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ssh: ignore timeouts during disconnect 

... as otherwise it risks not cleaning up the libssh2 handle properly
which leads to memory leak!

Assisted-by: Joel Depooter

Closes #1495
Closes #1479

Bug: https://curl.haxx.se/mail/lib-2017-04/0024.html
This commit is contained in:
Daniel Stenberg 2017-05-18 13:04:52 +02:00
parent e5491e0f9c
commit f31760e63b
1 changed files with 15 additions and 12 deletions
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27
lib/ssh.c
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@ -113,6 +113,7 @@
libssh2_sftp_symlink_ex((s), (p), curlx_uztoui(strlen(p)), \
(t), (m), LIBSSH2_SFTP_REALPATH)
/* Local functions: */
static const char *sftp_libssh2_strerror(int err);
static LIBSSH2_ALLOC_FUNC(my_libssh2_malloc);
@ -2815,7 +2816,7 @@ static CURLcode ssh_multi_statemach(struct connectdata *conn, bool *done)
}
static CURLcode ssh_block_statemach(struct connectdata *conn,
bool duringconnect)
bool disconnect)
{
struct ssh_conn *sshc = &conn->proto.sshc;
CURLcode result = CURLE_OK;
@ -2830,17 +2831,19 @@ static CURLcode ssh_block_statemach(struct connectdata *conn,
if(result)
break;
if(Curl_pgrsUpdate(conn))
return CURLE_ABORTED_BY_CALLBACK;
if(!disconnect) {
if(Curl_pgrsUpdate(conn))
return CURLE_ABORTED_BY_CALLBACK;
result = Curl_speedcheck(data, now);
if(result)
break;
result = Curl_speedcheck(data, now);
if(result)
break;
left = Curl_timeleft(data, NULL, duringconnect);
if(left < 0) {
failf(data, "Operation timed out");
return CURLE_OPERATION_TIMEDOUT;
left = Curl_timeleft(data, NULL, FALSE);
if(left < 0) {
failf(data, "Operation timed out");
return CURLE_OPERATION_TIMEDOUT;
}
}
#ifdef HAVE_LIBSSH2_SESSION_BLOCK_DIRECTION
@ -3056,7 +3059,7 @@ static CURLcode scp_disconnect(struct connectdata *conn, bool dead_connection)
state(conn, SSH_SESSION_DISCONNECT);
result = ssh_block_statemach(conn, FALSE);
result = ssh_block_statemach(conn, TRUE);
}
return result;
@ -3210,7 +3213,7 @@ static CURLcode sftp_disconnect(struct connectdata *conn, bool dead_connection)
if(conn->proto.sshc.ssh_session) {
/* only if there's a session still around to use! */
state(conn, SSH_SFTP_SHUTDOWN);
result = ssh_block_statemach(conn, FALSE);
result = ssh_block_statemach(conn, TRUE);
}
DEBUGF(infof(conn->data, "SSH DISCONNECT is done\n"));