From: Gabriele Paoloni gabriele.paoloni@intel.com
[ Upstream commit 3a866b16fd2360a9c4ebf71cfbf7ebfe968c1409 ]
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.co... Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/kernel/cpu/mcheck/mce.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 605395bbf0d82..e77cca7ce9169 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -1062,7 +1062,7 @@ void do_machine_check(struct pt_regs *regs, long error_code) * to see it will clear it. */ if (lmce) { - if (no_way_out) + if (no_way_out && cfg->tolerant < 3) mce_panic("Fatal local machine check", &m, msg); } else { order = mce_start(&no_way_out);