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| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-03-07 23:07:10 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-16 08:42:58 -0700 |
| commit | a29fe6f3c9c25c0cf3d190e0c0667da3ef4ca611 (patch) | |
| tree | e2e2edaf2b6f656097b7763319a5b77f15ab192e | |
| parent | 782cfeb248a789e4ee9d9bcea1211e718df76f3b (diff) | |
| download | linux-stable-a29fe6f3c9c25c0cf3d190e0c0667da3ef4ca611.tar.gz linux-stable-a29fe6f3c9c25c0cf3d190e0c0667da3ef4ca611.tar.bz2 linux-stable-a29fe6f3c9c25c0cf3d190e0c0667da3ef4ca611.zip | |
jffs2: reduce the breakage on recovery from halfway failed rename()
commit f93812846f31381d35c04c6c577d724254355e7f upstream.
d_instantiate(new_dentry, old_inode) is absolutely wrong thing to
do - it will oops if new_dentry used to be positive, for starters.
What we need is d_invalidate() the target and be done with that.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | fs/jffs2/dir.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c index d211b8e18566..30c4c9ebb693 100644 --- a/fs/jffs2/dir.c +++ b/fs/jffs2/dir.c @@ -843,9 +843,14 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry, pr_notice("%s(): Link succeeded, unlink failed (err %d). You now have a hard link\n", __func__, ret); - /* Might as well let the VFS know */ - d_instantiate(new_dentry, d_inode(old_dentry)); - ihold(d_inode(old_dentry)); + /* + * We can't keep the target in dcache after that. + * For one thing, we can't afford dentry aliases for directories. + * For another, if there was a victim, we _can't_ set new inode + * for that sucker and we have to trigger mount eviction - the + * caller won't do it on its own since we are returning an error. + */ + d_invalidate(new_dentry); new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now); return ret; } |