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Commit 1f6fa261 authored by Jaegeuk Kim's avatar Jaegeuk Kim
Browse files

f2fs: remove f2fs_bug_on in terms of max_depth 



There is no report on this bug_on case, but if malicious attacker changed this
field intentionally, we can just reset it as a MAX value.

Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 732d5648

fs/f2fs/dir.c

+8 −2
Original line number Diff line number Diff line
@@ -172,8 +172,6 @@ static struct f2fs_dir_entry *find_in_level(struct inode *dir, 


	namehash = f2fs_dentry_hash(&name);



	f2fs_bug_on(F2FS_I_SB(dir), level > MAX_DIR_HASH_DEPTH);



	nbucket = dir_buckets(level, F2FS_I(dir)->i_dir_level);

	nblock = bucket_blocks(level);
@@ -238,6 +236,14 @@ struct f2fs_dir_entry *f2fs_find_entry(struct inode *dir, 
		goto out;



	max_depth = F2FS_I(dir)->i_current_depth;

	if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) {

		f2fs_msg(F2FS_I_SB(dir)->sb, KERN_WARNING,

				"Corrupted max_depth of %lu: %u",

				dir->i_ino, max_depth);

		max_depth = MAX_DIR_HASH_DEPTH;

		F2FS_I(dir)->i_current_depth = max_depth;

		mark_inode_dirty(dir);

	}



	for (level = 0; level < max_depth; level++) {

		de = find_in_level(dir, level, &fname, res_page);