aer_hest_parse() could pass a non-AER HEST error source to the function
hest_match_pci(). hest_match_pci() assumes that the HEST error source is
type ACPI_HEST_TYPE_AER_ROOT_PORT, ACPI_HEST_TYPE_AER_ENDPOINT, or
ACPI_HEST_TYPE_AER_BRIDGE. I have a platform that has some
ACPI_HEST_TYPE_GENERIC error sources where hest_match_pci() was trying to
access the structure as if it had the acpi_hest_aer_common fields.
aer_hest_parse() is only ever interested in the AER type HEST error
sources. Add a check on the type of the error souce at the beginning of
aer_hest_parse().
Signed-off-by: Betty Dall <betty.dall@xxxxxx>
---
drivers/pci/pcie/aer/aerdrv_acpi.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/drivers/pci/pcie/aer/aerdrv_acpi.c b/drivers/pci/pcie/aer/aerdrv_acpi.c
index cf611ab..39186e3 100644
--- a/drivers/pci/pcie/aer/aerdrv_acpi.c
+++ b/drivers/pci/pcie/aer/aerdrv_acpi.c
@@ -56,6 +56,10 @@ static int aer_hest_parse(struct acpi_hest_header *hest_hdr, void *data)
struct acpi_hest_aer_common *p;
int ff;
+ if (hest_hdr->type != ACPI_HEST_TYPE_AER_ROOT_PORT &&
+ hest_hdr->type != ACPI_HEST_TYPE_AER_ENDPOINT &&
+ hest_hdr->type != ACPI_HEST_TYPE_AER_BRIDGE)
+ return 0;
p = (struct acpi_hest_aer_common *)(hest_hdr + 1);
ff = !!(p->flags & ACPI_HEST_FIRMWARE_FIRST);
if (p->flags & ACPI_HEST_GLOBAL) {
--
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