From: Lecopzer Chen <lecopzer.chen@mediatek.com> To: <linux-kernel@vger.kernel.org> Cc: Russell King <linux@armlinux.org.uk>, Andrey Ryabinin <ryabinin.a.a@gmail.com>, Alexander Potapenko <glider@google.com>, "Andrey Konovalov" <andreyknvl@gmail.com>, Dmitry Vyukov <dvyukov@google.com>, Matthias Brugger <matthias.bgg@gmail.com>, Arnd Bergmann <arnd@arndb.de>, Linus Walleij <linus.walleij@linaro.org>, <rmk+kernel@armlinux.org.uk>, "Geert Uytterhoeven" <geert+renesas@glider.be>, Ard Biesheuvel <ardb@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Anshuman Khandual <anshuman.khandual@arm.com>, Lukas Bulwahn <lukas.bulwahn@gmail.com>, Masahiro Yamada <masahiroy@kernel.org>, <linux-arm-kernel@lists.infradead.org>, <kasan-dev@googlegroups.com>, <yj.chiang@mediatek.com>, Lecopzer Chen <lecopzer.chen@mediatek.com> Subject: [PATCH 1/2] arm: kasan: support CONFIG_KASAN_VMALLOC Date: Tue, 18 Jan 2022 17:44:49 +0800 [thread overview] Message-ID: <20220118094450.7730-2-lecopzer.chen@mediatek.com> (raw) In-Reply-To: <20220118094450.7730-1-lecopzer.chen@mediatek.com> Simply make shadow of vmalloc area mapped on demand. This can fix ARM_MODULE_PLTS with KASAN and provide first step to support CONFIG_VMAP_STACK in ARM. Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com> --- arch/arm/Kconfig | 1 + arch/arm/mm/kasan_init.c | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index fabe39169b12..f97f2c416be0 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -72,6 +72,7 @@ config ARM select HAVE_ARCH_KFENCE if MMU && !XIP_KERNEL select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU select HAVE_ARCH_KASAN if MMU && !XIP_KERNEL + select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN select HAVE_ARCH_MMAP_RND_BITS if MMU select HAVE_ARCH_PFN_VALID select HAVE_ARCH_SECCOMP diff --git a/arch/arm/mm/kasan_init.c b/arch/arm/mm/kasan_init.c index 5ad0d6c56d56..29caee9c79ce 100644 --- a/arch/arm/mm/kasan_init.c +++ b/arch/arm/mm/kasan_init.c @@ -236,7 +236,11 @@ void __init kasan_init(void) clear_pgds(KASAN_SHADOW_START, KASAN_SHADOW_END); - kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_START), + if (!IS_ENABLED(CONFIG_KASAN_VMALLOC)) + kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_START), + kasan_mem_to_shadow((void *)VMALLOC_END)); + + kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_END), kasan_mem_to_shadow((void *)-1UL) + 1); for_each_mem_range(i, &pa_start, &pa_end) { -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Lecopzer Chen <lecopzer.chen@mediatek.com> To: <linux-kernel@vger.kernel.org> Cc: Russell King <linux@armlinux.org.uk>, Andrey Ryabinin <ryabinin.a.a@gmail.com>, Alexander Potapenko <glider@google.com>, "Andrey Konovalov" <andreyknvl@gmail.com>, Dmitry Vyukov <dvyukov@google.com>, Matthias Brugger <matthias.bgg@gmail.com>, Arnd Bergmann <arnd@arndb.de>, Linus Walleij <linus.walleij@linaro.org>, <rmk+kernel@armlinux.org.uk>, "Geert Uytterhoeven" <geert+renesas@glider.be>, Ard Biesheuvel <ardb@kernel.org>, Mark Rutland <mark.rutland@arm.com>, Anshuman Khandual <anshuman.khandual@arm.com>, Lukas Bulwahn <lukas.bulwahn@gmail.com>, Masahiro Yamada <masahiroy@kernel.org>, <linux-arm-kernel@lists.infradead.org>, <kasan-dev@googlegroups.com>, <yj.chiang@mediatek.com>, Lecopzer Chen <lecopzer.chen@mediatek.com> Subject: [PATCH 1/2] arm: kasan: support CONFIG_KASAN_VMALLOC Date: Tue, 18 Jan 2022 17:44:49 +0800 [thread overview] Message-ID: <20220118094450.7730-2-lecopzer.chen@mediatek.com> (raw) In-Reply-To: <20220118094450.7730-1-lecopzer.chen@mediatek.com> Simply make shadow of vmalloc area mapped on demand. This can fix ARM_MODULE_PLTS with KASAN and provide first step to support CONFIG_VMAP_STACK in ARM. Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com> --- arch/arm/Kconfig | 1 + arch/arm/mm/kasan_init.c | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index fabe39169b12..f97f2c416be0 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -72,6 +72,7 @@ config ARM select HAVE_ARCH_KFENCE if MMU && !XIP_KERNEL select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU select HAVE_ARCH_KASAN if MMU && !XIP_KERNEL + select HAVE_ARCH_KASAN_VMALLOC if HAVE_ARCH_KASAN select HAVE_ARCH_MMAP_RND_BITS if MMU select HAVE_ARCH_PFN_VALID select HAVE_ARCH_SECCOMP diff --git a/arch/arm/mm/kasan_init.c b/arch/arm/mm/kasan_init.c index 5ad0d6c56d56..29caee9c79ce 100644 --- a/arch/arm/mm/kasan_init.c +++ b/arch/arm/mm/kasan_init.c @@ -236,7 +236,11 @@ void __init kasan_init(void) clear_pgds(KASAN_SHADOW_START, KASAN_SHADOW_END); - kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_START), + if (!IS_ENABLED(CONFIG_KASAN_VMALLOC)) + kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_START), + kasan_mem_to_shadow((void *)VMALLOC_END)); + + kasan_populate_early_shadow(kasan_mem_to_shadow((void *)VMALLOC_END), kasan_mem_to_shadow((void *)-1UL) + 1); for_each_mem_range(i, &pa_start, &pa_end) { -- 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:[~2022-01-18 9:45 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-18 9:44 [PATCH 0/2] arm: kasan: support CONFIG_KASAN_VMALLOC Lecopzer Chen 2022-01-18 9:44 ` Lecopzer Chen 2022-01-18 9:44 ` Lecopzer Chen [this message] 2022-01-18 9:44 ` [PATCH 1/2] " Lecopzer Chen 2022-01-18 9:44 ` [PATCH 2/2] arm: kconfig: fix MODULE_PLTS for KASAN with KASAN_VMALLOC Lecopzer Chen 2022-01-18 9:44 ` Lecopzer Chen 2022-05-06 6:01 [PATCH 1/2] ARM: kasan: Support CONFIG_KASAN_VMALLOC Alexander A Sverdlin 2022-05-06 6:01 ` Alexander A Sverdlin
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