watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz.5.118:7483] Modules linked in: irq event stamp: 43397 hardirqs last enabled at (43396): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (43396): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (43397): [] __el1_irq arch/arm64/kernel/entry-common.c:557 [inline] hardirqs last disabled at (43397): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:575 softirqs last enabled at (34188): [] softirq_handle_end kernel/softirq.c:400 [inline] softirqs last enabled at (34188): [] handle_softirqs+0xa38/0xbf8 kernel/softirq.c:582 softirqs last disabled at (37821): [] __do_softirq+0x14/0x20 kernel/softirq.c:588 CPU: 1 UID: 0 PID: 7483 Comm: syz.5.118 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : in_softirq_really kernel/kcov.c:171 [inline] pc : check_kcov_mode kernel/kcov.c:183 [inline] pc : __sanitizer_cov_trace_pc+0x28/0x84 kernel/kcov.c:217 lr : taprio_dequeue_tc_priority+0x164/0x640 net/sched/sch_taprio.c:787 sp : ffff800080017450 x29: ffff8000800174b0 x28: 0000000000000001 x27: 0000000000000000 x26: ffff0000ee154042 x25: 0000000000000009 x24: ffff0000ce3e8394 x23: 0000000000000008 x22: ffff0000ee154044 x21: 1fffe00019c7d072 x20: 1fffe0001dc2a808 x19: dfff800000000000 x18: ffff0000c80b2240 x17: 00000000ffff0000 x16: ffff800080585eb0 x15: 0000000000000001 x14: ffff80008f8d05e8 x13: dfff800000000000 x12: 00000000b0c45eaf x11: 000000009ae924d7 x10: 0000000000ff0100 x9 : 0000000000000303 x8 : ffff0000cb08dac0 x7 : ffff8000899bdf20 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 00000000ffffffff x2 : 0000000000000000 x1 : 0000000000000010 x0 : 000000000000000a Call trace: preempt_count arch/arm64/include/asm/preempt.h:13 [inline] (P) in_softirq_really kernel/kcov.c:171 [inline] (P) check_kcov_mode kernel/kcov.c:183 [inline] (P) __sanitizer_cov_trace_pc+0x28/0x84 kernel/kcov.c:217 (P) taprio_dequeue_tc_priority+0x164/0x640 net/sched/sch_taprio.c:787 (L) taprio_dequeue+0x174/0x508 dequeue_skb net/sched/sch_generic.c:293 [inline] qdisc_restart net/sched/sch_generic.c:398 [inline] __qdisc_run+0x1e0/0x2374 net/sched/sch_generic.c:416 __dev_xmit_skb net/core/dev.c:3894 [inline] __dev_queue_xmit+0xd40/0x3548 net/core/dev.c:4398 dev_queue_xmit include/linux/netdevice.h:3094 [inline] tipc_l2_send_msg+0x29c/0x35c net/tipc/bearer.c:516 tipc_bearer_xmit_skb+0x270/0x3c8 net/tipc/bearer.c:575 tipc_disc_timeout+0x500/0x640 net/tipc/discover.c:338 call_timer_fn+0x1b4/0x8f0 kernel/time/timer.c:1794 expire_timers kernel/time/timer.c:1845 [inline] __run_timers kernel/time/timer.c:2419 [inline] __run_timer_base+0x56c/0x7b4 kernel/time/timer.c:2430 run_timer_base kernel/time/timer.c:2439 [inline] run_timer_softirq+0xcc/0x194 kernel/time/timer.c:2449 handle_softirqs+0x2e0/0xbf8 kernel/softirq.c:554 __do_softirq+0x14/0x20 kernel/softirq.c:588 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:81 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:891 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:86 invoke_softirq kernel/softirq.c:435 [inline] __irq_exit_rcu+0x1d8/0x544 kernel/softirq.c:655 irq_exit_rcu+0x14/0x84 kernel/softirq.c:671 __el1_irq arch/arm64/kernel/entry-common.c:561 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:575 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:580 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:596 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:175 [inline] (P) arch_local_irq_restore arch/arm64/include/asm/irqflags.h:195 [inline] (P) __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] (P) _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 (P) __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] (L) _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 (L) spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1565 [inline] folio_batch_move_lru+0x30c/0x3c0 mm/swap.c:205 __folio_batch_add_and_move+0x3c4/0x630 mm/swap.c:227 folio_add_lru+0xec/0x1d4 mm/swap.c:513 shmem_alloc_and_add_folio+0xfdc/0x15b0 mm/shmem.c:1867 shmem_get_folio_gfp+0x568/0x179c mm/shmem.c:2330 shmem_get_folio mm/shmem.c:2436 [inline] shmem_write_begin+0x140/0x500 mm/shmem.c:3038 generic_perform_write+0x29c/0x868 mm/filemap.c:4054 shmem_file_write_iter+0x110/0x138 mm/shmem.c:3213 new_sync_write fs/read_write.c:590 [inline] vfs_write+0x920/0xcf4 fs/read_write.c:683 ksys_write+0x15c/0x26c fs/read_write.c:736 __do_sys_write fs/read_write.c:748 [inline] __se_sys_write fs/read_write.c:745 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:745 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 6817 Comm: kworker/u8:19 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 Workqueue: events_unbound toggle_allocation_gate pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:340 [inline] pc : smp_call_function_many_cond+0x1a9c/0x3418 kernel/smp.c:884 lr : csd_lock_wait kernel/smp.c:340 [inline] lr : smp_call_function_many_cond+0x1ab4/0x3418 kernel/smp.c:884 sp : ffff80009e1f7790 x29: ffff80009e1f78d0 x28: ffffffffffffffff x27: 1fffe000366c6551 x26: ffff0001b365b668 x25: 0000000000000001 x24: dfff800000000000 x23: 0000000000000008 x22: 0000000000000011 x21: 1fffe000366c6550 x20: ffff0001b3632a88 x19: ffff0001b3632a80 x18: dfff800000000000 x17: 00000000924fb699 x16: ffff8000831615b0 x15: 0000000000000001 x14: 1fffe000366cb6cd x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000366cb6ce x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : ffff800080061d44 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : ffff8000804d71f8 x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:231 [inline] (P) __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] (P) csd_lock_wait kernel/smp.c:340 [inline] (P) smp_call_function_many_cond+0x1a9c/0x3418 kernel/smp.c:884 (P) csd_lock_wait kernel/smp.c:340 [inline] (L) smp_call_function_many_cond+0x1ab4/0x3418 kernel/smp.c:884 (L) smp_call_function_many kernel/smp.c:908 [inline] smp_call_function kernel/smp.c:930 [inline] kick_all_cpus_sync+0x40/0xa0 kernel/smp.c:1075 arch_jump_label_transform_apply+0x14/0x20 arch/arm64/kernel/jump_label.c:34 __jump_label_update+0x30c/0x334 kernel/jump_label.c:521 jump_label_update+0x30c/0x3bc kernel/jump_label.c:920 static_key_enable_cpuslocked+0x140/0x230 kernel/jump_label.c:210 static_key_enable+0x24/0x38 kernel/jump_label.c:223 toggle_allocation_gate+0xc4/0x264 mm/kfence/core.c:849 process_one_work+0x7bc/0x1600 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x97c/0xeec kernel/workqueue.c:3391 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862