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Date: Sat, 16 Aug 2008 15:32:46 -0700
From: <gregkh@...e.de>
To: jdike@...toit.com, akpm@...ux-foundation.org, caker@...shore.net,
gregkh@...e.de, jdike@...ux.intel.com,
linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
user-mode-linux-devel@...ts.sourceforge.net,
xiyou.wangcong@...il.com
Cc: <stable@...nel.org>, <stable-commits@...r.kernel.org>
Subject: patch uml-physical-memory-shouldn-t-include-initial-stack.patch added to 2.6.25-stable tree
This is a note to let you know that we have just queued up the patch titled
Subject: uml: physical memory shouldn't include initial stack
to the 2.6.25-stable tree. Its filename is
uml-physical-memory-shouldn-t-include-initial-stack.patch
A git repo of this tree can be found at
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
>From stable-bounces@...ux.kernel.org Tue Aug 5 13:14:54 2008
From: Jeff Dike <jdike@...toit.com>
Date: Tue, 5 Aug 2008 16:14:04 -0400
Subject: uml: physical memory shouldn't include initial stack
To: stable@...nel.org
Cc: LKML <linux-kernel@...r.kernel.org>, uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Message-ID: <20080805201404.GA11782@...user-mode-linux.org>
Content-Disposition: inline
From: Jeff Dike <jdike@...toit.com>
commit 60a2988aea701a6424809a5432bf068667aac177 upstream
The top of physical memory should be below the initial process stack, not the
top of the address space, at least for as long as the stack isn't known to the
kernel VM system and appropriately reserved.
Cc: "Christopher S. Aker" <caker@...shore.net>
Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
Cc: WANG Cong <xiyou.wangcong@...il.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
arch/um/kernel/um_arch.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -259,6 +259,7 @@ int __init linux_main(int argc, char **a
unsigned long avail, diff;
unsigned long virtmem_size, max_physmem;
unsigned int i, add;
+ unsigned long stack;
char * mode;
for (i = 1; i < argc; i++) {
@@ -347,7 +348,9 @@ int __init linux_main(int argc, char **a
}
virtmem_size = physmem_size;
- avail = TASK_SIZE - start_vm;
+ stack = (unsigned long) argv;
+ stack &= ~(1024 * 1024 - 1);
+ avail = stack - start_vm;
if (physmem_size > avail)
virtmem_size = avail;
end_vm = start_vm + virtmem_size;
Patches currently in stable-queue which might be from jdike@...toit.com are
queue-2.6.25/uml-fix-build-when-slob-is-enabled.patch
queue-2.6.25/uml-fix-bad-ntp-interaction-with-clock.patch
queue-2.6.25/uml-physical-memory-shouldn-t-include-initial-stack.patch
queue-2.6.25/uml-track-and-make-up-lost-ticks.patch
queue-2.6.25/uml-missed-kmalloc-in-pcap_user.c.patch
queue-2.6.25/uml-deal-with-host-time-going-backwards.patch
queue-2.6.25/uml-deal-with-inaccessible-address-space-start.patch
queue-2.6.25/uml-missing-export-of-csum_partial-on-uml-amd64.patch
queue-2.6.25/uml-memcpy-export-needs-to-follow-host-declaration.patch
queue-2.6.25/uml-stub-needs-to-tolerate-sigwinch.patch
queue-2.6.25/uml-work-around-broken-host-ptrace_sysemu.patch
queue-2.6.25/uml-fix-gcc-ices-and-unresolved-externs.patch
queue-2.6.25/uml-fix-boot-crash.patch
--
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