netdev - Re: [PATCH] net: seeq: Fix the function used to release some memory in an error handling path

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: <20190901.121109.1164811815017267709.davem@redhat.com>
Date:   Sun, 01 Sep 2019 12:11:09 -0700 (PDT)
From:   David Miller <davem@...hat.com>
To:     christophe.jaillet@...adoo.fr
Cc:     yuehaibing@...wei.com, tglx@...utronix.de,
        gregkh@...uxfoundation.org, tbogendoerfer@...e.de,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] net: seeq: Fix the function used to release some
 memory in an error handling path

From: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Date: Sat, 31 Aug 2019 09:17:51 +0200

> In commit 99cd149efe82 ("sgiseeq: replace use of dma_cache_wback_inv"),
> a call to 'get_zeroed_page()' has been turned into a call to
> 'dma_alloc_coherent()'. Only the remove function has been updated to turn
> the corresponding 'free_page()' into 'dma_free_attrs()'.
> The error hndling path of the probe function has not been updated.
> 
> Fix it now.
> 
> Rename the corresponding label to something more in line.
> 
> Fixes: 99cd149efe82 ("sgiseeq: replace use of dma_cache_wback_inv")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>

Applied.

> If 'dma_alloc_coherent()' fails, maybe the message in printk could be
> improved. The comment above may also not be relevant.

Memory allocation failures already give a stack backtrack down deep in the
memory allocators, therefore printing messages at allocation call sites
are veboten.