[PATCH 42/98] block: partitions/mac: compute the sectors in 64 bits

[Jens Axboe <axboe@kernel.dk>]

From: Josef Bacik <josef@toxicpanda.com>

start_block and block_count are converted to 512 byte sectors in 32-bit
arithmetic, although put_partition() takes a sector_t. With a block size
above 512 bytes anything beyond 2TiB wraps and the partition lands on
top of another one.

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 block/partitions/mac.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/block/partitions/mac.c b/block/partitions/mac.c
index df03ca428e15..f372392af95b 100644
--- a/block/partitions/mac.c
+++ b/block/partitions/mac.c
@@ -97,8 +97,8 @@ int mac_partition(struct parsed_partitions *state)
 		if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC)
 			break;
 		put_partition(state, slot,
-			be32_to_cpu(part->start_block) * (secsize/512),
-			be32_to_cpu(part->block_count) * (secsize/512));
+			(sector_t)be32_to_cpu(part->start_block) * (secsize/512),
+			(sector_t)be32_to_cpu(part->block_count) * (secsize/512));
 
 		if (!strncasecmp(part->type, "Linux_RAID", 10))
 			state->parts[slot].flags = ADDPART_FLAG_RAID;
-- 
2.56.0