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-rw-r--r--fs/ext2/dir.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 0b02ba9642d2..e89bfc8cf957 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -368,6 +368,14 @@ struct ext2_dir_entry_2 * ext2_find_entry (struct inode * dir,
}
if (++n >= npages)
n = 0;
+ /* next page is past the blocks we've got */
+ if (unlikely(n > (dir->i_blocks >> (PAGE_CACHE_SHIFT - 9)))) {
+ ext2_error(dir->i_sb, __FUNCTION__,
+ "dir %lu size %lld exceeds block count %llu",
+ dir->i_ino, dir->i_size,
+ (unsigned long long)dir->i_blocks);
+ goto out;
+ }
} while (n != start);
out:
return NULL;