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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2016-01-08 00:51:13 +0100 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2016-01-08 00:51:13 +0100 |
| commit | abaee091a18c19ccd86feb1c8374585d82e96777 (patch) | |
| tree | 01602bae73e1278c3d98dafe1c269049927c58ce /block/partitions/mac.c | |
| parent | cxlflash: Enable device id for future IBM CXL adapter (diff) | |
| parent | ses: fix discovery of SATA devices in SAS enclosures (diff) | |
| download | linux-abaee091a18c19ccd86feb1c8374585d82e96777.tar.xz linux-abaee091a18c19ccd86feb1c8374585d82e96777.zip | |
Merge branch 'jejb-scsi' into misc
Diffstat (limited to 'block/partitions/mac.c')
| -rw-r--r-- | block/partitions/mac.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/block/partitions/mac.c b/block/partitions/mac.c index c2c48ec64b27..621317ac4d59 100644 --- a/block/partitions/mac.c +++ b/block/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, §); + datasize = round_down(secsize, 512); + data = read_part_sector(state, datasize / 512, §); 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 */ |