* [PATCH 2/2] mm/page_owner: determine the last stack state of page with CONFIG_KASAN_DUMP_PAGE=y
@ 2019-09-04 6:57 Walter Wu
0 siblings, 0 replies; only message in thread
From: Walter Wu @ 2019-09-04 6:57 UTC (permalink / raw)
To: Andrey Ryabinin, Alexander Potapenko, Dmitry Vyukov,
Matthias Brugger, Andrew Morton, Thomas Gleixner, Michal Hocko,
Josh Poimboeuf, Greg Kroah-Hartman
Cc: linux-kernel, kasan-dev, linux-mm, linux-arm-kernel,
linux-mediatek, wsd_upstream, Walter Wu
When enable CONFIG_KASAN_DUMP_PAGE, then page_owner will record last stack,
So we need to know the last stack is allocation or free state.
Signed-off-by: Walter Wu <walter-zh.wu@mediatek.com>
---
mm/page_owner.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/mm/page_owner.c b/mm/page_owner.c
index addcbb2ae4e4..2756adca250e 100644
--- a/mm/page_owner.c
+++ b/mm/page_owner.c
@@ -418,6 +418,12 @@ void __dump_page_owner(struct page *page)
nr_entries = stack_depot_fetch(handle, &entries);
pr_alert("page allocated via order %u, migratetype %s, gfp_mask %#x(%pGg)\n",
page_owner->order, migratetype_names[mt], gfp_mask, &gfp_mask);
+#ifdef CONFIG_KASAN_DUMP_PAGE
+ if ((unsigned long)page->flags & PAGE_FLAGS_CHECK_AT_PREP)
+ pr_info("Allocation stack of page:\n");
+ else
+ pr_info("Free stack of page:\n");
+#endif
stack_trace_print(entries, nr_entries, 0);
if (page_owner->last_migrate_reason != -1)
--
2.18.0
^ permalink raw reply related [flat|nested] only message in thread
only message in thread, other threads:[~2019-09-04 6:57 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-09-04 6:57 [PATCH 2/2] mm/page_owner: determine the last stack state of page with CONFIG_KASAN_DUMP_PAGE=y Walter Wu
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).