userns_exec_1: catch errors in the spawned process.

lxc_map_ids can call system(3), which on error from the spawned process returns > 0. No path should return > 0 when it meant success. So check the lxc_map_ids() value to be != rather than just < 0. Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com> Acked-by: Stéphane Graber <stgraber@ubuntu.com>

userns_exec_1: catch errors in the spawned process.
565e571c · Serge Hallyn · Stéphane Graber · b1dad6f6 · 565e571c
Commit 565e571c authored Jan 29, 2014 by Serge Hallyn Committed by Stéphane Graber Jan 29, 2014
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conf.c src/lxc/conf.c +1 -1

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--- a/src/lxc/conf.c
+++ b/src/lxc/conf.c
@@ -4055,7 +4055,7 @@ int userns_exec_1(struct lxc_conf *conf, int (*fn)(void *), void *data)
 	ret = lxc_map_ids(idmap, pid);
 	lxc_free_idmap(idmap);
 	free(idmap);
-	if (ret < 0) {
+	if (ret) {
 		ERROR("Error setting up child mappings");
 		goto err;
 	}