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: Kees Cook <keescook@chromium.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Jean-Philippe Brucker <jean-philippe.brucker@arm.com>,
Mark Brown <broonie@kernel.org>,
Amit Kachhap <amit.kachhap@arm.com>,
Dave Martin <Dave.Martin@arm.com>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 06/11] arm64: mm: Mark executable text as guarded pages
Date: Wed, 6 May 2020 20:51:33 +0100 [thread overview]
Message-ID: <20200506195138.22086-7-broonie@kernel.org> (raw)
In-Reply-To: <20200506195138.22086-1-broonie@kernel.org>
When the kernel is built for BTI and running on a system which supports
make all executable text guarded pages to ensure that loadable module
and JITed BPF code is protected by BTI.
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
---
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:[~2020-05-06 19:53 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-06 19:51 [PATCH v3 00/11] arm64: BTI kernel and vDSO support Mark Brown
2020-05-06 19:51 ` [PATCH v3 01/11] arm64: Document why we enable PAC support for leaf functions Mark Brown
2020-05-06 19:51 ` [PATCH v3 02/11] arm64: bti: Support building kernel C code using BTI Mark Brown
2020-05-06 19:51 ` [PATCH v3 03/11] arm64: asm: Override SYM_FUNC_START when building the kernel with BTI Mark Brown
2020-05-06 19:51 ` [PATCH v3 04/11] arm64: Set GP bit in kernel page tables to enable BTI for the kernel Mark Brown
2020-05-06 19:51 ` [PATCH v3 05/11] arm64: bpf: Annotate JITed code for BTI Mark Brown
2020-05-07 20:15 ` Daniel Borkmann
2020-05-06 19:51 ` Mark Brown [this message]
2020-05-06 19:51 ` [PATCH v3 07/11] arm64: bti: Provide Kconfig for kernel mode BTI Mark Brown
2020-05-06 19:51 ` [PATCH v3 08/11] arm64: asm: Provide a mechanism for generating ELF note for BTI Mark Brown
2020-05-06 19:51 ` [PATCH v3 09/11] arm64: vdso: Annotate " Mark Brown
2020-05-06 19:51 ` [PATCH v3 10/11] arm64: vdso: Force the vDSO to be linked as BTI when built " Mark Brown
2020-05-06 19:51 ` [PATCH v3 11/11] arm64: vdso: Map the vDSO text with guarded pages " Mark Brown
2020-05-07 14:33 ` [PATCH v3 00/11] arm64: BTI kernel and vDSO support Will Deacon
2020-05-07 14:35 ` Will Deacon
2020-05-07 14:59 ` Will Deacon
2020-05-07 15:09 ` Mark Brown
2020-05-07 15:18 ` Will Deacon
2020-05-07 15:48 ` Mark Brown
2020-05-07 15:55 ` Will Deacon
2020-05-07 16:30 ` Mark Brown
2020-05-07 16:36 ` Will Deacon
2020-05-07 16:47 ` Mark Brown
2020-05-08 16:53 ` Mark Brown
2020-05-07 15:07 ` Mark Brown
2020-05-07 15:26 ` Will Deacon
2020-05-07 17:25 ` Will Deacon
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