RAX: ffffffffffffffda RBX: 00007fd8141e6180 RCX: 00007fd813f8eec9 RDX: 00000000000000fd RSI: 0000200000007ec0 RDI: 0000000000000004 RBP: 00007fd814e68090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fd8141e6218 R14: 00007fd8141e6180 R15: 00007ffe8b2e9bf8 ===================================== WARNING: bad unlock balance detected! syzkaller #0 Not tainted ------------------------------------- syz.3.392/7837 is trying to release lock (event_mutex) at: [] seq_read_iter+0x60d/0x12c0 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.3.392/7837: #0: ffff888032b55cf8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x2a2/0x370 fs/file.c:1232 #1: ffff8880330b6b08 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xe1/0x12c0 fs/seq_file.c:182 stack backtrace: CPU: 1 UID: 0 PID: 7837 Comm: syz.3.392 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025 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+0xa2/0x7b0 kernel/locking/mutex.c:922 seq_read_iter+0x60d/0x12c0 fs/seq_file.c:251 seq_read+0x3a3/0x570 fs/seq_file.c:162 vfs_read+0x1e1/0xcf0 fs/read_write.c:570 ksys_read+0x12a/0x250 fs/read_write.c:715 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd813f8eec9 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:00007fd814e68038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007fd8141e6180 RCX: 00007fd813f8eec9 RDX: 00000000000000fd RSI: 0000200000007ec0 RDI: 0000000000000004 RBP: 00007fd814e68090 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fd8141e6218 R14: 00007fd8141e6180 R15: 00007ffe8b2e9bf8