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fix(bootloader_support): guard NULL efuse digest slot in secure-boot verify

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This commit is contained in:
Ashish Sharma
2026-07-13 14:40:44 +08:00
parent ef4ecd0591
commit bcfb0407f9
1 changed files with 7 additions and 1 deletions
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components/bootloader_support/src/secure_boot_v2/secure_boot_signatures_app.c
+7 -1
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@@ -314,7 +314,13 @@ esp_err_t esp_secure_boot_verify_with_efuse_digest_index(int efuse_digest_index,
// Read key digests from efuse
esp_secure_boot_key_digests_t efuse_key_digests;
memset(&efuse_key_digests, 0, sizeof(esp_secure_boot_key_digests_t));
esp_secure_boot_read_key_digests(&efuse_key_digests);
/* A non-revoked slot can still be unprovisioned, leaving its digest pointer NULL even
* when the read returns ESP_OK; comparing it would dereference NULL in memcmp(). Check
* both the read result and the specific slot (matches get_secure_boot_key_digests()). */
if (esp_secure_boot_read_key_digests(&efuse_key_digests) != ESP_OK ||
efuse_key_digests.key_digests[efuse_digest_index] == NULL) {
return ESP_FAIL;
}
for (int i = 0; i < img_key_digests.num_digests; i++) {
if (!memcmp(img_key_digests.key_digests[i], efuse_key_digests.key_digests[efuse_digest_index], ESP_SECURE_BOOT_KEY_DIGEST_LEN)) {