r0 = openat(0xffffffffffffff9c, &(0x7f0000000000)='./file1\x00', 0x882c2, 0x0)
r1 = syz_open_procfs(0x0, &(0x7f0000000180)='net/ip_tables_matches\x00')
r2 = dup2(r1, r0)
writev(r2, &(0x7f0000000700)=[{&(0x7f00000002c0)="03", 0x1}], 0x1)