From: Mark Brown <broonie@kernel.org>
To: Vincenzo Frascino <Vincenzo.Frascino@arm.com>,
Will Deacon <will@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>
Cc: Mark Brown <broonie@kernel.org>,
Kees Cook <keescook@chromium.org>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH 05/10] arm64: mm: Mark module text as guarded pages
Date: Wed, 15 Apr 2020 14:07:44 +0100 [thread overview]
Message-ID: <20200415130750.18645-6-broonie@kernel.org> (raw)
In-Reply-To: <20200415130750.18645-1-broonie@kernel.org>
When the kernel is built for BTI and running on a system which supports
it extend guard page coverage to include executable code from loadable
modules.
Signed-off-by: Mark Brown <broonie@kernel.org>
---
arch/arm64/mm/pageattr.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/mm/pageattr.c b/arch/arm64/mm/pageattr.c
index 250c49008d73..bde08090b838 100644
--- a/arch/arm64/mm/pageattr.c
+++ b/arch/arm64/mm/pageattr.c
@@ -126,13 +126,13 @@ int set_memory_nx(unsigned long addr, int numpages)
{
return change_memory_common(addr, numpages,
__pgprot(PTE_PXN),
- __pgprot(0));
+ __pgprot(PTE_MAYBE_GP));
}
int set_memory_x(unsigned long addr, int numpages)
{
return change_memory_common(addr, numpages,
- __pgprot(0),
+ __pgprot(PTE_MAYBE_GP),
__pgprot(PTE_PXN));
}
--
2.20.1
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next prev parent reply other threads:[~2020-04-15 13:13 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-15 13:07 [PATCH 00/10] arm64: BTI kernel and vDSO support Mark Brown
2020-04-15 13:07 ` [PATCH 01/10] arm64: kernel: Convert to modern annotations for assembly functions Mark Brown
2020-04-15 13:07 ` [PATCH 02/10] arm64: bti: Support building kernel C code using BTI Mark Brown
2020-04-15 13:07 ` [PATCH 03/10] arm64: asm: Override SYM_FUNC_START when building the kernel with BTI Mark Brown
2020-04-15 13:07 ` [PATCH 04/10] arm64: Set GP bit in kernel page tables to enable BTI for the kernel Mark Brown
2020-04-28 17:24 ` Catalin Marinas
2020-04-28 18:03 ` Mark Brown
2020-04-29 7:40 ` Will Deacon
2020-04-29 10:10 ` Mark Brown
2020-04-15 13:07 ` Mark Brown [this message]
2020-04-27 15:07 ` [PATCH 05/10] arm64: mm: Mark module text as guarded pages Mark Brown
2020-04-15 13:07 ` [PATCH 06/10] arm64: bti: Provide Kconfig for kernel mode BTI Mark Brown
2020-04-15 13:07 ` [PATCH 07/10] arm64: asm: Provide a mechanism for generating ELF note for BTI Mark Brown
2020-04-15 13:07 ` [PATCH 08/10] arm64: vdso: Annotate " Mark Brown
2020-04-15 13:07 ` [PATCH 09/10] arm64: vdso: Force the vDSO to be linked as BTI when built " Mark Brown
2020-04-15 13:07 ` [PATCH 10/10] arm64: vdso: Map the vDSO text with guarded pages " Mark Brown
2020-04-15 13:07 ` [PATCH 10/10] arm64: vdso: Map the VDSO " Mark Brown
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