[tip:x86/kaslr] x86, kaslr: Use char array to gain sizeof sanity

[tip-bot for Kees Cook]

Commit-ID:  327f7d72454aecdc7a4a1c847a291a3f224b730f
Gitweb:     http://git.kernel.org/tip/327f7d72454aecdc7a4a1c847a291a3f224b730f
Author:     Kees Cook <keescook@xxxxxxxxxxxx>
AuthorDate: Tue, 12 Nov 2013 08:56:07 -0800
Committer:  H. Peter Anvin <hpa@xxxxxxxxx>
CommitDate: Tue, 12 Nov 2013 08:58:35 -0800

x86, kaslr: Use char array to gain sizeof sanity

The build_str needs to be char [] not char * for the sizeof() to report
the string length.

Reported-by: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20131112165607.GA5921@xxxxxxxxxxxxxxx
Signed-off-by: H. Peter Anvin <hpa@xxxxxxxxx>
---
 arch/x86/boot/compressed/aslr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/boot/compressed/aslr.c b/arch/x86/boot/compressed/aslr.c
index 38a07cc..84be175 100644
--- a/arch/x86/boot/compressed/aslr.c
+++ b/arch/x86/boot/compressed/aslr.c
@@ -13,7 +13,7 @@
 #include <linux/version.h>
 
 /* Simplified build-specific string for starting entropy. */
-static const char *build_str = UTS_RELEASE " (" LINUX_COMPILE_BY "@"
+static const char build_str[] = UTS_RELEASE " (" LINUX_COMPILE_BY "@"
 		LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION;
 
 #define I8254_PORT_CONTROL	0x43
--
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