r0 = openat(0xffffffffffffff9c, &(0x7f0000000100)='./file1\x00', 0x42, 0x0)
prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x0, &(0x7f0000000080))
preadv2(r0, &(0x7f0000001800)=[{&(0x7f0000000680)=""/4096, 0x1000}, {&(0x7f0000001680)=""/5, 0x5}, {&(0x7f00000016c0)=""/178, 0xb2}, {&(0x7f0000001780)=""/118, 0x76}], 0x4, 0xffffffff, 0xfffffffb, 0x4)