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-rw-r--r--drivers/acpi/apei/einj.c39
-rw-r--r--drivers/acpi/apei/erst.c20
2 files changed, 50 insertions, 9 deletions
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index 8d457b55c55..fb57d03e698 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -32,6 +32,7 @@
#include <linux/seq_file.h>
#include <linux/nmi.h>
#include <linux/delay.h>
+#include <linux/mm.h>
#include <acpi/acpi.h>
#include "apei-internal.h"
@@ -41,6 +42,10 @@
#define SPIN_UNIT 100 /* 100ns */
/* Firmware should respond within 1 milliseconds */
#define FIRMWARE_TIMEOUT (1 * NSEC_PER_MSEC)
+#define ACPI5_VENDOR_BIT BIT(31)
+#define MEM_ERROR_MASK (ACPI_EINJ_MEMORY_CORRECTABLE | \
+ ACPI_EINJ_MEMORY_UNCORRECTABLE | \
+ ACPI_EINJ_MEMORY_FATAL)
/*
* ACPI version 5 provides a SET_ERROR_TYPE_WITH_ADDRESS action.
@@ -367,7 +372,7 @@ static int __einj_error_trigger(u64 trigger_paddr, u32 type,
* This will cause resource conflict with regular memory. So
* remove it from trigger table resources.
*/
- if ((param_extension || acpi5) && (type & 0x0038) && param2) {
+ if ((param_extension || acpi5) && (type & MEM_ERROR_MASK) && param2) {
struct apei_resources addr_resources;
apei_resources_init(&addr_resources);
trigger_param_region = einj_get_trigger_parameter_region(
@@ -427,7 +432,7 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2)
struct set_error_type_with_address *v5param = einj_param;
v5param->type = type;
- if (type & 0x80000000) {
+ if (type & ACPI5_VENDOR_BIT) {
switch (vendor_flags) {
case SETWA_FLAGS_APICID:
v5param->apicid = param1;
@@ -512,7 +517,34 @@ static int __einj_error_inject(u32 type, u64 param1, u64 param2)
static int einj_error_inject(u32 type, u64 param1, u64 param2)
{
int rc;
+ unsigned long pfn;
+ /*
+ * We need extra sanity checks for memory errors.
+ * Other types leap directly to injection.
+ */
+
+ /* ensure param1/param2 existed */
+ if (!(param_extension || acpi5))
+ goto inject;
+
+ /* ensure injection is memory related */
+ if (type & ACPI5_VENDOR_BIT) {
+ if (vendor_flags != SETWA_FLAGS_MEM)
+ goto inject;
+ } else if (!(type & MEM_ERROR_MASK))
+ goto inject;
+
+ /*
+ * Disallow crazy address masks that give BIOS leeway to pick
+ * injection address almost anywhere. Insist on page or
+ * better granularity and that target address is normal RAM.
+ */
+ pfn = PFN_DOWN(param1 & param2);
+ if (!page_is_ram(pfn) || ((param2 & PAGE_MASK) != PAGE_MASK))
+ return -EINVAL;
+
+inject:
mutex_lock(&einj_mutex);
rc = __einj_error_inject(type, param1, param2);
mutex_unlock(&einj_mutex);
@@ -590,7 +622,7 @@ static int error_type_set(void *data, u64 val)
* Vendor defined types have 0x80000000 bit set, and
* are not enumerated by ACPI_EINJ_GET_ERROR_TYPE
*/
- vendor = val & 0x80000000;
+ vendor = val & ACPI5_VENDOR_BIT;
tval = val & 0x7fffffff;
/* Only one error type can be specified */
@@ -694,6 +726,7 @@ static int __init einj_init(void)
if (rc)
goto err_release;
+ rc = -ENOMEM;
einj_param = einj_get_parameter_address();
if ((param_extension || acpi5) && einj_param) {
fentry = debugfs_create_x64("param1", S_IRUSR | S_IWUSR,
diff --git a/drivers/acpi/apei/erst.c b/drivers/acpi/apei/erst.c
index 6d894bfd8b8..f7b3b39e94f 100644
--- a/drivers/acpi/apei/erst.c
+++ b/drivers/acpi/apei/erst.c
@@ -1180,20 +1180,28 @@ static int __init erst_init(void)
if (!erst_erange.vaddr)
goto err_release_erange;
+ pr_info(ERST_PFX
+ "Error Record Serialization Table (ERST) support is initialized.\n");
+
buf = kmalloc(erst_erange.size, GFP_KERNEL);
spin_lock_init(&erst_info.buf_lock);
if (buf) {
erst_info.buf = buf + sizeof(struct cper_pstore_record);
erst_info.bufsize = erst_erange.size -
sizeof(struct cper_pstore_record);
- if (pstore_register(&erst_info)) {
- pr_info(ERST_PFX "Could not register with persistent store\n");
+ rc = pstore_register(&erst_info);
+ if (rc) {
+ if (rc != -EPERM)
+ pr_info(ERST_PFX
+ "Could not register with persistent store\n");
+ erst_info.buf = NULL;
+ erst_info.bufsize = 0;
kfree(buf);
}
- }
-
- pr_info(ERST_PFX
- "Error Record Serialization Table (ERST) support is initialized.\n");
+ } else
+ pr_err(ERST_PFX
+ "Failed to allocate %lld bytes for persistent store error log\n",
+ erst_erange.size);
return 0;