The quilt patch titled
Subject: kmsan: expose kmsan_get_metadata()
has been removed from the -mm tree. Its filename was
kmsan-expose-kmsan_get_metadata.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: expose kmsan_get_metadata()
Date: Fri, 21 Jun 2024 13:34:53 +0200
Each s390 CPU has lowcore pages associated with it. Each CPU sees its own
lowcore at virtual address 0 through a hardware mechanism called
prefixing. Additionally, all lowcores are mapped to non-0 virtual
addresses stored in the lowcore_ptr[] array.
When lowcore is accessed through virtual address 0, one needs to resolve
metadata for lowcore_ptr[raw_smp_processor_id()].
Expose kmsan_get_metadata() to make it possible to do this from the arch
code.
Link: https://lkml.kernel.org/r/20240621113706.315500-10-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>
---
include/linux/kmsan.h | 9 +++++++++
mm/kmsan/instrumentation.c | 1 +
mm/kmsan/kmsan.h | 1 -
3 files changed, 10 insertions(+), 1 deletion(-)
--- a/include/linux/kmsan.h~kmsan-expose-kmsan_get_metadata
+++ a/include/linux/kmsan.h
@@ -230,6 +230,15 @@ void kmsan_handle_urb(const struct urb *
*/
void kmsan_unpoison_entry_regs(const struct pt_regs *regs);
+/**
+ * kmsan_get_metadata() - Return a pointer to KMSAN shadow or origins.
+ * @addr: kernel address.
+ * @is_origin: whether to return origins or shadow.
+ *
+ * Return NULL if metadata cannot be found.
+ */
+void *kmsan_get_metadata(void *addr, bool is_origin);
+
#else
static inline void kmsan_init_shadow(void)
--- a/mm/kmsan/instrumentation.c~kmsan-expose-kmsan_get_metadata
+++ a/mm/kmsan/instrumentation.c
@@ -14,6 +14,7 @@
#include "kmsan.h"
#include <linux/gfp.h>
+#include <linux/kmsan.h>
#include <linux/kmsan_string.h>
#include <linux/mm.h>
#include <linux/uaccess.h>
--- a/mm/kmsan/kmsan.h~kmsan-expose-kmsan_get_metadata
+++ a/mm/kmsan/kmsan.h
@@ -66,7 +66,6 @@ struct shadow_origin_ptr {
struct shadow_origin_ptr kmsan_get_shadow_origin_ptr(void *addr, u64 size,
bool store);
-void *kmsan_get_metadata(void *addr, bool is_origin);
void __init kmsan_init_alloc_meta_for_range(void *start, void *end);
enum kmsan_bug_reason {
_
Patches currently in -mm which might be from iii@xxxxxxxxxxxxx are
