linux-kernel - dma_zalloc_coherent broken with 57bf5a8963f80fb3828c46c3e3a5b2dd790e09a7

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-next>] [day] [month] [year] [list]

Message-Id: <alpine.LFD.2.21.1803270944490.1726@schleppi>
Date:   Tue, 27 Mar 2018 10:12:54 +0200 (CEST)
From:   Sebastian Ott <sebott@...ux.vnet.ibm.com>
To:     Christoph Hellwig <hch@....de>,
        Jesper Nilsson <jesper.nilsson@...s.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
cc:     linux-kernel@...r.kernel.org
Subject: dma_zalloc_coherent broken with
 57bf5a8963f80fb3828c46c3e3a5b2dd790e09a7

Hi,

commit 57bf5a8963f80fb3828c46c3e3a5b2dd790e09a7 broke usage of dma
allocations specifying __GFP_ZERO by silently removing that flag.

Why should "the memory returned [] always be zeroed."?

Regards,
Sebastian