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From: Steven Rostedt <rostedt@goodmis.org>
To: Tomas Bortoli <tomasbortoli@gmail.com>
Cc: mingo@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] trace: Avoid memory leak in predicate_parse()
Date: Tue, 28 May 2019 11:29:56 -0400	[thread overview]
Message-ID: <20190528112956.4cf2dd9c@gandalf.local.home> (raw)
In-Reply-To: <1a9137e1-bcc3-787f-267c-8b76dea41fbb@gmail.com>

On Tue, 28 May 2019 17:18:59 +0200
Tomas Bortoli <tomasbortoli@gmail.com> wrote:

> >> +	memset(prog_stack, 0, nr_preds * sizeof(*prog_stack));
> >> +  
> > 
> > Can you instead just switch the allocation of prog_stack to use
> > kcalloc()?  
> 
> kmalloc_array() is safe against arithmetic overflow of the arguments.
> Using kcalloc() directly we wouldn't check for that. Not really ideal in
> my opinion. And there's no kcalloc_array() apparently!

But doesn't kcalloc() simply call kmalloc_array() with the GFP_ZERO
flag?

-- Steve

  reply	other threads:[~2019-05-28 15:30 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-28 13:46 Tomas Bortoli
2019-05-28 14:44 ` Steven Rostedt
2019-05-28 15:18   ` Tomas Bortoli
2019-05-28 15:29     ` Steven Rostedt [this message]
2019-05-28 15:32       ` Tomas Bortoli
2019-05-28 15:43   ` Tomas Bortoli
2019-05-28 15:48     ` Steven Rostedt
2019-05-28 15:55       ` Tomas Bortoli
2019-05-28 20:31     ` Steven Rostedt
2019-05-28 20:48       ` Tomas Bortoli

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