------------[ cut here ]------------ Cannot find parent device WARNING: CPU: 1 PID: 18757 at net/batman-adv/hard-interface.c:182 batadv_is_on_batman_iface+0x3e8/0x450 net/batman-adv/hard-interface.c:182 kobject: 'loop3' (0000000094c5c43b): kobject_uevent_env Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 18757 Comm: syz-executor2 Not tainted 4.20.0+ #8 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+0x1db/0x2d0 lib/dump_stack.c:113 kobject: 'loop3' (0000000094c5c43b): fill_kobj_path: path = '/devices/virtual/block/loop3' panic+0x2cb/0x589 kernel/panic.c:189 __warn.cold+0x20/0x4b kernel/panic.c:544 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+0x11b/0x200 arch/x86/kernel/traps.c:271 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:290 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973 RIP: 0010:batadv_is_on_batman_iface+0x3e8/0x450 net/batman-adv/hard-interface.c:182 Code: ff ff 4c 89 7d c8 e9 ff fe ff ff 48 8b 7d c0 e8 2e 9f f4 f9 e9 ff fc ff ff e8 f4 cb b0 f9 48 c7 c7 40 0f fb 88 e8 38 23 7a f9 <0f> 0b eb bb e8 2f 9f f4 f9 e9 45 fc ff ff 48 8b 7d c8 e8 21 9f f4 RSP: 0018:ffff888083b16b88 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff888058028800 RCX: ffffc90009df9000 RDX: 0000000000015cc7 RSI: ffffffff816849b6 RDI: 0000000000000006 RBP: ffff888083b16bd0 R08: ffff8880920ea140 R09: ffff8880920ea9e0 R10: ffff8880920ea140 R11: 0000000000000000 R12: 0000000000000000 R13: ffff8880961b80c0 R14: 0000000000000038 R15: ffff8880961b80c0 batadv_is_valid_iface net/batman-adv/hard-interface.c:205 [inline] batadv_hardif_add_interface net/batman-adv/hard-interface.c:917 [inline] batadv_hard_if_event+0x935/0x1240 net/batman-adv/hard-interface.c:1043 notifier_call_chain+0x179/0x380 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2e/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x3f/0x90 net/core/dev.c:1739 call_netdevice_notifiers_extack net/core/dev.c:1751 [inline] call_netdevice_notifiers net/core/dev.c:1765 [inline] register_netdevice+0xae0/0x10b0 net/core/dev.c:8658 ip6gre_newlink_common.isra.0+0x165/0x3d0 net/ipv6/ip6_gre.c:1944 ip6gre_newlink+0x37a/0x9b0 net/ipv6/ip6_gre.c:1977 __rtnl_newlink+0x1281/0x1a70 net/core/rtnetlink.c:3182 rtnl_newlink+0x69/0xa0 net/core/rtnetlink.c:3240 rtnetlink_rcv_msg+0x481/0xc30 net/core/rtnetlink.c:5125 netlink_rcv_skb+0x17d/0x410 net/netlink/af_netlink.c:2477 rtnetlink_rcv+0x1d/0x30 net/core/rtnetlink.c:5143 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x574/0x770 net/netlink/af_netlink.c:1336 netlink_sendmsg+0xa05/0xf90 net/netlink/af_netlink.c:1917 sock_sendmsg_nosec net/socket.c:621 [inline] sock_sendmsg+0xdd/0x130 net/socket.c:631 ___sys_sendmsg+0x7ec/0x910 net/socket.c:2116 __sys_sendmsg+0x112/0x270 net/socket.c:2154 __do_sys_sendmsg net/socket.c:2163 [inline] __se_sys_sendmsg net/socket.c:2161 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2161 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457ec9 Code: 6d 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f006392ec78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457ec9 RDX: 0000000000000000 RSI: 00000000200005c0 RDI: 0000000000000003 RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f006392f6d4 R13: 00000000004c51fb R14: 00000000004d8ab8 R15: 00000000ffffffff Kernel Offset: disabled Rebooting in 86400 seconds..