Re: [PATCH 2/2] ARM: zynq: Use memcpy_toio instead of memcpy on smp bring-up

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>