* [tip: x86/build] x86/vmlinux: Move EXCEPTION_TABLE to RO_DATA segment
[not found] <20191029211351.13243-17-keescook@chromium.org>
@ 2019-11-05 9:27 ` tip-bot2 for Kees Cook
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From: tip-bot2 for Kees Cook @ 2019-11-05 9:27 UTC (permalink / raw)
To: linux-tip-commits
Cc: Kees Cook, Borislav Petkov, Andy Lutomirski, Arnd Bergmann,
Dave Hansen, Heiko Carstens, H. Peter Anvin, Ingo Molnar,
linux-alpha, linux-arch, linux-arm-kernel, linux-c6x-dev,
linux-ia64, linuxppc-dev, linux-s390, Michael Ellerman,
Michal Simek, Rick Edgecombe, Ross Zwisler, Segher Boessenkool,
Thomas Gleixner, Thomas Lendacky, Will Deacon, x86-ml,
Yoshinori Sato, Ingo Molnar, Borislav Petkov, linux-kernel
The following commit has been merged into the x86/build branch of tip:
Commit-ID: f0d7ee17d57c7a8510518a1e60366d053e2f3ff5
Gitweb: https://git.kernel.org/tip/f0d7ee17d57c7a8510518a1e60366d053e2f3ff5
Author: Kees Cook <keescook@chromium.org>
AuthorDate: Tue, 29 Oct 2019 14:13:38 -07:00
Committer: Borislav Petkov <bp@suse.de>
CommitterDate: Mon, 04 Nov 2019 17:55:02 +01:00
x86/vmlinux: Move EXCEPTION_TABLE to RO_DATA segment
The exception table was needlessly marked executable. In preparation
for execute-only memory, move the table into the RO_DATA segment via
the new macro that can be used by any architectures that want to make
a similar consolidation.
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-alpha@vger.kernel.org
Cc: linux-arch@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-ia64@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: Ross Zwisler <zwisler@chromium.org>
Cc: Segher Boessenkool <segher@kernel.crashing.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Lendacky <Thomas.Lendacky@amd.com>
Cc: Will Deacon <will@kernel.org>
Cc: x86-ml <x86@kernel.org>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Link: https://lkml.kernel.org/r/20191029211351.13243-17-keescook@chromium.org
---
arch/x86/kernel/vmlinux.lds.S | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S
index a1a758e..b06d6e1 100644
--- a/arch/x86/kernel/vmlinux.lds.S
+++ b/arch/x86/kernel/vmlinux.lds.S
@@ -22,6 +22,7 @@
#endif
#define EMITS_PT_NOTE
+#define RO_EXCEPTION_TABLE_ALIGN 16
#include <asm-generic/vmlinux.lds.h>
#include <asm/asm-offsets.h>
@@ -145,8 +146,6 @@ SECTIONS
#endif
} :text = 0x9090
- EXCEPTION_TABLE(16)
-
/* End of text section, which should occupy whole number of pages */
_etext = .;
. = ALIGN(PAGE_SIZE);
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2019-11-05 9:27 ` [tip: x86/build] x86/vmlinux: Move EXCEPTION_TABLE to RO_DATA segment tip-bot2 for Kees Cook
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