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winlogbeat/sys/wineventlog: don't use claimed buffer use value #35437

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merged 1 commit into from
May 12, 2023

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@efd6 efd6 commented May 12, 2023

What does this PR do?

EvtFormatMessage appears to sometimes claim that more buffer was used during a rendering call than was or exists, so do not use this value except in the query to get the needed buffer size.

It is a subset of the change in #34005. The remainder of the removal of the passed buffer is left for later work.

Why is it important?

Winlogbeat will sometimes panic due to a bounds error.

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  • My code follows the style guidelines of this project
  • I have commented my code, particularly in hard-to-understand areas
  • I have made corresponding changes to the documentation
  • I have made corresponding change to the default configuration files
  • I have added tests that prove my fix is effective or that my feature works
  • I have added an entry in CHANGELOG.next.asciidoc or CHANGELOG-developer.next.asciidoc.

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@efd6 efd6 added bug Winlogbeat 8.9-candidate backport-v8.8.0 Automated backport with mergify labels May 12, 2023
@efd6 efd6 self-assigned this May 12, 2023
@botelastic botelastic bot added the needs_team Indicates that the issue/PR needs a Team:* label label May 12, 2023
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@efd6 efd6 force-pushed the s3380-winlogbeat branch from ea1afe3 to 56fbdfb Compare May 12, 2023 05:13
EvtFormatMessage appears to sometimes claim that more buffer was used
during a rendering call than was or exists, so do not use this value
except in the query to get the needed buffer size.
@efd6 efd6 force-pushed the s3380-winlogbeat branch from 56fbdfb to 058d298 Compare May 12, 2023 05:44
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elasticmachine commented May 12, 2023

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  • Start Time: 2023-05-12T05:44:47.870+0000

  • Duration: 70 min 24 sec

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@efd6 efd6 marked this pull request as ready for review May 12, 2023 06:25
@efd6 efd6 requested a review from a team as a code owner May 12, 2023 06:25
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LGTM

@efd6 efd6 merged commit fd7b89c into elastic:main May 12, 2023
mergify bot pushed a commit that referenced this pull request May 12, 2023
EvtFormatMessage appears to sometimes claim that more buffer was used
during a rendering call than was or exists, so do not use this value
except in the query to get the needed buffer size.

(cherry picked from commit fd7b89c)
efd6 added a commit that referenced this pull request May 14, 2023
… (#35442)

EvtFormatMessage appears to sometimes claim that more buffer was used
during a rendering call than was or exists, so do not use this value
except in the query to get the needed buffer size.

(cherry picked from commit fd7b89c)

Co-authored-by: Dan Kortschak <[email protected]>
chrisberkhout pushed a commit that referenced this pull request Jun 1, 2023
EvtFormatMessage appears to sometimes claim that more buffer was used
during a rendering call than was or exists, so do not use this value
except in the query to get the needed buffer size.
@reakaleek reakaleek mentioned this pull request Jul 19, 2023
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3 participants