linux-kernel - [PATCH 1/1] x86: ia32_aout, do not kill argument mapping

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Message-Id: <1264236951-16459-1-git-send-email-jslaby@suse.cz>
Date:	Sat, 23 Jan 2010 09:55:51 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	mingo@...e.hu
Cc:	linux-kernel@...r.kernel.org, jirislaby@...il.com,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>, Ollie Wild <aaw@...gle.com>,
	x86@...nel.org
Subject: [PATCH 1/1] x86: ia32_aout, do not kill argument mapping

Do not set current->mm->mmap to NULL in 32-bit emulation on 64-bit
load_aout_binary after flush_old_exec as it would destroy already
set brpm mapping with arguments.

Introduced by b6a2fea39318e43fee84fa7b0b90d68bed92d2ba
mm: variable length argument support
where the argument mapping in bprm was added.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Ollie Wild <aaw@...gle.com>
Cc: x86@...nel.org
---
 arch/x86/ia32/ia32_aout.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/arch/x86/ia32/ia32_aout.c b/arch/x86/ia32/ia32_aout.c
index 2a4d073..652e80f 100644
--- a/arch/x86/ia32/ia32_aout.c
+++ b/arch/x86/ia32/ia32_aout.c
@@ -326,7 +326,6 @@ static int load_aout_binary(struct linux_binprm *bprm, struct pt_regs *regs)
 	current->mm->free_area_cache = TASK_UNMAPPED_BASE;
 	current->mm->cached_hole_size = 0;
 
-	current->mm->mmap = NULL;
 	install_exec_creds(bprm);
 	current->flags &= ~PF_FORKNOEXEC;
 
-- 
1.6.5.7

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