panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 1089
Starting stack trace...
panic(ffffffff833af0e0) at panic+0x1d0 sys/kern/subr_prf.c:229
__assert(ffffffff833f1725,ffffffff8337696b,441,ffffffff83420d3d) at __assert+0x29 sys/kern/subr_prf.c:-1
rt_hash(1,ffff80002a300718,8) at rt_hash
rt_ifa_add(ffff8000015cbf00,40004,ffff8000015cbf78,0) at rt_ifa_add+0x22e sys/net/route.c:1284
in_ifinit(ffff80003c411dc0,ffff8000015cbf00,ffff80002a3008e0,1) at in_ifinit+0x540 sys/netinet/in.c:-1
pppx_add_session(ffff80000002c200,ffff800001610400) at pppx_add_session+0x47b sys/net/if_pppx.c:717
VOP_IOCTL(fffffd800e1349a0,82907003,ffff800001610400,81,fffffd80097fd478,ffff80002a261ca0) at VOP_IOCTL+0xac sys/kern/vfs_vops.c:264
vn_ioctl(fffffd806d1b8b60,82907003,ffff800001610400,ffff80002a261ca0) at vn_ioctl+0xf8 sys/kern/vfs_vnops.c:531
sys_ioctl(ffff80002a261ca0,ffff80002a300cf0,ffff80002a300c40) at sys_ioctl+0x674 sys/kern/sys_generic.c:-1
syscall(ffff80002a300cf0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline]
syscall(ffff80002a300cf0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775
Xsyscall() at Xsyscall+0x128
end of kernel
end trace frame: 0xb46c3b1fab0, count: 246
End of stack trace.