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From: Greg KH <gregkh@linuxfoundation.org>
To: Luis Araneda <luaraneda@gmail.com>
Cc: linux@armlinux.org.uk, michal.simek@xilinx.com,
	stable@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2/2] ARM: zynq: Use memcpy_toio instead of memcpy on smp bring-up
Date: Tue, 6 Aug 2019 07:17:17 +0200	[thread overview]
Message-ID: <20190806051717.GC8525@kroah.com> (raw)
In-Reply-To: <20190806030718.29048-3-luaraneda@gmail.com>

On Mon, Aug 05, 2019 at 11:07:18PM -0400, Luis Araneda wrote:
> This fixes a kernel panic (read overflow) on memcpy when
> FORTIFY_SOURCE is enabled.
> 
> The computed size of memcpy args are:
> - p_size (dst): 4294967295 = (size_t) -1
> - q_size (src): 1
> - size (len): 8
> 
> Additionally, the memory is marked as __iomem, so one of
> the memcpy_* functions should be used for read/write
> 
> Signed-off-by: Luis Araneda <luaraneda@gmail.com>
> ---
>  arch/arm/mach-zynq/platsmp.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>

  reply	other threads:[~2019-08-06  5:17 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-08-06  3:07 [PATCH 0/2] ARM: zynq: smp improvements Luis Araneda
2019-08-06  3:07 ` [PATCH 1/2] ARM: zynq: support smp in thumb mode Luis Araneda
2019-08-06  5:17   ` Greg KH
2019-08-06  6:39   ` Michal Simek
2019-08-06 12:40     ` Luis Araneda
2019-08-08  9:18       ` Michal Simek
2019-08-06  3:07 ` [PATCH 2/2] ARM: zynq: Use memcpy_toio instead of memcpy on smp bring-up Luis Araneda
2019-08-06  5:17   ` Greg KH [this message]
2019-08-06  6:41   ` Michal Simek
2019-08-06 12:49     ` Luis Araneda
2019-08-08  9:19       ` Michal Simek
2019-08-06  5:17 ` [PATCH 0/2] ARM: zynq: smp improvements Greg KH

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