From: Aki Tuomi <aki.tuomi@open-xchange.com>
Date: Mon, 27 May 2019 09:55:54 +0000 (+0300)
Subject: lib: fd-util - Ensure fd is in valid range
X-Git-Tag: 2.3.9~461
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0fe946d283ceea77190dffaec63f06ee30a6679f;p=thirdparty%2Fdovecot%2Fcore.git

lib: fd-util - Ensure fd is in valid range
---

diff --git a/src/lib/fd-util.c b/src/lib/fd-util.c
index 45dcfcf2d9..0456186595 100644
--- a/src/lib/fd-util.c
+++ b/src/lib/fd-util.c
@@ -99,6 +99,8 @@ void fd_set_nonblock(int fd, bool nonblock)
 {
 	int flags;
 
+	i_assert(fd > -1);
+
 	flags = fcntl(fd, F_GETFL, 0);
 	if (flags < 0)
 		i_fatal("fcntl(%d, F_GETFL) failed: %m", fd);