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x86/mce: Panic for LMCE only if mca_cfg.tolerant < 3

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Right now for LMCE, if no_way_out is set, mce_panic() is called
regardless of mca_cfg.tolerant. This is not correct as, if
mca_cfg.tolerant = 3, the code should never panic.

Add that check.

 [ bp: use local ptr 'cfg'. ]

Signed-off-by: Gabriele Paoloni <gabriele.paoloni@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20201127161819.3106432-4-gabriele.paoloni@intel.com
This commit is contained in:
Gabriele Paoloni 2020-11-27 16:18:17 +00:00 • committed by Borislav Petkov
parent e273e6e12a
commit 3a866b16fd
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kernel/cpu/mce/core.c
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@ -1368,7 +1368,7 @@ noinstr void do_machine_check(struct pt_regs *regs)
* to see it will clear it. * to see it will clear it.
*/ */
if (lmce) { if (lmce) {
if (no_way_out) if (no_way_out && cfg->tolerant < 3)
mce_panic("Fatal local machine check", &m, msg); mce_panic("Fatal local machine check", &m, msg);
} else { } else {
order = mce_start(&no_way_out); order = mce_start(&no_way_out);