From: Ben Hutchings <ben@decadent.org.uk>
Date: Fri, 2 Dec 2016 23:06:18 +0000 (+0000)
Subject: module: Disable matching missing version CRC
X-Git-Tag: archive/raspbian/4.9.82-1+deb9u3+rpi1_jessie~8^2~20
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=a4b27035a56b9d9f722cd75931a886c9a3f6db2d;p=linux-4.9.git

module: Disable matching missing version CRC

This partly reverts commit cd3caefb4663e3811d37cc2afad3cce642d60061.
We want to fail closed if a symbol version CRC is missing, as the
alternative may allow subverting module signing.

Gbp-Pq: Topic bugfix/all
Gbp-Pq: Name module-disable-matching-missing-version-crc.patch
---

diff --git a/kernel/module.c b/kernel/module.c
index fd798970491e..945a8827c76b 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -1301,9 +1301,8 @@ static int check_version(Elf_Shdr *sechdrs,
 		goto bad_version;
 	}
 
-	/* Broken toolchain. Warn once, then let it go.. */
-	pr_warn_once("%s: no symbol version for %s\n", mod->name, symname);
-	return 1;
+	pr_warn("%s: no symbol version for %s\n", mod->name, symname);
+	return 0;
 
 bad_version:
 	pr_warn("%s: disagrees about version of symbol %s\n",