RSP: 002b:00007fdac9a8d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fdac8da5fa0 RCX: 00007fdac8b8d169
RDX: 0000000000000f34 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fdac9a8d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fdac8da5fa0 R15: 00007ffe6f9823f8
 </TASK>
=====================================
WARNING: bad unlock balance detected!
6.14.0-syzkaller #0 Not tainted
-------------------------------------
syz.4.3221/16031 is trying to release lock (event_mutex) at:
[<ffffffff8239c8df>] seq_read_iter+0x5ff/0x12b0 fs/seq_file.c:251
but there are no more locks to release!

other info that might help us debug this:
2 locks held by syz.4.3221/16031:
 #0: ffff88805a4ea9b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x267/0x390 fs/file.c:1192
 #1: ffff8880298ff9e0 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182

stack backtrace:
CPU: 0 UID: 0 PID: 16031 Comm: syz.4.3221 Not tainted 6.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_unlock_imbalance_bug kernel/locking/lockdep.c:5289 [inline]
 print_unlock_imbalance_bug+0x1aa/0x1f0 kernel/locking/lockdep.c:5263
 __lock_release kernel/locking/lockdep.c:5528 [inline]
 lock_release+0x525/0x6f0 kernel/locking/lockdep.c:5872
 __mutex_unlock_slowpath+0xa3/0x6a0 kernel/locking/mutex.c:891
 seq_read_iter+0x5ff/0x12b0 fs/seq_file.c:251
 seq_read+0x39f/0x4e0 fs/seq_file.c:162
 vfs_read+0x1df/0xbf0 fs/read_write.c:563
 ksys_read+0x12b/0x250 fs/read_write.c:708
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdac8b8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdac9a8d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fdac8da5fa0 RCX: 00007fdac8b8d169
RDX: 0000000000000f34 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007fdac9a8d090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007fdac8da5fa0 R15: 00007ffe6f9823f8
 </TASK>