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mm/mm_init.c: report kasan-tag information stored in page->flags

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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.

Signed-off-by: Jing Xia <jing.xia@unisoc.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Chunyan Zhang <chunyan.zhang@unisoc.com>
Cc: Orson Zhai <orson.zhai@unisoc.com>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Link: http://lkml.kernel.org/r/1586929370-10838-1-git-send-email-jing.xia.mail@gmail.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jing Xia 2020-06-01 21:52:49 -07:00 committed by Linus Torvalds
parent 9380ce246a
commit 86fea8b494
1 changed files with 10 additions and 6 deletions
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16
mm/mm_init.c
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@ -67,26 +67,30 @@ void __init mminit_verify_pageflags_layout(void)
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),