R13: 00000000000003f9 R14: 00000000004c6b11 R15: 00007f081a2536d4
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1342 at block/genhd.c:827 __device_add_disk+0xe1e/0x1130 block/genhd.c:827
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 1342 Comm: syz-executor.4 Not tainted 5.7.0-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+0x1e9/0x30e lib/dump_stack.c:118
 panic+0x264/0x7a0 kernel/panic.c:221
 __warn+0x209/0x210 kernel/panic.c:582
 report_bug+0x1ac/0x2d0 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:105 [inline]
 do_error_trap+0xca/0x1c0 arch/x86/kernel/traps.c:197
 do_invalid_op+0x32/0x40 arch/x86/kernel/traps.c:216
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027
RIP: 0010:__device_add_disk+0xe1e/0x1130 block/genhd.c:827
Code: ff e8 a6 cd e8 fd 0f 0b e9 66 fe ff ff e8 9a cd e8 fd 0f 0b e9 f2 f2 ff ff e8 8e cd e8 fd 0f 0b e9 3d f9 ff ff e8 82 cd e8 fd <0f> 0b e9 d9 f7 ff ff e8 76 cd e8 fd 42 80 3c 3b 00 0f 85 3d fd ff
RSP: 0018:ffffc90008d57da8 EFLAGS: 00010246
RAX: ffffffff838bd5ae RBX: 00000000fffffff4 RCX: 0000000000040000
RDX: ffffc90011ce4000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffff888069c52000 R08: ffffffff838bcd81 R09: ffffed1015d270fc
R10: ffffed1015d270fc R11: 0000000000000000 R12: ffff88809f18a0a0
R13: ffff88809f18a000 R14: 1ffff11013e314c7 R15: 1ffff11013e31401
 add_disk include/linux/genhd.h:296 [inline]
 loop_add+0x5a9/0x750 drivers/block/loop.c:2168
 loop_control_ioctl+0x42e/0x640 drivers/block/loop.c:2291
 vfs_ioctl fs/ioctl.c:47 [inline]
 ksys_ioctl fs/ioctl.c:771 [inline]
 __do_sys_ioctl fs/ioctl.c:780 [inline]
 __se_sys_ioctl+0xf9/0x160 fs/ioctl.c:778
 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295
 entry_SYSCALL_64_after_hwframe+0x49/0xb3
RIP: 0033:0x45ca59
Code: 0d b7 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 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f081a252c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e9020 RCX: 000000000045ca59
RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 00000000000003f9 R14: 00000000004c6b11 R15: 00007f081a2536d4
Kernel Offset: disabled
Rebooting in 86400 seconds..