This is a note to let you know that I've just added the patch titled
mm, hugetlb: remove unnecessary lower bound on sysctl handlers"?
to the 3.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mm-hugetlb-remove-unnecessary-lower-bound-on-sysctl-handlers.patch
and it can be found in the queue-3.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3cd7645de624939c38f5124b4ac15f8b35a1a8b7 Mon Sep 17 00:00:00 2001
From: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx>
Date: Tue, 10 Feb 2015 14:11:33 -0800
Subject: mm, hugetlb: remove unnecessary lower bound on sysctl handlers"?
From: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx>
commit 3cd7645de624939c38f5124b4ac15f8b35a1a8b7 upstream.
Commit ed4d4902ebdd ("mm, hugetlb: remove hugetlb_zero and
hugetlb_infinity") replaced 'unsigned long hugetlb_zero' with 'int zero'
leading to out-of-bounds access in proc_doulongvec_minmax(). Use
'.extra1 = NULL' instead of '.extra1 = &zero'. Passing NULL is
equivalent to passing minimal value, which is 0 for unsigned types.
Fixes: ed4d4902ebdd ("mm, hugetlb: remove hugetlb_zero and hugetlb_infinity")
Signed-off-by: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx>
Reported-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Suggested-by: Manfred Spraul <manfred@xxxxxxxxxxxxxxxx>
Acked-by: David Rientjes <rientjes@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
kernel/sysctl.c | 3 ---
1 file changed, 3 deletions(-)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1248,7 +1248,6 @@ static struct ctl_table vm_table[] = {
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = hugetlb_sysctl_handler,
- .extra1 = &zero,
},
#ifdef CONFIG_NUMA
{
@@ -1257,7 +1256,6 @@ static struct ctl_table vm_table[] = {
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = &hugetlb_mempolicy_sysctl_handler,
- .extra1 = &zero,
},
#endif
{
@@ -1280,7 +1278,6 @@ static struct ctl_table vm_table[] = {
.maxlen = sizeof(unsigned long),
.mode = 0644,
.proc_handler = hugetlb_overcommit_handler,
- .extra1 = &zero,
},
#endif
{
Patches currently in stable-queue which might be from a.ryabinin@xxxxxxxxxxx are
queue-3.19/mm-hugetlb-remove-unnecessary-lower-bound-on-sysctl-handlers.patch
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