RBP: 00007f33c4bf6090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f33c6fa5fa0 R15: 00007ffc73884f68 ===================================== WARNING: bad unlock balance detected! 6.14.0-rc7-syzkaller-00137-g5fc319360819 #0 Tainted: G U ------------------------------------- syz.9.4363/25282 is trying to release lock (event_mutex) at: [] 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.9.4363/25282: #0: ffff8880657577b8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x267/0x390 fs/file.c:1192 #1: ffff888030010418 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182 stack backtrace: CPU: 0 UID: 0 PID: 25282 Comm: syz.9.4363 Tainted: G U 6.14.0-rc7-syzkaller-00137-g5fc319360819 #0 Tainted: [U]=USER Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call Trace: __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 do_loop_readv_writev fs/read_write.c:840 [inline] do_loop_readv_writev fs/read_write.c:828 [inline] vfs_readv+0x6c2/0x8a0 fs/read_write.c:1013 do_readv+0x133/0x340 fs/read_write.c:1073 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: 0033:0x7f33c6d8d169 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:00007f33c4bf6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000013 RAX: ffffffffffffffda RBX: 00007f33c6fa5fa0 RCX: 00007f33c6d8d169 RDX: 0000000000000001 RSI: 0000200000000a80 RDI: 0000000000000003 RBP: 00007f33c4bf6090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 0000000000000000 R14: 00007f33c6fa5fa0 R15: 00007ffc73884f68