From 9b4eb44581f4cecf87fb8f2d753e00553d6d6c29 Mon Sep 17 00:00:00 2001
From: Paul Elder <paul.elder@ideasonboard.com>
Date: Tue, 4 Jun 2019 16:32:12 -0400
Subject: libcamera: ipa_module: verify IPA module API version upon loading

The IPA module API version determines the layout of struct
IPAModuleInfo. If this version number does not match, then it means that
the IPA module information structure can't be interpreted, and the
module can't be used. Validate this version number upon loading the
IPA module info from the IPA shared object.

Signed-off-by: Paul Elder <paul.elder@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 src/libcamera/ipa_module.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src/libcamera/ipa_module.cpp')

diff --git a/src/libcamera/ipa_module.cpp b/src/libcamera/ipa_module.cpp
index f79a44e7..ac166402 100644
--- a/src/libcamera/ipa_module.cpp
+++ b/src/libcamera/ipa_module.cpp
@@ -274,6 +274,11 @@ int IPAModule::loadIPAModuleInfo()
 		ret = elfLoadSymbol<Elf64_Ehdr, Elf64_Shdr, Elf64_Sym>
 				   (&info_, sizeof(info_), map, soSize, "ipaModuleInfo");
 
+	if (info_.moduleAPIVersion != IPA_MODULE_API_VERSION) {
+		LOG(IPAModule, Error) << "IPA module API version mismatch";
+		ret = -EINVAL;
+	}
+
 unmap:
 	munmap(map, soSize);
 close:
-- 
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