panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/route.c", line 1078
Starting stack trace...
panic(ffffffff82928c10) at panic+0x159 sys/kern/subr_prf.c:229
__assert(ffffffff828e1b69,ffffffff8289316d,436,ffffffff828570c7) at __assert+0x29 sys/kern/subr_prf.c:157
rtrequest(1,ffff80002db2ee88,0,ffff80002db2ee00,0) at rtrequest+0xb49 sys/net/route.c:1078
rtm_output(ffff800000e35200,ffff80002db2ef30,ffff80002db2ee88,0,0) at rtm_output+0x614 sys/net/rtsock.c:959
route_output(fffffd806e1f7500,fffffd8070dae3d0) at route_output+0x6bb sys/net/rtsock.c:864
route_send(fffffd8070dae3d0,fffffd806e1f7500,0,0) at route_send+0x8f sys/net/rtsock.c:340
sosend(fffffd8070dae3d0,0,ffff80002db2f0e8,0,0,0) at sosend+0x663
sendit(ffff80002a67ed10,3,ffff80002db2f1e0,0,ffff80002db2f290) at sendit+0x54c sys/kern/uipc_syscalls.c:786
sys_sendto(ffff80002a67ed10,ffff80002db2f340,ffff80002db2f290) at sys_sendto+0x84 sys/kern/uipc_syscalls.c:564
syscall(ffff80002db2f340) at syscall+0x72a sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6cb554ca4b0, count: 246
End of stack trace.