cifs-utils: patch buffer-overflow in ip param handling

https://www.openwall.com/lists/oss-security/2022/04/27/5
https://bugzilla.suse.com/show_bug.cgi?id=1197216
https://github.com/piastry/cifs-utils/pull/7

Fixes: CVE-2022-27239

pkgs/os-specific/linux/cifs-utils/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, lib, fetchurl, autoreconfHook, docutils, pkg-config
+{ stdenv, lib, fetchurl, fetchpatch, autoreconfHook, docutils, pkg-config
 , libkrb5, keyutils, pam, talloc, python3 }:
 
 stdenv.mkDerivation rec {
@@ -10,6 +10,16 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-ZgnoB0tUISlf8BKjHwLM2aBYQVxhnIE2Lrt4jb8HVrg=";
   };
 
+  patches = [
+    (fetchpatch {
+      # Fix buffer-overflow in handling of ip= parameter in mount.cifs
+      # https://www.openwall.com/lists/oss-security/2022/04/27/5
+      name = "CVE-2022-27239.patch";
+      url = "https://github.com/piastry/cifs-utils/commit/007c07fd91b6d42f8bd45187cf78ebb06801139d.patch";
+      sha256 = "sha256-3uoHso2q17r2bcEW+ZjYUWsW4OIGYA7kxYZxQQy0JOg=";
+    })
+  ];
+
   nativeBuildInputs = [ autoreconfHook docutils pkg-config ];
 
   buildInputs = [ libkrb5 keyutils pam talloc python3 ];