CBL-8733: Pusher UAF in ChangesFeed's DB-change observer - #2530
Merged
Conversation
The root cause is that the changes notifier is not timely removed from the SequenceTracker. We remove it whent the status turns to Stoppped. The removal and the use of the notifier callback are under Collection's lock on the SequenceTracker; the removal has to wait for the callback to complete.
|
This is a release branch and commits are restricted. Please confirm this PR is one of the following:
|
|
Code Coverage Results:
|
pasin
approved these changes
Aug 24, 2026
pasin
left a comment
Collaborator
There was a problem hiding this comment.
Can you select the reason as well?
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The root cause is that the changes notifier is not timely removed from the SequenceTracker. We remove it whent the status turns to Stoppped.
The removal and the use of the notifier callback are under Collection's lock on the SequenceTracker; the removal has to wait for the callback to complete.