linux-kernel - Re: [PATCH v1] dmaengine: imx-sdma: fix kernel hangs with SLUB slab allocator

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: <20191014080215.GL2654@vkoul-mobl>
Date:   Mon, 14 Oct 2019 13:32:15 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Robin Gong <yibin.gong@....com>
Cc:     "dan.j.williams@...el.com" <dan.j.williams@...el.com>,
        "shawnguo@...nel.org" <shawnguo@...nel.org>,
        "s.hauer@...gutronix.de" <s.hauer@...gutronix.de>,
        "festevam@...il.com" <festevam@...il.com>,
        "J.Lambrecht@...EVIC.com" <J.Lambrecht@...evic.com>,
        "kernel@...gutronix.de" <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1] dmaengine: imx-sdma: fix kernel hangs with SLUB slab
 allocator

On 24-09-19, 09:49, Robin Gong wrote:
> Illegal memory will be touch if SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3
> (41) exceed the size of structure sdma_script_start_addrs(40),
> thus cause memory corrupt such as slob block header so that kernel
> trap into while() loop forever in slob_free(). Please refer to below
> code piece in imx-sdma.c:
> for (i = 0; i < sdma->script_number; i++)
> 	if (addr_arr[i] > 0)
> 		saddr_arr[i] = addr_arr[i]; /* memory corrupt here */
> That issue was brought by commit a572460be9cf ("dmaengine: imx-sdma: Add
> support for version 3 firmware") because SDMA_SCRIPT_ADDRS_ARRAY_SIZE_V3
> (38->41 3 scripts added) not align with script number added in
> sdma_script_start_addrs(2 scripts).

Applied, thanks

-- 
~Vinod