[PATCH v5 0/2] arm: kasan: support CONFIG_KASAN_VMALLOC
From: Lecopzer Chen
Date: Wed Apr 27 2022 - 06:41:49 EST
Since the framework of KASAN_VMALLOC is well-developed,
It's easy to support for ARM that simply not to map shadow of VMALLOC
area on kasan_init.
Since the virtual address of vmalloc for Arm is also between
MODULE_VADDR and 0x100000000 (ZONE_HIGHMEM), which means the shadow
address has already included between KASAN_SHADOW_START and
Thus we need to change nothing for memory map of Arm.
This can fix ARM_MODULE_PLTS with KASan, support KASan for higmem
and support CONFIG_VMAP_STACK with KASan.
1. Qemu with memory 2G and vmalloc=500M for 3G/1G mapping.
2. Qemu with memory 2G and vmalloc=500M for 3G/1G mapping + LPAE.
3. Qemu with memory 2G and vmalloc=500M for 2G/2G mapping.
rebase on 5.18-rc4
rebase on 5.17-rc8.
remove simple doc for "arm: kasan: support CONFIG_KASAN_VMALLOC"
rewrite the description for VMAP_STACK
rebase on 5.17-rc5.
Add simple doc for "arm: kasan: support CONFIG_KASAN_VMALLOC"
Tweak commit message.
rebase on 5.17-rc3
Lecopzer Chen (2):
arm: kasan: support CONFIG_KASAN_VMALLOC
arm: kconfig: fix MODULE_PLTS for KASAN with KASAN_VMALLOC
arch/arm/Kconfig | 2 ++
arch/arm/mm/kasan_init.c | 6 +++++-
2 files changed, 7 insertions(+), 1 deletion(-)