Closed Bug 1778747 Opened 2 years ago Closed 2 years ago

Crash when accessing 'print_printer' preference in Content Process with blocklisted preferences.

Categories

(Core :: Preferences: Backend, defect)

Product:
Core
Component:
Preferences: Backend
Version:
Firefox 104
Type:
defect

Tracking

()

Status:
VERIFIED FIXED
Milestone:
104 Branch
Tracking Flags:
Tracking Status
firefox104 --- verified

People

(Reporter: djackson, Assigned: tjr)

References

Details

Attachments

(1 file)

Bug 1778747: Allowlist the other, very similar, printer preference tree r?jwatt
48 bytes, text/x-phabricator-request
Details | Review

I was able to reliably crash the content process when navigating to print-friendly pages. I tested on Gmail and https://esta.cbp.dhs.gov. In both cases, after selecting the Print Preview icon, the page loaded correctly but then when the Printer dialog should have appeared, the content process crashed.

Disabling the experimental preferences resolved the crash:

  • fission.enforceBlocklistedPrefsInSubprocesses
  • fission.enforceBlocklistedPrefsInSubprocesses.tmp
  • fission.omitBlocklistedPrefsInSubprocesses
  • fission.omitBlocklistedPrefsInSubprocesses.tmp

Crash Reports:

Component: Security → Security: Process Sandboxing
Product: Firefox → Core
Blocks: 1708798
Component: Security: Process Sandboxing → Preferences: Backend
Blocks: 1749598, 1752333
No longer blocks: 1708798
Assignee: nobody → tom
Status: NEW → ASSIGNED
Pushed by tritter@mozilla.com:
https://hg.mozilla.org/integration/autoland/rev/709e57b20c53
Allowlist the other, very similar, printer preference tree r=jwatt

https://hg.mozilla.org/mozilla-central/rev/709e57b20c53

Status: ASSIGNED → RESOLVED
Closed: 2 years ago
status-firefox104: affected → fixed
Resolution: --- → FIXED
Target Milestone: --- → 104 Branch
Flags: qe-verify+

I was able to reproduce the crash using an old Nightly from 2022-07-08 https://crash-stats.mozilla.org/report/index/096ddc3d-cc2e-427d-b05c-4cb170220804, verified that using latest Firefox 104.0b5 I don't get a crash anymore across platforms (Windows 10 64bit, macOS 11.6 and Ubuntu 18.04).

Status: RESOLVED → VERIFIED
status-firefox104: fixed → verified
Flags: qe-verify+
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