panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/main/kernel/sys/net/route.c", line 1095
Starting stack trace...
panic(ffffffff83402da5) at panic+0x1ba sys/kern/subr_prf.c:229
__assert(ffffffff833b2723,ffffffff8335a7f7,447,ffffffff83315ddc) at __assert+0x29
rtrequest(1,ffff80003c9f5258,8,ffff80003c9f5328,0) at rtrequest+0xf7d sys/net/route.c:1095
rt_ifa_add(ffff80000146d600,40004,ffff80000146d668,0) at rt_ifa_add+0x38d sys/net/route.c:1295
in_ifinit(ffff80002a881b40,ffff80000146d600,ffff80003c9f5448,1) at in_ifinit+0x542
pppx_add_session(ffff800001470e00,ffff800000b51800) at pppx_add_session+0x474 sys/net/if_pppx.c:729
VOP_IOCTL(fffffd806a3f7570,82907003,ffff800000b51800,1,fffffd807f7d7820,ffff80002a7e0a50) at VOP_IOCTL+0xa3 sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806b84ed30,82907003,ffff800000b51800,ffff80002a7e0a50) at vn_ioctl+0xea sys/kern/vfs_vnops.c:531
sys_ioctl(ffff80002a7e0a50,ffff80003c9f5860,ffff80003c9f57b0) at sys_ioctl+0x5bf
syscall(ffff80003c9f5860) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb7e65b19eb0, count: 246
End of stack trace.