Commit 95ad5c29 authored Mar 12, 2014 by J. Bruce Fields Committed by Al Viro Aug 07, 2014

dcache: d_splice_alias should detect loops



I believe this can only happen in the case of a corrupted filesystem.
So -EIO looks like the appropriate error.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

parent 96353895

fs/dcache.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -2706,6 +2706,11 @@ struct dentry d_splice_alias(struct inode inode, struct dentry *dentry)
		dput(new);
		return ERR_PTR(-EIO);
		}
		if (d_ancestor(new, dentry)) {
		spin_unlock(&inode->i_lock);
		dput(new);
		return ERR_PTR(-EIO);
		}
		write_seqlock(&rename_lock);
		__d_materialise_dentry(dentry, new);
		write_sequnlock(&rename_lock);