watchdog: BUG: soft lockup - CPU#0 stuck for 143s! [syz.3.1245:10604] Modules linked in: irq event stamp: 1371018 hardirqs last enabled at (1371017): [] irqentry_exit+0x74/0x90 kernel/entry/common.c:200 hardirqs last disabled at (1371018): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050 softirqs last enabled at (1371014): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last enabled at (1371014): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last enabled at (1371014): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 softirqs last disabled at (1371005): [] __do_softirq kernel/softirq.c:613 [inline] softirqs last disabled at (1371005): [] invoke_softirq kernel/softirq.c:453 [inline] softirqs last disabled at (1371005): [] __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680 CPU: 0 UID: 0 PID: 10604 Comm: syz.3.1245 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 86 63 0b 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 31 5f 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 15 5f RSP: 0018:ffffc90003cff700 EFLAGS: 00000246 RAX: ffffffff81b45bdb RBX: 1ffff110170e7f59 RCX: 0000000000080000 RDX: ffffc9000c7ee000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: ffffc90003cff880 R08: ffffffff8fa3a737 R09: 1ffffffff1f474e6 R10: dffffc0000000000 R11: fffffbfff1f474e7 R12: ffff8880b873fac8 R13: dffffc0000000000 R14: ffff8880b863b180 R15: 0000000000000001 FS: 00007fc8414be6c0(0000) GS:ffff888125c12000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc8414bce40 CR3: 0000000079568000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: on_each_cpu_cond_mask+0x3f/0x80 kernel/smp.c:1044 __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 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:490 [inline] tlb_flush_mmu+0x1a7/0x680 mm/mmu_gather.c:403 tlb_finish_mmu+0xc3/0x1d0 mm/mmu_gather.c:497 change_prot_numa+0x32a/0x3d0 mm/mempolicy.c:829 task_numa_work+0xdc5/0x1590 kernel/sched/fair.c:3478 task_work_run+0x1d4/0x260 kernel/task_work.c:227 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline] do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc8405b7600 Code: 83 c0 16 83 e0 f7 74 12 50 48 8d 3d ca 3c 08 00 e8 d5 8e f8 ff 0f 1f 44 00 00 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <83> ff 21 74 0b c3 66 2e 0f 1f 84 00 00 00 00 00 55 53 48 89 f3 48 RSP: 002b:00007fc8414bcc78 EFLAGS: 00000283 RAX: 0000000000000000 RBX: 00007fc8414bdd30 RCX: 00007fc8407a8120 RDX: 00007fc8414bcc80 RSI: 00007fc8414bcdb0 RDI: 0000000000000021 RBP: 000000000000000b R08: 0000000000000000 R09: 0000000000000000 R10: 00000000ffffffff R11: 0000000000000000 R12: 0000000000000073 R13: 00007fc8414bdeb0 R14: 9999999999999999 R15: 0000000000000000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 10600 Comm: syz.2.1246 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 RIP: 0010:hrtimer_cancel+0x33/0x50 kernel/time/hrtimer.c:1488 Code: e8 a2 14 12 00 48 89 df e8 9a f9 ff ff 89 c5 31 ff 89 c6 e8 cf 18 12 00 85 ed 78 0c e8 86 14 12 00 eb 1a e8 7f 14 12 00 f3 90 <48> 89 df e8 75 f9 ff ff 85 c0 78 ed 89 c5 e8 6a 14 12 00 89 e8 5b RSP: 0018:ffffc90000a08990 EFLAGS: 00000006 RAX: ffffffff81ada671 RBX: ffff888025bf4628 RCX: ffff88807d1d0000 RDX: 0000000000010000 RSI: 0000000000000004 RDI: 00000000ffffffff RBP: 00000000ffffffff R08: ffff8880b8727a83 R09: 1ffff110170e4f50 R10: dffffc0000000000 R11: ffffed10170e4f51 R12: ffff888025bf46d0 R13: dffffc0000000000 R14: ffff888025bf4628 R15: ffffffffffffdba9 FS: 00007fa133fc46c0(0000) GS:ffff888125d12000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100000000 CR3: 0000000053e2e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: perf_swevent_cancel_hrtimer kernel/events/core.c:11813 [inline] cpu_clock_event_stop+0xd9/0x130 kernel/events/core.c:11863 __perf_event_overflow+0x57d/0xe40 kernel/events/core.c:10333 perf_swevent_hrtimer+0x3c5/0x550 kernel/events/core.c:11769 __run_hrtimer kernel/time/hrtimer.c:1761 [inline] __hrtimer_run_queues+0x4e0/0xc60 kernel/time/hrtimer.c:1825 hrtimer_interrupt+0x45b/0xaa0 kernel/time/hrtimer.c:1887 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline] __sysvec_apic_timer_interrupt+0x108/0x410 arch/x86/kernel/apic/apic.c:1056 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1050 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:instrument_atomic_read include/linux/instrumented.h:68 [inline] RIP: 0010:atomic_long_read include/linux/atomic/atomic-instrumented.h:3188 [inline] RIP: 0010:__mutex_owner kernel/locking/mutex.h:47 [inline] RIP: 0010:mutex_spin_on_owner+0x27b/0x360 kernel/locking/mutex.c:347 Code: be 08 00 00 00 e8 75 4c 86 00 42 80 7c 35 00 00 74 08 4c 89 e7 e8 f5 49 86 00 49 f7 04 24 01 00 00 00 0f 85 8c 00 00 00 f3 90 <4c> 89 e7 be 08 00 00 00 e8 48 4c 86 00 42 80 7c 35 00 00 0f 84 90 RSP: 0018:ffffc900038af428 EFLAGS: 00000246 RAX: 1ffff1100fa3a000 RBX: ffffffff8f53a170 RCX: ffffffff819cee58 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000000 RBP: 1ffffffff1ea7424 R08: ffffffff8f53a127 R09: 1ffffffff1ea7424 R10: dffffc0000000000 R11: fffffbfff1ea7425 R12: ffffffff8f53a120 R13: ffffffff8f53a170 R14: dffffc0000000000 R15: ffff888057399e00 mutex_optimistic_spin kernel/locking/mutex.c:464 [inline] __mutex_lock_common kernel/locking/mutex.c:703 [inline] __mutex_lock+0x9ba/0x1350 kernel/locking/mutex.c:760 rtnl_lock net/core/rtnetlink.c:80 [inline] rtnetlink_rcv_msg+0x71c/0xb70 net/core/rtnetlink.c:6952 netlink_rcv_skb+0x205/0x470 net/netlink/af_netlink.c:2552 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x82f/0x9e0 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1896 sock_sendmsg_nosec net/socket.c:714 [inline] __sock_sendmsg+0x219/0x270 net/socket.c:729 sock_write_iter+0x258/0x330 net/socket.c:1179 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x5c6/0xb30 fs/read_write.c:686 ksys_write+0x145/0x250 fs/read_write.c:738 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: 0033:0x7fa13318eec9 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:00007fa133fc4038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007fa1333e5fa0 RCX: 00007fa13318eec9 RDX: 000000000000fe33 RSI: 0000200000000040 RDI: 0000000000000005 RBP: 00007fa133211f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa1333e6038 R14: 00007fa1333e5fa0 R15: 00007ffe6ccb7358