amd64_edac: Beef up early exit reporting
Add paranoid checks for the sys address before going off and decoding
it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 4bba43e..e4ad091 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -1380,9 +1380,20 @@
debugf1("(range %d) SystemAddr= 0x%llx Limit=0x%llx\n",
range, sys_addr, get_dram_limit(pvt, range));
- if (intlv_en &&
- (intlv_sel != ((sys_addr >> 12) & intlv_en)))
+ if (dhar_valid(pvt) &&
+ dhar_base(pvt) <= sys_addr &&
+ sys_addr < BIT_64(32)) {
+ amd64_warn("Huh? Address is in the MMIO hole: 0x%016llx\n",
+ sys_addr);
return -EINVAL;
+ }
+
+ if (intlv_en &&
+ (intlv_sel != ((sys_addr >> 12) & intlv_en))) {
+ amd64_warn("Botched intlv bits, en: 0x%x, sel: 0x%x\n",
+ intlv_en, intlv_sel);
+ return -EINVAL;
+ }
sys_addr = f10_swap_interleaved_region(pvt, sys_addr);