watchdog: BUG: soft lockup - CPU#1 stuck for 23s! [kworker/u8:3:43] Modules linked in: irq event stamp: 620964 hardirqs last enabled at (620963): [] __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:387 hardirqs last disabled at (620964): [] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (620964): [] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (620962): [] spin_unlock_bh include/linux/spinlock.h:396 [inline] softirqs last enabled at (620962): [] batadv_tt_global_purge net/batman-adv/translation-table.c:2258 [inline] softirqs last enabled at (620962): [] batadv_tt_purge+0x47c/0x92c net/batman-adv/translation-table.c:3520 softirqs last disabled at (620960): [] spin_lock_bh include/linux/spinlock.h:356 [inline] softirqs last disabled at (620960): [] batadv_tt_global_purge net/batman-adv/translation-table.c:2238 [inline] softirqs last disabled at (620960): [] batadv_tt_purge+0x110/0x92c net/batman-adv/translation-table.c:3520 CPU: 1 PID: 43 Comm: kworker/u8:3 Tainted: G W 6.10.0-rc3-syzkaller-gac2193b4b460 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 Workqueue: bat_events batadv_tt_purge 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:389 lr : __local_bh_enable_ip+0x224/0x44c kernel/softirq.c:387 sp : ffff800095677a10 x29: ffff800095677a20 x28: ffff80008f11f200 x27: ffff0001ffa08f78 x26: 1fffe000195c5481 x25: ffff0000c1fe0d78 x24: 0000000000000001 x23: 1fffe00018372791 x22: dfff800000000000 x21: ffff80008add3288 x20: ffff0001b3d89f00 x19: ffff0000c1b93c88 x18: 1fffe000367b18bf x17: ffff800124c8e000 x16: ffff800080338014 x15: 0000000000000001 x14: 1fffe0001d354d78 x13: 0000000000000000 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 00000000000979a3 x7 : ffff80008add2f1c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : 0000000000000080 x0 : ffff800124c8e000 Call trace: __daif_local_irq_enable arch/arm64/include/asm/irqflags.h:26 [inline] arch_local_irq_enable arch/arm64/include/asm/irqflags.h:48 [inline] __local_bh_enable_ip+0x228/0x44c kernel/softirq.c:387 __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_global_purge net/batman-adv/translation-table.c:2258 [inline] batadv_tt_purge+0x47c/0x92c net/batman-adv/translation-table.c:3520 process_one_work+0x79c/0x15b8 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:3393 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 6316 Comm: syz-executor.0 Tainted: G W 6.10.0-rc3-syzkaller-gac2193b4b460 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : csd_lock_wait kernel/smp.c:311 [inline] pc : smp_call_function_many_cond+0x17e0/0x2f30 kernel/smp.c:855 lr : csd_lock_wait kernel/smp.c:311 [inline] lr : smp_call_function_many_cond+0x17f8/0x2f30 kernel/smp.c:855 sp : ffff80009b2578f0 x29: ffff80009b257a20 x28: 1fffe000367ad018 x27: 0000000000000008 x26: ffffffffffffffff x25: dfff800000000000 x24: 1fffe000367ad019 x23: ffff0001b3d90c68 x22: 0000000000000001 x21: 0000000000000011 x20: ffff0001b3d680c0 x19: ffff0001b3d680c8 x18: 1fffe000367aa1de x17: ffff80008f19d000 x16: ffff800080338014 x15: 0000000000000001 x14: 1fffe000367b218d x13: 0000000000000000 x12: 0000000000000000 x11: ffff6000367b218e x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000011 x7 : ffff800080823fec x6 : 0000000000000000 x5 : 0000000000000000 x4 : ffff800080c49930 x3 : ffff8000804a95d0 x2 : 0000000000000000 x1 : 0000000000000004 x0 : 0000000000000001 Call trace: __cmpwait_case_32 arch/arm64/include/asm/cmpxchg.h:231 [inline] __cmpwait arch/arm64/include/asm/cmpxchg.h:257 [inline] csd_lock_wait kernel/smp.c:311 [inline] smp_call_function_many_cond+0x17e0/0x2f30 kernel/smp.c:855 on_each_cpu_cond_mask+0x5c/0xc4 kernel/smp.c:1023 on_each_cpu_cond include/linux/smp.h:105 [inline] invalidate_bh_lrus+0x34/0x40 fs/buffer.c:1542 invalidate_bdev+0x74/0xa4 block/bdev.c:99 ext4_put_super+0x554/0xafc fs/ext4/super.c:1345 generic_shutdown_super+0x128/0x2b8 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1676 ext4_kill_sb+0x68/0xa4 fs/ext4/super.c:7301 deactivate_locked_super+0xc4/0x12c fs/super.c:473 deactivate_super+0xe0/0x100 fs/super.c:506 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1267 __cleanup_mnt+0x20/0x30 fs/namespace.c:1274 task_work_run+0x230/0x2e0 kernel/task_work.c:180 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] do_notify_resume+0x178/0x1f4 arch/arm64/kernel/entry-common.c:151 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:169 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:178 [inline] el0_svc+0xac/0x168 arch/arm64/kernel/entry-common.c:713 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598