r0 = openat$procfs(0xffffffffffffff9c, &(0x7f0000000080)='/proc/vmallocinfo\x00', 0x0, 0x0)
preadv(r0, &(0x7f00000009c0)=[{&(0x7f0000000600)=""/72, 0x48}], 0x1, 0x0, 0x0)