panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 1078
Starting stack trace...
panic(ffffffff830eb61e) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff830a4453,ffffffff8301e0d3,436,ffffffff83014b9f) at __assert+0x29
rtrequest(1,ffff8000371ea7b0,38,ffff8000371ea730,0) at rtrequest+0xdce sys/net/route.c:1078
rtm_output(ffff8000015ac900,ffff8000371ea858,ffff8000371ea7b0,38,0) at rtm_output+0x855 sys/net/rtsock.c:973
route_output(fffffd806864b600,ffff800010fded08) at route_output+0x9a1 sys/net/rtsock.c:878
route_send(ffff800010fded08,fffffd806864b600,0,0) at route_send+0xd7 sys/net/rtsock.c:342
sosend(ffff800010fded08,0,ffff8000371eaa08,0,0,802) at sosend+0xa40
sendit(ffff800029fe67e0,3,ffff8000371eab00,802,ffff8000371eabb0) at sendit+0x721 sys/kern/uipc_syscalls.c:786
sys_sendto(ffff800029fe67e0,ffff8000371eac60,ffff8000371eabb0) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:564
syscall(ffff8000371eac60) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline]
syscall(ffff8000371eac60) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0x515ca2617e0, count: 246
End of stack trace.