watchdog: BUG: soft lockup - CPU#1 stuck for 246s! [kworker/u8:10:3335] Modules linked in: irq event stamp: 4297072 hardirqs last enabled at (4297071): [] irqentry_exit_to_kernel_mode_after_preempt include/linux/irq-entry-common.h:507 [inline] hardirqs last enabled at (4297071): [] irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:542 [inline] hardirqs last enabled at (4297071): [] irqentry_exit+0x24d/0x7e0 kernel/entry/common.c:164 hardirqs last disabled at (4297072): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1061 softirqs last enabled at (4297064): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last enabled at (4297064): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last enabled at (4297064): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 softirqs last disabled at (4296897): [] __do_softirq kernel/softirq.c:656 [inline] softirqs last disabled at (4296897): [] invoke_softirq kernel/softirq.c:496 [inline] softirqs last disabled at (4296897): [] __irq_exit_rcu+0x162/0x210 kernel/softirq.c:735 CPU: 1 UID: 0 PID: 3335 Comm: kworker/u8:10 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:csd_lock_wait kernel/smp.c:342 [inline] RIP: 0010:smp_call_function_many_cond+0x5b0/0x1700 kernel/smp.c:892 Code: 00 f3 90 41 0f b6 45 00 41 38 c4 7c 08 84 c0 0f 85 63 0f 00 00 8b 45 08 31 ff 83 e0 01 41 89 c6 89 c6 e8 b3 7e 0c 00 45 85 f6 <75> d0 e8 f9 83 0c 00 e8 f4 83 0c 00 83 c3 01 bf 07 00 00 00 48 63 RSP: 0018:ffffc9000bf1f870 EFLAGS: 00000202 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff81fc0cbd RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff888034e0bd80 RBP: ffff8880b8443180 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000003 R13: ffffed1017088631 R14: 0000000000000001 R15: ffff8880b853c700 FS: 0000000000000000(0000) GS:ffff88812446a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc856b3a18b CR3: 000000000e596000 CR4: 0000000000350ef0 Call Trace: on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1057 on_each_cpu include/linux/smp.h:72 [inline] smp_text_poke_sync_each_cpu arch/x86/kernel/alternative.c:2773 [inline] smp_text_poke_batch_finish+0x337/0xc60 arch/x86/kernel/alternative.c:2983 arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146 jump_label_update+0x37a/0x550 kernel/jump_label.c:910 static_key_enable_cpuslocked+0x1bc/0x270 kernel/jump_label.c:210 static_key_enable+0x1a/0x20 kernel/jump_label.c:223 toggle_allocation_gate mm/kfence/core.c:906 [inline] toggle_allocation_gate+0xfe/0x2d0 mm/kfence/core.c:898 process_one_work+0xa0e/0x1980 kernel/workqueue.c:3314 process_scheduled_works kernel/workqueue.c:3397 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3478 kthread+0x370/0x450 kernel/kthread.c:436 ret_from_fork+0x72b/0xd50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 20409 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026 RIP: 0010:__rcu_read_unlock+0x0/0x5e0 kernel/rcu/tree_plugin.h:431 Code: f8 e8 d4 6c ff ff 48 89 df 5b e9 8b f0 ff ff e8 a6 95 87 00 eb e7 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 41 57 41 56 41 55 41 54 55 53 65 48 8b 1d d2 92 1d 12 RSP: 0018:ffffc90000007dd0 EFLAGS: 00000082 RAX: 0000000000000000 RBX: 0000000000000001 RCX: ffffc90000007d9c RDX: 0000000000000002 RSI: ffffffff8defce44 RDI: ffffffff8c1c4480 RBP: ffff888030972000 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: 18b316a478fbdcfd R14: ffff888030972c00 R15: ffff888030972c00 FS: 0000555566492500(0000) GS:ffff88812436a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c3bd58b CR3: 000000008df4a000 CR4: 0000000000350ef0 Call Trace: rcu_read_unlock include/linux/rcupdate.h:871 [inline] advance_sched+0x775/0xd20 net/sched/sch_taprio.c:994 __run_hrtimer kernel/time/hrtimer.c:1930 [inline] __hrtimer_run_queues+0x470/0xa00 kernel/time/hrtimer.c:1994 hrtimer_interrupt+0x3e5/0x940 kernel/time/hrtimer.c:2113 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline] __sysvec_apic_timer_interrupt+0x10b/0x460 arch/x86/kernel/apic/apic.c:1067 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1061 [inline] sysvec_apic_timer_interrupt+0x9e/0xc0 arch/x86/kernel/apic/apic.c:1061 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:xa_entry include/linux/xarray.h:1226 [inline] RIP: 0010:xas_reload include/linux/xarray.h:1624 [inline] RIP: 0010:find_get_entry mm/filemap.c:2085 [inline] RIP: 0010:find_lock_entries+0x2df/0x1190 mm/filemap.c:2172 Code: 44 24 28 4b 8d 7c e5 28 48 89 f8 48 c1 e8 03 42 80 3c 38 00 0f 85 23 0d 00 00 49 83 c4 04 4f 8b 64 e5 08 e8 c3 42 45 09 31 ff <41> 89 c6 89 c6 e8 f7 db c3 ff 45 85 f6 0f 85 37 05 00 00 e8 39 e1 RSP: 0018:ffffc90006527678 EFLAGS: 00000246 RAX: 0000000000000001 RBX: ffffea0002609800 RCX: 0000000000000000 RDX: ffff888020711ec0 RSI: ffffffff8244af34 RDI: 0000000000000000 RBP: ffffea0002609834 R08: 0000000000000001 R09: 000000000000003f R10: 0000000000000000 R11: 0000000000000000 R12: ffffea0002609800 R13: ffff88802b7cd8c0 R14: 0000000000000000 R15: dffffc0000000000 shmem_undo_range+0x212/0x1570 mm/shmem.c:1131 shmem_truncate_range mm/shmem.c:1277 [inline] shmem_evict_inode+0x3f3/0xc40 mm/shmem.c:1407 evict+0x3c2/0xad0 fs/inode.c:841 iput_final fs/inode.c:1960 [inline] iput.part.0+0x605/0xf50 fs/inode.c:2009 iput+0x35/0x40 fs/inode.c:1975 filename_unlinkat+0x466/0x730 fs/namei.c:5572 __do_sys_unlink fs/namei.c:5603 [inline] __se_sys_unlink fs/namei.c:5600 [inline] __x64_sys_unlink+0x46/0x70 fs/namei.c:5600 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x10b/0x860 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f522279bf47 Code: 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007fffa5513518 EFLAGS: 00000206 ORIG_RAX: 0000000000000057 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f522279bf47 RDX: 00007fffa5513540 RSI: 00007fffa55135d0 RDI: 00007fffa55135d0 RBP: 00007fffa55135d0 R08: 00007fffa55145d0 R09: 00000000ffffffff R10: 0000000000000100 R11: 0000000000000206 R12: 00007fffa5514660 R13: 00007f52228321ca R14: 00000000000e99cc R15: 00007fffa55146a0