------------[ cut here ]------------ WARNING: CPU: 0 PID: 6606 at kernel/rcu/sync.c:177 rcu_sync_dtor+0xd4/0x174 kernel/rcu/sync.c:190 Modules linked in: CPU: 0 UID: 0 PID: 6606 Comm: kworker/0:4 Not tainted 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: events destroy_super_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : rcu_sync_dtor+0xd4/0x174 kernel/rcu/sync.c:190 lr : percpu_free_rwsem+0x48/0x88 kernel/locking/percpu-rwsem.c:42 sp : ffff8000a1af79f0 x29: ffff8000a1af7a00 x28: 1ffff00011ef829b x27: dfff800000000000 x26: ffff0000d14b5718 x25: ffff0000c1080000 x24: dfff800000000000 x23: 00000000000001f6 x22: dfff800000000000 x21: 1fffe00018b89c6b x20: dfff800000000000 x19: ffff0000c5c4e358 x18: 0000000000000000 x17: 0000000000000000 x16: ffff80008b007230 x15: 0000000000000001 x14: 1ffff00011f09925 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700011f09926 x10: 0000000000000003 x9 : 0000000000000003 x8 : 0000000000000002 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000001 x3 : ffff800080d7cb14 x2 : 0000000000000001 x1 : ffff80008b6577c0 x0 : ffff0000c5c4e358 Call trace: rcu_sync_dtor+0xd4/0x174 kernel/rcu/sync.c:190 (P) percpu_free_rwsem+0x48/0x88 kernel/locking/percpu-rwsem.c:42 destroy_super_work+0xec/0x154 fs/super.c:283 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 29880 hardirqs last enabled at (29879): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234 hardirqs last disabled at (29880): [] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574 softirqs last enabled at (29864): [] local_bh_enable+0xc/0x2c include/linux/bottom_half.h:32 softirqs last disabled at (29860): [] local_bh_disable+0xc/0x2c include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6606 at kernel/rcu/sync.c:180 rcu_sync_dtor+0xdc/0x174 kernel/rcu/sync.c:190 Modules linked in: CPU: 0 UID: 0 PID: 6606 Comm: kworker/0:4 Tainted: G W 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: events destroy_super_work pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : rcu_sync_dtor+0xdc/0x174 kernel/rcu/sync.c:190 lr : spin_lock_irq include/linux/spinlock.h:376 [inline] lr : rcu_sync_dtor+0x54/0x174 kernel/rcu/sync.c:179 sp : ffff8000a1af79f0 x29: ffff8000a1af7a00 x28: 1ffff00011ef829b x27: dfff800000000000 x26: ffff0000d14b5718 x25: ffff0000c1080000 x24: dfff800000000000 x23: 00000000000001f6 x22: dfff800000000000 x21: 1fffe00018b89c6b x20: dfff800000000000 x19: ffff0000c5c4e358 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000805354d8 x15: ffff70001435ef24 x14: 1ffff0001435ef24 x13: 0000000000000004 x12: ffffffffffffffff x11: ffff70001435ef24 x10: dfff800000000000 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff8000805adcf8 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff8000805355f0 x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000001 Call trace: rcu_sync_dtor+0xdc/0x174 kernel/rcu/sync.c:190 (P) percpu_free_rwsem+0x48/0x88 kernel/locking/percpu-rwsem.c:42 destroy_super_work+0xec/0x154 fs/super.c:283 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 29946 hardirqs last enabled at (29945): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:86 [inline] hardirqs last enabled at (29945): [] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:96 hardirqs last disabled at (29946): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (29946): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170 softirqs last enabled at (29940): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (29940): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (29883): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6606 at kernel/rcu/sync.c:188 rcu_sync_dtor+0x104/0x174 kernel/rcu/sync.c:-1 Modules linked in: CPU: 0 UID: 0 PID: 6606 Comm: kworker/0:4 Tainted: G W 6.17.0-rc1-syzkaller-g8f5ae30d69d7 #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 Workqueue: events destroy_super_work pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : rcu_sync_dtor+0x104/0x174 kernel/rcu/sync.c:-1 lr : rcu_sync_dtor+0xac/0x174 kernel/rcu/sync.c:187 sp : ffff8000a1af79f0 x29: ffff8000a1af7a00 x28: 1ffff00011ef829b x27: dfff800000000000 x26: ffff0000d14b5718 x25: ffff0000c1080000 x24: dfff800000000000 x23: 00000000000001f6 x22: 0000000000000002 x21: 1fffe00018b89c6b x20: dfff800000000000 x19: ffff0000c5c4e358 x18: 1fffe0003379be88 x17: ffff80008f7be000 x16: ffff80008b007230 x15: 0000000000000001 x14: 1fffe0003379e908 x13: 0000000000000000 x12: 0000000000000000 x11: ffff800093306be8 x10: 0000000000000003 x9 : 800f39f582fe6d00 x8 : 0000000000000002 x7 : ffff800080491074 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010 x2 : 0000000000000006 x1 : ffff80008b6577c0 x0 : 0000000000000001 Call trace: rcu_sync_dtor+0x104/0x174 kernel/rcu/sync.c:-1 (P) percpu_free_rwsem+0x48/0x88 kernel/locking/percpu-rwsem.c:42 destroy_super_work+0xec/0x154 fs/super.c:283 process_one_work+0x7e8/0x155c kernel/workqueue.c:3236 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:463 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844 irq event stamp: 30108 hardirqs last enabled at (30107): [] raw_spin_rq_unlock_irq kernel/sched/sched.h:1531 [inline] hardirqs last enabled at (30107): [] finish_lock_switch+0xb0/0x1c0 kernel/sched/core.c:5105 hardirqs last disabled at (30108): [] el1_brk64+0x1c/0x48 arch/arm64/kernel/entry-common.c:574 softirqs last enabled at (30078): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (30078): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (29949): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]---