1936223 - Blocked dialog displayed when pasting from clipboard after canceling the initial DLP scan

Status: VERIFIED FIXED

(Firefox :: Data Loss Prevention, defect)

Description

[Bianca Hidecuti, Desktop Test Engineering [:bhidecuti]]

Attachment: video showing the issue

Found in

• 135.0a1 (2024-12-09)

Affected versions

• 135.0a1
• 134.0b8

Preconditions

• Download the DLP test assets from https://drive.google.com/file/d/1yjqVRuxdKV3WnO7D2wzMgDXBuYBxUgVw/view
• Create a distribution folder inside the Firefox folder and paste the policies-1.json to it and then rename it to policies.json
• Run the DLP agent in CMD using: .\content_analysis_sdk_agent.exe --user --toblock=.\d{3}-?\d{2}-?\d{4}. --towarn=.warn. --delays=10

Tested platforms

• Affected platforms: Windows 10/11
• Unaffected platforms: macOS, Ubuntu

Steps to reproduce

1. Go to any random webpage (e.g. wikipedia.org)
2. Copy any random text and paste it inside the Search field
3. Press the “Cancel” button from the “Scan in progress” dialog
4. Paste again the content from the clipboard and observe the behavior

Expected result

• “Scan in progress” dialog is displayed

Actual result

• “You’re not permitted to paste this content” dialog is displayed

Regression range

• Mozregression points to bug 1915351

Additional notes

• See the attached video
• Reproducing regardless of the pasted text

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

:gstoll, since you are the author of the regressor, bug 1915351, could you take a look? Also, could you set the severity field?

For more information, please visit BugBot documentation.

Comment 2

[Greg Stoll :gstoll]

Attachment: Bug 1936223 - don't use content analysis cache for full clipboard pastes r=#dlp-reviewers!

After bug 1918027 and bug 1915351 we don't need the cache for
full clipboard pastes anymore, and using it leads to some inconsistent
behavior like in this bug.

Comment 3

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/2ff5e9be6f5f
don't use content analysis cache for full clipboard pastes r=dlp-reviewers,handyman

Comment 4

[amarc]

https://hg.mozilla.org/mozilla-central/rev/2ff5e9be6f5f

Comment 5

[Bianca Hidecuti, Desktop Test Engineering [:bhidecuti]]

Verified as fixed using Firefox Nightly 135.0a1 (2024-12-12), on Windows 10/11. Blocked dialog is no longer displayed when pasting from clipboard after canceling the initial DLP scan.