(syz.0.80,4330,0):ocfs2_read_blocks:240 ERROR: status = -12 ===================================== WARNING: bad unlock balance detected! 5.15.167-syzkaller #0 Not tainted ------------------------------------- syz.0.80/4330 is trying to release lock (&oi->ip_io_mutex) at: [] ocfs2_read_blocks+0x108d/0x1490 fs/ocfs2/buffer_head_io.c:394 but there are no more locks to release! other info that might help us debug this: 1 lock held by syz.0.80/4330: #0: ffff88807b9da0e0 (&type->s_umount_key#79/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229 stack backtrace: CPU: 0 PID: 4330 Comm: syz.0.80 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106 print_unlock_imbalance_bug+0x248/0x2b0 kernel/locking/lockdep.c:5065 __lock_release kernel/locking/lockdep.c:5302 [inline] lock_release+0x596/0x9a0 kernel/locking/lockdep.c:5643 __mutex_unlock_slowpath+0xde/0x750 kernel/locking/mutex.c:851 ocfs2_read_blocks+0x108d/0x1490 fs/ocfs2/buffer_head_io.c:394 ocfs2_map_slot_buffers fs/ocfs2/slot_map.c:385 [inline] ocfs2_init_slot_info+0xae4/0x1350 fs/ocfs2/slot_map.c:424 ocfs2_initialize_super fs/ocfs2/super.c:2300 [inline] ocfs2_fill_super+0x48ea/0x58a0 fs/ocfs2/super.c:995 mount_bdev+0x2c9/0x3f0 fs/super.c:1398 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1528 do_new_mount+0x2ba/0xb40 fs/namespace.c:3005 do_mount fs/namespace.c:3348 [inline] __do_sys_mount fs/namespace.c:3556 [inline] __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3533 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f2c44e7e69a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f2c432f4e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f2c432f4ef0 RCX: 00007f2c44e7e69a RDX: 0000000020004440 RSI: 0000000020000040 RDI: 00007f2c432f4eb0 RBP: 0000000020004440 R08: 00007f2c432f4ef0 R09: 00000000010008d0 R10: 00000000010008d0 R11: 0000000000000246 R12: 0000000020000040 R13: 00007f2c432f4eb0 R14: 000000000000443f R15: 0000000020000280 (syz.0.80,4330,0):ocfs2_map_slot_buffers:388 ERROR: status = -12 (syz.0.80,4330,0):ocfs2_init_slot_info:426 ERROR: status = -12 (syz.0.80,4330,0):ocfs2_initialize_super:2302 ERROR: status = -12 (syz.0.80,4330,0):ocfs2_fill_super:1177 ERROR: status = -12