kbuild: scripts/basic/fixdep segfault on pathological string-o-death

[firefly-linux-kernel-4.4.55.git] / scripts / basic / fixdep.c

diff --git a/scripts/basic/fixdep.c b/scripts/basic/fixdep.c
index 6bc7e7cfccf64a6c600ac4251dace743985eb3b4..8912c0f5460b502f4bb3568dea39f09af5b438d3 100644 (file)
--- a/scripts/basic/fixdep.c
+++ b/scripts/basic/fixdep.c
@@ -249,6 +249,8 @@ void parse_config_file(char *map, size_t len)
        found:
                if (!memcmp(q - 7, "_MODULE", 7))
                        q -= 7;
+               if( (q-p-7) < 0 )
+                       continue;
                use_config(p+7, q-p-7);
        }
 }