Commit f9381284 authored by Al Viro's avatar Al Viro

jffs2: reduce the breakage on recovery from halfway failed rename()

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.

Cc: stable@vger.kernel.org # v3.18+
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 803c0012
...@@ -843,9 +843,14 @@ static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry, ...@@ -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", pr_notice("%s(): Link succeeded, unlink failed (err %d). You now have a hard link\n",
__func__, ret); __func__, ret);
/* Might as well let the VFS know */ /*
d_instantiate(new_dentry, d_inode(old_dentry)); * We can't keep the target in dcache after that.
ihold(d_inode(old_dentry)); * 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); new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now);
return ret; return ret;
} }
......
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