watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.4.549:7675] Modules linked in: irq event stamp: 188926 hardirqs last enabled at (188925): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:214 hardirqs last disabled at (188926): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1052 softirqs last enabled at (188922): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (188922): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (188922): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 softirqs last disabled at (188901): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (188901): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (188901): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:723 CPU: 0 UID: 0 PID: 7675 Comm: syz.4.549 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0xd33/0x12d0 kernel/smp.c:877 Code: 45 8b 2c 24 44 89 ee 83 e6 01 31 ff e8 a6 73 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 51 6f 0b 00 eb 38 f3 90 <42> 0f b6 04 2b 84 c0 75 11 41 f7 04 24 01 00 00 00 74 1e e8 35 6f RSP: 0018:ffffc9000c607540 EFLAGS: 00000246 RAX: ffffffff81b306bb RBX: 1ffff11017127f61 RCX: 0000000000080000 RDX: ffffc9000d14a000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: ffffc9000c6076c0 R08: ffffffff8f5cd637 R09: 1ffffffff1eb9ac6 R10: dffffc0000000000 R11: fffffbfff1eb9ac7 R12: ffff8880b893fb08 R13: dffffc0000000000 R14: ffff8880b883b1c0 R15: 0000000000000001 FS: 00007fd5523826c0(0000) GS:ffff888126372000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f675c5156c0 CR3: 000000007cf66000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1043 __flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline] flush_tlb_mm_range+0x6b1/0x12d0 arch/x86/mm/tlb.c:1451 dup_mmap+0x15a0/0x1ac0 mm/mmap.c:1873 dup_mm kernel/fork.c:1486 [inline] copy_mm+0x13c/0x4b0 kernel/fork.c:1538 copy_process+0x1706/0x3c00 kernel/fork.c:2180 kernel_clone+0x21e/0x840 kernel/fork.c:2610 __do_sys_clone kernel/fork.c:2753 [inline] __se_sys_clone kernel/fork.c:2737 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2737 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd55158eec9 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:00007fd552381fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007fd5517e5fa0 RCX: 00007fd55158eec9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007fd551611f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fd5517e6038 R14: 00007fd5517e5fa0 R15: 00007ffc443babb8 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7669 Comm: syz.1.547 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:hlist_empty include/linux/list.h:972 [inline] RIP: 0010:do_perf_trace_lock_acquire include/trace/events/lock.h:24 [inline] RIP: 0010:perf_trace_lock_acquire+0x16b/0x410 include/trace/events/lock.h:24 Code: 08 4c 89 f7 e8 36 c9 87 00 49 83 3e 00 75 25 48 8b 5c 24 08 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 15 c9 87 00 <48> 83 3b 00 0f 84 c9 01 00 00 48 8d 74 24 60 48 8d 94 24 80 00 00 RSP: 0000:ffffc9000c597600 EFLAGS: 00000046 RAX: 1ffffd1ffffa6bbe RBX: ffffe8ffffd35df0 RCX: ffffe8ffffd35df0 RDX: 0000000000000000 RSI: ffffffff8b9ec3c0 RDI: ffffffff8b9ec380 RBP: ffffc9000c597700 R08: 0000000000000000 R09: 0000000000000001 R10: dffffc0000000000 R11: ffffed1017124f59 R12: 1ffff920018b2ec8 R13: 0000000000000012 R14: ffffffff8dc096e8 R15: dffffc0000000000 FS: 00007f4a822536c0(0000) GS:ffff888126472000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c380de2 CR3: 000000007cfc0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000200000000300 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __do_trace_lock_acquire include/trace/events/lock.h:24 [inline] trace_lock_acquire include/trace/events/lock.h:24 [inline] lock_acquire+0x311/0x360 kernel/locking/lockdep.c:5831 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xa7/0xf0 kernel/locking/spinlock.c:162 lock_hrtimer_base kernel/time/hrtimer.c:164 [inline] hrtimer_try_to_cancel+0x22b/0x420 kernel/time/hrtimer.c:1355 hrtimer_cancel+0x3b/0x50 kernel/time/hrtimer.c:1481 perf_swevent_cancel_hrtimer kernel/events/core.c:11830 [inline] cpu_clock_event_stop+0xd9/0x130 kernel/events/core.c:11880 __perf_event_overflow+0x580/0xe40 kernel/events/core.c:10346 perf_swevent_hrtimer+0x3b8/0x500 kernel/events/core.c:11786 __run_hrtimer kernel/time/hrtimer.c:1777 [inline] __hrtimer_run_queues+0x4dd/0xc60 kernel/time/hrtimer.c:1841 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1903 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1058 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline] sysvec_apic_timer_interrupt+0x52/0xc0 arch/x86/kernel/apic/apic.c:1052 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0033:0x7f4a8138eec9 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:00007f4a822530e8 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00007f4a815e5fa8 RCX: 00007f4a8138eec9 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f4a815e5fa8 RBP: 00007f4a815e5fa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f4a815e6038 R14: 00007ffd1ca62270 R15: 00007ffd1ca62358