watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:9611] Modules linked in: irq event stamp: 47255 hardirqs last enabled at (47254): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:84 [inline] hardirqs last enabled at (47254): [] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:94 hardirqs last disabled at (47255): [] __el1_irq arch/arm64/kernel/entry-common.c:470 [inline] hardirqs last disabled at (47255): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:488 softirqs last enabled at (36866): [] softirq_handle_end kernel/softirq.c:414 [inline] softirqs last enabled at (36866): [] __do_softirq+0xac0/0xd54 kernel/softirq.c:600 softirqs last disabled at (41469): [] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 CPU: 1 PID: 9611 Comm: syz-executor.3 Not tainted 6.4.0-rc4-syzkaller-g3bb1a3e1674b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 pstate: 20400005 (nzCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : fq_pie_qdisc_dequeue+0x10c/0x8ac net/sched/sch_fq_pie.c:246 lr : fq_pie_qdisc_dequeue+0xe4/0x8ac net/sched/sch_fq_pie.c:240 sp : ffff800080017210 x29: ffff800080017280 x28: ffff000124dfa140 x27: ffff00011e3052e8 x26: ffff00011e3052f0 x25: dfff800000000000 x24: ffff00011e3052e0 x23: ffff000124dfa130 x22: 0000000000000040 x21: 1fffe000249bf426 x20: ffff00011e3052e0 x19: ffff00011e3052e0 x18: 1ffff00010002ddb x17: 0000000000000000 x16: ffff80008050a9f0 x15: 0000000000000303 x14: 0000000000000100 x13: 0000000000000000 x12: 0000000000000001 x11: 0000000000000303 x10: 0000000000000100 x9 : 0000000000000000 x8 : 0000000000000000 x7 : ffff80008041beec x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff00011e3052e0 x1 : ffff00011e3052e0 x0 : 0000000000000001 Call trace: fq_pie_qdisc_dequeue+0x10c/0x8ac net/sched/sch_fq_pie.c:246 dequeue_skb net/sched/sch_generic.c:292 [inline] qdisc_restart net/sched/sch_generic.c:397 [inline] __qdisc_run+0x1fc/0x231c net/sched/sch_generic.c:415 __dev_xmit_skb net/core/dev.c:3868 [inline] __dev_queue_xmit+0xc80/0x3318 net/core/dev.c:4210 dev_queue_xmit include/linux/netdevice.h:3085 [inline] neigh_connected_output+0x2f8/0x38c net/core/neighbour.c:1581 neigh_output include/net/neighbour.h:544 [inline] ip6_finish_output2+0xd60/0x1a1c net/ipv6/ip6_output.c:134 __ip6_finish_output net/ipv6/ip6_output.c:195 [inline] ip6_finish_output+0x538/0x8c8 net/ipv6/ip6_output.c:206 NF_HOOK_COND include/linux/netfilter.h:292 [inline] ip6_output+0x270/0x594 net/ipv6/ip6_output.c:227 dst_output include/net/dst.h:458 [inline] NF_HOOK include/linux/netfilter.h:303 [inline] ndisc_send_skb+0xc30/0x1790 net/ipv6/ndisc.c:508 ndisc_send_rs+0x47c/0x5d4 net/ipv6/ndisc.c:718 addrconf_rs_timer+0x300/0x58c net/ipv6/addrconf.c:3936 call_timer_fn+0x19c/0x8cc kernel/time/timer.c:1700 expire_timers kernel/time/timer.c:1751 [inline] __run_timers+0x55c/0x734 kernel/time/timer.c:2022 run_timer_softirq+0x7c/0x114 kernel/time/timer.c:2035 __do_softirq+0x2d0/0xd54 kernel/softirq.c:571 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:80 call_on_irq_stack+0x24/0x4c arch/arm64/kernel/entry.S:882 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:85 invoke_softirq kernel/softirq.c:452 [inline] __irq_exit_rcu+0x28c/0x534 kernel/softirq.c:650 irq_exit_rcu+0x14/0x84 kernel/softirq.c:662 __el1_irq arch/arm64/kernel/entry-common.c:474 [inline] el1_interrupt+0x38/0x68 arch/arm64/kernel/entry-common.c:488 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:493 el1h_64_irq+0x64/0x68 arch/arm64/kernel/entry.S:587 __daif_local_irq_restore arch/arm64/include/asm/irqflags.h:182 [inline] arch_local_irq_restore arch/arm64/include/asm/irqflags.h:202 [inline] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 spin_unlock_irqrestore include/linux/spinlock.h:405 [inline] unlock_page_lruvec_irqrestore include/linux/memcontrol.h:1645 [inline] folio_batch_move_lru+0x3b8/0x4cc mm/swap.c:223 folio_batch_add_and_move+0x144/0x1c8 mm/swap.c:234 folio_add_lru+0x1d4/0x3e8 mm/swap.c:517 shmem_get_folio_gfp+0x13a8/0x22ec mm/shmem.c:1983 shmem_get_folio mm/shmem.c:2079 [inline] shmem_write_begin+0x13c/0x4d8 mm/shmem.c:2573 generic_perform_write+0x278/0x55c mm/filemap.c:3923 __generic_file_write_iter+0x168/0x388 mm/filemap.c:4051 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4083 call_write_iter include/linux/fs.h:1868 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x618/0x918 fs/read_write.c:584 ksys_write+0x15c/0x26c fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x244 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:191 el0_svc+0x4c/0x160 arch/arm64/kernel/entry-common.c:647 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591