systemd/0009-basic-virt-fix-userns-check-on-CONFIG_USER_NS-n-kern.patch

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2017-01-31 17:11:17 +00:00
From 7d7017a583a014c239cf8f68d484f22f67ca80ac Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Fri, 11 Nov 2016 10:54:54 -0500
Subject: [PATCH] basic/virt: fix userns check on CONFIG_USER_NS=n kernel
(#4651)
ENOENT should be treated as "false", but because of the broken errno check it
was treated as an error. So ConditionVirtualization=user-namespaces probably
returned the correct answer, but only by accident.
Fixes #4608.
(cherry picked from commit abd67ce74858491565cde157c7b08fda43d3279c)
---
src/basic/virt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/basic/virt.c b/src/basic/virt.c
index 69b0f96183..d8d57381ad 100644
--- a/src/basic/virt.c
+++ b/src/basic/virt.c
@@ -496,7 +496,7 @@ static int userns_has_mapping(const char *name) {
f = fopen(name, "re");
if (!f) {
log_debug_errno(errno, "Failed to open %s: %m", name);
- return errno == -ENOENT ? false : -errno;
+ return errno == ENOENT ? false : -errno;
}
n = getline(&buf, &n_allocated, f);