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====================================================================
From 540e6a6c36e6372d4f99eeb4a50c8eaa6d7989b3 Mon Sep 17 00:00:00 2001
From: Han Dapeng <[email protected]>
Date: Fri, 16 Apr 2021 10:36:38 +0800
Subject: [PATCH] symbol : Make the size of the compile-related array fixed
For the same code, the machine's user name, hostname, or compilation time
may cause the kernel symbol address to be inconsistent, which is not
friendly to some symbol-dependent software, such as Crash.
Signed-off-by: Han Dapeng <[email protected]>
---
arch/powerpc/mm/nohash/kaslr_booke.c | 2 +-
arch/s390/boot/version.c | 2 +-
arch/x86/boot/compressed/kaslr.c | 2 +-
arch/x86/boot/version.c | 2 +-
init/version.c | 4 ++--
scripts/mkcompile_h | 2 ++
6 files changed, 8 insertions(+), 6 deletions(-)
diff --git a/arch/powerpc/mm/nohash/kaslr_booke.c b/arch/powerpc/mm/nohash/kaslr_booke.c
index 4c74e8a5482b..494ef408e60c 100644
--- a/arch/powerpc/mm/nohash/kaslr_booke.c
+++ b/arch/powerpc/mm/nohash/kaslr_booke.c
@@ -37,7 +37,7 @@ struct regions {
};
/* Simplified build-specific string for starting entropy. */
-static const char build_str[] = UTS_RELEASE " (" LINUX_COMPILE_BY "@"
+static const char build_str[COMPILE_STR_MAX] = UTS_RELEASE " (" LINUX_COMPILE_BY "@"
LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION;
struct regions __initdata regions;
diff --git a/arch/s390/boot/version.c b/arch/s390/boot/version.c
index d32e58bdda6a..627416a27d74 100644
--- a/arch/s390/boot/version.c
+++ b/arch/s390/boot/version.c
@@ -3,5 +3,5 @@
#include <generated/compile.h>
#include "boot.h"
-const char kernel_version[] = UTS_RELEASE
+const char kernel_version[COMPILE_STR_MAX] = UTS_RELEASE
" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ") " UTS_VERSION;
diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c
index b92fffbe761f..7b72b518a4c8 100644
--- a/arch/x86/boot/compressed/kaslr.c
+++ b/arch/x86/boot/compressed/kaslr.c
@@ -43,7 +43,7 @@
extern unsigned long get_cmd_line_ptr(void);
/* Simplified build-specific string for starting entropy. */
-static const char build_str[] = UTS_RELEASE " (" LINUX_COMPILE_BY "@"
+static const char build_str[COMPILE_STR_MAX] = UTS_RELEASE " (" LINUX_COMPILE_BY "@"
LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION;
static unsigned long rotate_xor(unsigned long hash, const void *area,
diff --git a/arch/x86/boot/version.c b/arch/x86/boot/version.c
index a1aaaf6c06a6..08feaa2d7a10 100644
--- a/arch/x86/boot/version.c
+++ b/arch/x86/boot/version.c
@@ -14,6 +14,6 @@
#include <generated/utsrelease.h>
#include <generated/compile.h>
-const char kernel_version[] =
+const char kernel_version[COMPILE_STR_MAX] =
UTS_RELEASE " (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ") "
UTS_VERSION;
diff --git a/init/version.c b/init/version.c
index 92afc782b043..adfc9e91b56b 100644
--- a/init/version.c
+++ b/init/version.c
@@ -35,11 +35,11 @@ struct uts_namespace init_uts_ns = {
EXPORT_SYMBOL_GPL(init_uts_ns);
/* FIXED STRINGS! Don't touch! */
-const char linux_banner[] =
+const char linux_banner[COMPILE_STR_MAX] =
"Linux version " UTS_RELEASE " (" LINUX_COMPILE_BY "@"
LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION "\n";
-const char linux_proc_banner[] =
+const char linux_proc_banner[COMPILE_STR_MAX] =
"%s version %s"
" (" LINUX_COMPILE_BY "@" LINUX_COMPILE_HOST ")"
" (" LINUX_COMPILER ") %s\n";
diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
index 4ae735039daf..02b9d9d54da9 100755
--- a/scripts/mkcompile_h
+++ b/scripts/mkcompile_h
@@ -65,6 +65,8 @@ UTS_VERSION="$(echo $UTS_VERSION $CONFIG_FLAGS $TIMESTAMP | cut -b -$UTS_LEN)"
LD_VERSION=$($LD -v | head -n1 | sed 's/(compatible with [^)]*)//' \
| sed 's/[[:space:]]*$//')
printf '#define LINUX_COMPILER "%s"\n' "$CC_VERSION, $LD_VERSION"
+
+ echo \#define COMPILE_STR_MAX 512
} > .tmpcompile
# Only replace the real compile.h if the new one is different,
--
2.27.0
=====================================================================================
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Our company encourages giving code back to the community, no problem, I will take responsibility for this.
Thank you!
-----邮件原件-----
发件人: Christophe Leroy <[email protected]>
发送时间: 2021年4月16日 14:13
收件人: 韩大鹏(Han Dapeng) <[email protected]>; Michael Ellerman <[email protected]>; Benjamin Herrenschmidt <[email protected]>; Paul Mackerras <[email protected]>; Heiko Carstens <[email protected]>; Vasily Gorbik <[email protected]>; Christian Borntraeger <[email protected]>; Thomas Gleixner <[email protected]>; Ingo Molnar <[email protected]>; Borislav Petkov <[email protected]>; [email protected]; H. Peter Anvin <[email protected]>; Masahiro Yamada <[email protected]>; Michal Marek <[email protected]>; Mike Rapoport <[email protected]>; Pekka Enberg <[email protected]>; Andrew Morton <[email protected]>; Arseny Solokha <[email protected]>; Arvind Sankar <[email protected]>; Kees Cook <[email protected]>; Joerg Roedel <[email protected]>; Christian Brauner <[email protected]>; Kirill Tkhai <[email protected]>; [email protected]; [email protected]; [email protected]; [email protected]
抄送: 陈安庆(Anqing) <[email protected]>
主题: Re: [PATCH] symbol : Make the size of the compile-related array fixed
Also, the following statement which appears at the end of your mail is puzzling. What can we do with your patch if there are such limitations ?
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Le 16/04/2021 à 08:08, Christophe Leroy a écrit :
> Hi,
>
> This mail is unreadable.
>
> Please send your patch as raw text mail, not as attached file.
>
> Thanks
> Christophe
>
> Le 16/04/2021 à 05:12, 韩大鹏(Han Dapeng) a écrit :
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