From: Christian Brauner <christian.brauner@ubuntu.com>
Date: Tue, 6 Apr 2021 15:10:49 +0000 (+0200)
Subject: macro: ensure ret_errno() always returns negative
X-Git-Tag: lxc-5.0.0~215^2~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0a3b86f90ceac8de887095fc7904851d67fac413;p=thirdparty%2Flxc.git

macro: ensure ret_errno() always returns negative

Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
---

diff --git a/src/lxc/macro.h b/src/lxc/macro.h
index 4c13f8335..42f95c235 100644
--- a/src/lxc/macro.h
+++ b/src/lxc/macro.h
@@ -663,10 +663,10 @@ enum {
 		__internal_ret__;                             \
 	})
 
-#define ret_errno(__errno__)         \
-	({                           \
-		errno = (__errno__); \
-		-(__errno__);        \
+#define ret_errno(__errno__)             \
+	({                               \
+		errno = labs(__errno__); \
+		-errno;                  \
 	})
 
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