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:

  if (net->compress)
    free((char*) packet);

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/
  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)

Answer Answered by Ian Gilfillan in this comment.

You should rather post this as a bug where the developers will notice it.


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