Memory leak in ma_net.c

Hey our LSan run identified a memory leak in ma_net.c file. The memory allocated on line 311 is not freed when the function returns on line 340.

You should add this code before returning "ma_net_real_write" on line 340:

#ifdef HAVE_COMPRESS
  if (net->compress)
    free((char*) packet);
#endif

This is what the LSan callstack looks like:

Direct leak of 102 byte(s) in 6 object(s) allocated from:

1. 0 0x7f92a113ab78 in malloc /home/fcm/Perforce/SDK/UnixClang/dev/scripts/llvm_RELEASE_401_source/projects/compiler-rt/lib/asan/asan_malloc_linux.cc:66
2. 1 0x7f92a0383b55 in ma_net_real_write /mariadb-connector-c-3.0.6-src/libmariadb/ma_net.c:311
3. 2 0x7f92a0383c57 in ma_net_flush /mariadb-connector-c-3.0.6-src/libmariadb/ma_net.c:166
4. 3 0x7f92a0383fd8 in ma_net_write_command /mariadb-connector-c-3.0.6-src/libmariadb/ma_net.c:244
5. 4 0x7f92a038b8ba in mthd_my_send_cmd /mariadb-connector-c-3.0.6-src/libmariadb/mariadb_lib.c:395
6. 5 0x7f92a0392736 in net_stmt_close /mariadb-connector-c-3.0.6-src/libmariadb/mariadb_stmt.c:1324
7. 6 0x7f92a0393333 in mysql_stmt_close /mariadb-connector-c-3.0.6-src/libmariadb/mariadb_stmt.c:1344
8. 7 0x7f92a03aa9c7 in mysql_stmt_close_start_internal /mariadb-connector-c-3.0.6-src/libmariadb/mariadb_async.c:1509
9. 8 0x7f92a03aeda0 in my_context_spawn /mariadb-connector-c-3.0.6-src/libmariadb/ma_context.c:201

Can I get a better context on how we could be running into this issue? Are there any known workarounds ?(we are avoiding making a custom version of the package)