mirror of https://github.com/getdnsapi/getdns.git
Fix uninitialized value in tls_create_object
On the first call to tls_create_object (stub.c), tls_fallback_ok is read before being initialized. This patch initializes tls_fallback_ok to 0 in upsteam_init (context.c) Valgrind complains about the uninitialized value: ==14774== Conditional jump or move depends on uninitialised value(s) ==14774== at 0x1528C3: tls_create_object (stub.c:900) ==14774== by 0x1556AD: upstream_connect (stub.c:2065) ==14774== by 0x15582E: upstream_find_for_transport (stub.c:2109) ==14774== by 0x1558B7: upstream_find_for_netreq (stub.c:2130) ==14774== by 0x156027: _getdns_submit_stub_request (stub.c:2296) ==14774== by 0x1421C8: _getdns_submit_netreq (general.c:478) ==14774== by 0x14261D: getdns_general_ns (general.c:636) ==14774== by 0x142905: _getdns_general_loop (general.c:731) ==14774== by 0x1432FB: getdns_general (general.c:888) ==14774== by 0x118B94: incoming_request_handler (stubby.c:692) ==14774== by 0x14F46B: udp_read_cb (server.c:762) ==14774== by 0x15C86B: poll_read_cb (poll_eventloop.c:295) ==14774== Uninitialised value was created by a heap allocation ==14774== at 0x483877F: malloc (vg_replace_malloc.c:309) ==14774== by 0x123CCF: upstreams_create (context.c:581) ==14774== by 0x128B24: getdns_context_set_upstream_recursive_servers (context.c:2760) ==14774== by 0x12DBFE: _getdns_context_config_setting (context.c:4646) ==14774== by 0x12FF47: getdns_context_config (context.c:4769) ==14774== by 0x1178C2: parse_config (stubby.c:297) ==14774== by 0x117B24: parse_config_file (stubby.c:343) ==14774== by 0x11919F: main (stubby.c:833)
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@ -926,6 +926,7 @@ upstream_init(getdns_upstream *upstream,
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/* For sharing a socket to this upstream with TCP */
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upstream->fd = -1;
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upstream->expires = 0;
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upstream->tls_fallback_ok = 0;
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upstream->tls_obj = NULL;
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upstream->tls_session = NULL;
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upstream->tls_cipher_list = NULL;
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