x86/mce: Fix siginfo_t->si_addr value for non-recoverable memory faults
In commit dad1743e ("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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6887a413
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