loop4: detected capacity change from 0 to 2048 ------------[ cut here ]------------ Looking for class "->lock" with key init_kmem_cache_cpus.__key, but found a different class "&c->lock" with the same key WARNING: CPU: 1 PID: 7394 at kernel/locking/lockdep.c:939 look_up_lock_class+0xdc/0x170 kernel/locking/lockdep.c:936 Modules linked in: CPU: 1 UID: 0 PID: 7394 Comm: syz.4.178 Not tainted 6.13.0-rc2-syzkaller-00036-g231825b2e1ff #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:look_up_lock_class+0xdc/0x170 kernel/locking/lockdep.c:936 Code: 01 0f 85 8a 00 00 00 c6 05 82 31 42 04 01 90 49 8b 16 49 8b 76 18 48 8b 8b b8 00 00 00 48 c7 c7 e0 b8 0a 8c e8 55 c7 9f f5 90 <0f> 0b 90 90 eb 61 90 e8 e8 72 f6 f8 e8 83 23 bf f5 48 c7 c7 20 b8 RSP: 0018:ffffc90004537330 EFLAGS: 00010046 RAX: 675927a766fa5800 RBX: ffffffff93be79a0 RCX: 0000000000080000 RDX: ffffc9000daf6000 RSI: 0000000000008a3e RDI: 0000000000008a3f RBP: ffffc90004537440 R08: ffffffff81600962 R09: 1ffff110170e519a R10: dffffc0000000000 R11: ffffed10170e519b R12: ffffe8ffffd6a920 R13: ffffe8ffffd6a920 R14: ffffe8ffffd6a920 R15: ffffffff9a3d0320 FS: 00007fd044fe26c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd044163360 CR3: 000000002a0ee000 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:1290 __lock_acquire+0xf3/0x2100 kernel/locking/lockdep.c:5101 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5849 local_lock_acquire+0x20/0x80 include/linux/local_lock_internal.h:29 ___slab_alloc+0x119c/0x14a0 mm/slub.c:3864 __slab_alloc+0x58/0xa0 mm/slub.c:3905 __slab_alloc_node mm/slub.c:3980 [inline] slab_alloc_node mm/slub.c:4141 [inline] kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4160 ext4_mb_add_groupinfo+0x6c3/0xfa0 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:5559 [inline] ext4_fill_super+0x5f54/0x6e60 fs/ext4/super.c:5733 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:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4057 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034 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: 0033:0x7fd0441816ba 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:00007fd044fe1e88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fd044fe1f10 RCX: 00007fd0441816ba RDX: 0000000020000780 RSI: 0000000020000480 RDI: 00007fd044fe1ed0 RBP: 0000000020000780 R08: 00007fd044fe1f10 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000480 R13: 00007fd044fe1ed0 R14: 0000000000000787 R15: 0000000020000280 </TASK>