ocfs2: Mounting device (7,4) on (node local, slot 0) with ordered data mode. (syz.4.41,3935,0):ocfs2_read_blocks:240 ERROR: status = -12 ===================================== WARNING: bad unlock balance detected! 5.15.167-syzkaller #0 Not tainted ------------------------------------- syz.4.41/3935 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: 2 locks held by syz.4.41/3935: #0: ffff88807b2dcd38 (&osb->obs_trim_fs_mutex){+.+.}-{3:3}, at: ocfs2_trim_fs_lock_res_init+0x31/0x4c0 fs/ocfs2/dlmglue.c:702 #1: ffff888056d73488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline] #1: ffff888056d73488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_trim_mainbm fs/ocfs2/alloc.c:7550 [inline] #1: ffff888056d73488 (&ocfs2_sysfile_lock_key[args->fi_sysfile_type]#2){+.+.}-{3:3}, at: ocfs2_trim_fs+0xb17/0x2830 fs/ocfs2/alloc.c:7688 stack backtrace: CPU: 0 PID: 3935 Comm: syz.4.41 Not tainted 5.15.167-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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_read_block fs/ocfs2/buffer_head_io.h:52 [inline] ocfs2_read_group_descriptor+0xe3/0x230 fs/ocfs2/suballoc.c:299 ocfs2_trim_mainbm fs/ocfs2/alloc.c:7592 [inline] ocfs2_trim_fs+0xe9a/0x2830 fs/ocfs2/alloc.c:7688 ocfs2_ioctl+0x72c/0x7d0 fs/ocfs2/ioctl.c:921 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xf1/0x160 fs/ioctl.c:860 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: 0033:0x7f7b0b791ff9 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:00007f7b09c0a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f7b0b949f80 RCX: 00007f7b0b791ff9 RDX: 0000000020000680 RSI: 00000000c0185879 RDI: 0000000000000004 RBP: 00007f7b0b804296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f7b0b949f80 R15: 00007ffe218cba88 (syz.4.41,3935,1):ocfs2_trim_mainbm:7596 ERROR: status = -12