diff options
Diffstat (limited to 'drivers/md/dm-pcache/cache.c')
| -rw-r--r-- | drivers/md/dm-pcache/cache.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/md/dm-pcache/cache.c b/drivers/md/dm-pcache/cache.c index 534bf07b794f..887157fde68d 100644 --- a/drivers/md/dm-pcache/cache.c +++ b/drivers/md/dm-pcache/cache.c @@ -119,6 +119,10 @@ int cache_pos_decode(struct pcache_cache *cache, return -EIO; pos->cache_seg = &cache->segments[latest.cache_seg_id]; + + if (latest.seg_off >= pos->cache_seg->segment.data_size) + return -EIO; + pos->seg_off = latest.seg_off; *seq = latest.header.seq; *index = (latest_addr - pos_onmedia); @@ -246,6 +250,13 @@ static int get_seg_id(struct pcache_cache *cache, } else { *seg_id = cache->cache_info.seg_id; } + + if (*seg_id >= cache_dev->seg_num) { + pcache_dev_err(pcache, "invalid segment id %u from cache device (seg_num %u)\n", + *seg_id, cache_dev->seg_num); + ret = -EIO; + goto err; + } } return 0; err: @@ -261,6 +272,13 @@ static int cache_segs_init(struct pcache_cache *cache) int ret; u32 i; + if (cache_info->n_segs > cache->cache_dev->seg_num) { + pcache_dev_err(CACHE_TO_PCACHE(cache), + "cache_info n_segs %u exceeds cache device segments %u\n", + cache_info->n_segs, cache->cache_dev->seg_num); + return -EIO; + } + for (i = 0; i < cache_info->n_segs; i++) { ret = get_seg_id(cache, prev_cache_seg, new_cache, &seg_id); if (ret) |