panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 1078
Starting stack trace...
panic(ffffffff830e919c) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff8309d1bc,ffffffff83015053,436,ffffffff8300c1e1) at __assert+0x29
rtrequest(1,ffff80002a1061b0,38,ffff80002a106130,0) at rtrequest+0xdce sys/net/route.c:1078
rtm_output(ffff800001333000,ffff80002a106258,ffff80002a1061b0,38,0) at rtm_output+0x855 sys/net/rtsock.c:973
route_output(fffffd8068dae800,ffff800001413cd0) at route_output+0x9a1 sys/net/rtsock.c:878
route_send(ffff800001413cd0,fffffd8068dae800,0,0) at route_send+0xd7 sys/net/rtsock.c:342
sosend(ffff800001413cd0,0,ffff80002a106408,0,0,802) at sosend+0xa40
sendit(ffff800029fd9958,3,ffff80002a106500,802,ffff80002a1065b0) at sendit+0x721 sys/kern/uipc_syscalls.c:786
sys_sendto(ffff800029fd9958,ffff80002a106660,ffff80002a1065b0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:564
syscall(ffff80002a106660) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline]
syscall(ffff80002a106660) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xc49b1a17330, count: 246
End of stack trace.