x86/mce: Fix siginfo_t->si_addr value for non-recoverable memory faults

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In commit dad1743e59 ("x86/mce: Only restart instruction after machine
check recovery if it is safe") we fixed mce_notify_process() to force a
signal to the current process if it was not restartable (RIPV bit not
set in MCG_STATUS). But doing it here means that the process doesn't
get told the virtual address of the fault via siginfo_t->si_addr. This
would prevent application level recovery from the fault.

Make a new MF_MUST_KILL flag bit for memory_failure() et al. to use so
that we will provide the right information with the signal.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Acked-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: stable@kernel.org    # 3.4+

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This commit is contained in:

Tony Luck 2012-07-11 10:20:47 -07:00

parent 6887a4131d

commit 6751ed65dc

3 changed files with 13 additions and 8 deletions

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6

arch/x86/kernel/cpu/mcheck/mce.c

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1

include/linux/mm.h

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14

mm/memory-failure.c

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