The quilt patch titled
Subject: kmsan: accept ranges starting with 0 on s390
has been removed from the -mm tree. Its filename was
kmsan-accept-ranges-starting-with-0-on-s390.patch
This patch was dropped because it was merged into the mm-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
Subject: kmsan: accept ranges starting with 0 on s390
Date: Fri, 21 Jun 2024 13:35:05 +0200
On s390 the virtual address 0 is valid (current CPU's lowcore is mapped
there), therefore KMSAN should not complain about it.
Disable the respective check on s390. There doesn't seem to be a Kconfig
option to describe this situation, so explicitly check for s390.
Link: https://lkml.kernel.org/r/20240621113706.315500-22-iii@xxxxxxxxxxxxx
Signed-off-by: Ilya Leoshkevich <iii@xxxxxxxxxxxxx>
Reviewed-by: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Alexander Gordeev <agordeev@xxxxxxxxxxxxx>
Cc: Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>
Cc: Christoph Lameter <cl@xxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Heiko Carstens <hca@xxxxxxxxxxxxx>
Cc: Hyeonggon Yoo <42.hyeyoo@xxxxxxxxx>
Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>
Cc: <kasan-dev@xxxxxxxxxxxxxxxx>
Cc: Marco Elver <elver@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
Cc: Pekka Enberg <penberg@xxxxxxxxxx>
Cc: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Cc: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
Cc: Sven Schnelle <svens@xxxxxxxxxxxxx>
Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx>
Cc: Vlastimil Babka <vbabka@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/kmsan/init.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/mm/kmsan/init.c~kmsan-accept-ranges-starting-with-0-on-s390
+++ a/mm/kmsan/init.c
@@ -33,7 +33,10 @@ static void __init kmsan_record_future_s
bool merged = false;
KMSAN_WARN_ON(future_index == NUM_FUTURE_RANGES);
- KMSAN_WARN_ON((nstart >= nend) || !nstart || !nend);
+ KMSAN_WARN_ON((nstart >= nend) ||
+ /* Virtual address 0 is valid on s390. */
+ (!IS_ENABLED(CONFIG_S390) && !nstart) ||
+ !nend);
nstart = ALIGN_DOWN(nstart, PAGE_SIZE);
nend = ALIGN(nend, PAGE_SIZE);
_
Patches currently in -mm which might be from iii@xxxxxxxxxxxxx are
