panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/route.c", line 1078
Starting stack trace...
panic(ffffffff8292c965) at panic+0x159 sys/kern/subr_prf.c:229
__assert(ffffffff828e4a61,ffffffff8288f86c,436,ffffffff828539c0) at __assert+0x29 sys/kern/subr_prf.c:157
rtrequest(1,ffff800032834f48,0,ffff800032834ec0,0) at rtrequest+0xb49 sys/net/route.c:1078
rtm_output(ffff8000006c0300,ffff800032834ff0,ffff800032834f48,0,0) at rtm_output+0x614 sys/net/rtsock.c:959
route_output(fffffd806e16ea00,fffffd806bbb1d80) at route_output+0x6bb sys/net/rtsock.c:864
route_send(fffffd806bbb1d80,fffffd806e16ea00,0,0) at route_send+0x8f sys/net/rtsock.c:340
sosend(fffffd806bbb1d80,0,ffff8000328351a8,0,0,0) at sosend+0x663
sendit(ffff8000329a27f0,4,ffff8000328352a0,0,ffff800032835350) at sendit+0x54c sys/kern/uipc_syscalls.c:786
sys_sendto(ffff8000329a27f0,ffff800032835400,ffff800032835350) at sys_sendto+0x84 sys/kern/uipc_syscalls.c:564
syscall(ffff800032835400) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xbdd67c8a080, count: 246
End of stack trace.