syzbot

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WARNING: CPU: 1 PID: 979 at kernel/rcu/sync.c:177 rcu_sync_dtor+0xcd/0x180 kernel/rcu/sync.c:177
Modules linked in:
CPU: 1 UID: 0 PID: 979 Comm: kworker/1:3 Not tainted 6.15.0-rc7-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: events destroy_super_work
RIP: 0010:rcu_sync_dtor+0xcd/0x180 kernel/rcu/sync.c:177
Code: 18 e8 27 c3 00 00 43 0f b6 44 25 00 84 c0 0f 85 82 00 00 00 83 3b 00 75 1f 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 90 <0f> 0b 90 e9 66 ff ff ff 90 0f 0b 90 eb 8a 90 0f 0b 90 eb db 89 d9
RSP: 0018:ffffc90003877a88 EFLAGS: 00010246
RAX: 0000000000000002 RBX: ffff888028b78350 RCX: 5e7229965b1b4600
RDX: 0000000000000000 RSI: ffffffff8bc11fa0 RDI: ffff888028b78350
RBP: 00000000000001a1 R08: ffffffff8dde132f R09: 1ffffffff1bbc265
R10: dffffc0000000000 R11: fffffbfff1bbc266 R12: dffffc0000000000
R13: 1ffff1100516f06a R14: ffff888028b78350 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881261f6000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff371cadc8 CR3: 0000000072056000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 percpu_free_rwsem+0x40/0x80 kernel/locking/percpu-rwsem.c:42
 destroy_super_work+0xee/0x130 fs/super.c:282
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xade/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x711/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>