linux-kernel - Re: [PATCH 2/2] tracing: Add free_trace_iter

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20230715094201.34a41f17@rorschach.local.home>
Date:   Sat, 15 Jul 2023 09:42:01 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Zheng Yejian <zhengyejian1@...wei.com>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux Trace Kernel <linux-trace-kernel@...r.kernel.org>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH 2/2] tracing: Add free_trace_iter_content() helper
 function

On Sat, 15 Jul 2023 13:15:32 +0800
Zheng Yejian <zhengyejian1@...wei.com> wrote:

> > @@ -6709,7 +6723,12 @@ static int tracing_open_pipe(struct inode *inode, struct file *filp)
> >   	}
> >   
> >   	trace_seq_init(&iter->seq);
> > -	iter->trace = tr->current_trace;
> > +
> > +	iter->trace = kzalloc(sizeof(*iter->trace), GFP_KERNEL);
> > +	if (!iter->trace)
> > +		goto fail;  
> 
> Hi, Steve, 'ret' may need to be set before `goto fail`:
>    ret = -ENOMEM;
> 

As I mentioned to Masami, this hunk of the patch didn't belong.
Something got mixed up in the commit. This patch even depends on the
previous patch to remove the allocation completely.

-- Steve