linux-kernel - Re: [PATCH 07/13] kexec: Implementation of new syscall kexec_file

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Date:	Tue, 17 Jun 2014 00:10:59 +0200
From:	Borislav Petkov <bp@...en8.de>
To:	Vivek Goyal <vgoyal@...hat.com>
Cc:	"H. Peter Anvin" <hpa@...or.com>, WANG Chao <chaowang@...hat.com>,
	Dave Young <dyoung@...hat.com>, mjg59@...f.ucam.org,
	bhe@...hat.com, jkosina@...e.cz, greg@...ah.com,
	kexec@...ts.infradead.org, linux-kernel@...r.kernel.org,
	ebiederm@...ssion.com, akpm@...ux-foundation.org
Subject: Re: [PATCH 07/13] kexec: Implementation of new syscall
 kexec_file_load

On Mon, Jun 16, 2014 at 05:43:13PM -0400, Vivek Goyal wrote:
> Actually currently I am using vzalloc() for command line buffer
> allocation.
> 
> 	image->cmdline_buf = vzalloc(cmdline_len);
> 	if (!image->cmdline_buf)
> 		goto out;
> 
> Should I switch to using kzalloc() instead?

Well, vzalloc could trigger the OOM killer, can't it, for the right
size? If so, then we will have a serious problem.

And this snippet above is down the syscall path.

-- 
Regards/Gruss,
    Boris.

Sent from a fat crate under my desk. Formatting is fine.
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