Fix bus error when accessing MBR partition records

[thirdparty/mdadm.git] / super-mbr.c

diff --git a/super-mbr.c b/super-mbr.c
index 62b3f03126cbda2a3a19af14cb123f2646cfff7f..f5e4ceabbfbab24135bc37c64bf08e2c50881fbe 100644 (file)
--- a/super-mbr.c
+++ b/super-mbr.c
@@ -57,6 +57,11 @@ static void examine_mbr(struct supertype *st, char *homehost)
 
        printf("   MBR Magic : %04x\n", sb->magic);
        for (i = 0; i < MBR_PARTITIONS; i++)
+               /*
+                * Have to make every access through sb rather than using a
+                * pointer to the partition table (or an entry), since the
+                * entries are not properly aligned.
+                */
                if (sb->parts[i].blocks_num)
                        printf("Partition[%d] : %12lu sectors at %12lu (type %02x)\n",
                               i,
@@ -151,6 +156,11 @@ static void getinfo_mbr(struct supertype *st, struct mdinfo *info, char *map)
        info->component_size = 0;
 
        for (i = 0; i < MBR_PARTITIONS ; i++)
+               /*
+                * Have to make every access through sb rather than using a
+                * pointer to the partition table (or an entry), since the
+                * entries are not properly aligned.
+                */
                if (sb->parts[i].blocks_num) {
                        unsigned long last =
                                (unsigned long)__le32_to_cpu(sb->parts[i].blocks_num)