watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [aoe_tx0:2412] Modules linked in: irq event stamp: 69366957 hardirqs last enabled at (69366956): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (69366956): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (69366957): [] __el1_irq arch/arm64/kernel/entry-common.c:650 [inline] hardirqs last disabled at (69366957): [] el1_interrupt+0x24/0x54 arch/arm64/kernel/entry-common.c:668 softirqs last enabled at (1236): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1240): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 UID: 0 PID: 2412 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 : ffff8000a19f76d0 x29: ffff8000a19f76d0 x28: ffff0000f4c6e6b0 x27: 0000000000000000 x26: ffff0000f4c6e640 x25: ffff0000f4c6e718 x24: dfff800000000000 x23: 0000000000000003 x22: 0000000000000000 x21: ffff8000913a3f00 x20: ffff8000978b4dc0 x19: 0000000000000000 x18: 00000000ffffffff x17: ffff800093524000 x16: ffff800080529624 x15: 0000000000000001 x14: 1ffff00012f169b8 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093323be8 x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800083e16f80 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000002 x1 : ffff80008eddb42c x0 : ffff80010c5b9000 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: 6515 Comm: sshd-session Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : lock_acquire+0x178/0x2e0 arch/arm64/include/asm/irqflags.h:-1 lr : lockdep_recursion_finish kernel/locking/lockdep.c:470 [inline] lr : lock_acquire+0x158/0x2e0 kernel/locking/lockdep.c:5870 sp : ffff8000a34a7130 x29: ffff8000a34a7180 x28: 0000000000000000 x27: 0000000000000000 x26: ffff80008f726570 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000002 x22: ffff80008f9c9460 x21: ffff800080c6e054 x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008b0142f8 x15: 0000000000000001 x14: 1ffff00012f02814 x13: 0000000000000000 x12: 0000000000000000 x11: 000000002454a64e x10: 0000000000000003 x9 : 0000000000000000 x8 : 00000000000000c0 x7 : ffff800080c6e054 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : ffff80008f0be311 x0 : 0000000000000000 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) lock_acquire+0x178/0x2e0 kernel/locking/lockdep.c:5871 (P) rcu_lock_acquire+0x3c/0x48 include/linux/rcupdate.h:331 rcu_read_lock_sched include/linux/rcupdate.h:932 [inline] pfn_valid include/linux/mmzone.h:2162 [inline] lowmem_page_address include/linux/mm.h:2227 [inline] folio_address include/linux/mm.h:2238 [inline] slab_address+0xa4/0x230 mm/slab.h:172 nearest_obj mm/slab.h:307 [inline] kasan_record_aux_stack+0x44/0xc8 mm/kasan/generic.c:542 __call_rcu_common kernel/rcu/tree.c:3123 [inline] call_rcu+0x100/0x978 kernel/rcu/tree.c:3243 security_inode_free+0x9c/0x1b0 security/security.c:1735 __destroy_inode+0x2e8/0x7d0 fs/inode.c:371 destroy_inode fs/inode.c:394 [inline] evict+0x6bc/0x928 fs/inode.c:834 iput_final fs/inode.c:1897 [inline] iput+0x6e4/0x83c fs/inode.c:1923 dentry_unlink_inode+0x384/0x45c fs/dcache.c:466 __dentry_kill+0x170/0x594 fs/dcache.c:669 dput+0x1b8/0x290 fs/dcache.c:911 proc_invalidate_siblings_dcache+0x3a4/0x65c fs/proc/inode.c:143 proc_flush_pid+0x24/0x34 fs/proc/base.c:3483 release_task+0x102c/0x149c kernel/exit.c:293 wait_task_zombie kernel/exit.c:1264 [inline] wait_consider_task+0x1444/0x25ac kernel/exit.c:1491 do_wait_thread kernel/exit.c:1554 [inline] __do_wait+0x144/0x668 kernel/exit.c:1672 do_wait+0x1ec/0x540 kernel/exit.c:1706 kernel_wait4+0x184/0x2e0 kernel/exit.c:1865 __do_sys_wait4 kernel/exit.c:1893 [inline] __se_sys_wait4 kernel/exit.c:1889 [inline] __arm64_sys_wait4+0x11c/0x2a0 kernel/exit.c:1889 __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+0x58/0x180 arch/arm64/kernel/entry-common.c:879 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:898 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596