panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/route.c", line 1078
Starting stack trace...
panic(ffffffff82939523) at panic+0x159 sys/kern/subr_prf.c:229
__assert(ffffffff828ec351,ffffffff8289e9cf,436,ffffffff82862e15) at __assert+0x29 sys/kern/subr_prf.c:157
rtrequest(1,ffff80002db5f388,0,ffff80002db5f300,0) at rtrequest+0xb49 sys/net/route.c:1078
rtm_output(ffff800000db5f00,ffff80002db5f430,ffff80002db5f388,0,0) at rtm_output+0x614 sys/net/rtsock.c:959
route_output(fffffd806fbe3400,fffffd806ee6bb88) at route_output+0x6bb sys/net/rtsock.c:864
route_send(fffffd806ee6bb88,fffffd806fbe3400,0,0) at route_send+0x8f sys/net/rtsock.c:340
sosend(fffffd806ee6bb88,0,ffff80002db5f5e8,0,0,0) at sosend+0x663
sendit(ffff80002a6aef88,3,ffff80002db5f6e0,0,ffff80002db5f790) at sendit+0x54c sys/kern/uipc_syscalls.c:786
sys_sendto(ffff80002a6aef88,ffff80002db5f840,ffff80002db5f790) at sys_sendto+0x84 sys/kern/uipc_syscalls.c:564
syscall(ffff80002db5f840) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc00d7b75990, count: 246
End of stack trace.