From: Lecopzer Chen <lecopzer.chen@mediatek.com> To: <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <kasan-dev@googlegroups.com>, <catalin.marinas@arm.com>, <will@kernel.org> Cc: <ryabinin.a.a@gmail.com>, <glider@google.com>, <andreyknvl@gmail.com>, <dvyukov@google.com>, <akpm@linux-foundation.org>, <tyhicks@linux.microsoft.com>, <maz@kernel.org>, <rppt@kernel.org>, <linux@roeck-us.net>, <gustavoars@kernel.org>, <yj.chiang@mediatek.com>, Lecopzer Chen <lecopzer.chen@mediatek.com> Subject: [PATCH v4 5/5] arm64: Kconfig: select KASAN_VMALLOC if KANSAN_GENERIC is enabled Date: Wed, 24 Mar 2021 12:05:22 +0800 [thread overview] Message-ID: <20210324040522.15548-6-lecopzer.chen@mediatek.com> (raw) In-Reply-To: <20210324040522.15548-1-lecopzer.chen@mediatek.com> Before this patch, someone who wants to use VMAP_STACK when KASAN_GENERIC enabled must explicitly select KASAN_VMALLOC. From Will's suggestion [1]: > I would _really_ like to move to VMAP stack unconditionally, and > that would effectively force KASAN_VMALLOC to be set if KASAN is in use Because VMAP_STACK now depends on either HW_TAGS or KASAN_VMALLOC if KASAN enabled, in order to make VMAP_STACK selected unconditionally, we bind KANSAN_GENERIC and KASAN_VMALLOC together. Note that SW_TAGS supports neither VMAP_STACK nor KASAN_VMALLOC now, so this is the first step to make VMAP_STACK selected unconditionally. Bind KANSAN_GENERIC and KASAN_VMALLOC together is supposed to cost more memory at runtime, thus the alternative is using SW_TAGS KASAN instead. [1]: https://lore.kernel.org/lkml/20210204150100.GE20815@willie-the-truck/ Suggested-by: Will Deacon <will@kernel.org> Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com> --- arch/arm64/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 3e54fa938234..07762359d741 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -195,6 +195,7 @@ config ARM64 select IOMMU_DMA if IOMMU_SUPPORT select IRQ_DOMAIN select IRQ_FORCED_THREADING + select KASAN_VMALLOC if KASAN_GENERIC select MODULES_USE_ELF_RELA select NEED_DMA_MAP_STATE select NEED_SG_DMA_LENGTH -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Lecopzer Chen <lecopzer.chen@mediatek.com> To: <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <kasan-dev@googlegroups.com>, <catalin.marinas@arm.com>, <will@kernel.org> Cc: <ryabinin.a.a@gmail.com>, <glider@google.com>, <andreyknvl@gmail.com>, <dvyukov@google.com>, <akpm@linux-foundation.org>, <tyhicks@linux.microsoft.com>, <maz@kernel.org>, <rppt@kernel.org>, <linux@roeck-us.net>, <gustavoars@kernel.org>, <yj.chiang@mediatek.com>, Lecopzer Chen <lecopzer.chen@mediatek.com> Subject: [PATCH v4 5/5] arm64: Kconfig: select KASAN_VMALLOC if KANSAN_GENERIC is enabled Date: Wed, 24 Mar 2021 12:05:22 +0800 [thread overview] Message-ID: <20210324040522.15548-6-lecopzer.chen@mediatek.com> (raw) In-Reply-To: <20210324040522.15548-1-lecopzer.chen@mediatek.com> Before this patch, someone who wants to use VMAP_STACK when KASAN_GENERIC enabled must explicitly select KASAN_VMALLOC. From Will's suggestion [1]: > I would _really_ like to move to VMAP stack unconditionally, and > that would effectively force KASAN_VMALLOC to be set if KASAN is in use Because VMAP_STACK now depends on either HW_TAGS or KASAN_VMALLOC if KASAN enabled, in order to make VMAP_STACK selected unconditionally, we bind KANSAN_GENERIC and KASAN_VMALLOC together. Note that SW_TAGS supports neither VMAP_STACK nor KASAN_VMALLOC now, so this is the first step to make VMAP_STACK selected unconditionally. Bind KANSAN_GENERIC and KASAN_VMALLOC together is supposed to cost more memory at runtime, thus the alternative is using SW_TAGS KASAN instead. [1]: https://lore.kernel.org/lkml/20210204150100.GE20815@willie-the-truck/ Suggested-by: Will Deacon <will@kernel.org> Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com> --- arch/arm64/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 3e54fa938234..07762359d741 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -195,6 +195,7 @@ config ARM64 select IOMMU_DMA if IOMMU_SUPPORT select IRQ_DOMAIN select IRQ_FORCED_THREADING + select KASAN_VMALLOC if KASAN_GENERIC select MODULES_USE_ELF_RELA select NEED_DMA_MAP_STATE select NEED_SG_DMA_LENGTH -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-03-24 4:06 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-03-24 4:05 [PATCH v4 0/5] arm64: kasan: support CONFIG_KASAN_VMALLOC Lecopzer Chen 2021-03-24 4:05 ` Lecopzer Chen 2021-03-24 4:05 ` [PATCH v4 1/5] arm64: kasan: don't populate vmalloc area for CONFIG_KASAN_VMALLOC Lecopzer Chen 2021-03-24 4:05 ` Lecopzer Chen 2021-03-24 4:05 ` [PATCH v4 2/5] arm64: kasan: abstract _text and _end to KERNEL_START/END Lecopzer Chen 2021-03-24 4:05 ` Lecopzer Chen 2021-03-24 4:05 ` [PATCH v4 3/5] arm64: Kconfig: support CONFIG_KASAN_VMALLOC Lecopzer Chen 2021-03-24 4:05 ` Lecopzer Chen 2021-03-24 4:05 ` [PATCH v4 4/5] arm64: kaslr: support randomized module area with KASAN_VMALLOC Lecopzer Chen 2021-03-24 4:05 ` Lecopzer Chen 2021-03-24 4:05 ` Lecopzer Chen [this message] 2021-03-24 4:05 ` [PATCH v4 5/5] arm64: Kconfig: select KASAN_VMALLOC if KANSAN_GENERIC is enabled Lecopzer Chen 2021-03-29 12:54 ` Will Deacon 2021-03-29 12:54 ` Will Deacon 2021-03-30 8:14 ` Lecopzer Chen 2021-03-30 8:14 ` Lecopzer Chen 2021-03-30 15:41 ` Andrey Konovalov 2021-03-30 15:41 ` Andrey Konovalov 2021-03-29 12:28 ` [PATCH v4 0/5] arm64: kasan: support CONFIG_KASAN_VMALLOC Catalin Marinas 2021-03-29 12:28 ` Catalin Marinas
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