watchdog: BUG: soft lockup - CPU#1 stuck for 143s! [syz.3.2471:17878] Modules linked in: irq event stamp: 13821273 hardirqs last enabled at (13821272): [] irqentry_exit+0x59e/0x620 kernel/entry/common.c:242 hardirqs last disabled at (13821273): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1056 softirqs last enabled at (8650570): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (8650570): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (8650570): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 softirqs last disabled at (8650573): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (8650573): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (8650573): [] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 CPU: 1 UID: 0 PID: 17878 Comm: syz.3.2471 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:kcov_remote_stop+0x28/0x6b0 kernel/kcov.c:1082 Code: 90 90 f3 0f 1e fa 55 41 57 41 56 41 55 41 54 53 48 83 ec 30 65 4c 8b 35 3e 22 56 11 65 8b 05 5f 22 56 11 a9 00 00 ff 00 74 14 <48> 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 9c 5b RSP: 0018:ffffc90000a08af8 EFLAGS: 00000206 RAX: 0000000000000002 RBX: 0000000000000246 RCX: 0000000000000101 RDX: 0000000000000002 RSI: ffffffff8def2969 RDI: ffffffff8c27ab00 RBP: ffffc90000a08db0 R08: ffffffff901181b7 R09: 1ffffffff2023036 R10: dffffc0000000000 R11: fffffbfff2023037 R12: ffffffff81c59e19 R13: dffffc0000000000 R14: ffff8880462f5ac0 R15: ffff8880b8728f08 FS: 00007f551a0926c0(0000) GS:ffff888125564000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c314979 CR3: 0000000078580000 CR4: 00000000003526f0 DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: ieee80211_rx_list+0x2bad/0x3710 net/mac80211/rx.c:5591 ieee80211_rx_napi+0x1b1/0x3e0 net/mac80211/rx.c:5611 ieee80211_rx include/net/mac80211.h:5267 [inline] ieee80211_handle_queued_frames+0xe8/0x1e0 net/mac80211/main.c:452 tasklet_action_common+0x2da/0x4b0 kernel/softirq.c:925 handle_softirqs+0x22a/0x870 kernel/softirq.c:622 __do_softirq kernel/softirq.c:656 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x5f/0x150 kernel/softirq.c:723 irq_exit_rcu+0x9/0x30 kernel/softirq.c:739 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:preempt_schedule_irq+0x48/0xa0 kernel/sched/core.c:7234 Code: 49 be 00 00 00 00 00 fc ff df eb 09 48 f7 03 10 00 00 00 74 53 bf 01 00 00 00 e8 93 80 e5 f5 e8 ee 0a 1f f6 fb bf 01 00 00 00 53 a6 ff ff 9c 58 fa a9 00 02 00 00 74 05 e8 c4 0c 1f f6 bf 01 RSP: 0018:ffffc90004467a50 EFLAGS: 00000206 RAX: 00000000000005bb RBX: ffff8880462f5ac0 RCX: 0000000000000001 RDX: 0000000000000006 RSI: ffffffff8def2969 RDI: 0000000000000001 RBP: 0000000000000000 R08: ffffffff901181b7 R09: 1ffffffff2023036 R10: dffffc0000000000 R11: fffffbfff2023037 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000000 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:lock_release+0x8c/0x3d0 kernel/locking/lockdep.c:5881 Code: 05 c9 59 7a 11 85 c0 0f 85 0d 02 00 00 65 4c 8b 3d 11 14 7a 11 41 83 bf 14 0b 00 00 00 0f 85 f7 01 00 00 49 81 3e 20 94 df 93 <0f> 84 ea 01 00 00 9c 5b fa 48 c7 c7 a0 bd f0 8d e8 9f a1 0b 0a 65 RSP: 0018:ffffc90004467b78 EFLAGS: 00000202 RAX: 0000000000000000 RBX: ffff8880462f5ac0 RCX: 0000000080000001 RDX: 0000000000000006 RSI: ffffffff8c27aae0 RDI: ffffffff8c27aaa0 RBP: ffffc90004467cf0 R08: ffffffff901181b7 R09: 1ffffffff2023036 R10: dffffc0000000000 R11: fffffbfff2023037 R12: 1ffff9200088cf84 R13: ffffffff81f94b51 R14: ffff8880847290a8 R15: ffff8880462f5ac0 __mutex_unlock_slowpath+0xd3/0x7d0 kernel/locking/mutex.c:938 __do_sys_perf_event_open kernel/events/core.c:14128 [inline] __se_sys_perf_event_open+0x1941/0x1d60 kernel/events/core.c:13767 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f551919c799 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:00007f551a092028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f5519415fa0 RCX: 00007f551919c799 RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 00002000000003c0 RBP: 00007f5519232bd9 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000 R13: 00007f5519416038 R14: 00007f5519415fa0 R15: 00007ffead259c78 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 15 Comm: ksoftirqd/0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 RIP: 0010:check_preemption_disabled+0x14/0xe0 lib/smp_processor_id.c:16 Code: 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 55 41 57 41 56 53 65 8b 05 57 73 6e 07 65 8b 0d 4c 73 6e 07 c1 ff ff ff 7f 74 0c 5b 41 5e 41 5f 5d c3 cc cc cc cc cc 9c 59 RSP: 0018:ffffc900001479e8 EFLAGS: 00000082 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000080000102 RDX: ffff88801daa9e40 RSI: ffffffff8c27aae0 RDI: ffffffff8c27aaa0 RBP: ffffc90000147b58 R08: ffffc90000147aef R09: 0000000000000000 R10: ffffc90000147ae0 R11: fffff52000028f5e R12: ffff88823beba000 R13: dffffc0000000000 R14: 1ffff92000028f58 R15: ffffffff8e7cd6c8 FS: 0000000000000000(0000) GS:ffff888125464000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000555bfae30608 CR3: 000000007fbb2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: rcu_lockdep_current_cpu_online+0x37/0x120 kernel/rcu/tree.c:4040 rcu_read_lock_held_common kernel/rcu/update.c:113 [inline] rcu_read_lock_held+0x1e/0x50 kernel/rcu/update.c:349 bpf_prog_run_array include/linux/bpf.h:2459 [inline] trace_call_bpf+0x1fa/0xb70 kernel/trace/bpf_trace.c:145 perf_trace_run_bpf_submit+0x78/0x170 kernel/events/core.c:11301 do_perf_trace_preemptirq_template include/trace/events/preemptirq.h:14 [inline] perf_trace_preemptirq_template+0x26f/0x350 include/trace/events/preemptirq.h:14 __do_trace_irq_disable include/trace/events/preemptirq.h:36 [inline] trace_irq_disable+0x110/0x150 include/trace/events/preemptirq.h:36 handle_softirqs+0x5c8/0x870 kernel/softirq.c:637 run_ksoftirqd+0x36/0x60 kernel/softirq.c:1063 smpboot_thread_fn+0x541/0xa50 kernel/smpboot.c:160 kthread+0x388/0x470 kernel/kthread.c:467 ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245