r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000540)='/proc/mdstat\x00', 0x0, 0x0)
lseek(r0, 0x9e46, 0x0)
readv(r0, &(0x7f0000000100)=[{&(0x7f0000000080)=""/123, 0x7b}], 0x1)