Messages in this thread |  | | From | Lecopzer Chen <> | Subject | [PATCH v3 0/2] arm: kasan: support CONFIG_KASAN_VMALLOC | Date | Sun, 27 Feb 2022 21:47:24 +0800 |
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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 KASAN_SHADOW_END. Thus we need to change nothing for memory map of Arm.
This can fix ARM_MODULE_PLTS with KASan, support KASan for higmem and provide the first step to support CONFIG_VMAP_STACK with Arm.
Test on 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.
v3: rebase on 5.17-rc5. Add simple doc for "arm: kasan: support CONFIG_KASAN_VMALLOC" Tweak commit message.
v2: 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/include/asm/kasan_def.h | 11 ++++++++++- arch/arm/mm/kasan_init.c | 6 +++++- 3 files changed, 17 insertions(+), 2 deletions(-)
-- 2.25.1
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