linux-kernel - Re: [PATCH] thunderbolt: Check for null pointer after calling kmemdup in icm_handle

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Message-ID: <YdVwQvoadUC22CVb@lahna>
Date:   Wed, 5 Jan 2022 12:17:38 +0200
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Jiasheng Jiang <jiasheng@...as.ac.cn>
Cc:     andreas.noever@...il.com, michael.jamet@...el.com,
        YehezkelShB@...il.com, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] thunderbolt: Check for null pointer after calling
 kmemdup in icm_handle_event

Hi,

On Wed, Jan 05, 2022 at 04:26:34PM +0800, Jiasheng Jiang wrote:
> As the possible failure of the allocation, kmemdup() may return NULL
> pointer.
> Like alloc_switch(), it might be better to check it.
> Therefore, icm_handle_event() should also check the return value of
> kmemdup().
> If fails, just free 'n' and directly return is enough, same as the way
> to handle the failure of kmalloc().
> 
> Fixes: f67cf491175a ("thunderbolt: Add support for Internal Connection Manager (ICM)")
> Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>

Thanks for the patch but I realized that this has been fixed already:

https://git.kernel.org/pub/scm/linux/kernel/git/westeri/thunderbolt.git/commit/?h=next&id=3cc1c6de458e0e58c413c3c35802ca96e55bbdbe