panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/route.c", line 1078
Starting stack trace...
panic(ffffffff830b259a) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff83068fa3,ffffffff83015936,436,ffffffff82fd9300) at __assert+0x29
rtrequest(1,ffff80002a54f038,38,ffff80002a54efb0,0) at rtrequest+0xf4d sys/net/route.c:1078
rtm_output(ffff800000b51d00,ffff80002a54f0e0,ffff80002a54f038,38,0) at rtm_output+0x855 sys/net/rtsock.c:973
route_output(fffffd8071c41200,fffffd807807d018) at route_output+0x9ac sys/net/rtsock.c:878
route_send(fffffd807807d018,fffffd8071c41200,0,0) at route_send+0xd7 sys/net/rtsock.c:342
sosend(fffffd807807d018,0,ffff80002a54f298,0,0,802) at sosend+0xa40
sendit(ffff80002bfdacd0,4,ffff80002a54f390,802,ffff80002a54f440) at sendit+0x721 sys/kern/uipc_syscalls.c:786
sys_sendto(ffff80002bfdacd0,ffff80002a54f4f0,ffff80002a54f440) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:564
syscall(ffff80002a54f4f0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x6dbe374ee80, count: 246
End of stack trace.