On 06. 08. 19 5:07, 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(-)
diff --git a/arch/arm/mach-zynq/platsmp.c b/arch/arm/mach-zynq/platsmp.c index 38728badabd4..a10085be9073 100644 --- a/arch/arm/mach-zynq/platsmp.c +++ b/arch/arm/mach-zynq/platsmp.c @@ -57,7 +57,7 @@ int zynq_cpun_start(u32 address, int cpu) * 0x4: Jump by mov instruction * 0x8: Jumping address */
memcpy((__force void *)zero, &zynq_secondary_trampoline,
memcpy_toio(zero, &zynq_secondary_trampoline, trampoline_size); writel(address, zero + trampoline_size);
I would consider this one as stable material. Please also add there link to the patch which this patch fixes.
M