RBP: 00007ffedda29af0 R08: 0000000000000002 R09: 00007fc440003438
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
kobject_add_internal failed for loop0 (error: -12 parent: block)
------------[ cut here ]------------
kernel BUG at fs/sysfs/group.c:113!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 7949 Comm: syz-executor247 Not tainted 4.14.277-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880b34024c0 task.stack: ffff8880a2ed8000
RIP: 0010:internal_create_group+0x55f/0x710 fs/sysfs/group.c:113
RSP: 0018:ffff8880a2edfb00 EFLAGS: 00010297
RAX: ffff8880b34024c0 RBX: ffff8880b3c5aaa0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880b3c5aaa0
RBP: ffff8880aa9e0f30 R08: ffffffff8b9dd0c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff88faf460
R13: ffff8880aa9e1178 R14: 0000000000000000 R15: ffff8880b3c5aad0
FS:  00005555565da300(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c2262f6c0 CR3: 00000000b0055000 CR4: 00000000003406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 blk_register_queue+0xd3/0x350 block/blk-sysfs.c:891
 device_add_disk+0x97c/0xdc0 block/genhd.c:683
 add_disk include/linux/genhd.h:396 [inline]
 loop_add+0x615/0x830 drivers/block/loop.c:1904
 loop_control_ioctl+0x11a/0x3f0 drivers/block/loop.c:2001
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7fc440e76689
RSP: 002b:00007ffedda29ae8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fc440e76689
RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 00007ffedda29af0 R08: 0000000000000002 R09: 00007fc440003438
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Code: 48 c1 ea 03 80 3c 02 00 0f 84 9c fd ff ff e8 f9 0c db ff e9 92 fd ff ff e8 cf 54 b1 ff 4d 85 f6 0f 85 16 fb ff ff e8 c1 54 b1 ff <0f> 0b e8 ba 54 b1 ff 49 83 fe ef 74 18 e8 af 54 b1 ff 45 89 f7 
RIP: internal_create_group+0x55f/0x710 fs/sysfs/group.c:113 RSP: ffff8880a2edfb00
---[ end trace 18fc350eaae62ecd ]---