diff options
| -rw-r--r-- | drivers/md/dm-pcache/cache_key.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/md/dm-pcache/cache_key.c b/drivers/md/dm-pcache/cache_key.c index def81b74a181..c855301fd6d8 100644 --- a/drivers/md/dm-pcache/cache_key.c +++ b/drivers/md/dm-pcache/cache_key.c @@ -762,7 +762,7 @@ int cache_replay(struct pcache_cache *cache) struct pcache_cache_pos pos_tail; struct pcache_cache_pos *pos; struct pcache_cache_kset_onmedia *kset_onmedia; - u32 to_copy, count = 0; + u32 to_copy, count = 0, last_hops = 0; int ret = 0; kset_onmedia = kzalloc(PCACHE_KSET_ONMEDIA_SIZE_MAX, GFP_KERNEL); @@ -797,6 +797,11 @@ int cache_replay(struct pcache_cache *cache) pcache_dev_debug(pcache, "last kset replay, next: %u\n", kset_onmedia->next_cache_seg_id); + if (++last_hops > cache->n_segs) { + ret = -EIO; + goto out; + } + next_seg = &cache->segments[kset_onmedia->next_cache_seg_id]; pos->cache_seg = next_seg; |