watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [aoe_tx0:2428] Modules linked in: irq event stamp: 66134681 hardirqs last enabled at (66134680): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (66134680): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (66134681): [] __enter_from_kernel_mode arch/arm64/kernel/entry-common.c:43 [inline] hardirqs last disabled at (66134681): [] enter_from_kernel_mode+0x14/0x34 arch/arm64/kernel/entry-common.c:50 softirqs last enabled at (2556): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (2560): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 UID: 0 PID: 2428 Comm: aoe_tx0 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 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 : ffff8000a2f576f0 x29: ffff8000a2f576f0 x28: ffff0000d63a16b0 x27: 0000000000000000 x26: ffff0000d63a1640 x25: ffff0000d63a1718 x24: dfff800000000000 x23: 0000000000000003 x22: 0000000000000000 x21: ffff80009147efc0 x20: ffff80009799ae20 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff800093605000 x16: ffff80008052bc24 x15: 0000000000000001 x14: 1ffff00012f335c4 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093404c28 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800083e3d860 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008ee54d8e x0 : ffff80010c40c000 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:629 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:5222 [inline] netdev_start_xmit include/linux/netdevice.h:5231 [inline] xmit_one net/core/dev.c:3839 [inline] dev_hard_start_xmit+0x2b0/0x890 net/core/dev.c:3855 __dev_queue_xmit+0x1600/0x32a8 net/core/dev.c:4725 dev_queue_xmit include/linux/netdevice.h:3361 [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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 7364 Comm: syz-executor Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __pte_to_phys arch/arm64/include/asm/pgtable.h:153 [inline] pc : vm_normal_page+0x40/0x204 mm/memory.c:601 lr : lpa2_is_enabled arch/arm64/include/asm/pgtable-prot.h:87 [inline] lr : __pte_to_phys arch/arm64/include/asm/pgtable.h:153 [inline] lr : vm_normal_page+0x40/0x204 mm/memory.c:601 sp : ffff80009f3c7200 x29: ffff80009f3c7200 x28: ffff00010210ac90 x27: fffffdffc3e9ac40 x26: 000000000000006e x25: dfff800000000000 x24: 0000ffff86192000 x23: ffff0000d36adb80 x22: 0000000000000000 x21: 006800013a6b2fc3 x20: ffff0000f8e64500 x19: 0000ffff86192000 x18: 0000000000000000 x17: ffff0001fea8d8b0 x16: ffff80008b065ce0 x15: 0000000000000001 x14: 1fffffbff87d358e x13: 0000000000000000 x12: 0000000000000000 x11: ffff7fbff87d358f x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000d36adb80 x7 : ffff800080d0d438 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 006800013a6b2fc3 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: lpa2_is_enabled arch/arm64/include/asm/pgtable-prot.h:87 [inline] (P) __pte_to_phys arch/arm64/include/asm/pgtable.h:153 [inline] (P) vm_normal_page+0x40/0x204 mm/memory.c:601 (P) zap_present_ptes mm/memory.c:1551 [inline] do_zap_pte_range mm/memory.c:1682 [inline] zap_pte_range mm/memory.c:1726 [inline] zap_pmd_range mm/memory.c:1818 [inline] zap_pud_range mm/memory.c:1847 [inline] zap_p4d_range mm/memory.c:1868 [inline] unmap_page_range+0xac4/0x3168 mm/memory.c:1889 unmap_single_vma mm/memory.c:1932 [inline] unmap_vmas+0x264/0x3d4 mm/memory.c:1976 exit_mmap+0x1bc/0xabc mm/mmap.c:1280 __mmput+0xec/0x3fc kernel/fork.c:1129 mmput+0x70/0xac kernel/fork.c:1152 exit_mm+0x13c/0x200 kernel/exit.c:582 do_exit+0x4bc/0x1a14 kernel/exit.c:949 do_group_exit+0x194/0x22c kernel/exit.c:1102 get_signal+0x11dc/0x12f8 kernel/signal.c:3034 arch_do_signal_or_restart+0x274/0x4434 arch/arm64/kernel/signal.c:1619 exit_to_user_mode_loop+0x7c/0x168 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:103 [inline] el0_svc+0x170/0x254 arch/arm64/kernel/entry-common.c:745 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596