RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc7811546d4
R13: 00000000004c4071 R14: 00000000004d8668 R15: 0000000000000007
------------[ cut here ]------------
WARNING: CPU: 0 PID: 31550 at block/genhd.c:741 __device_add_disk+0xda0/0x10a0 block/genhd.c:741
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 31550 Comm: syz-executor.1 Not tainted 5.4.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fb/0x318 lib/dump_stack.c:118
 panic+0x264/0x7a9 kernel/panic.c:221
 __warn+0x20e/0x210 kernel/panic.c:582
 report_bug+0x1b6/0x2f0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 do_error_trap+0xd7/0x440 arch/x86/kernel/traps.c:272
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:__device_add_disk+0xda0/0x10a0 block/genhd.c:741
Code: ff e8 34 21 3d fe 0f 0b e9 60 fe ff ff e8 28 21 3d fe 0f 0b e9 79 f3 ff ff e8 1c 21 3d fe 0f 0b e9 8a f9 ff ff e8 10 21 3d fe <0f> 0b e9 38 f8 ff ff e8 04 21 3d fe e9 30 fd ff ff 44 89 e9 80 e1
RSP: 0018:ffff888050307c90 EFLAGS: 00010246
RAX: ffffffff83365640 RBX: 00000000fffffff4 RCX: 0000000000040000
RDX: ffffc9000835b000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffff888050307d30 R08: ffffffff83364e72 R09: fffffbfff12bc2a6
R10: fffffbfff12bc2a6 R11: 0000000000000000 R12: ffff8880a758c000
R13: 1ffff11014eb18c1 R14: ffff8880a758c090 R15: 1ffff11014eb1801
 device_add_disk+0x2a/0x40 block/genhd.c:763
 add_disk include/linux/genhd.h:429 [inline]
 loop_add+0x5d1/0x780 drivers/block/loop.c:2061
 loop_control_ioctl+0x422/0x640 drivers/block/loop.c:2184
 do_vfs_ioctl+0x744/0x1730 fs/ioctl.c:46
 ksys_ioctl fs/ioctl.c:713 [inline]
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0xe3/0x120 fs/ioctl.c:718
 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45a639
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fc781153c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fc781153c90 RCX: 000000000045a639
RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc7811546d4
R13: 00000000004c4071 R14: 00000000004d8668 R15: 0000000000000007
Kernel Offset: disabled
Rebooting in 86400 seconds..