The patch titled
Subject: mm-hwpoison-try-to-recover-from-copy-on-write-faults-v4
has been added to the -mm mm-unstable branch. Its filename is
mm-hwpoison-try-to-recover-from-copy-on-write-faults-v4.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-hwpoison-try-to-recover-from-copy-on-write-faults-v4.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Tony Luck <tony.luck@xxxxxxxxx>
Subject: mm-hwpoison-try-to-recover-from-copy-on-write-faults-v4
Date: Mon, 31 Oct 2022 13:10:28 -0700
add call to kmsan_unpoison_memory(), per Miaohe Lin
Link: https://lkml.kernel.org/r/20221031201029.102123-2-tony.luck@xxxxxxxxx
Reviewed-by: Dan Williams <dan.j.williams@xxxxxxxxx>
Reviewed-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Reviewed-by: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Tested-by: Shuai Xue <xueshuai@xxxxxxxxxxxxxxxxx>
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Message-Id: <20221021200120.175753-2-tony.luck@xxxxxxxxx>
Signed-off-by: Tony Luck <tony.luck@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/highmem.h | 2 ++
1 file changed, 2 insertions(+)
--- a/include/linux/highmem.h~mm-hwpoison-try-to-recover-from-copy-on-write-faults-v4
+++ a/include/linux/highmem.h
@@ -329,6 +329,8 @@ static inline int copy_mc_user_highpage(
vfrom = kmap_local_page(from);
vto = kmap_local_page(to);
ret = copy_mc_to_kernel(vto, vfrom, PAGE_SIZE);
+ if (!ret)
+ kmsan_unpoison_memory(page_address(to), PAGE_SIZE);
kunmap_local(vto);
kunmap_local(vfrom);
_
Patches currently in -mm which might be from tony.luck@xxxxxxxxx are
mm-hwpoison-try-to-recover-from-copy-on-write-faults.patch
mm-hwpoison-try-to-recover-from-copy-on-write-faults-v4.patch
mm-hwpoison-when-copy-on-write-hits-poison-take-page-offline.patch
