------------[ cut here ]------------ WARNING: CPU: 0 PID: 6345 at kernel/locking/lockdep.c:894 look_up_lock_class+0x86/0x110 kernel/locking/lockdep.c:894 Modules linked in: CPU: 0 PID: 6345 Comm: syz-executor.0 Not tainted 5.10.197 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:look_up_lock_class+0x86/0x110 kernel/locking/lockdep.c:894 Code: 24 e8 ce 02 00 00 4d 85 e4 74 2c 49 39 5c 24 40 75 eb 48 8b 45 18 49 39 84 24 b0 00 00 00 74 1a 48 81 7d 00 00 b2 14 86 74 10 <0f> 0b eb 0c e8 71 29 0b fe 85 c0 75 50 45 31 e4 48 83 c4 08 4c 89 RSP: 0018:ffff888049c3f580 EFLAGS: 00010002 RAX: ffffffff845342e0 RBX: ffffffff871b24e1 RCX: 0000000000000000 RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffff88801da429d8 RBP: ffff88801da429d8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000246 R11: 0000000000000001 R12: ffffffff868b1780 R13: ffffffff86bee9e0 R14: 0000000000000001 R15: 0000000000000000 FS: 00007f3bc47ad700(0000) GS:ffff88806ce00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb4a9686004 CR3: 0000000018236000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: register_lock_class+0xbb/0x17b0 kernel/locking/lockdep.c:1244 __lock_acquire+0x102/0x5b00 kernel/locking/lockdep.c:4833 lock_acquire kernel/locking/lockdep.c:5565 [inline] lock_acquire+0x197/0x470 kernel/locking/lockdep.c:5530 down_write_nested+0x96/0x160 kernel/locking/rwsem.c:1667 ext4_double_down_write_data_sem fs/ext4/move_extent.c:58 [inline] ext4_move_extents+0x990/0x3270 fs/ext4/move_extent.c:610 __ext4_ioctl+0x302e/0x4190 fs/ext4/ioctl.c:999 vfs_ioctl fs/ioctl.c:48 [inline] __do_sys_ioctl fs/ioctl.c:753 [inline] __se_sys_ioctl fs/ioctl.c:739 [inline] __x64_sys_ioctl+0x19a/0x210 fs/ioctl.c:739 do_syscall_64+0x33/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x62/0xc7 RIP: 0033:0x7f3bc7237b19 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3bc47ad188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f3bc734af60 RCX: 00007f3bc7237b19 RDX: 0000000020000040 RSI: 00000000c028660f RDI: 0000000000000003 RBP: 00007f3bc7291f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdf80f3d6f R14: 00007f3bc47ad300 R15: 0000000000022000 irq event stamp: 1275 hardirqs last enabled at (1275): [] asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:635 hardirqs last disabled at (1274): [] sysvec_apic_timer_interrupt+0xb/0xa0 arch/x86/kernel/apic/apic.c:1094 softirqs last enabled at (1088): [] asm_call_irq_on_stack+0x12/0x20 softirqs last disabled at (1083): [] asm_call_irq_on_stack+0x12/0x20 ---[ end trace ebf1181df0008e0d ]--- EXT4-fs (loop1): Mount option "data_err=abort" incompatible with ext2 EXT4-fs (loop6): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): Mount option "data_err=abort" incompatible with ext2 EXT4-fs (loop7): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop6): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop7): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop6): mounted filesystem without journal. Opts: ,errors=continue