r0 = syz_open_procfs(0xffffffffffffffff, &(0x7f0000000080)='net/ip_mr_vif\x00')
preadv(r0, &(0x7f00000014c0)=[{&(0x7f0000000140)=""/209, 0xd1}], 0x1, 0x1, 0x0)