lib-smtp: client: Fix segmentation fault occurring at transaction timeout.

In the DATA command callback trans->cmd_data can be NULL when the command is
aborted from smtp_client_transaction_fail_reply().

diff --git a/src/lib-smtp/smtp-client-transaction.c b/src/lib-smtp/smtp-client-transaction.c
index 95a06eedae472f86f8f00bc56ce9da6df5793998..0f486c6b39326ba60e176340511d6d649390ebe6 100644 (file)
--- a/src/lib-smtp/smtp-client-transaction.c
+++ b/src/lib-smtp/smtp-client-transaction.c
@@ -661,7 +661,8 @@ smtp_client_transaction_data_cb(const struct smtp_reply *reply,
        smtp_client_transaction_ref(trans);
 
        rcpt = array_get_modifiable(&trans->rcpts, &count);
-       if (trans->rcpt_next_data_idx == 0 && count > 0) 
+       if (trans->cmd_data != NULL && /* NULL when failed early */
+           trans->rcpt_next_data_idx == 0 && count > 0)
                smtp_client_command_set_replies(trans->cmd_data, count);
        for (i = trans->rcpt_next_data_idx; i < count; i++) {
                trans->rcpt_next_data_idx = i + 1;