linux/arch/arm/mach-zynq
Luis Araneda b7005d4ef4 ARM: zynq: Use memcpy_toio instead of memcpy on smp bring-up
This fixes a kernel panic on memcpy when
FORTIFY_SOURCE is enabled.

The initial smp implementation on commit aa7eb2bb4e
("arm: zynq: Add smp support")
used memcpy, which worked fine until commit ee333554fe
("ARM: 8749/1: Kconfig: Add ARCH_HAS_FORTIFY_SOURCE")
enabled overflow checks at runtime, producing a read
overflow panic.

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.

Fixes: aa7eb2bb4e ("arm: zynq: Add smp support")
Signed-off-by: Luis Araneda <luaraneda@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2019-08-14 09:40:43 +02:00
..
Kconfig License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
common.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
common.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 2019-06-05 17:36:37 +02:00
headsmp.S ARM: zynq: Support smp in thumb mode 2019-08-14 09:40:35 +02:00
platsmp.c ARM: zynq: Use memcpy_toio instead of memcpy on smp bring-up 2019-08-14 09:40:43 +02:00
pm.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 13 2019-05-21 11:28:45 +02:00
slcr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 151 2019-05-30 11:26:28 -07:00