panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 1078
Starting stack trace...
panic(ffffffff82951c55) at panic+0x16f sys/kern/subr_prf.c:229
__assert(ffffffff82909745,ffffffff82883f7f,436,ffffffff8287b149) at __assert+0x29 sys/kern/subr_prf.c:157
rtrequest(1,ffff800032748dc0,0,ffff800032748d40,0) at rtrequest+0xa23 sys/net/route.c:1078
rtm_output(ffff800000fc7200,ffff800032748e68,ffff800032748dc0,0,0) at rtm_output+0x614 sys/net/rtsock.c:959
route_output(fffffd8073177600,ffff800000eacb60) at route_output+0x6a7 sys/net/rtsock.c:864
route_send(ffff800000eacb60,fffffd8073177600,0,0) at route_send+0x8f sys/net/rtsock.c:340
sosend(ffff800000eacb60,0,ffff800032749018,0,0,0) at sosend+0x663
sendit(ffff800030906310,3,ffff800032749110,0,ffff8000327491c0) at sendit+0x54c sys/kern/uipc_syscalls.c:786
sys_sendto(ffff800030906310,ffff800032749270,ffff8000327491c0) at sys_sendto+0x84 sys/kern/uipc_syscalls.c:564
syscall(ffff800032749270) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline]
syscall(ffff800032749270) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xdfb5b055190, count: 246
End of stack trace.