panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/route.c", line 1046
Starting stack trace...
panic(ffffffff82927b8e) at panic+0x159 sys/kern/subr_prf.c:229
__assert(ffffffff828e10c6,ffffffff8288fc13,416,ffffffff82853e57) at __assert+0x29 sys/kern/subr_prf.c:157
rtrequest(1,ffff800037864d58,0,ffff800037864cd0,0) at rtrequest+0xb49 sys/net/route.c:1046

rtm_output(ffff800000f5d800,ffff800037864e00,ffff800037864d58,0,0) at rtm_output+0x614 sys/net/rtsock.c:959
route_output(fffffd807cd6a100,fffffd805b4707a0) at route_output+0x6bb sys/net/rtsock.c:864
route_send(fffffd805b4707a0,fffffd807cd6a100,0,0) at route_send+0x8f sys/net/rtsock.c:340
sosend(fffffd805b4707a0,0,ffff800037864fb8,0,0,0) at sosend+0x663
sendit(ffff80002a6c6d58,3,ffff8000378650b0,0,ffff800037865150) at sendit+0x555 sys/kern/uipc_syscalls.c:786
sys_sendto(ffff80002a6c6d58,ffff800037865200,ffff800037865150) at sys_sendto+0x84 sys/kern/uipc_syscalls.c:564
syscall(ffff800037865200) at syscall+0x538 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xa01859beb40, count: 246
End of stack trace.
syncing disks...set $lines = 0
set $maxwidth = 0
show panic
trace
show registers
show proc
ps
show all locks
show malloc
show all pools
machine ddbcpu 0
trace
machine ddbcpu 1
trace