The quilt patch titled
Subject: kmsan: increase the maximum store size to 4096
has been removed from the -mm tree. Its filename was
kmsan-increase-the-maximum-store-size-to-4096.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: increase the maximum store size to 4096
Date: Fri, 21 Jun 2024 13:34:48 +0200
The inline assembly block in s390's chsc() stores that much.
Link: https://lkml.kernel.org/r/20240621113706.315500-5-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/instrumentation.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
--- a/mm/kmsan/instrumentation.c~kmsan-increase-the-maximum-store-size-to-4096
+++ a/mm/kmsan/instrumentation.c
@@ -110,11 +110,10 @@ void __msan_instrument_asm_store(void *a
ua_flags = user_access_save();
/*
- * Most of the accesses are below 32 bytes. The two exceptions so far
- * are clwb() (64 bytes) and FPU state (512 bytes).
- * It's unlikely that the assembly will touch more than 512 bytes.
+ * Most of the accesses are below 32 bytes. The exceptions so far are
+ * clwb() (64 bytes), FPU state (512 bytes) and chsc() (4096 bytes).
*/
- if (size > 512) {
+ if (size > 4096) {
WARN_ONCE(1, "assembly store size too big: %ld\n", size);
size = 8;
}
_
Patches currently in -mm which might be from iii@xxxxxxxxxxxxx are
