From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Fri, 31 Aug 2018 17:33:51 +0000 (-0400)
Subject: Fix: runas check fd value before calling close()
X-Git-Url: http://git.efficios.com/?p=lttng-tools.git;a=commitdiff_plain;h=9abb7e4a8758e6894872d81aef285aa2b521318a

Fix: runas check fd value before calling close()

A bug could cause an 'open' command to return no FD in which
case the initial value of '-1' would be used in the call to
close().

Reported-by: Coverity Scan (1395329 Improper use of negative value)
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
---

diff --git a/src/common/runas.c b/src/common/runas.c
index debc95926..f3adf7355 100644
--- a/src/common/runas.c
+++ b/src/common/runas.c
@@ -466,6 +466,9 @@ int cleanup_received_fd(enum run_as_cmd cmd, int fd)
 		return 0;
 	}
 
+	if (fd < 0) {
+		return 0;
+	}
 	ret = close(fd);
 	if (ret < 0) {
 		PERROR("close error");