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SubjectRe: [PATCH v3] x86/fault: Send a SIGBUS to user process always for hwpoison page access.
On Fri, 5 Feb 2021 17:01:35 +0800
Aili Yao <yaoaili@kingsoft.com> wrote:

> When one page is already hwpoisoned by MCE AO action, processes may not
> be killed, processes mapping this page may make a syscall include this
> page and result to trigger a VM_FAULT_HWPOISON fault, as it's in kernel
> mode it may be fixed by fixup_exception, current code will just return
> error code to user code.
>
> This is not sufficient, we should send a SIGBUS to the process and log
> the info to console, as we can't trust the process will handle the error
> correctly.
>
> Suggested-by: Feng Yang <yangfeng1@kingsoft.com>
> Signed-off-by: Aili Yao <yaoaili@kingsoft.com>
> ---
> arch/x86/mm/fault.c | 62 +++++++++++++++++++++++++++++----------------
> 1 file changed, 40 insertions(+), 22 deletions(-)
>
Hi luto;
Is there any feedback?

Thanks
Aili Yao

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