This patch enforces a rule to always use ACPI_VALIDATE_RSDP_SIG for RSDP
signatures passed from table header or ACPI_SIG_RSDP so that truncated
string comparison can be avoided. This could help to fix the issue that
"RSD " matches but "RSD PTR " doesn't match. Lv Zheng.
Signed-off-by: Lv Zheng <lv.zheng@xxxxxxxxx>
Signed-off-by: Bob Moore <robert.moore@xxxxxxxxx>
---
.../acpi/os_specific/service_layers/oslinuxtbl.c | 41 +++++++++++++++-----
1 file changed, 31 insertions(+), 10 deletions(-)
diff --git a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
index dc65098..a8cd344 100644
--- a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
+++ b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
@@ -996,10 +996,21 @@ osl_map_table(acpi_size address,
/* If specified, signature must match */
- if (signature && !ACPI_COMPARE_NAME(signature, mapped_table->signature)) {
- acpi_os_unmap_memory(mapped_table,
- sizeof(struct acpi_table_header));
- return (AE_BAD_SIGNATURE);
+ if (signature) {
+ if (ACPI_VALIDATE_RSDP_SIG(signature)) {
+ if (!ACPI_VALIDATE_RSDP_SIG(mapped_table->signature)) {
+ acpi_os_unmap_memory(mapped_table,
+ sizeof(struct
+ acpi_table_header));
+ return (AE_BAD_SIGNATURE);
+ }
+ } else
+ if (!ACPI_COMPARE_NAME(signature, mapped_table->signature))
+ {
+ acpi_os_unmap_memory(mapped_table,
+ sizeof(struct acpi_table_header));
+ return (AE_BAD_SIGNATURE);
+ }
}
/* Map the entire table */
@@ -1135,12 +1146,22 @@ osl_read_table_from_file(char *filename,
/* If signature is specified, it must match the table */
- if (signature && !ACPI_COMPARE_NAME(signature, header.signature)) {
- fprintf(stderr,
- "Incorrect signature: Expecting %4.4s, found %4.4s\n",
- signature, header.signature);
- status = AE_BAD_SIGNATURE;
- goto exit;
+ if (signature) {
+ if (ACPI_VALIDATE_RSDP_SIG(signature)) {
+ if (!ACPI_VALIDATE_RSDP_SIG(header.signature)) {
+ fprintf(stderr,
+ "Incorrect RSDP signature: found %8.8s\n",
+ header.signature);
+ status = AE_BAD_SIGNATURE;
+ goto exit;
+ }
+ } else if (!ACPI_COMPARE_NAME(signature, header.signature)) {
+ fprintf(stderr,
+ "Incorrect signature: Expecting %4.4s, found %4.4s\n",
+ signature, header.signature);
+ status = AE_BAD_SIGNATURE;
+ goto exit;
+ }
}
table_length = ap_get_table_length(&header);
--
1.7.10
--
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