r0 = syz_open_procfs(0x0, &(0x7f0000000000)='pagemap\x00')
preadv(r0, &(0x7f0000001880)=[{&(0x7f0000000400)=""/4096, 0x1000}, {0x0, 0x8}], 0x2, 0x0, 0x0)