This leakage can be seen through test-io-channel-tls:
$ ../configure --target-list=aarch64-softmmu --enable-sanitizers
$ make ./tests/unit/test-io-channel-tls
$ ./tests/unit/test-io-channel-tls
Indirect leak of 104 byte(s) in 1 object(s) allocated from:
#0 0x7f81d1725808 in __interceptor_malloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cc:144
#1 0x7f81d135ae98 in g_malloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x57e98)
#2 0x55616c5d4c1b in object_new_with_propv ../qom/object.c:795
#3 0x55616c5d4a83 in object_new_with_props ../qom/object.c:768
#4 0x55616c5c5415 in test_tls_creds_create ../tests/unit/test-io-channel-tls.c:70
#5 0x55616c5c5a6b in test_io_channel_tls ../tests/unit/test-io-channel-tls.c:158
#6 0x7f81d137d58d (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x7a58d)
Indirect leak of 32 byte(s) in 1 object(s) allocated from:
#0 0x7f81d1725a06 in __interceptor_calloc ../../../../src/libsanitizer/asan/asan_malloc_linux.cc:153
#1 0x7f81d1472a20 in gnutls_dh_params_init (/lib/x86_64-linux-gnu/libgnutls.so.30+0x46a20)
#2 0x55616c6485ff in qcrypto_tls_creds_x509_load ../crypto/tlscredsx509.c:634
#3 0x55616c648ba2 in qcrypto_tls_creds_x509_complete ../crypto/tlscredsx509.c:694
#4 0x55616c5e1fea in user_creatable_complete ../qom/object_interfaces.c:28
#5 0x55616c5d4c8c in object_new_with_propv ../qom/object.c:807
#6 0x55616c5d4a83 in object_new_with_props ../qom/object.c:768
#7 0x55616c5c5415 in test_tls_creds_create ../tests/unit/test-io-channel-tls.c:70
#8 0x55616c5c5a6b in test_io_channel_tls ../tests/unit/test-io-channel-tls.c:158
#9 0x7f81d137d58d (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x7a58d)
...
SUMMARY: AddressSanitizer: 49143 byte(s) leaked in 184 allocation(s).
The docs for `g_source_add_child_source(source, child_source)` says
"source will hold a reference on child_source while child_source is
attached to it." Therefore, we should unreference the child source at
`qio_channel_tls_read_watch()` after attaching it to `source`. With this
change, ./tests/unit/test-io-channel-tls shows no leakages.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Matheus Tavares Bernardino <quic_mathbern@quicinc.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
c3a2c84ae3