From: Chen Gong Date: Tue, 19 Mar 2013 06:48:07 +0000 (+0000) Subject: ACPI / APEI: fix error status check condition for CPER X-Git-Tag: firefly_0821_release~3680^2~828^2^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=aaf9d93be71c68558c25b4052ac979ee6b7eb809;p=firefly-linux-kernel-4.4.55.git ACPI / APEI: fix error status check condition for CPER In Table 18-289, ACPI5.0 SPEC, the error data length in CPER Generic Error Data Entry can be 0, which means this generic error data entry can have only one header. So fix the check conditon for it. Signed-off-by: Chen Gong Reviewed-by: Huang Ying Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/acpi/apei/cper.c b/drivers/acpi/apei/cper.c index 1e5d8a40101e..fefc2ca7cc3e 100644 --- a/drivers/acpi/apei/cper.c +++ b/drivers/acpi/apei/cper.c @@ -405,7 +405,7 @@ int apei_estatus_check(const struct acpi_hest_generic_status *estatus) return rc; data_len = estatus->data_length; gdata = (struct acpi_hest_generic_data *)(estatus + 1); - while (data_len > sizeof(*gdata)) { + while (data_len >= sizeof(*gdata)) { gedata_len = gdata->error_data_length; if (gedata_len > data_len - sizeof(*gdata)) return -EINVAL;