 00 74 08 4c 89 f7 e8 15 d2 8a 00 f6 84 24 91 00 00 00 02 75 77 41 f7 c5 00 02 00 00 74 01 fb 48 c7 44 24 60 0e 36 e0 45 <4b> c7 04 27 00 00 00 00 4b c7 44 27 08 00 00 00 00 65 48 8b 04 25 RSP: 0018:ffffc90000a18620 EFLAGS: 00000206 RAX: 0000000000000001 RBX: 1ffff920001430d6 RCX: ffffc90000a18603 RDX: 0000000000000008 RSI: ffffffff8c0ae6e0 RDI: ffffffff8c606d40 RBP: ffffc90000a18750 R08: ffffffff9017f16f R09: 1ffffffff202fe2d R10: dffffc0000000000 R11: fffffbfff202fe2e R12: 1ffff920001430d0 R13: 0000000000000246 R14: ffffc90000a186b0 R15: dffffc0000000000 FS: 00007f48c5aa46c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd180dfef40 CR3: 0000000056446000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_lock_release include/linux/rcupdate.h:336 [inline] rcu_read_unlock include/linux/rcupdate.h:869 [inline] nf_hook+0x391/0x450 include/linux/netfilter.h:271 NF_HOOK_COND include/linux/netfilter.h:302 [inline] ip6_output+0x26f/0x3c0 net/ipv6/ip6_output.c:243 NF_HOOK include/linux/netfilter.h:314 [inline] ndisc_send_skb+0xab2/0x1380 net/ipv6/ndisc.c:511 addrconf_rs_timer+0x371/0x670 net/ipv6/addrconf.c:4040 call_timer_fn+0x18e/0x650 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2417 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2428 run_timer_base kernel/time/timer.c:2437 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2447 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__sanitizer_cov_trace_pc+0x46/0x70 kernel/kcov.c:221 Code: ff 00 74 11 81 fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00 00 83 fa 02 75 21 48 8b 91 00 16 00 00 48 8b 32 <48> 8d 7e 01 8b 89 fc 15 00 00 48 39 cf 73 08 48 89 3a 48 89 44 f2 RSP: 0018:ffffc90003f9f4b8 EFLAGS: 00000246 RAX: ffffffff84afe952 RBX: ffffffff8e296a40 RCX: ffff88801a741e00 RDX: ffffc900157cf000 RSI: 00000000000030b5 RDI: ffff8880b92462c0 RBP: ffffc90003f9f570 R08: ffffffff81873822 R09: 1ffffffff202fe2d R10: dffffc0000000000 R11: fffffbfff202fe2e R12: dffffc0000000000 R13: ffff8880b92462c0 R14: ffff8880b923fb80 R15: ffffc90003f9f500 llist_add_batch+0x82/0x270 lib/llist.c:28 llist_add include/linux/llist.h:248 [inline] smp_call_function_many_cond+0x7e2/0x29d0 kernel/smp.c:825 on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1023 on_each_cpu include/linux/smp.h:71 [inline] text_poke_sync arch/x86/kernel/alternative.c:2085 [inline] text_poke_bp_batch+0x726/0xb30 arch/x86/kernel/alternative.c:2357 text_poke_flush arch/x86/kernel/alternative.c:2486 [inline] text_poke_finish+0x30/0x50 arch/x86/kernel/alternative.c:2493 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 static_key_enable_cpuslocked+0x136/0x260 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 tracepoint_add_func+0x953/0x9e0 kernel/tracepoint.c:361 tracepoint_probe_register_prio kernel/tracepoint.c:511 [inline] tracepoint_probe_register+0x105/0x160 kernel/tracepoint.c:531 perf_trace_event_reg kernel/trace/trace_event_perf.c:129 [inline] perf_trace_event_init+0x478/0x930 kernel/trace/trace_event_perf.c:202 perf_trace_init+0x243/0x2e0 kernel/trace/trace_event_perf.c:226 perf_tp_event_init+0x8d/0x110 kernel/events/core.c:10245 perf_try_init_event+0x139/0x3f0 kernel/events/core.c:11720 perf_init_event kernel/events/core.c:11790 [inline] perf_event_alloc+0x131a/0x22d0 kernel/events/core.c:12070 __do_sys_perf_event_open kernel/events/core.c:12577 [inline] __se_sys_perf_event_open+0xb43/0x38d0 kernel/events/core.c:12468 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f48c4d79e79 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:00007f48c5aa4038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f48c4f16058 RCX: 00007f48c4d79e79 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00007f48c4de793e R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f48c4f16058 R15: 00007ffdc098e428 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6139 Comm: udevd Not tainted 6.11.0-rc4-syzkaller-g872cf28b8df9 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 RIP: 0010:__preempt_count_add kernel/rcu/tree.c:722 [inline] RIP: 0010:rcu_is_watching+0x6/0xb0 kernel/rcu/tree.c:725 Code: 80 e8 4e f5 3c 0a 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 41 57 <41> 56 53 65 ff 05 88 12 8a 7e e8 7b 13 3d 0a 89 c3 83 f8 08 73 7a RSP: 0018:ffffc90002f47a50 EFLAGS: 00000257 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffffff816fce94 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff9017f168 RBP: ffffc90002f47bc0 R08: ffffffff9017f16f R09: 1ffffffff202fe2d R10: dffffc0000000000 R11: fffffbfff202fe2e R12: 1ffff920005e8f54 R13: dffffc0000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007ffb111acc80(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005578b966c038 CR3: 000000002a538000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0xe3/0x550 kernel/locking/lockdep.c:5730 rcu_lock_acquire include/linux/rcupdate.h:326 [inline] rcu_read_lock include/linux/rcupdate.h:838 [inline] __lock_task_sighand+0x49/0x2d0 kernel/signal.c:1395 lock_task_sighand include/linux/sched/signal.h:746 [inline] do_send_sig_info kernel/signal.c:1300 [inline] group_send_sig_info+0x274/0x310 kernel/signal.c:1451 bpf_send_signal_common+0x2dd/0x430 kernel/trace/bpf_trace.c:881 ____bpf_send_signal kernel/trace/bpf_trace.c:886 [inline] bpf_send_signal+0x19/0x30 kernel/trace/bpf_trace.c:884 bpf_prog_7ba5217f62dcd359+0x40/0x44 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline] __bpf_prog_run include/linux/filter.h:691 [inline] bpf_prog_run include/linux/filter.h:698 [inline] __bpf_trace_run kernel/trace/bpf_trace.c:2406 [inline] bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2447 trace_sys_enter+0x93/0xd0 include/trace/events/syscalls.h:18 syscall_trace_enter+0xf8/0x150 kernel/entry/common.c:61 syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline] syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline] do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ffb10d23457 Code: 73 01 c3 48 8b 0d d1 d9 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 e8 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 76 48 8b 15 a2 d9 0c 00 f7 d8 64 89 02 48 83 RSP: 002b:00007fff196b5078 EFLAGS: 00000246 ORIG_RAX: 00000000000000e8 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffb10d23457 RDX: 0000000000000004 RSI: 00007fff196b50b8 RDI: 0000000000000004 RBP: 00007fff196b50c4 R08: 0000000000000007 R09: 503c17719cb1fda9 R10: 00000000ffffffff R11: 0000000000000246 R12: 0000557d36b12ea0 R13: 00007fff196b50b8 R14: 0000000000000001 R15: 0000557d36aeb910