RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffd1e6aef2f R14: 00007fb5cb2a8300 R15: 0000000000022000
kobject_add_internal failed for 43:0 with -EEXIST, don't try to register things with the same name in the same directory.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 10721 at block/genhd.c:741 register_disk block/genhd.c:613 [inline]
WARNING: CPU: 0 PID: 10721 at block/genhd.c:741 __device_add_disk+0xca7/0xf30 block/genhd.c:745
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 10721 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+0x96/0xe0 lib/dump_stack.c:118
 panic+0x2a1/0x52a kernel/panic.c:221
 __warn.cold.10+0x25/0x25 kernel/panic.c:582
 report_bug+0x1aa/0x260 lib/bug.c:195
 fixup_bug arch/x86/kernel/traps.c:179 [inline]
 fixup_bug arch/x86/kernel/traps.c:174 [inline]
 do_error_trap+0x12d/0x1e0 arch/x86/kernel/traps.c:272
 do_invalid_op+0x31/0x40 arch/x86/kernel/traps.c:291
 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1028
RIP: 0010:__device_add_disk+0xca7/0xf30 block/genhd.c:741
Code: 83 e2 07 38 d0 7f 08 84 c0 0f 85 5c 02 00 00 41 80 a6 cc 00 00 00 ef e9 b3 f9 ff ff 0f 0b e9 e6 f9 ff ff 0f 0b e9 05 f7 ff ff <0f> 0b e9 dd fb ff ff 48 89 ef e8 da bf 3d fe e9 7b f4 ff ff e8 b0
RSP: 0018:ffff888088df7390 EFLAGS: 00010282
RAX: 00000000ffffffef RBX: 1ffff110111bee7a RCX: 0000000000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff88808b373a14
RBP: ffff88808a818608 R08: fffffbfff1bd9b3e R09: fffffbfff1bd9b3e
R10: fffffbfff1bd9b3d R11: ffffffff8decd9ef R12: ffff88808a818090
R13: 0000000000000001 R14: ffff88808a818000 R15: ffff88808a818004
 add_disk include/linux/genhd.h:429 [inline]
 nbd_dev_add+0x6e9/0x820 drivers/block/nbd.c:1720
 nbd_genl_connect+0x494/0x122d drivers/block/nbd.c:1837
 genl_family_rcv_msg+0x5ff/0xf40 net/netlink/genetlink.c:629
 genl_rcv_msg+0xb3/0x160 net/netlink/genetlink.c:654
 netlink_rcv_skb+0x119/0x340 net/netlink/af_netlink.c:2477
 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:665
 netlink_unicast_kernel net/netlink/af_netlink.c:1302 [inline]
 netlink_unicast+0x3fc/0x5c0 net/netlink/af_netlink.c:1328
 netlink_sendmsg+0x71e/0xb70 net/netlink/af_netlink.c:1917
 sock_sendmsg_nosec net/socket.c:637 [inline]
 sock_sendmsg+0xac/0xf0 net/socket.c:657
 ___sys_sendmsg+0x653/0x950 net/socket.c:2311
 __sys_sendmsg+0xce/0x170 net/socket.c:2356
 do_syscall_64+0x8e/0x4e0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x465ef9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb5cb2a8188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9
RDX: 0000000000000000 RSI: 0000000020000240 RDI: 0000000000000005
RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007ffd1e6aef2f R14: 00007fb5cb2a8300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..