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block: partitions/mac: compute the sectors in 64 bits

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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: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Link: https://patch.msgid.link/20261028164415.1262013-43-axboe@kernel.dk
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Josef Bacik 2026-10-28 10:41:45 -06:00 committed by Jens Axboe
parent 4fcc499ea9
commit 6c55f94317
1 changed files with 2 additions and 2 deletions
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4
block/partitions/mac.c
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@ -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;