The patch titled
Subject: mm/mm_init.c: report kasan-tag information stored in page->flags
has been added to the -mm tree. Its filename is
mm-init-report-kasan-tag-information-stored-in-page-flags.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-init-report-kasan-tag-information-stored-in-page-flags.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-init-report-kasan-tag-information-stored-in-page-flags.patch
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------------------------------------------------------
From: Jing Xia <jing.xia@xxxxxxxxxx>
Subject: mm/mm_init.c: report kasan-tag information stored in page->flags
The pageflags_layout_usage shows incorrect message by means of
mminit_loglevel when Kasan runs in the mode of software tag-based enabled
with CONFIG_KASAN_SW_TAGS. This patch corrects it and reports kasan-tag
information.
Link: http://lkml.kernel.org/r/1586929370-10838-1-git-send-email-jing.xia.mail@xxxxxxxxx
Signed-off-by: Jing Xia <jing.xia@xxxxxxxxxx>
Cc: Chunyan Zhang <chunyan.zhang@xxxxxxxxxx>
Cc: Orson Zhai <orson.zhai@xxxxxxxxxx>
Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mm_init.c | 16 ++++++++++------
1 file changed, 10 insertions(+), 6 deletions(-)
--- a/mm/mm_init.c~mm-init-report-kasan-tag-information-stored-in-page-flags
+++ a/mm/mm_init.c
@@ -67,26 +67,30 @@ void __init mminit_verify_pageflags_layo
unsigned long or_mask, add_mask;
shift = 8 * sizeof(unsigned long);
- width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH - LAST_CPUPID_SHIFT;
+ width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH
+ - LAST_CPUPID_SHIFT - KASAN_TAG_WIDTH;
mminit_dprintk(MMINIT_TRACE, "pageflags_layout_widths",
- "Section %d Node %d Zone %d Lastcpupid %d Flags %d\n",
+ "Section %d Node %d Zone %d Lastcpupid %d Kasantag %d Flags %d\n",
SECTIONS_WIDTH,
NODES_WIDTH,
ZONES_WIDTH,
LAST_CPUPID_WIDTH,
+ KASAN_TAG_WIDTH,
NR_PAGEFLAGS);
mminit_dprintk(MMINIT_TRACE, "pageflags_layout_shifts",
- "Section %d Node %d Zone %d Lastcpupid %d\n",
+ "Section %d Node %d Zone %d Lastcpupid %d Kasantag %d\n",
SECTIONS_SHIFT,
NODES_SHIFT,
ZONES_SHIFT,
- LAST_CPUPID_SHIFT);
+ LAST_CPUPID_SHIFT,
+ KASAN_TAG_WIDTH);
mminit_dprintk(MMINIT_TRACE, "pageflags_layout_pgshifts",
- "Section %lu Node %lu Zone %lu Lastcpupid %lu\n",
+ "Section %lu Node %lu Zone %lu Lastcpupid %lu Kasantag %lu\n",
(unsigned long)SECTIONS_PGSHIFT,
(unsigned long)NODES_PGSHIFT,
(unsigned long)ZONES_PGSHIFT,
- (unsigned long)LAST_CPUPID_PGSHIFT);
+ (unsigned long)LAST_CPUPID_PGSHIFT,
+ (unsigned long)KASAN_TAG_PGSHIFT);
mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodezoneid",
"Node/Zone ID: %lu -> %lu\n",
(unsigned long)(ZONEID_PGOFF + ZONEID_SHIFT),
_
Patches currently in -mm which might be from jing.xia@xxxxxxxxxx are
mm-init-report-kasan-tag-information-stored-in-page-flags.patch
