Possible memory leak on FFI call

[dev-null-undefined]

If I am not mistaking the FFI function ngx_http_wasm_ffi_plan_new leaks the plan struct memory as it is allocated in the VM pool and then the pointer is never deallocated.

Allocated in this function here https://github.com/Kong/ngx_wasm_module/blob/main/src/common/lua/ngx_wasm_lua_ffi.c#L48.
And never deallocated.

[thibaultcha]

See https://github.com/Kong/ngx_wasm_module/blob/main/lib/resty/wasmx/proxy_wasm.lua#L142

[dev-null-undefined]

Well that will only invoke the ngx_http_wasm_ffi_plan_free which does indeed clean all the plan allocated stuff but if I am not mistaking not the plan structure it self allocated here

ngx_wasm_module/src/wasm/ngx_wasm_ops.c

Line 53 in b798fc2

plan = ngx_pcalloc(pool, sizeof(ngx_wasm_ops_plan_t));

[thibaultcha]

Oh I see what you mean, ok #678 should fix it!

[thibaultcha]

Thank you for the report!