loop3: detected capacity change from 0 to 512
------------[ cut here ]------------
Looking for class "c->lock" with key init_kmem_cache_cpus.__key, but found a different class "&c->lock" with the same key
WARNING: CPU: 1 PID: 6978 at kernel/locking/lockdep.c:941 look_up_lock_class+0xdc/0x170 kernel/locking/lockdep.c:938
Modules linked in:
CPU: 1 UID: 0 PID: 6978 Comm: syz.3.213 Not tainted 6.13.0-syzkaller-07078-gb46c89c08f41 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:look_up_lock_class+0xdc/0x170 kernel/locking/lockdep.c:938
Code: 01 0f 85 8a 00 00 00 c6 05 8d d4 17 04 01 90 49 8b 16 49 8b 76 18 48 8b 8b b8 00 00 00 48 c7 c7 00 b1 0a 8c e8 25 54 93 f5 90 <0f> 0b 90 90 eb 61 90 e8 18 f2 ef f8 e8 93 d5 b2 f5 48 c7 c7 40 b0
RSP: 0018:ffffc9001020f370 EFLAGS: 00010046
RAX: 98dbf2587323f300 RBX: ffffffff93c3b960 RCX: 0000000000080000
RDX: ffffc9000deb3000 RSI: 0000000000009b7d RDI: 0000000000009b7e
RBP: ffffc9001020f480 R08: ffffffff817ff9a2 R09: 1ffff110170e519a
R10: dffffc0000000000 R11: ffffed10170e519b R12: ffffe8ffffd691c0
R13: ffffe8ffffd691c0 R14: ffffe8ffffd691c0 R15: ffffffff9a4242c0
FS:  00007fbc163826c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbc15570160 CR3: 000000002f124000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 register_lock_class+0x102/0x980 kernel/locking/lockdep.c:1292
 __lock_acquire+0xf3/0x2100 kernel/locking/lockdep.c:5103
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 local_lock_acquire+0x20/0x80 include/linux/local_lock_internal.h:29
 ___slab_alloc+0x119d/0x14a0 mm/slub.c:3879
 __slab_alloc+0x58/0xa0 mm/slub.c:3920
 __slab_alloc_node mm/slub.c:3995 [inline]
 slab_alloc_node mm/slub.c:4156 [inline]
 kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4175
 ext4_mb_add_groupinfo+0x6bf/0xe70 fs/ext4/mballoc.c:3356
 ext4_mb_init_backend fs/ext4/mballoc.c:3435 [inline]
 ext4_mb_init+0x15ab/0x27e0 fs/ext4/mballoc.c:3733
 __ext4_fill_super fs/ext4/super.c:5551 [inline]
 ext4_fill_super+0x57f5/0x66f0 fs/ext4/super.c:5722
 get_tree_bdev_flags+0x48c/0x5c0 fs/super.c:1636
 vfs_get_tree+0x90/0x2b0 fs/super.c:1814
 do_new_mount+0x2be/0xb40 fs/namespace.c:3560
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4088
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbc1558e4ca
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:00007fbc16381e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fbc16381ef0 RCX: 00007fbc1558e4ca
RDX: 0000000020000180 RSI: 0000000020000000 RDI: 00007fbc16381eb0
RBP: 0000000020000180 R08: 00007fbc16381ef0 R09: 000000000021081e
R10: 000000000021081e R11: 0000000000000246 R12: 0000000020000000
R13: 00007fbc16381eb0 R14: 00000000000004fa R15: 00000000200001c0
 </TASK>