watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [aoe_tx0:2453] Modules linked in: irq event stamp: 68485249 hardirqs last enabled at (68485248): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (68485248): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (68485249): [] enter_from_kernel_mode+0x14/0x34 arch/arm64/kernel/entry-common.c:42 softirqs last enabled at (1170): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1174): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 0 UID: 0 PID: 2453 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline] pc : _raw_spin_unlock_irqrestore+0x44/0x98 kernel/locking/spinlock.c:194 lr : __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] lr : _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 sp : ffff8000a2aa76f0 x29: ffff8000a2aa76f0 x28: ffff0000c5f0c7f0 x27: 0000000000000000 x26: ffff0000c5f0c780 x25: ffff0000c5f0c858 x24: dfff800000000000 x23: 0000000000000003 x22: 0000000000000000 x21: ffff8000911b18c0 x20: ffff8000976d7f60 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff800093325000 x16: ffff80008052bd88 x15: 0000000000000001 x14: 1ffff00012edafec x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093124c88 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800083b31bc4 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008eb9b3b1 x0 : ffff80010c9ca000 Call trace: __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) spin_unlock_irqrestore include/linux/spinlock.h:406 [inline] uart_port_unlock_irqrestore include/linux/serial_core.h:788 [inline] uart_port_unlock_deref+0x108/0x2ec drivers/tty/serial/serial_core.c:91 uart_write+0xc4/0x130 drivers/tty/serial/serial_core.c:626 handle_tx+0x200/0x5fc drivers/net/caif/caif_serial.c:222 caif_xmit+0x108/0x150 drivers/net/caif/caif_serial.c:268 __netdev_start_xmit include/linux/netdevice.h:5248 [inline] netdev_start_xmit include/linux/netdevice.h:5257 [inline] xmit_one net/core/dev.c:3845 [inline] dev_hard_start_xmit+0x2b0/0x890 net/core/dev.c:3861 __dev_queue_xmit+0x1600/0x32a8 net/core/dev.c:4763 dev_queue_xmit include/linux/netdevice.h:3365 [inline] tx+0x9c/0x1cc drivers/block/aoe/aoenet.c:62 kthread+0x164/0x354 drivers/block/aoe/aoecmd.c:1241 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 7994 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : bbr_is_next_cycle_phase net/ipv4/tcp_bbr.c:560 [inline] pc : bbr_update_cycle_phase net/ipv4/tcp_bbr.c:606 [inline] pc : bbr_update_model net/ipv4/tcp_bbr.c:1020 [inline] pc : bbr_main+0x5f4/0x3454 net/ipv4/tcp_bbr.c:1032 lr : bbr_update_cycle_phase net/ipv4/tcp_bbr.c:606 [inline] lr : bbr_update_model net/ipv4/tcp_bbr.c:1020 [inline] lr : bbr_main+0x5a8/0x3454 net/ipv4/tcp_bbr.c:1032 sp : ffff800097956be0 x29: ffff800097956c60 x28: dfff800000000000 x27: ffff0000d599aea8 x26: ffff800097956f00 x25: 1fffe0001ab335d5 x24: 0000000000000282 x23: 0000000000000001 x22: ffff0000d599aed2 x21: 00000000053f0e72 x20: ffff0000d599a640 x19: ffff0000d599aea0 x18: 00000000ffffffff x17: 847037887f690a08 x16: ffff80008052b3c8 x15: 0000000000000001 x14: 1fffe0001ab335c8 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001ab335c9 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000003c76e16 x7 : 0000000000000000 x6 : 000000000000003f x5 : ffff800097956f00 x4 : ffff800097956f00 x3 : 0000000000003a5b x2 : 000000000000016e x1 : 0000000000000002 x0 : 0000000000000002 Call trace: bbr_is_next_cycle_phase net/ipv4/tcp_bbr.c:560 [inline] (P) bbr_update_cycle_phase net/ipv4/tcp_bbr.c:606 [inline] (P) bbr_update_model net/ipv4/tcp_bbr.c:1020 [inline] (P) bbr_main+0x5f4/0x3454 net/ipv4/tcp_bbr.c:1032 (P) tcp_cong_control net/ipv4/tcp_input.c:3644 [inline] tcp_ack+0x305c/0x4dd4 net/ipv4/tcp_input.c:4143 tcp_rcv_state_process+0x4c4/0x3784 net/ipv4/tcp_input.c:6989 tcp_v4_do_rcv+0x97c/0x11d0 net/ipv4/tcp_ipv4.c:1954 tcp_v4_rcv+0x1f1c/0x27c8 net/ipv4/tcp_ipv4.c:2374 ip_protocol_deliver_rcu+0x1f8/0x484 net/ipv4/ip_input.c:205 ip_local_deliver_finish+0x2fc/0x644 net/ipv4/ip_input.c:239 NF_HOOK+0x2c4/0x358 include/linux/netfilter.h:318 ip_local_deliver+0x120/0x194 net/ipv4/ip_input.c:260 dst_input include/net/dst.h:474 [inline] ip_sublist_rcv_finish net/ipv4/ip_input.c:584 [inline] ip_list_rcv_finish net/ipv4/ip_input.c:636 [inline] ip_sublist_rcv+0x90c/0xbd4 net/ipv4/ip_input.c:644 ip_list_rcv+0x398/0x3ec net/ipv4/ip_input.c:678 __netif_receive_skb_list_ptype net/core/dev.c:6122 [inline] __netif_receive_skb_list_core+0x4e4/0x67c net/core/dev.c:6169 __netif_receive_skb_list net/core/dev.c:6221 [inline] netif_receive_skb_list_internal+0x74c/0x9f0 net/core/dev.c:6312 gro_normal_list include/net/gro.h:524 [inline] gro_flush_normal include/net/gro.h:532 [inline] napi_complete_done+0x250/0x614 net/core/dev.c:6681 gve_napi_poll_dqo+0x284/0x3b8 drivers/net/ethernet/google/gve/gve_main.c:455 __napi_poll+0xb4/0x310 net/core/dev.c:7594 napi_poll net/core/dev.c:7657 [inline] net_rx_action+0x548/0xd00 net/core/dev.c:7784 handle_softirqs+0x328/0xc88 kernel/softirq.c:622 __do_softirq+0x14/0x20 kernel/softirq.c:656 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:68 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:891 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:73 invoke_softirq kernel/softirq.c:503 [inline] __irq_exit_rcu+0x1b0/0x478 kernel/softirq.c:723 irq_exit_rcu+0x14/0x84 kernel/softirq.c:739 __el1_irq arch/arm64/kernel/entry-common.c:498 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:510 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:515 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:592 __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) lock_acquire+0x178/0x2e0 kernel/locking/lockdep.c:5871 (P) rcu_lock_acquire+0x44/0x54 include/linux/rcupdate.h:331 rcu_read_lock include/linux/rcupdate.h:867 [inline] page_table_check_clear+0x18c/0x570 mm/page_table_check.c:77 __page_table_check_pte_clear+0xa0/0xc0 mm/page_table_check.c:154 page_table_check_pte_clear include/linux/page_table_check.h:51 [inline] __ptep_get_and_clear_anysz arch/arm64/include/asm/pgtable.h:1380 [inline] __ptep_get_and_clear arch/arm64/include/asm/pgtable.h:1400 [inline] __get_and_clear_full_ptes arch/arm64/include/asm/pgtable.h:1421 [inline] get_and_clear_full_ptes arch/arm64/include/asm/pgtable.h:1836 [inline] zap_present_folio_ptes mm/memory.c:1628 [inline] zap_present_ptes mm/memory.c:1710 [inline] do_zap_pte_range mm/memory.c:1811 [inline] zap_pte_range mm/memory.c:1855 [inline] zap_pmd_range mm/memory.c:1947 [inline] zap_pud_range mm/memory.c:1976 [inline] zap_p4d_range mm/memory.c:1997 [inline] unmap_page_range+0x2768/0x3170 mm/memory.c:2018 unmap_single_vma mm/memory.c:2061 [inline] unmap_vmas+0x264/0x3d4 mm/memory.c:2105 exit_mmap+0x1b4/0xab0 mm/mmap.c:1280 __mmput+0xec/0x3fc kernel/fork.c:1133 mmput+0x70/0xac kernel/fork.c:1156 exit_mm+0x13c/0x200 kernel/exit.c:582 do_exit+0x4bc/0x1a14 kernel/exit.c:954 do_group_exit+0x194/0x22c kernel/exit.c:1107 get_signal+0x11dc/0x12f8 kernel/signal.c:3034 arch_do_signal_or_restart+0x274/0x4414 arch/arm64/kernel/signal.c:1619 exit_to_user_mode_loop+0x7c/0x178 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline] arm64_exit_to_user_mode arch/arm64/kernel/entry-common.c:81 [inline] el0_svc+0x170/0x254 arch/arm64/kernel/entry-common.c:725 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596