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fix null ptr in init_madt #226

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Merged
dkgupta-amzn merged 2 commits into from
Nov 15, 2021
Merged

fix null ptr in init_madt #226

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6e8b092
fix null ptr in init_madt
82marbag Nov 3, 2021
2625b01
Merge branch 'mainline' into fix-init-madt
dkgupta-amzn Nov 15, 2021
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3 changes: 2 additions & 1 deletion common/acpi.c
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Original file line number Diff line number Diff line change
Expand Up @@ -706,11 +706,12 @@ static ACPI_STATUS init_fadt(void) {
static ACPI_STATUS init_madt(unsigned bsp_cpu_id) {
ACPI_TABLE_MADT *madt = acpi_find_table(ACPI_SIG_MADT);
ACPI_SUBTABLE_HEADER *subtbl = (void *) madt + sizeof(*madt);
uint32_t length = madt->Header.Length - sizeof(*madt);

if (!madt || !subtbl)
return AE_ERROR;

uint32_t length = madt->Header.Length - sizeof(*madt);

acpi_walk_subtables(subtbl, length, madt_parser, (void *) _ul(bsp_cpu_id));
return AE_OK;
}
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