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From: Greg KH on 30 Mar 2010 19:20
2.6.31-stable review patch. If anyone has any objections, please let us know.

------------------

From: Jiri Slaby <jslaby(a)suse.cz>

commit 318f6b228ba88a394ef560efc1bfe028ad5ae6b6 upstream.

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.

[ hpa: this is a regression from 2.6.22... time to kill a.out? ]

Signed-off-by: Jiri Slaby <jslaby(a)suse.cz>
LKML-Reference: <1265831716-7668-1-git-send-email-jslaby(a)suse.cz>
Cc: Ingo Molnar <mingo(a)elte.hu>
Cc: Thomas Gleixner <tglx(a)linutronix.de>
Cc: Ollie Wild <aaw(a)google.com>
Cc: x86(a)kernel.org
Signed-off-by: H. Peter Anvin <hpa(a)zytor.com>
Signed-off-by: Greg Kroah-Hartman <gregkh(a)suse.de>

---
arch/x86/ia32/ia32_aout.c | 1 -
1 file changed, 1 deletion(-)

--- 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
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;



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