watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz.4.1491:10102] Modules linked in: irq event stamp: 33885853 hardirqs last enabled at (33885852): [] seqcount_lockdep_reader_access+0x7c/0xf8 include/linux/seqlock.h:75 hardirqs last disabled at (33885853): [] __el1_irq arch/arm64/kernel/entry-common.c:506 [inline] hardirqs last disabled at (33885853): [] el1_interrupt+0x28/0x60 arch/arm64/kernel/entry-common.c:522 softirqs last enabled at (49606): [] __alloc_skb+0x1c0/0x610 net/core/skbuff.c:698 softirqs last disabled at (49607): [] __do_softirq+0x14/0x20 kernel/softirq.c:656 CPU: 0 UID: 0 PID: 10102 Comm: syz.4.1491 Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 43400005 (nZcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : seqcount_lockdep_reader_access+0xd8/0xf8 include/linux/seqlock.h:76 lr : seqcount_lockdep_reader_access+0xd4/0xf8 include/linux/seqlock.h:75 sp : ffff80008eb27ce0 x29: ffff80008eb27ce0 x28: 1fffe00035bc5c3a x27: ffff80008e80e110 x26: dfff800000000000 x25: ffff0000cdab8f80 x24: 1fffe0001bac7226 x23: dfff800000000000 x22: ffff0000cdab8fb0 x21: 0000000000000000 x20: ffff800080559c88 x19: 00000000000000c0 x18: 00000000ffffffff x17: ffff80008a791000 x16: 0000000000000005 x15: ffff80008a31ada0 x14: 000000008030f608 x13: 0000000000000001 x12: ffff0000c7011d40 x11: ffff80008a590e28 x10: 0000000000000003 x9 : 0000000000000102 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff800080559874 x2 : 0000000000000080 x1 : ffff0000c7011d40 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) seqcount_lockdep_reader_access+0xd8/0xf8 include/linux/seqlock.h:75 (P) ktime_get+0x68/0x218 kernel/time/timekeeping.c:971 gate_get_time+0x1c/0xa4 net/sched/act_gate.c:23 gate_timer_func+0x1a8/0x390 net/sched/act_gate.c:101 __run_hrtimer kernel/time/hrtimer.c:2032 [inline] __hrtimer_run_queues+0x314/0xbe0 kernel/time/hrtimer.c:2096 hrtimer_run_softirq+0x15c/0x21c kernel/time/hrtimer.c:2113 handle_softirqs+0x2ec/0xd98 kernel/softirq.c:622 __do_softirq+0x14/0x20 kernel/softirq.c:656 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:889 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83 do_softirq+0x90/0xf8 kernel/softirq.c:523 __local_bh_enable_ip+0x240/0x35c kernel/softirq.c:450 local_bh_enable include/linux/bottom_half.h:33 [inline] __alloc_skb+0x1c8/0x610 net/core/skbuff.c:699 alloc_skb include/linux/skbuff.h:1384 [inline] alloc_skb_with_frags+0xb8/0x690 net/core/skbuff.c:6769 sock_alloc_send_pskb+0x740/0x850 net/core/sock.c:3013 unix_dgram_sendmsg+0x434/0x1078 net/unix/af_unix.c:2136 sock_sendmsg_nosec net/socket.c:775 [inline] __sock_sendmsg+0xc8/0x17c net/socket.c:790 ____sys_sendmsg+0x3f8/0x6c8 net/socket.c:2684 ___sys_sendmsg+0x198/0x224 net/socket.c:2738 __sys_sendmmsg+0x204/0x580 net/socket.c:2827 __do_sys_sendmmsg net/socket.c:2854 [inline] __se_sys_sendmmsg net/socket.c:2851 [inline] __arm64_sys_sendmmsg+0xac/0xc8 net/socket.c:2851 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 4696 Comm: syz-executor Tainted: G L syzkaller #0 PREEMPT Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:-1 [inline] pc : arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] pc : handle_softirqs+0x1cc/0xd98 kernel/softirq.c:606 lr : handle_softirqs+0x1c8/0xd98 kernel/softirq.c:606 sp : ffff80008eb37ef0 x29: ffff80008eb37f80 x28: ffff0000d2fa3a88 x27: ffff0000d2fa3a90 x26: dfff800000000000 x25: 0000000000000008 x24: dfff800000000000 x23: ffff0001ade63640 x22: ffff0000d2fa3a80 x21: 000000000000000a x20: ffff800088ac5640 x19: ffff0001ade63640 x18: 1fffe00035bc9e28 x17: ffff80012539e000 x16: ffff80008eb30000 x15: 0000000000000000 x14: 00000000ffff8000 x13: 0000000000000001 x12: 0000000000000000 x11: ffff800080157100 x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000000164b8c x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000008 x3 : ffff8000801571a8 x2 : 0000000000000000 x1 : ffff0000d2fa3a80 x0 : ffff80012539e000 Call trace: __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P) arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] (P) handle_softirqs+0x1cc/0xd98 kernel/softirq.c:606 (P) __do_softirq+0x14/0x20 kernel/softirq.c:656 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:889 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83 invoke_softirq kernel/softirq.c:503 [inline] __irq_exit_rcu+0x1ac/0x428 kernel/softirq.c:735 irq_exit_rcu+0x14/0x84 kernel/softirq.c:752 __el1_irq arch/arm64/kernel/entry-common.c:510 [inline] el1_interrupt+0x40/0x60 arch/arm64/kernel/entry-common.c:522 el1h_64_irq_handler+0x18/0x24 arch/arm64/kernel/entry-common.c:527 el1h_64_irq+0x6c/0x70 arch/arm64/kernel/entry.S:590 __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] (P) arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] (P) __raw_write_unlock_irq include/linux/rwlock_api_smp.h:301 [inline] (P) _raw_write_unlock_irq+0x34/0x80 kernel/locking/spinlock.c:362 (P) exit_notify kernel/exit.c:806 [inline] do_exit+0x1044/0x1a74 kernel/exit.c:1021 do_group_exit+0x198/0x238 kernel/exit.c:1152 __do_sys_exit_group kernel/exit.c:1163 [inline] __se_sys_exit_group kernel/exit.c:1161 [inline] pid_child_should_wake+0x0/0x104 kernel/exit.c:1161 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:736 el0t_64_sync_handler+0x48/0x148 arch/arm64/kernel/entry-common.c:755 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:594