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upstream: Check return value from fctnl and warn on failure.

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Spotted by Coverity, ok djm@

OpenBSD-Commit-ID: 2097c7db3cf657f1e3a6c5077041bacc63143cab
This commit is contained in:
dtucker@openbsd.org 2023-03-03 02:34:29 +00:00 committed by Darren Tucker
parent 5fc60e8246
commit 32755a98c2
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1 changed files with 3 additions and 2 deletions
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sshconnect2.c
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@ -1,4 +1,4 @@
/* $OpenBSD: sshconnect2.c,v 1.362 2023/02/17 04:22:50 dtucker Exp $ */ /* $OpenBSD: sshconnect2.c,v 1.363 2023/03/03 02:34:29 dtucker Exp $ */
/* /*
* Copyright (c) 2000 Markus Friedl. All rights reserved. * Copyright (c) 2000 Markus Friedl. All rights reserved.
* Copyright (c) 2008 Damien Miller. All rights reserved. * Copyright (c) 2008 Damien Miller. All rights reserved.
@ -2075,7 +2075,8 @@ ssh_keysign(struct ssh *ssh, struct sshkey *key, u_char **sigp, size_t *lenp,
if (dup2(sock, STDERR_FILENO + 1) == -1) if (dup2(sock, STDERR_FILENO + 1) == -1)
fatal_f("dup2: %s", strerror(errno)); fatal_f("dup2: %s", strerror(errno));
sock = STDERR_FILENO + 1; sock = STDERR_FILENO + 1;
fcntl(sock, F_SETFD, 0); /* keep the socket on exec */ if (fcntl(sock, F_SETFD, 0) == -1) /* keep the socket on exec */
debug3_f("fcntl F_SETFD: %s", strerror(errno));
closefrom(sock + 1); closefrom(sock + 1);
debug3_f("[child] pid=%ld, exec %s", debug3_f("[child] pid=%ld, exec %s",