[receiver/windowseventlog] Panics due to nil pointer on resize error

[cpheps]

Component(s)

receiver/windowseventlog

What happened?

Description

If evtRender returns an ErrorInsufficientBuffer error it returns a nil pointer for bufferUsed rather than a pointer to bufferUsed.

If the call to evtRender returns an ErrorInsufficientBuffer error in RenderSimple it needs to read the value of the returned bufferUsed in order to resize the buffer.

Steps to Reproduce

Have a windows log message larger than the default buffer size of 16 KiB. This is rare and likely why it doesn't occur very often.

Collector version

v0.66.0

Environment information

Environment

OS: Windows Server 2022

OpenTelemetry Collector configuration

No response

Log output

No response

Additional context

A pointer to bufferUsed should be returned in the case that evtRender has an ErrorInsufficientBuffer error.

[cpheps]

I would like to be assigned to this issue.

[github-actions]

Pinging code owners:

• receiver/windowseventlog: @djaglowski @armstrmi

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