diff options
Diffstat (limited to 'block/partitions/mac.c')
| -rw-r--r-- | block/partitions/mac.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/block/partitions/mac.c b/block/partitions/mac.c index 7b521df00a39..b02530d98629 100644 --- a/block/partitions/mac.c +++ b/block/partitions/mac.c @@ -20,6 +20,7 @@ extern void note_bootable_part(dev_t dev, int part, int goodness); * Code to understand MacOS partition tables. */ +#ifdef CONFIG_PPC_PMAC static inline void mac_fix_string(char *stg, int len) { int i; @@ -27,6 +28,7 @@ static inline void mac_fix_string(char *stg, int len) for (i = len - 1; i >= 0 && stg[i] == ' '; i--) stg[i] = 0; } +#endif int mac_partition(struct parsed_partitions *state) { @@ -51,13 +53,25 @@ int mac_partition(struct parsed_partitions *state) } secsize = be16_to_cpu(md->block_size); put_dev_sector(sect); + + /* + * If the "block size" is not a power of 2, things get weird - we might + * end up with a partition straddling a sector boundary, so we wouldn't + * be able to read a partition entry with read_part_sector(). + * Real block sizes are probably (?) powers of two, so just require + * that. + */ + if (!is_power_of_2(secsize)) + return -1; datasize = round_down(secsize, 512); data = read_part_sector(state, datasize / 512, §); if (!data) return -1; partoffset = secsize % 512; - if (partoffset + sizeof(*part) > datasize) + if (partoffset + sizeof(*part) > datasize) { + put_dev_sector(sect); return -1; + } part = (struct mac_partition *) (data + partoffset); if (be16_to_cpu(part->signature) != MAC_PARTITION_MAGIC) { put_dev_sector(sect); @@ -110,8 +124,8 @@ int mac_partition(struct parsed_partitions *state) int i, l; goodness++; - l = strlen(part->name); - if (strcmp(part->name, "/") == 0) + l = strnlen(part->name, sizeof(part->name)); + if (strncmp(part->name, "/", sizeof(part->name)) == 0) goodness++; for (i = 0; i <= l - 4; ++i) { if (strncasecmp(part->name + i, "root", |