The patch titled
Subject: mm, hugetlb: remove unnecessary lower bound on sysctl handlers"?
has been removed from the -mm tree. Its filename was
hugetlb-sysctl-pass-extra1-=-null-rather-then-extra1-=-zero.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx>
Subject: mm, hugetlb: remove unnecessary lower bound on sysctl handlers"?
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>
---
kernel/sysctl.c | 3 ---
1 file changed, 3 deletions(-)
diff -puN kernel/sysctl.c~hugetlb-sysctl-pass-extra1-=-null-rather-then-extra1-=-zero kernel/sysctl.c
--- a/kernel/sysctl.c~hugetlb-sysctl-pass-extra1-=-null-rather-then-extra1-=-zero
+++ a/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 -mm which might be from a.ryabinin@xxxxxxxxxxx are
origin.patch
proc-pagemap-walk-page-tables-under-pte-lock.patch
module_device_table-fix-some-callsites.patch
compiler-introduce-__aliassymbol-shortcut.patch
add-kernel-address-sanitizer-infrastructure.patch
add-kernel-address-sanitizer-infrastructure-fix.patch
kasan-disable-memory-hotplug.patch
x86_64-add-kasan-support.patch
x86_64-add-kasan-support-fix.patch
mm-page_alloc-add-kasan-hooks-on-alloc-and-free-paths.patch
mm-slub-introduce-virt_to_obj-function.patch
mm-slub-share-object_err-function.patch
mm-slub-introduce-metadata_access_enable-metadata_access_disable.patch
mm-slub-add-kernel-address-sanitizer-support-for-slub-allocator.patch
fs-dcache-manually-unpoison-dname-after-allocation-to-shut-up-kasans-reports.patch
kmemleak-disable-kasan-instrumentation-for-kmemleak.patch
lib-add-kasan-test-module.patch
x86_64-kasan-add-interceptors-for-memset-memmove-memcpy-functions.patch
kasan-enable-stack-instrumentation.patch
mm-vmalloc-add-flag-preventing-guard-hole-allocation.patch
mm-vmalloc-pass-additional-vm_flags-to-__vmalloc_node_range.patch
kernel-add-support-for-init_array-constructors.patch
module-fix-types-of-device-tables-aliases.patch
kasan-enable-instrumentation-of-global-variables.patch
kasan-enable-instrumentation-of-global-variables-fix.patch
kasan-enable-instrumentation-of-global-variables-fix-2.patch
kasan-enable-instrumentation-of-global-variables-fix-2-fix.patch
linux-next.patch
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