On 2019/01/31 19:51, Greg KH wrote: > Can you test the patch below? You can ask syzbot to test the patch. But
> @@ -461,7 +463,7 @@ static struct rchan_buf *relay_open_buf(struct rchan > *chan, unsigned int cpu) > dentry = chan->cb->create_buf_file(NULL, NULL, > S_IRUSR, buf, > &chan->is_global); > - if (WARN_ON(dentry)) > + if (IS_ERR_OR_NULL(dentry)) > goto free_buf; are you trying to fix a different bug together that old code was by error bailing out when chan->cb->create_buf_file() returned a valid "struct dentry *" ? I don't know what WARN_ON() due to a valid "struct dentry *" means... > } > >
