diff options
Diffstat (limited to 'drivers/md/dm-clone-metadata.c')
| -rw-r--r-- | drivers/md/dm-clone-metadata.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/md/dm-clone-metadata.c b/drivers/md/dm-clone-metadata.c index c05b12110456..199e7af00858 100644 --- a/drivers/md/dm-clone-metadata.c +++ b/drivers/md/dm-clone-metadata.c @@ -850,6 +850,12 @@ int dm_clone_set_region_hydrated(struct dm_clone_metadata *cmd, unsigned long re struct dirty_map *dmap; unsigned long word, flags; + if (unlikely(region_nr >= cmd->nr_regions)) { + DMERR("Region %lu out of range (total number of regions %lu)", + region_nr, cmd->nr_regions); + return -ERANGE; + } + word = region_nr / BITS_PER_LONG; spin_lock_irqsave(&cmd->bitmap_lock, flags); @@ -879,6 +885,13 @@ int dm_clone_cond_set_range(struct dm_clone_metadata *cmd, unsigned long start, struct dirty_map *dmap; unsigned long word, region_nr; + if (unlikely(start >= cmd->nr_regions || (start + nr_regions) < start || + (start + nr_regions) > cmd->nr_regions)) { + DMERR("Invalid region range: start %lu, nr_regions %lu (total number of regions %lu)", + start, nr_regions, cmd->nr_regions); + return -ERANGE; + } + spin_lock_irq(&cmd->bitmap_lock); if (cmd->read_only) { |