Curl 8.12 access violation with c-ares when HTTPS-RR enabled #16216
Description
Hi,
I've just compiled and tested curl 8.12 and have an Access violation related to c-ares.
This issue was not present on 8.11.1
⏩ use case :
curl -v https://www.google.com/
and
<?php curl_exec(curl_init("https://www.google.com/")); ?>
✅ when compiling with -DENABLE_ARES=OFF: all works
🔴 when compiling with -DENABLE_ARES=ON : I have this exception
libcurl!init_resolve_thread+0x2de
libcurl!Curl_resolv+0x9a8
libcurl!resolve_server+0x121
libcurl!create_conn+0xc26
libcurl!state_connect+0x49
libcurl!multi_runsingle+0x42f
libcurl!curl_multi_perform+0x11e
libcurl!easy_perform+0x1d5
FAULTING_SOURCE_FILE: C:\sdk\src\curl\lib\asyn-thread.c
FAULTING_SOURCE_CODE:
387: struct Curl_easy *data = td->tsd.data;
388: #endif
389:
390: #ifdef USE_HTTPSRR_ARES
> 391: ares_destroy(data->state.async.tdata->channel);
392: #endif
393: /*
394: * if the thread is still blocking in the resolve syscall, detach it and
395: * let the thread do the cleanup...
396: */
IMAGE_NAME: libcurl.dll
FAILURE_BUCKET_ID: NULL_CLASS_PTR_READ_c0000005_libcurl.dll!init_resolve_thread
OS_VERSION: 10.0.26100.1
BUILDLAB_STR: ge_release
OSPLATFORM_TYPE: x64
IMAGE_VERSION: 8.12.0.0
- my CMake C-Ares
- my CMake Curl
...
-- Found Cares: C:/sdk/release/vs17_x64-avx2/include (found version "1.34.4")
...
-- LTO supported and enabled
-- Protocols: dict file ftp ftps gopher gophers http https imap imaps ipfs ipns ldap ldaps mqtt pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp ws wss
-- Features: alt-svc asyn-rr AsynchDNS brotli HSTS HTTP2 HTTPS-proxy HTTPSRR IDN IPv6 Kerberos Largefile libz MultiSSL NTLM SPNEGO SSL SSPI threadsafe TLS-SRP Unicode UnixSockets zstd
-- Enabled SSL backends: OpenSSL v3+ Schannel
I expected the following
No response
curl/libcurl version
8.12.0
operating system
Windows 11 24h2 x64
-- Using CMake version 3.31.5
-- curl version=[8.12.0-DEV]
-- The C compiler identification is MSVC 19.42.34438.0