read_config_file: ignore driver line without driver name

If there's no driver name, strsep() will set config to NULL and later
processing of the driver name will segfault.

Spotted with zzuf.

Signed-off-by: Yann Droneaud <ydroneaud@opteya.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>

diff --git a/src/init.c b/src/init.c
index 4f0130e85c95601663f894ae85d2e012bb2c5d20..06e550d1db3cdebdf81606e1e619541a42908c16 100644 (file)
--- a/src/init.c
+++ b/src/init.c
@@ -257,7 +257,7 @@ static void read_config_file(const char *path)
 
                field = strsep(&config, "\n\t ");
 
-               if (strcmp(field, "driver") == 0) {
+               if (strcmp(field, "driver") == 0 && config != NULL) {
                        struct ibv_driver_name *driver_name;
 
                        config += strspn(config, "\t ");