------------[ cut here ]------------ WARNING: CPU: 0 PID: 6539 at kernel/rcu/sync.c:177 rcu_sync_dtor+0xd4/0x174 kernel/rcu/sync.c:190 Modules linked in: CPU: 0 UID: 0 PID: 6539 Comm: kworker/0:5 Not tainted 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events destroy_super_work pstate: 60400005 (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 : ffff8000a00679f0 x29: ffff8000a0067a00 x28: ffff80008f2fe648 x27: 1fffe0001b0437a2 x26: 0000000000000000 x25: ffff0000d1a2fa18 x24: dfff800000000000 x23: 00000000000001b4 x22: dfff800000000000 x21: 1fffe0001eee306a x20: dfff800000000000 x19: ffff0000f7718350 x18: 000000008ad35b4d x17: dfff800000000000 x16: ffff80008ada5d6c x15: 0000000000000001 x14: 1ffff00011e717ed x13: 0000000000000000 x12: 0000000000000000 x11: ffff700011e717ee x10: 0000000000000003 x9 : 0000000000000003 x8 : 0000000000000002 x7 : 0000000000000000 x6 : 000000000000003f x5 : 0000000000000040 x4 : 0000000000000001 x3 : ffff800080d19e30 x2 : 0000000000000001 x1 : ffff80008b3d7940 x0 : ffff0000f7718350 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:282 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 irq event stamp: 71924 hardirqs last enabled at (71923): [] kasan_quarantine_put+0x1a0/0x1c8 mm/kasan/quarantine.c:234 hardirqs last disabled at (71924): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:488 softirqs last enabled at (71642): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (71642): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (69975): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6539 at kernel/rcu/sync.c:180 rcu_sync_dtor+0xdc/0x174 kernel/rcu/sync.c:190 Modules linked in: CPU: 0 UID: 0 PID: 6539 Comm: kworker/0:5 Tainted: G W 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events destroy_super_work pstate: 604000c5 (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 : ffff8000a00679f0 x29: ffff8000a0067a00 x28: ffff80008f2fe648 x27: 1fffe0001b0437a2 x26: 0000000000000000 x25: ffff0000d1a2fa18 x24: dfff800000000000 x23: 00000000000001b4 x22: dfff800000000000 x21: 1fffe0001eee306a x20: dfff800000000000 x19: ffff0000f7718350 x18: 000000008ad35b4d x17: dfff800000000000 x16: ffff80008051fa78 x15: ffff70001400cf24 x14: 1ffff0001400cf24 x13: 0000000000000004 x12: ffffffffffffffff x11: ffff70001400cf24 x10: dfff800000000000 x9 : 0000000000000000 x8 : 0000000000000001 x7 : ffff800080595c74 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008051fb90 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:282 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 irq event stamp: 71958 hardirqs last enabled at (71957): [] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (71957): [] exit_to_kernel_mode+0xc0/0xf0 arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (71958): [] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] hardirqs last disabled at (71958): [] _raw_spin_lock_irq+0x28/0x70 kernel/locking/spinlock.c:170 softirqs last enabled at (71952): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (71952): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (71929): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]--- ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6539 at kernel/rcu/sync.c:188 rcu_sync_dtor+0x104/0x174 kernel/rcu/sync.c:-1 Modules linked in: CPU: 0 UID: 0 PID: 6539 Comm: kworker/0:5 Tainted: G W 6.15.0-rc4-syzkaller-ge0f4c8dd9d2d #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Workqueue: events destroy_super_work pstate: 60400005 (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 : ffff8000a00679f0 x29: ffff8000a0067a00 x28: ffff80008f2fe648 x27: 1fffe0001b0437a2 x26: 0000000000000000 x25: ffff0000d1a2fa18 x24: dfff800000000000 x23: 00000000000001b4 x22: 0000000000000002 x21: 1fffe0001eee306a x20: dfff800000000000 x19: ffff0000f7718350 x18: 1fffe0003670d276 x17: ffff80008f2fe000 x16: ffff80008ada5e7c x15: 0000000000000001 x14: 1ffff0001400cf14 x13: 0000000000000000 x12: 0000000000000000 x11: ffff70001400cf15 x10: dfff800000000000 x9 : 5effca7034df8100 x8 : 0000000000000002 x7 : ffff80008adb503c x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008adb5350 x2 : 0000000000000001 x1 : 0000000000000008 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:282 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238 process_scheduled_works kernel/workqueue.c:3319 [inline] worker_thread+0x958/0xed8 kernel/workqueue.c:3400 kthread+0x5fc/0x75c kernel/kthread.c:464 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:862 irq event stamp: 72404 hardirqs last enabled at (72403): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] hardirqs last enabled at (72403): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:202 hardirqs last disabled at (72404): [] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:488 softirqs last enabled at (72396): [] softirq_handle_end kernel/softirq.c:425 [inline] softirqs last enabled at (72396): [] handle_softirqs+0xaf8/0xc88 kernel/softirq.c:607 softirqs last disabled at (72241): [] __do_softirq+0x14/0x20 kernel/softirq.c:613 ---[ end trace 0000000000000000 ]---