Messages in this thread | | | From | Lecopzer Chen <> | Subject | [PATCH v5 0/2] arm: kasan: support CONFIG_KASAN_VMALLOC | Date | Wed, 27 Apr 2022 17:59:14 +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 support CONFIG_VMAP_STACK with KASan.
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.
v5: rebase on 5.18-rc4 v4: rebase on 5.17-rc8. remove simple doc for "arm: kasan: support CONFIG_KASAN_VMALLOC" rewrite the description for VMAP_STACK
https://lore.kernel.org/lkml/20220315090157.27001-1-lecopzer.chen@mediatek.com/
v3: rebase on 5.17-rc5. Add simple doc for "arm: kasan: support CONFIG_KASAN_VMALLOC" Tweak commit message.
https://lore.kernel.org/lkml/20220227134726.27584-1-lecopzer.chen@mediatek.com/
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/mm/kasan_init.c | 6 +++++- 2 files changed, 7 insertions(+), 1 deletion(-)
-- 2.18.0
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