linux-kernel - [PATCH] x86, relocs: move __vvar_page from S_ABS to S

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Message-ID: <20130611185652.GA23674@www.outflux.net>
Date:	Tue, 11 Jun 2013 11:56:52 -0700
From:	Kees Cook <keescook@...omium.org>
To:	linux-kernel@...r.kernel.org
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, x86@...nel.org,
	Kees Cook <keescook@...omium.org>,
	Cong Ding <dinggnu@...il.com>, Michael Davidson <md@...gle.com>
Subject: [PATCH] x86, relocs: move __vvar_page from S_ABS to S_REL

The __vvar_page relocation should actually be listed in S_REL instead
of S_ABS. Oddly, this didn't always cause things to break.

Signed-off-by: Kees Cook <keescook@...omium.org>
Reported-by: Michael Davidson <md@...gle.com>
---
 arch/x86/tools/relocs.c |    4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
index 590be10..f7bab68 100644
--- a/arch/x86/tools/relocs.c
+++ b/arch/x86/tools/relocs.c
@@ -42,9 +42,6 @@ static const char * const sym_regex_kernel[S_NSYMTYPES] = {
 	"^(xen_irq_disable_direct_reloc$|"
 	"xen_save_fl_direct_reloc$|"
 	"VDSO|"
-#if ELF_BITS == 64
-	"__vvar_page|"
-#endif
 	"__crc_)",
 
 /*
@@ -72,6 +69,7 @@ static const char * const sym_regex_kernel[S_NSYMTYPES] = {
 	"__per_cpu_load|"
 	"init_per_cpu__.*|"
 	"__end_rodata_hpage_align|"
+	"__vvar_page|"
 #endif
 	"_end)$"
 };
-- 
1.7.9.5


-- 
Kees Cook
Chrome OS Security
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