watchdog: BUG: soft lockup - CPU#0 stuck for 26s! [syz-executor.2:32230] Modules linked in: irq event stamp: 54848489 hardirqs last enabled at (54848488): [] __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:386 hardirqs last disabled at (54848489): [] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (54848489): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (3050): [] pneigh_ifdown_and_unlock net/core/neighbour.c:865 [inline] softirqs last enabled at (3050): [] __neigh_ifdown+0x198/0x390 net/core/neighbour.c:447 softirqs last disabled at (3088): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (3088): [] batadv_tt_local_resize_to_mtu+0x60/0x154 net/batman-adv/translation-table.c:3949 CPU: 0 PID: 32230 Comm: syz-executor.2 Not tainted 6.8.0-rc6-syzkaller-g9910665503b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : should_resched arch/arm64/include/asm/preempt.h:79 [inline] pc : __local_bh_enable_ip+0x228/0x44c kernel/softirq.c:388 lr : __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:386 sp : ffff80009a3073d0 x29: ffff80009a3073e0 x28: dfff800000000000 x27: dfff800000000000 x26: ffff00011f230190 x25: ffff0000d1570d88 x24: 0000000000000001 x23: 1fffe00019edab41 x22: dfff800000000000 x21: ffff80008aad8014 x20: 0000000000000202 x19: ffff0000cf6d5a08 x18: ffff80009a306b20 x17: 77656e2074696620 x16: ffff800080320090 x15: 0000000000000001 x14: 1fffe00023e4e190 x13: 0000000000000000 x12: 0000000000000003 x11: 0000000000040000 x10: 0000000000000003 x9 : 0000000000000000 x8 : 000000000344ebe8 x7 : ffff80008aad7eac x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000002 x1 : ffff80008aedda60 x0 : ffff800125414000 Call trace: __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:27 [inline] arch_local_irq_enable arch/arm64/include/asm/irqflags.h:49 [inline] __local_bh_enable_ip+0x228/0x44c kernel/softirq.c:386 __raw_spin_unlock_bh include/linux/spinlock_api_smp.h:167 [inline] _raw_spin_unlock_bh+0x3c/0x4c kernel/locking/spinlock.c:210 spin_unlock_bh include/linux/spinlock.h:396 [inline] batadv_tt_local_purge+0x264/0x2e8 net/batman-adv/translation-table.c:1356 batadv_tt_local_resize_to_mtu+0xa0/0x154 net/batman-adv/translation-table.c:3956 batadv_hard_if_event+0x41c/0xe04 notifier_call_chain+0x1a4/0x510 kernel/notifier.c:93 raw_notifier_call_chain+0x3c/0x50 kernel/notifier.c:461 call_netdevice_notifiers_info net/core/dev.c:1966 [inline] call_netdevice_notifiers_mtu+0x170/0x20c net/core/dev.c:2041 dev_set_mtu_ext+0x3c8/0x544 net/core/dev.c:8791 dev_set_mtu+0xb0/0x194 net/core/dev.c:8812 dev_ifsioc+0x1d0/0x9a8 net/core/dev_ioctl.c:537 dev_ioctl+0x4d8/0xd34 net/core/dev_ioctl.c:787 sock_do_ioctl+0x1d4/0x2d0 net/socket.c:1236 sock_ioctl+0x4ec/0x838 net/socket.c:1341 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl fs/ioctl.c:857 [inline] __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.8.0-rc6-syzkaller-g9910665503b3 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:51 lr : default_idle_call+0xf8/0x128 kernel/sched/idle.c:103 sp : ffff800093a17d30 x29: ffff800093a17d30 x28: dfff800000000000 x27: 1ffff00012742fb4 x26: ffff80008ec9d000 x25: 0000000000000000 x24: 0000000000000002 x23: 1ffff00011d93a74 x22: ffff80008ec9d3a0 x21: 0000000000000000 x20: ffff0000c1aabc00 x19: ffff8000802cfefc x18: 1fffe00036804396 x17: ffff80008ec9d000 x16: ffff8000802cf7c0 x15: 0000000000000001 x14: 1fffe00036805f10 x13: 0000000000000000 x12: 0000000000000003 x11: 0000000000000001 x10: 0000000000000003 x9 : 0000000000000000 x8 : 0000000000541bbf x7 : ffff80008045f908 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008ad679c0 x2 : 0000000000000000 x1 : ffff80008aedda60 x0 : ffff800125436000 Call trace: __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:27 [inline] arch_local_irq_enable+0x8/0xc arch/arm64/include/asm/irqflags.h:49 cpuidle_idle_call kernel/sched/idle.c:170 [inline] do_idle+0x1f0/0x4e8 kernel/sched/idle.c:312 cpu_startup_entry+0x5c/0x74 kernel/sched/idle.c:410 secondary_start_kernel+0x198/0x1c0 arch/arm64/kernel/smp.c:272 __secondary_switched+0xb8/0xbc arch/arm64/kernel/head.S:404