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SubjectRe: [PATCH] ext2: skip pages past number of blocks in ext2_find_entry
Randy Dunlap wrote:

> Please don't hide the goto; un-indent 1 tab stop.
Whoops, thanks Randy - it wasn't intentional. :)

Signed-off-by: Eric Sandeen <sandeen@redhat.com>

Index: linux-2.6.19/fs/ext2/dir.c
===================================================================
--- linux-2.6.19.orig/fs/ext2/dir.c
+++ linux-2.6.19/fs/ext2/dir.c
@@ -368,6 +368,14 @@ struct ext2_dir_entry_2 * ext2_find_entr
}
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;

-
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