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slirp: fork_exec(): Don't close() a negative number in fork_exec()

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In a fork_exec() error path we try to closesocket(s) when s might
be a negative number because the thing that failed was the
qemu_socket() call. Add a guard so we don't do this.

(Spotted by Coverity: CID 1005727 issue 1 of 2.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
This commit is contained in:
Peter Maydell 2017-07-09 18:54:22 +01:00 committed by Samuel Thibault
parent e88718fc0b
commit 12dccfe4f5
1 changed files with 3 additions and 1 deletions
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4
slirp/misc.c
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@ -112,7 +112,9 @@ fork_exec(struct socket *so, const char *ex, int do_pty)
bind(s, (struct sockaddr *)&addr, addrlen) < 0 ||
listen(s, 1) < 0) {
error_report("Error: inet socket: %s", strerror(errno));
closesocket(s);
if (s >= 0) {
closesocket(s);
}
return 0;
}