Fix a possible overflow when shifting a sector size to a byte count

Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>

diff --git a/util.c b/util.c
index 3a4a0853f49b0707b5aefa8879b46f42f5ff3f64..5bac0ec4003ed6123931378d64c18163df716f41 100644 (file)
--- a/util.c
+++ b/util.c
@@ -221,8 +221,10 @@ int load_super(int fd, mdp_super_t *super)
        {
                if (ioctl(fd, BLKGETSIZE, &size))
                        return 1;
-               else
-                       dsize = size << 9;
+               else {
+                       dsize = size;
+                       dsize <<= 9;
+               }
        }
 
        if (dsize < MD_RESERVED_SECTORS*2)