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tcp: Avoid (theoretical) resource leak (CWE-772) Coverity warning

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If tcp_timer_ctl() gets a socket number greater than SOCKET_MAX
(2 ^ 24), we return error but we don't close the socket. This is a
rather formal issue given that, at least on Linux, socket numbers are
monotonic and we're in general not allowed to open so many sockets.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Stefano Brivio 2023-02-27 03:13:31 +01:00
parent a1d5537741
commit 4f523c3276
1 changed files with 3 additions and 0 deletions
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3
tcp.c
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@ -702,6 +702,9 @@ static void tcp_timer_ctl(const struct ctx *c, struct tcp_tap_conn *conn)
fd = timerfd_create(CLOCK_MONOTONIC, 0);
if (fd == -1 || fd > SOCKET_MAX) {
debug("TCP: failed to get timer: %s", strerror(errno));
if (fd > -1)
close(fd);
conn->timer = -1;
return;
}
conn->timer = fd;