[PATCH 7/8] dmi: dmicheck: fix incorrect safe memory read check on DMI mmap'd region

[Colin King]

From: Colin Ian King <colin.king at canonical.com>

We should be checking the mmap'd address and not the original physical address.

Fixes: 07bffc61ffb0 ("dmi: dmicheck: ensure mmap'd SMBIOS data is readable before accessing it")
Signed-off-by: Colin Ian King <colin.king at canonical.com>
---
 src/dmi/dmicheck/dmicheck.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/dmi/dmicheck/dmicheck.c b/src/dmi/dmicheck/dmicheck.c
index 306a0088..eca49717 100644
--- a/src/dmi/dmicheck/dmicheck.c
+++ b/src/dmi/dmicheck/dmicheck.c
@@ -333,7 +333,7 @@ static void* dmi_table_smbios(fwts_framework *fw, fwts_smbios_entry *entry)
 	mem = fwts_mmap(addr, length);
 	if (mem != FWTS_MAP_FAILED) {
 		/* Can we safely copy the table? */
-		if (fwts_safe_memread((void *)addr, length) != FWTS_OK) {
+		if (fwts_safe_memread((void *)mem, length) != FWTS_OK) {
 			fwts_log_info(fw, "SMBIOS table at %p cannot be read", (void *)addr);
 			(void)fwts_munmap(mem, length);
 			return NULL;
@@ -380,7 +380,7 @@ static void* dmi_table_smbios30(fwts_framework *fw, fwts_smbios30_entry *entry)
 	mem = fwts_mmap(addr, length);
 	if (mem != FWTS_MAP_FAILED) {
 		/* Can we safely copy the table? */
-		if (fwts_safe_memread((void *)addr, length) != FWTS_OK) {
+		if (fwts_safe_memread((void *)mem, length) != FWTS_OK) {
 			fwts_log_info(fw, "SMBIOS table at %p cannot be read", (void *)addr);
 			(void)fwts_munmap(mem, length);
 			return NULL;
-- 
2.11.0