[PATCH v4 07/10] x86/microcode/AMD: Verify patch section type for every such section

[Maciej S. Szmigiero]

We should check whether the patch section currently being processed is
actually a patch section for each of them (not just the first one) in the
late loader verify_and_add_patch() function, just like the early loader
already does in parse_container() function.

Signed-off-by: Maciej S. Szmigiero 
---
 arch/x86/kernel/cpu/microcode/amd.c | 14 +++---
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/amd.c 
b/arch/x86/kernel/cpu/microcode/amd.c
index 096cb58a563f..4d2116d08754 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -613,13 +613,19 @@ static int verify_and_add_patch(u8 family, u8 *fw, size_t 
leftover)
 {
struct microcode_header_amd *mc_hdr;
struct ucode_patch *patch;
-   unsigned int patch_size, crnt_size, ret;
+   unsigned int patch_type, patch_size, crnt_size, ret;
u32 proc_fam;
u16 proc_id;
 
if (leftover < SECTION_HDR_SIZE + sizeof(*mc_hdr))
return leftover;
 
+   patch_type = *(u32 *)fw;
+   if (patch_type != UCODE_UCODE_TYPE) {
+   pr_err("invalid type field in container file section header\n");
+   return -EINVAL;
+   }
+
patch_size  = *(u32 *)(fw + 4);
if (patch_size > PATCH_MAX_SIZE) {
pr_err("patch size %u too large\n", patch_size);
@@ -711,12 +717,6 @@ static enum ucode_state __load_microcode_amd(u8 family, 
const u8 *data,
fw += offset;
leftover = size - CONTAINER_HDR_SZ - offset;
 
-   if (*(u32 *)fw != UCODE_UCODE_TYPE) {
-   pr_err("invalid type field in container file section header\n");
-   free_equiv_cpu_table();
-   return ret;
-   }
-
while (leftover) {
crnt_size = verify_and_add_patch(family, fw, leftover);
if (crnt_size < 0)

[PATCH v4 07/10] x86/microcode/AMD: Verify patch section type for every such section

[Maciej S. Szmigiero]

We should check whether the patch section currently being processed is
actually a patch section for each of them (not just the first one) in the
late loader verify_and_add_patch() function, just like the early loader
already does in parse_container() function.

Signed-off-by: Maciej S. Szmigiero 
---
 arch/x86/kernel/cpu/microcode/amd.c | 14 +++---
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kernel/cpu/microcode/amd.c 
b/arch/x86/kernel/cpu/microcode/amd.c
index 096cb58a563f..4d2116d08754 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -613,13 +613,19 @@ static int verify_and_add_patch(u8 family, u8 *fw, size_t 
leftover)
 {
struct microcode_header_amd *mc_hdr;
struct ucode_patch *patch;
-   unsigned int patch_size, crnt_size, ret;
+   unsigned int patch_type, patch_size, crnt_size, ret;
u32 proc_fam;
u16 proc_id;
 
if (leftover < SECTION_HDR_SIZE + sizeof(*mc_hdr))
return leftover;
 
+   patch_type = *(u32 *)fw;
+   if (patch_type != UCODE_UCODE_TYPE) {
+   pr_err("invalid type field in container file section header\n");
+   return -EINVAL;
+   }
+
patch_size  = *(u32 *)(fw + 4);
if (patch_size > PATCH_MAX_SIZE) {
pr_err("patch size %u too large\n", patch_size);
@@ -711,12 +717,6 @@ static enum ucode_state __load_microcode_amd(u8 family, 
const u8 *data,
fw += offset;
leftover = size - CONTAINER_HDR_SZ - offset;
 
-   if (*(u32 *)fw != UCODE_UCODE_TYPE) {
-   pr_err("invalid type field in container file section header\n");
-   free_equiv_cpu_table();
-   return ret;
-   }
-
while (leftover) {
crnt_size = verify_and_add_patch(family, fw, leftover);
if (crnt_size < 0)