IPv6: RTM_NEWROUTE with no NLM_F_CREATE or NLM_F_REPLACE
IPv6: NLM_F_REPLACE set, but no existing node found!
WARNING: CPU: 1 PID: 7400 at net/ipv6/ip6_fib.c:1360 fib6_add+0x1106/0x14c0 net/ipv6/ip6_fib.c:1360
kobject: 'loop4' (00000000cd3dde70): kobject_uevent_env
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 7400 Comm: syz-executor0 Not tainted 4.20.0-rc4+ #103
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+0x244/0x39d lib/dump_stack.c:113
 panic+0x2ad/0x55c kernel/panic.c:188
kobject: 'loop4' (00000000cd3dde70): fill_kobj_path: path = '/devices/virtual/block/loop4'
 __warn.cold.8+0x20/0x45 kernel/panic.c:540
kobject: 'loop5' (00000000f192409d): kobject_uevent_env
kobject: 'loop5' (00000000f192409d): fill_kobj_path: path = '/devices/virtual/block/loop5'
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
kobject: 'loop3' (00000000f0f3f565): kobject_uevent_env
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:fib6_add+0x1106/0x14c0 net/ipv6/ip6_fib.c:1360
Code: 08 49 8d bf a8 0c 00 00 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 8d 03 00 00 4d 8b bf a8 0c 00 00 e9 15 fd ff ff e8 3a b8 9f fa <0f> 0b 48 8b 95 f0 fc ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea
RSP: 0018:ffff888197cd6e40 EFLAGS: 00010212
kobject: 'loop3' (00000000f0f3f565): fill_kobj_path: path = '/devices/virtual/block/loop3'
RAX: 0000000000040000 RBX: ffff888197cd7590 RCX: ffffc90005dd6000
RDX: 000000000000937d RSI: ffffffff86dfd2c6 RDI: ffff8881c0fdbba0
RBP: ffff888197cd7198 R08: ffff88818f9f8540 R09: ffffed103725d79d
R10: ffffed103725d79d R11: ffff8881b92ebcef R12: 00000000fffffffe
R13: ffff8881c0fdbb80 R14: ffff8881bbc5d100 R15: 0000000000000000
kobject: 'loop2' (00000000a898e3e0): kobject_uevent_env
kobject: 'loop2' (00000000a898e3e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop2' (00000000a898e3e0): kobject_uevent_env
kobject: 'loop2' (00000000a898e3e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
 __ip6_ins_rt+0x54/0x80 net/ipv6/route.c:1155
 ip6_route_multipath_add+0x94f/0x18b0 net/ipv6/route.c:4391
kobject: 'loop3' (00000000f0f3f565): kobject_uevent_env
 inet6_rtm_newroute+0xe3/0x160 net/ipv6/route.c:4521
kobject: 'loop3' (00000000f0f3f565): fill_kobj_path: path = '/devices/virtual/block/loop3'
 rtnetlink_rcv_msg+0x46a/0xc20 net/core/rtnetlink.c:4950
 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2477
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:4968
 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline]
 netlink_unicast+0x5a5/0x760 net/netlink/af_netlink.c:1336
 netlink_sendmsg+0xa18/0xfc0 net/netlink/af_netlink.c:1917
kobject: 'loop2' (00000000a898e3e0): kobject_uevent_env
 sock_sendmsg_nosec net/socket.c:621 [inline]
 sock_sendmsg+0xd5/0x120 net/socket.c:631
 ___sys_sendmsg+0x7fd/0x930 net/socket.c:2116
kobject: 'loop2' (00000000a898e3e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
 __sys_sendmsg+0x11d/0x280 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+0x1b9/0x820 arch/x86/entry/common.c:290
kobject: 'loop3' (00000000f0f3f565): kobject_uevent_env
kobject: 'loop3' (00000000f0f3f565): fill_kobj_path: path = '/devices/virtual/block/loop3'
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457679
Code: fd b3 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 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007feae0667c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457679
RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007feae06686d4
kobject: 'loop2' (00000000a898e3e0): kobject_uevent_env
R13: 00000000004c4417 R14: 00000000004d73a8 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..