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| author | luofei <luofei@unicloud.com> | 2022-03-22 14:44:38 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-07-12 16:35:05 +0200 |
| commit | 7a07875fabccc17c4564151c19de2174948d0544 (patch) | |
| tree | e99548d29827472b6f1defc35314a66378670527 /drivers/base | |
| parent | d04b62b64056ce2b5be69bb53d7e0084782fc562 (diff) | |
| download | linux-stable-7a07875fabccc17c4564151c19de2174948d0544.tar.gz linux-stable-7a07875fabccc17c4564151c19de2174948d0544.tar.bz2 linux-stable-7a07875fabccc17c4564151c19de2174948d0544.zip | |
mm/hwpoison: avoid the impact of hwpoison_filter() return value on mce handler
[ Upstream commit d1fe111fb62a1cf0446a2919f5effbb33ad0702c ]
When the hwpoison page meets the filter conditions, it should not be
regarded as successful memory_failure() processing for mce handler, but
should return a distinct value, otherwise mce handler regards the error
page has been identified and isolated, which may lead to calling
set_mce_nospec() to change page attribute, etc.
Here memory_failure() return -EOPNOTSUPP to indicate that the error
event is filtered, mce handler should not take any action for this
situation and hwpoison injector should treat as correct.
Link: https://lkml.kernel.org/r/20220223082135.2769649-1-luofei@unicloud.com
Signed-off-by: luofei <luofei@unicloud.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Miaohe Lin <linmiaohe@huawei.com>
Cc: Naoya Horiguchi <naoya.horiguchi@nec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/base')
| -rw-r--r-- | drivers/base/memory.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/base/memory.c b/drivers/base/memory.c index c0d501a3a714..c778d1df7455 100644 --- a/drivers/base/memory.c +++ b/drivers/base/memory.c @@ -555,6 +555,8 @@ static ssize_t hard_offline_page_store(struct device *dev, return -EINVAL; pfn >>= PAGE_SHIFT; ret = memory_failure(pfn, 0); + if (ret == -EOPNOTSUPP) + ret = 0; return ret ? ret : count; } |