3.5.7.17 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
commit 64cb927371cd2ec43758d8a094a003d27bc3d0dc upstream.
Both ext3 and ext4 htree_dirblock_to_tree() is just filling the
in-core rbtree for use by call_filldir(). All updates of ->f_pos are
done by the latter; bumping it here (on error) is obviously wrong - we
might very well have it nowhere near the block we'd found an error in.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
[ luis: backported to 3.5: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
fs/ext3/namei.c | 7 ++-----
fs/ext4/namei.c | 7 ++-----
2 files changed, 4 insertions(+), 10 deletions(-)
diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c
index eeb63df..336256a 100644
--- a/fs/ext3/namei.c
+++ b/fs/ext3/namei.c
@@ -573,11 +573,8 @@ static int htree_dirblock_to_tree(struct file *dir_file,
if (!ext3_check_dir_entry("htree_dirblock_to_tree", dir, de, bh,
(block<<EXT3_BLOCK_SIZE_BITS(dir->i_sb))
+((char *)de - bh->b_data))) {
- /* On error, skip the f_pos to the next block. */
- dir_file->f_pos = (dir_file->f_pos |
- (dir->i_sb->s_blocksize - 1)) + 1;
- brelse (bh);
- return count;
+ /* silently ignore the rest of the block */
+ break;
}
ext3fs_dirhash(de->name, de->name_len, hinfo);
if ((hinfo->hash < start_hash) ||
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 20c13eb..43a35db 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -859,11 +859,8 @@ static int htree_dirblock_to_tree(struct file *dir_file,
if (ext4_check_dir_entry(dir, NULL, de, bh,
(block<<EXT4_BLOCK_SIZE_BITS(dir->i_sb))
+ ((char *)de - bh->b_data))) {
- /* On error, skip the f_pos to the next block. */
- dir_file->f_pos = (dir_file->f_pos |
- (dir->i_sb->s_blocksize - 1)) + 1;
- brelse(bh);
- return count;
+ /* silently ignore the rest of the block */
+ break;
}
ext4fs_dirhash(de->name, de->name_len, hinfo);
if ((hinfo->hash < start_hash) ||
--
1.8.1.2
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