RBP: 00007f2126401090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f21257b6038 R14: 00007f21257b5fa0 R15: 00007ffd8c261b28 ===================================== WARNING: bad unlock balance detected! 6.17.0-rc1-syzkaller-00016-g8742b2d8935f #0 Tainted: G U ------------------------------------- syz.1.1407/13116 is trying to release lock (event_mutex) at: [] traverse.part.0.constprop.0+0x2c0/0x640 fs/seq_file.c:131 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz.1.1407/13116: #0: ffff888059ecd540 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xe1/0x12c0 fs/seq_file.c:182 stack backtrace: CPU: 0 UID: 0 PID: 13116 Comm: syz.1.1407 Tainted: G U 6.17.0-rc1-syzkaller-00016-g8742b2d8935f #0 PREEMPT(full) Tainted: [U]=USER Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 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:5298 [inline] print_unlock_imbalance_bug+0x11b/0x130 kernel/locking/lockdep.c:5272 __lock_release kernel/locking/lockdep.c:5537 [inline] lock_release+0x242/0x2f0 kernel/locking/lockdep.c:5889 __mutex_unlock_slowpath+0xa7/0x800 kernel/locking/mutex.c:922 traverse.part.0.constprop.0+0x2c0/0x640 fs/seq_file.c:131 traverse fs/seq_file.c:98 [inline] seq_read_iter+0x932/0x12c0 fs/seq_file.c:195 seq_read+0x3a3/0x570 fs/seq_file.c:162 vfs_read+0x1e4/0xcf0 fs/read_write.c:570 ksys_pread64 fs/read_write.c:763 [inline] __do_sys_pread64 fs/read_write.c:771 [inline] __se_sys_pread64 fs/read_write.c:768 [inline] __x64_sys_pread64+0x1eb/0x250 fs/read_write.c:768 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x490 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f212558ebe9 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:00007f2126401038 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 00007f21257b5fa0 RCX: 00007f212558ebe9 RDX: 0000000073528428 RSI: 0000200000002680 RDI: 0000000000000003 RBP: 00007f2126401090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000001 R13: 00007f21257b6038 R14: 00007f21257b5fa0 R15: 00007ffd8c261b28