linux-kernel - Re: [PATCH v9 1/1] efi: a misc char interface for user to update efi firmware

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: <20151101105801.GB12711@pd.tnic>
Date:	Sun, 1 Nov 2015 11:58:01 +0100
From:	Borislav Petkov <bp@...en8.de>
To:	"Kweh, Hock Leong" <hock.leong.kweh@...el.com>
Cc:	Matt Fleming <matt@...sole-pimps.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Ong, Boon Leong" <boon.leong.ong@...el.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"linux-efi@...r.kernel.org" <linux-efi@...r.kernel.org>,
	Sam Protsenko <semen.protsenko@...aro.org>,
	Peter Jones <pjones@...hat.com>,
	Andy Lutomirski <luto@...capital.net>,
	Roy Franz <roy.franz@...aro.org>,
	James Bottomley <James.Bottomley@...senpartnership.com>,
	Linux FS Devel <linux-fsdevel@...r.kernel.org>,
	"Fleming, Matt" <matt.fleming@...el.com>,
	"Anvin, H Peter" <h.peter.anvin@...el.com>
Subject: Re: [PATCH v9 1/1] efi: a misc char interface for user to update efi
 firmware

On Sun, Nov 01, 2015 at 10:52:52AM +0000, Kweh, Hock Leong wrote:
> Could you share me your dumb file? I did perform negative test, but I did
> not get these dump stack in dmesg. Thanks.

I think almost any file works:

cat /bin/ls > /dev/efi_capsule_loader

> > > +#define UPLOAD_DONE -1
> > 
> > Isn't the fact that upload was finished a success message? If so, why is it a
> > negative value?
> 
> This is to indicate an upload is done and pending for close(2). If a subsequence
> write(2) perform, return error. Comments inputted by Matt and Andy.

But in that case you can return ERR_OCCURRED. UPLOAD_DONE still doesn't
look like a negative value to me as it signals that the upload was done
and thus successful as no errors happened during the upload.

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/