linux/arch/openrisc
Stafford Horne 3fe164e719 openrisc: fix SMP tlb flush NULL pointer dereference
[ Upstream commit 27dff9a9c2 ]

Throughout the OpenRISC kernel port VMA is passed as NULL when flushing
kernel tlb entries.  Somehow this was missed when I was testing
c28b27416d ("openrisc: Implement proper SMP tlb flushing") and now the
SMP kernel fails to completely boot.

In OpenRISC VMA is used only to determine which cores need to have their
TLB entries flushed.

This patch updates the logic to flush tlbs on all cores when the VMA is
passed as NULL.  Also, we update places VMA is passed as NULL to use
flush_tlb_kernel_range instead.  Now, the only place VMA is passed as
NULL is in the implementation of flush_tlb_kernel_range.

Fixes: c28b27416d ("openrisc: Implement proper SMP tlb flushing")
Reported-by: Jan Henrik Weinstock <jan.weinstock@rwth-aachen.de>
Signed-off-by: Stafford Horne <shorne@gmail.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-11-18 14:04:25 +01:00
..
boot/dts or1k: dts: Add ethoc device to SMP devicetree 2019-08-31 11:56:19 +09:00
configs openrisc: configs: Cleanup CONFIG_CROSS_COMPILE 2020-01-31 22:10:58 +09:00
include openrisc: Define memory barrier mb 2021-06-03 09:00:44 +02:00
kernel openrisc: fix SMP tlb flush NULL pointer dereference 2021-11-18 14:04:25 +01:00
lib treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mm openrisc: mm/init.c: remove unused memblock_region variable in map_ram() 2021-05-26 12:06:57 +02:00
Kconfig uaccess: add infrastructure for kernel builds with set_fs() 2020-09-08 22:21:32 -04:00
Kconfig.debug treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
Makefile openrisc: remove unneeded code in arch/openrisc/Makefile 2019-01-17 23:42:59 +09:00