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efi: cper: check section header more appropriately 

When checking a generic status block, we iterate over all the generic data
blocks. The loop condition checks that the generic data block is valid.
Because the size of data blocks (excluding error data) may vary depending
on the revision and the revision is contained within the data block, we
should ensure that enough of the current data block is valid appropriately
for different revision.

Signed-off-by: Shuai Xue <xueshuai@linux.alibaba.com>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Shuai Xue 2021-08-23 19:56:54 +08:00 committed by Ard Biesheuvel
parent b31eea2e04
commit 1be72c8e07
1 changed files with 1 additions and 1 deletions
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2
drivers/firmware/efi/cper.c
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@ -632,7 +632,7 @@ int cper_estatus_check(const struct acpi_hest_generic_status *estatus)
data_len = estatus->data_length; data_len = estatus->data_length;
apei_estatus_for_each_section(estatus, gdata) { apei_estatus_for_each_section(estatus, gdata) {
if (sizeof(struct acpi_hest_generic_data) > data_len) if (acpi_hest_get_size(gdata) > data_len)
return -EINVAL; return -EINVAL;
record_size = acpi_hest_get_record_size(gdata); record_size = acpi_hest_get_record_size(gdata);