panic: kernel diagnostic assertion "info->rti_ifa->ifa_ifp != NULL" fai

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 459198ba8b84 Improve b64_ntop use in print-lwres
git tree: openbsd
console output: https://syzkaller.appspot.com/x/log.txt?x=15a34db0580000
kernel config: https://syzkaller.appspot.com/x/.config?x=1bc15e68cd2a49e5
dashboard link: https://syzkaller.appspot.com/bug?extid=8efede526b1dde972be4

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/f7d83e445429/disk-459198ba.raw.xz
bsd.gdb: https://storage.googleapis.com/syzbot-assets/4b617a28f5c2/bsd-459198ba.gdb.xz
kernel image: https://storage.googleapis.com/syzbot-assets/ce5c7f22186b/kernel-459198ba.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8efede...@syzkaller.appspotmail.com

panic: kernel diagnostic assertion "info->rti_ifa->ifa_ifp != NULL" fai
led: file "/syzkaller/managers/main/kernel/sys/net/route.c", line 990
Starting stack trace...
panic(ffffffff83403dad) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff833b1f0f,ffffffff83353f8a,3de,ffffffff8332e518) at __assert+0x29
rtrequest(1,ffff80002a8c5938,38,ffff80002a8c58b0,0) at rtrequest+0xef0 rtlabel_id2sa sys/net/route.c:1803 [inline]
rtrequest(1,ffff80002a8c5938,38,ffff80002a8c58b0,0) at rtrequest+0xef0 sys/net/route.c:984
rtm_output(ffff8000015d2a00,ffff80002a8c59e0,ffff80002a8c5938,38,0) at rtm_output+0x855 sys/net/rtsock.c:973
route_output(fffffd806bc6f000,ffff800001498e90) at route_output+0x9ac sys/net/rtsock.c:878
route_send(ffff800001498e90,fffffd806bc6f000,0,0) at route_send+0xd7 sys/net/rtsock.c:342
sosend(ffff800001498e90,0,ffff80002a8c5b88,0,0,0) at sosend+0x824
sendit(ffff80002a903c68,5,ffff80002a8c5c80,0,ffff80002a8c5d30) at sendit+0x721 sys/kern/uipc_syscalls.c:779
sys_sendto(ffff80002a903c68,ffff80002a8c5de0,ffff80002a8c5d30) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557
syscall(ffff80002a8c5de0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xbd90e52b220, count: 246
End of stack trace.


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.