DATA RACE in resty's middleware (go-resty/resty/v2.releaseBuffer())

[1713266]

We detected a data race in resty's middleware when releasing/resetting the buffer. Please check.

Go Version: 1.21.1
Resty Version: v2.10.0

==================
WARNING: DATA RACE
Read at 0x00c001e91ce0 by goroutine 537694:
  bytes.(*Buffer).Reset()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/bytes/buffer.go:107 +0x46
  github.com/go-resty/resty/v2.releaseBuffer()
      /testDirectory/vendor/github.com/go-resty/resty/v2/util.go:298 +0x41
  github.com/go-resty/resty/v2.handleRequestBody()
      /testDirectory/vendor/github.com/go-resty/resty/v2/middleware.go:484 +0x6e
  github.com/go-resty/resty/v2.parseRequestBody()
      /testDirectory/vendor/github.com/go-resty/resty/v2/middleware.go:193 +0x290
  github.com/go-resty/resty/v2.(*Client).execute()
      /testDirectory/vendor/github.com/go-resty/resty/v2/client.go:1164 +0x550
  github.com/go-resty/resty/v2.(*Request).Execute.func2()
     /testDirectory/vendor/github.com/go-resty/resty/v2/request.go:947 +0x179
  github.com/go-resty/resty/v2.Backoff()
     /testDirectory/vendor/github.com/go-resty/resty/v2/retry.go:115 +0x1d5
  github.com/go-resty/resty/v2.(*Request).Execute()
      /testDirectory/vendor/github.com/go-resty/resty/v2/request.go:941 +0xac4
  github.com/go-resty/resty/v2.(*Request).Post()
      /testDirectory/vendor/github.com/go-resty/resty/v2/request.go:862 +0x344
  github.wdf.sap.corp/ift/sl-core/pkg/slp/client.sumHandler.sendUserInput()
      /testDirectory/vendor/github.wdf.sap.corp/ift/sl-core/pkg/slp/client/sum_handler.go:69 +0x2cf
  github.wdf.sap.corp/ift/sl-core/pkg/slp/client.(*sumHandler).sendUserInput()
      <autogenerated>:1 +0x84
  github.wdf.sap.corp/ift/sl-core/pkg/slp/client.(*Client).SendUserInput()
      /testDirectory/vendor/github.wdf.sap.corp/ift/sl-core/pkg/slp/client/slp_client.go:536 +0x119e
  github.wdf.sap.corp/ift/slocon/pkg/task/slpclient.FinishedResponse.evaluate()
      /testDirectory/pkg/task/slpclient/onstatefinished.go:160 +0x10a2
  github.wdf.sap.corp/ift/slocon/pkg/task/slpclient.(*dialogHandler).evaluateResponses()
      /testDirectory/pkg/task/slpclient/dialogHandler.go:685 +0x977
  github.wdf.sap.corp/ift/slocon/pkg/task/slpclient.(*dialogHandler).onMessagebox()
      /testDirectory/pkg/task/slpclient/dialogHandler.go:615 +0x3cb
  github.wdf.sap.corp/ift/slocon/pkg/task/slpclient.(*dialogHandler).OnStateDialog()
      /testDirectory/pkg/task/slpclient/dialogHandler.go:592 +0x2cd
  github.wdf.sap.corp/ift/sl-core/pkg/slp/client.(*Loop).Poll()
      /testDirectory/vendor/github.wdf.sap.corp/ift/sl-core/pkg/slp/client/loop.go:319 +0x1f85
  github.wdf.sap.corp/ift/sl-core/pkg/slp/client.(*Loop).Run.func1()
      /testDirectory/vendor/github.wdf.sap.corp/ift/sl-core/pkg/slp/client/loop.go:191 +0x107

Previous write at 0x00c001e91ce0 by goroutine 537693:
  bytes.(*Buffer).Reset()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/bytes/buffer.go:107 +0x50
  github.com/go-resty/resty/v2.releaseBuffer()
      /testDirectory/vendor/github.com/go-resty/resty/v2/util.go:298 +0x41
  github.com/go-resty/resty/v2.(*requestBodyReleaser).Close.func1()
      /testDirectory/vendor/github.com/go-resty/resty/v2/util.go:325 +0x45
  sync.(*Once).doSlow()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/sync/once.go:74 +0xf0
  sync.(*Once).Do()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/sync/once.go:65 +0x44
  github.com/go-resty/resty/v2.(*requestBodyReleaser).Close()
      /testDirectory/vendor/github.com/go-resty/resty/v2/util.go:324 +0x7d
  net/http.(*readTrackingBody).Close()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/net/http/transport.go:658 +0x4f
  net/http.(*transferWriter).writeBody.func1()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/net/http/transfer.go:343 +0x9a
  runtime.deferreturn()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/runtime/panic.go:477 +0x30
  net/http.(*Request).write()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/net/http/request.go:738 +0x12cc
  net/http.(*persistConn).writeLoop()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/net/http/transport.go:2424 +0x312
  net/http.(*Transport).dialConn.func6()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/net/http/transport.go:1777 +0x33

Goroutine 537694 (running) created at:
  github.wdf.sap.corp/ift/sl-core/pkg/slp/client.(*Loop).Run()
      /testDirectory/vendor/github.wdf.sap.corp/ift/sl-core/pkg/slp/client/loop.go:173 +0x164
  github.wdf.sap.corp/ift/slocon/pkg/task/slpclient.slpClientClass.Run()
      /testDirectory/pkg/task/slpclient/slpclient.go:163 +0x970
  github.wdf.sap.corp/ift/slocon/pkg/task/slpclient.(*slpClientClass).Run()
      <autogenerated>:1 +0x95
  github.wdf.sap.corp/ift/slocon/pkg/task.(*Task).start.func3()
      /testDirectory/pkg/task/task.go:595 +0x1d4

Goroutine 537693 (finished) created at:
  net/http.(*Transport).dialConn()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/net/http/transport.go:1777 +0x256a
  net/http.(*Transport).dialConnFor()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/net/http/transport.go:1467 +0x129
  net/http.(*Transport).queueForDial.func1()
      /home/fwkadmin/.ift/import/content/go-1.21.1-bin-linuxx86_64/go/src/net/http/transport.go:1436 +0x44
==================

[jeevatkm]

@1713266 I think, possibly, the data race is caused by the release buffer method; it has been fixed in #745; could you please check and let me know the outcome?

[1713266]

@jeevatkm Since our upgrade to Resty 2.11.0, nothing like this has been observed again. I will close the issue.