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-rw-r--r--src/vendorcode/google/chromeos/vboot2/vboot_logic.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/src/vendorcode/google/chromeos/vboot2/vboot_logic.c b/src/vendorcode/google/chromeos/vboot2/vboot_logic.c
index 0d08d6adb2..fec368c590 100644
--- a/src/vendorcode/google/chromeos/vboot2/vboot_logic.c
+++ b/src/vendorcode/google/chromeos/vboot2/vboot_logic.c
@@ -202,6 +202,17 @@ static int hash_body(struct vb2_context *ctx, struct region_device *fw_main)
if (rv)
return rv;
+ /*
+ * Honor vboot's RW slot size. The expected size is pulled out of
+ * the preamble and obtained through vb2api_init_hash() above. By
+ * creating sub region the RW slot portion of the boot media is
+ * limited.
+ */
+ if (rdev_chain(fw_main, fw_main, 0, expected_size)) {
+ printk(BIOS_ERR, "Unable to restrict CBFS size.\n");
+ return VB2_ERROR_UNKNOWN;
+ }
+
/* Extend over the body */
while (expected_size) {
uint64_t temp_ts;