| Date | Fri, 6 Apr 2018 07:51:18 +0100 | From | Al Viro <> | Subject | Re: [PATCH 05/20] afs: Implement @sys substitution handling |
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On Thu, Apr 05, 2018 at 09:30:04PM +0100, David Howells wrote: > +static struct dentry *afs_lookup_atsys(struct inode *dir, struct dentry *dentry, > + struct key *key) > +{
> + ret = lookup_one_len(buf, parent, len);
Er... Parent is locked only shared here and lookup_one_len() seriously depends upon exclusive lock. As it is, race with lookup of the full name will mess the things up very badly.
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