RSP: 002b:00007f4f0cf4d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f4f0c225fa0 RCX: 00007f4f0bf9f559
RDX: 00000000000001ff RSI: 0000200000000680 RDI: ffffffffffffff9c
RBP: 00007f4f0c036b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f0c226038 R14: 00007f4f0c225fa0 R15: 00007ffe3156a5b8
 </TASK>
------------[ cut here ]------------
kernel BUG at fs/configfs/dir.c:734!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 6807 Comm: syz.1.341 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026
RIP: 0010:create_default_group+0x14e/0x180 fs/configfs/dir.c:734
Code: c0 74 04 3c 03 7e 43 41 81 4c 24 38 80 00 00 00 eb 8a e8 75 15 3d ff 48 8d 5d 08 48 89 5d 00 e9 f4 fe ff ff e8 63 15 3d ff 90 <0f> 0b bd f4 ff ff ff e9 73 ff ff ff 48 89 ef e8 2e ff b6 ff e9 c8
RSP: 0018:ffffc900061a7b80 EFLAGS: 00010283
RAX: 00000000000183cd RBX: ffff888052e009c0 RCX: ffffc900044ca000
RDX: 0000000000080000 RSI: ffffffff82d12d7d RDI: ffff888052e00a28
RBP: 00000000fffffff4 R08: 0000000000000000 R09: 00000000fffffff4
R10: ffff888055e61843 R11: 0000000000000000 R12: ffff888050c3e1a0
R13: ffff8880385d5500 R14: ffff888054980710 R15: 0000000000000000
FS:  00007f4f0cf4d6c0(0000) GS:ffff888122490000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f0cf2bff8 CR3: 000000002c830000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 populate_groups fs/configfs/dir.c:750 [inline]
 configfs_attach_group fs/configfs/dir.c:923 [inline]
 configfs_attach_group+0x212/0x440 fs/configfs/dir.c:900
 create_default_group+0x75/0x180 fs/configfs/dir.c:729
 populate_groups fs/configfs/dir.c:750 [inline]
 configfs_attach_group fs/configfs/dir.c:923 [inline]
 configfs_attach_group+0x212/0x440 fs/configfs/dir.c:900
 configfs_mkdir+0x657/0xd40 fs/configfs/dir.c:1432
 vfs_mkdir+0x367/0x850 fs/namei.c:5422
 filename_mkdirat+0x48b/0x5e0 fs/namei.c:5455
 __do_sys_mkdirat fs/namei.c:5476 [inline]
 __se_sys_mkdirat fs/namei.c:5473 [inline]
 __x64_sys_mkdirat+0x89/0xc0 fs/namei.c:5473
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f0bf9f559
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4f0cf4d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f4f0c225fa0 RCX: 00007f4f0bf9f559
RDX: 00000000000001ff RSI: 0000200000000680 RDI: ffffffffffffff9c
RBP: 00007f4f0c036b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f0c226038 R14: 00007f4f0c225fa0 R15: 00007ffe3156a5b8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:create_default_group+0x14e/0x180 fs/configfs/dir.c:734
Code: c0 74 04 3c 03 7e 43 41 81 4c 24 38 80 00 00 00 eb 8a e8 75 15 3d ff 48 8d 5d 08 48 89 5d 00 e9 f4 fe ff ff e8 63 15 3d ff 90 <0f> 0b bd f4 ff ff ff e9 73 ff ff ff 48 89 ef e8 2e ff b6 ff e9 c8
RSP: 0018:ffffc900061a7b80 EFLAGS: 00010283
RAX: 00000000000183cd RBX: ffff888052e009c0 RCX: ffffc900044ca000
RDX: 0000000000080000 RSI: ffffffff82d12d7d RDI: ffff888052e00a28
RBP: 00000000fffffff4 R08: 0000000000000000 R09: 00000000fffffff4
R10: ffff888055e61843 R11: 0000000000000000 R12: ffff888050c3e1a0
R13: ffff8880385d5500 R14: ffff888054980710 R15: 0000000000000000
FS:  00007f4f0cf4d6c0(0000) GS:ffff888122590000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002c830000 CR4: 00000000003526f0