RDX: 00007fd1a442eb0a RSI: 0000000000000002 RDI: 00007fd1a442eb00
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000005
R13: 00000000004c8910 R14: 00000000004df598 R15: 0000000000000004
WARNING: CPU: 1 PID: 3703 at block/genhd.c:709 __device_add_disk+0xe63/0x10b0 /block/genhd.c:709
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 3703 Comm: syz-executor.0 Not tainted 4.19.59 #32
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+0x172/0x1f0 /lib/dump_stack.c:113
 panic+0x263/0x507 /kernel/panic.c:185
 __warn.cold+0x20/0x4a /kernel/panic.c:540
 report_bug+0x263/0x2b0 /lib/bug.c:186
 fixup_bug /arch/x86/kernel/traps.c:178 [inline]
 fixup_bug /arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x204/0x360 /arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 /arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 /arch/x86/entry/entry_64.S:1013
RIP: 0010:__device_add_disk+0xe63/0x10b0 /block/genhd.c:709
Code: ff ff 4c 89 e7 e8 4d 31 8c fe e9 dc f2 ff ff e8 c3 31 8c fe e9 b7 f5 ff ff e8 19 c0 55 fe 0f 0b e9 92 fb ff ff e8 0d c0 55 fe <0f> 0b e9 9a fe ff ff e8 f1 92 29 fe 4c 89 f7 e8 59 31 8c fe e9 e1
RSP: 0018:ffff88805c897480 EFLAGS: 00010246
RAX: 0000000000040000 RBX: ffff88805c897568 RCX: ffffc90005e77000
RDX: 0000000000040000 RSI: ffffffff83155613 RDI: 0000000000000005
RBP: ffff88805c897590 R08: ffff888063c48080 R09: ffff888063c48920
R10: 0000000000000000 R11: 0000000000000000 R12: ffff888064bf8a00
R13: ffff888064bf8a90 R14: 00000000fffffff4 R15: 0000000000000000
 device_add_disk+0x23/0x30 /block/genhd.c:729
 add_disk /./include/linux/genhd.h:408 [inline]
 loop_add+0x650/0x8d0 /drivers/block/loop.c:2014
 loop_probe+0x161/0x1a0 /drivers/block/loop.c:2086
 kobj_lookup+0x260/0x460 /drivers/base/map.c:124
 get_gendisk+0x4d/0x380 /block/genhd.c:844
 bdev_get_gendisk /fs/block_dev.c:1080 [inline]
 __blkdev_get+0x457/0x1660 /fs/block_dev.c:1466
 blkdev_get+0xc4/0x990 /fs/block_dev.c:1625
 blkdev_open+0x205/0x290 /fs/block_dev.c:1783
 do_dentry_open+0x4c3/0x1200 /fs/open.c:777
 vfs_open+0xa0/0xd0 /fs/open.c:886
 do_last /fs/namei.c:3418 [inline]
 path_openat+0x10d7/0x4690 /fs/namei.c:3534
 do_filp_open+0x1a1/0x280 /fs/namei.c:3564
 do_sys_open+0x3fe/0x550 /fs/open.c:1069
 __do_sys_open /fs/open.c:1087 [inline]
 __se_sys_open /fs/open.c:1082 [inline]
 __x64_sys_open+0x7e/0xc0 /fs/open.c:1082
 do_syscall_64+0xfd/0x620 /arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413701
Code: 75 14 b8 02 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 19 00 00 c3 48 83 ec 08 e8 0a fa ff ff 48 89 04 24 b8 02 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fa ff ff 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007fd1a442ea80 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000020000068 RCX: 0000000000413701
RDX: 00007fd1a442eb0a RSI: 0000000000000002 RDI: 00007fd1a442eb00
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000005
R13: 00000000004c8910 R14: 00000000004df598 R15: 0000000000000004
Kernel Offset: disabled
Rebooting in 86400 seconds..