linux-kernel - Re: linux-6.19-rc4/kernel/kexec_core.c:425: Possible loss of data ?

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] [day] [month] [year] [list]

Message-ID:
 <VI1PR02MB39527C39DB659394AD837E679C85A@VI1PR02MB3952.eurprd02.prod.outlook.com>
Date: Thu, 8 Jan 2026 08:42:43 +0000
From: David Binderman <dcb314@...mail.com>
To: "bhe@...hat.com" <bhe@...hat.com>
CC: "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"kexec@...ts.infradead.org" <kexec@...ts.infradead.org>, LKML
	<linux-kernel@...r.kernel.org>
Subject: Re: linux-6.19-rc4/kernel/kexec_core.c:425: Possible loss of data ?

Hello there,

>We may not need to worry about it. In all places where
>kimage_alloc_control_pages is called, the order is 0 or
>get_order(KEXEC_CONTROL_PAGE_SIZE) on mips which is 2.

Thanks for the update.

>That is fine if people is worried, a patch is welcome.

Since my kernel patch success rate is 0.0 % (approx) I will avoid doing this.
Might be worth an assert that the value is in range [0..30].

Regards

David Binderman