linux-kernel - [PATCH] [49/50] x86_64: Initialize 64bit registers for a.out executables

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Message-Id: <20070921223250.0624313DCD@wotan.suse.de>
Date:	Sat, 22 Sep 2007 00:32:49 +0200 (CEST)
From:	Andi Kleen <ak@...e.de>
To:	patches@...-64.org, linux-kernel@...r.kernel.org
Subject: [PATCH] [49/50] x86_64: Initialize 64bit registers for a.out executables


Previously the data from before the exec was kept in there. Zero
them instead
Signed-off-by: Andi Kleen <ak@...e.de>

---
 arch/x86_64/ia32/ia32_aout.c |    2 ++
 1 file changed, 2 insertions(+)

Index: linux/arch/x86_64/ia32/ia32_aout.c
===================================================================
--- linux.orig/arch/x86_64/ia32/ia32_aout.c
+++ linux/arch/x86_64/ia32/ia32_aout.c
@@ -422,6 +422,8 @@ beyond_if:
 	(regs)->eflags = 0x200;
 	(regs)->cs = __USER32_CS;
 	(regs)->ss = __USER32_DS;
+	regs->r8 = regs->r9 = regs->r10 = regs->r11 =
+	regs->r12 = regs->r13 = regs->r14 = regs->r15 = 0;
 	set_fs(USER_DS);
 	if (unlikely(current->ptrace & PT_PTRACED)) {
 		if (current->ptrace & PT_TRACE_EXEC)
-
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