watchdog: BUG: soft lockup - CPU#0 stuck for 115s! [kworker/0:6:5755] Modules linked in: irq event stamp: 1783700 hardirqs last enabled at (1783699): [] native_save_fl arch/x86/include/asm/irqflags.h:26 [inline] hardirqs last enabled at (1783699): [] arch_local_save_flags arch/x86/include/asm/irqflags.h:109 [inline] hardirqs last enabled at (1783699): [] arch_irqs_disabled arch/x86/include/asm/irqflags.h:151 [inline] hardirqs last enabled at (1783699): [] seqcount_lockdep_reader_access+0xaa/0x100 include/linux/seqlock.h:75 hardirqs last disabled at (1783700): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1062 softirqs last enabled at (1772574): [] spin_unlock_bh include/linux/spinlock.h:407 [inline] softirqs last enabled at (1772574): [] ptr_ring_consume_bh include/linux/ptr_ring.h:399 [inline] softirqs last enabled at (1772574): [] wg_packet_decrypt_worker+0xd24/0xda0 drivers/net/wireguard/receive.c:499 softirqs last disabled at (1772572): [] spin_lock_bh include/linux/spinlock.h:353 [inline] softirqs last disabled at (1772572): [] ptr_ring_consume_bh include/linux/ptr_ring.h:397 [inline] softirqs last disabled at (1772572): [] wg_packet_decrypt_worker+0x90f/0xda0 drivers/net/wireguard/receive.c:499 CPU: 0 UID: 0 PID: 5755 Comm: kworker/0:6 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 Workqueue: events_power_efficient gc_worker RIP: 0010:lock_is_held_type+0x3f/0x150 kernel/locking/lockdep.c:6009 Code: 46 9b 93 04 00 0f 84 e4 00 00 00 65 8b 05 71 ed ae 07 85 c0 0f 85 d5 00 00 00 65 4c 8b 2d b1 a8 ae 07 41 83 bd a4 0b 00 00 00 <0f> 85 bf 00 00 00 89 f5 49 89 fe 9c 41 5c fa 48 c7 c7 10 2e 43 8e RSP: 0018:ffffc900046078f0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 00000000ffffffff RCX: ffff888079060000 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8ed5cb40 RBP: ffffc90004607ad0 R08: ffffffff907a717f R09: 1ffffffff20f4e2f R10: dffffc0000000000 R11: fffffbfff20f4e30 R12: dffffc0000000000 R13: ffff888079060000 R14: 0000000000000001 R15: 000000000000753f FS: 0000000000000000(0000) GS:ffff888124cc5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000000 CR3: 000000002b738000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: lock_is_held include/linux/lockdep.h:249 [inline] __might_resched+0x37/0x4c0 kernel/sched/core.c:9226 gc_worker+0x109c/0x1890 net/netfilter/nf_conntrack_core.c:1610 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 5616 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026 RIP: 0010:csd_lock_wait kernel/smp.c:363 [inline] RIP: 0010:smp_call_function_many_cond+0x1132/0x1500 kernel/smp.c:1002 Code: 78 44 8b 2b 44 89 ee 83 e6 01 31 ff e8 27 4b 0c 00 41 83 e5 01 49 bd 00 00 00 00 00 fc ff df 75 07 e8 12 46 0c 00 eb 35 f3 90 <43> 0f b6 04 2c 84 c0 75 0f f7 03 01 00 00 00 74 1d e8 f8 45 0c 00 RSP: 0018:ffffc90003a47320 EFLAGS: 00000293 RAX: ffffffff81bbb718 RBX: ffff8880b8643708 RCX: ffff888032c9ddc0 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: ffffc90003a47470 R08: ffffffff907a717f R09: 1ffffffff20f4e2f R10: dffffc0000000000 R11: fffffbfff20f4e30 R12: 1ffff110170c86e1 R13: dffffc0000000000 R14: 1ffff11006593e6b R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff888124dc5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f199e3dbe80 CR3: 000000001274e000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: __flush_tlb_multi arch/x86/include/asm/paravirt.h:46 [inline] flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline] flush_tlb_mm_range+0x8ff/0x1090 arch/x86/mm/tlb.c:1435 tlb_flush arch/x86/include/asm/tlb.h:23 [inline] tlb_flush_mmu_tlbonly include/asm-generic/tlb.h:509 [inline] tlb_flush_mmu+0x1af/0xa30 mm/mmu_gather.c:423 tlb_finish_mmu+0xf4/0x220 mm/mmu_gather.c:549 free_ldt_pgtables+0x192/0x360 arch/x86/kernel/ldt.c:411 arch_exit_mmap arch/x86/include/asm/mmu_context.h:229 [inline] exit_mmap+0x1bf/0x9f0 mm/mmap.c:1300 __mmput+0x118/0x420 kernel/fork.c:1193 exit_mm+0x221/0x2d0 kernel/exit.c:618 do_exit+0x6cd/0x2360 kernel/exit.c:1000 do_group_exit+0x22d/0x2f0 kernel/exit.c:1155 get_signal+0x121b/0x12c0 kernel/signal.c:3112 arch_do_signal_or_restart+0xbb/0x860 arch/x86/kernel/signal.c:337 __exit_to_user_mode_loop kernel/entry/common.c:66 [inline] exit_to_user_mode_loop+0x10e/0x770 kernel/entry/common.c:101 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:343 [inline] do_syscall_64+0x328/0x520 arch/x86/entry/syscall_64.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc1a91592d7 Code: Unable to access opcode bytes at 0x7fc1a91592ad. RSP: 002b:00007ffc9d045ac0 EFLAGS: 00000202 ORIG_RAX: 000000000000003d RAX: fffffffffffffe00 RBX: 0000555562366500 RCX: 00007fc1a91592d7 RDX: 0000000040000000 RSI: 00007ffc9d045b1c RDI: ffffffffffffffff RBP: 00007ffc9d045b1c R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000008 R13: 0000000000000003 R14: 00007ffc9d045d78 R15: 0000000000000000