libmbim-glib,message: fix leak when processing string array is aborted
We must define the GPtrArray with a valid GDestroyFunc for its elements, so that if we abort reading the string array due to a bug in one of its elements, we fully cleanup the GPtrArray and its temporary contents.
Direct leak of 1 byte(s) in 1 object(s) allocated from:
#0 0x566dc312fb8e in malloc
#1 0x7ab42f23ac00 in try_malloc_n /build/amd64-generic/tmp/portage/dev-libs/glib-2.74.1-r1/work/glib-2.74.1/glib/gutf8.c:831:20
#2 0x7ab42f23b23e in g_utf16_to_utf8 /build/amd64-generic/tmp/portage/dev-libs/glib-2.74.1-r1/work/glib-2.74.1/glib/gutf8.c:1108:12
#3 0x566dc3160ebc in _mbim_message_read_string /build/amd64-generic/tmp/portage/net-libs/libmbim-1.29.7-r109/work/libmbim-1.29.7/src/libmbim-glib/mbim-message.c:608:16
#4 0x566dc3161203 in _mbim_message_read_string_array /build/amd64-generic/tmp/portage/net-libs/libmbim-1.29.7-r109/work/libmbim-1.29.7/src/libmbim-glib/mbim-message.c:664:14
#5 0x566dc31a65bd in mbim_message_subscriber_ready_status_notification_get_printable /build/amd64-generic/tmp/portage/net-libs/libmbim-1.29.7-r109/work/libmbim-1.29.7-build/src/libmbim-glib/generated/mbim-basic-connect.c:3535:14
#6 0x566dc3169111 in mbim_message_get_printable_full /build/amd64-generic/tmp/portage/net-libs/libmbim-1.29.7-r109/work/libmbim-1.29.7/src/libmbim-glib/mbim-message.c:0
#7 0x566dc315f0b5 in LLVMFuzzerTestOneInput /build/amd64-generic/tmp/portage/net-libs/libmbim-1.29.7-r109/work/libmbim-1.29.7/src/libmbim-glib/test/test-message-fuzzer.c:31:17
#8 0x566dc3063020 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long)
#9 0x566dc304d890 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long)
#10 0x566dc3052d54 in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long))
#11 0x566dc307e3b2 in main
#12 0x7ab42e81b6c5 in __libc_start_call_main
#13 0x7ab42e81b781 in __libc_start_main_impl
#14 0x566dc3044c80 in _startFixes d39f942f