This is a note to let you know that I've just added the patch titled x86/mce: Fix possibly incorrect severity calculation on AMD to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-mce-fix-possibly-incorrect-severity-calculation-.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit fe90fd81ccf1c7c38dcd367cfacdf0593600941e Author: Jan H. Schönherr <jschoenh@xxxxxxxxx> Date: Tue Dec 10 01:07:30 2019 +0100 x86/mce: Fix possibly incorrect severity calculation on AMD [ Upstream commit a3a57ddad061acc90bef39635caf2b2330ce8f21 ] The function mce_severity_amd_smca() requires m->bank to be initialized for correct operation. Fix the one case, where mce_severity() is called without doing so. Fixes: 6bda529ec42e ("x86/mce: Grade uncorrected errors for SMCA-enabled systems") Fixes: d28af26faa0b ("x86/MCE: Initialize mce.bank in the case of a fatal error in mce_no_way_out()") Signed-off-by: Jan H. Schönherr <jschoenh@xxxxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Reviewed-by: Tony Luck <tony.luck@xxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: linux-edac <linux-edac@xxxxxxxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: x86-ml <x86@xxxxxxxxxx> Cc: Yazen Ghannam <Yazen.Ghannam@xxxxxxx> Link: https://lkml.kernel.org/r/20191210000733.17979-4-jschoenh@xxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c index 87ed8462a5c7..1f69b12d5bb8 100644 --- a/arch/x86/kernel/cpu/mcheck/mce.c +++ b/arch/x86/kernel/cpu/mcheck/mce.c @@ -812,8 +812,8 @@ static int mce_no_way_out(struct mce *m, char **msg, unsigned long *validp, if (quirk_no_way_out) quirk_no_way_out(i, m, regs); + m->bank = i; if (mce_severity(m, mca_cfg.tolerant, &tmp, true) >= MCE_PANIC_SEVERITY) { - m->bank = i; mce_read_aux(m, i); *msg = tmp; return 1;