watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [aoe_tx0:2414] Modules linked in: irq event stamp: 69437839 hardirqs last enabled at (69437838): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (69437838): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (69437839): [] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline] hardirqs last disabled at (69437839): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668 softirqs last enabled at (1356): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1360): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 UID: 0 PID: 2414 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 : uart_write_room+0x30/0x15c drivers/tty/serial/serial_core.c:642 lr : tty_write_room+0x6c/0x8c drivers/tty/tty_ioctl.c:69 sp : ffff8000a2467710 x29: ffff8000a2467730 x28: ffff0000f448ba70 x27: 0000000000000000 x26: ffff0000f448ba00 x25: ffff0000da318238 x24: ffff0000da318da8 x23: ffff0000da318db0 x22: 0000000000000020 x21: dfff800000000000 x20: dfff800000000000 x19: ffff0000c9f71000 x18: 00000000ffffffff x17: ffff800093524000 x16: ffff800080529624 x15: 0000000000000001 x14: 1fffe0001935e1f0 x13: 0000000000000000 x12: 0000000000000000 x11: ffff60001935e1f1 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : a8c0b9cd3d16b000 x7 : ffff800083e16f80 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800083e17330 x2 : 0000000000000001 x1 : 0000000000000020 x0 : ffff0000c9f71000 Call trace: uart_write_room+0x30/0x15c drivers/tty/serial/serial_core.c:642 (P) tty_write_room+0x6c/0x8c drivers/tty/tty_ioctl.c:69 handle_tx+0x128/0x5fc drivers/net/caif/caif_serial.c:212 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: 8656 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 : __sanitizer_cov_trace_pc+0x80/0x84 kernel/kcov.c:235 lr : contpte_try_unfold arch/arm64/include/asm/pgtable.h:1715 [inline] lr : get_and_clear_full_ptes arch/arm64/include/asm/pgtable.h:1825 [inline] lr : zap_present_folio_ptes mm/memory.c:1499 [inline] lr : zap_present_ptes mm/memory.c:1581 [inline] lr : do_zap_pte_range mm/memory.c:1682 [inline] lr : zap_pte_range mm/memory.c:1726 [inline] lr : zap_pmd_range mm/memory.c:1818 [inline] lr : zap_pud_range mm/memory.c:1847 [inline] lr : zap_p4d_range mm/memory.c:1868 [inline] lr : unmap_page_range+0xff4/0x3168 mm/memory.c:1889 sp : ffff80009fab7220 x29: ffff80009fab7440 x28: ffff000114072210 x27: 0000000000000001 x26: ffff0000c60b8000 x25: fffffdffc44f2d18 x24: 0000ffffa0442000 x23: 0010000000000001 x22: 0068000153cb4fc3 x21: 1fffffbff889e5a3 x20: ffff80009fab7680 x19: dfff800000000000 x18: 1fffe00033797688 x17: ffff0001fea8c8b0 x16: ffff80008b0142f8 x15: 0000000000000001 x14: 1fffffbff889e59e x13: 0000000000000000 x12: 0000000000000000 x11: ffff7fbff889e59f x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000c5209e80 x7 : ffff800080d16e10 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0068000153cb4fc3 x1 : 0000000000000001 x0 : 0010000000000001 Call trace: __sanitizer_cov_trace_pc+0x80/0x84 kernel/kcov.c:235 (P) 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 do_signal+0x274/0x4434 arch/arm64/kernel/signal.c:1618 do_notify_resume+0xb0/0x1f4 arch/arm64/kernel/entry-common.c:152 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:173 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:182 [inline] el0_svc+0xb8/0x180 arch/arm64/kernel/entry-common.c:880 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596