linux-kernel - Re: [PATCH] csiostor: Avoid content leaks and casts

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Date:   Thu, 18 May 2017 21:35:27 -0400
From:   "Martin K. Petersen" <martin.petersen@...cle.com>
To:     Varun Prakash <varun@...lsio.com>
Cc:     linux-kernel@...r.kernel.org,
        "James E.J. Bottomley" <jejb@...ux.vnet.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, Daniel Micay <danielmicay@...il.com>,
        Kees Cook <keescook@...omium.org>
Subject: Re: [PATCH] csiostor: Avoid content leaks and casts


Varun,

You weren't CC:ed on this patch. Please review. Thanks!

> When copying attributes, the len argument was padded out and the
> resulting memcpy() would copy beyond the end of the source buffer.
> Avoid this, and use size_t for val_len to avoid all the
> casts. Similarly, avoid source buffer casts and use void *.
>
> Additionally enforces val_len can be represented by u16 and that the
> DMA buffer was not overflowed. Fixes the size of mfa, which is not
> FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN (but it will be padded up to
> 4). This was noticed by the future CONFIG_FORTIFY_SOURCE checks.

https://patchwork.kernel.org/patch/9718995/

-- 
Martin K. Petersen	Oracle Linux Engineering