bridge: check brport attr show in brport_show

[pandora-kernel.git] / fs / partitions / mac.c

diff --git a/fs/partitions/mac.c b/fs/partitions/mac.c
index 11f688b..f51c930 100644 (file)
--- a/fs/partitions/mac.c
+++ b/fs/partitions/mac.c
@@ -32,7 +32,7 @@ int mac_partition(struct parsed_partitions *state)
        Sector sect;
        unsigned char *data;
        int slot, blocks_in_map;
-       unsigned secsize;
+       unsigned secsize, datasize, partoffset;
 #ifdef CONFIG_PPC_PMAC
        int found_root = 0;
        int found_root_goodness = 0;
@@ -50,10 +50,14 @@ int mac_partition(struct parsed_partitions *state)
        }
        secsize = be16_to_cpu(md->block_size);
        put_dev_sector(sect);
-       data = read_part_sector(state, secsize/512, &sect);
+       datasize = round_down(secsize, 512);
+       data = read_part_sector(state, datasize / 512, &sect);
        if (!data)
                return -1;
-       part = (struct mac_partition *) (data + secsize%512);
+       partoffset = secsize % 512;
+       if (partoffset + sizeof(*part) > datasize)
+               return -1;
+       part = (struct mac_partition *) (data + partoffset);
        if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) {
                put_dev_sector(sect);
                return 0;               /* not a MacOS disk */