SetAlternateDesktop failure should not crash the browser.

RESOLVED FIXED in Firefox 60

Status

()

Product:
Core
Component:
Security: Process Sandboxing
Type:
defect
Importance:
P1
normal
Status:
RESOLVED FIXED
Opened:
Last year
Updated:
Last year

People

(Reporter: bobowen, Assigned: bobowen)

Tracking

Version:
60 Branch
Target:
mozilla61
Platform:
All
Windows
Points:
---
Dependency tree / graph

Firefox Tracking Flags

(firefox-esr52 unaffected, firefox59 disabled, firefox60+ fixed, firefox61 fixed)

Details

(crash signature)

Attachments

(1 attachment)

Only warn when SetAlternateDesktop fails
3.72 KB, patch
jimm
: review+
jcristau
: approval-mozilla-beta+
Details | Diff | Splinter Review 
Currently failure to create an alternate desktop will crash the browser.
It looks like there are cases where this can legitimately fail and certainly chrome only warns.
Attachment #8958806 - Flags: review?(jmathies)
Attachment #8958806 - Flags: review?(jmathies) → review+
Try push (this time actually calling GetLastError instead of logging its pointer):
https://treeherder.mozilla.org/#/jobs?repo=try&revision=816edb8ff6b2ebd7c4d3b5c824564746bc43fe28
Pushed by bobowencode@gmail.com:
https://hg.mozilla.org/integration/mozilla-inbound/rev/159e1105bdc7
Only warn when SetAlternateDesktop fails. r=jimm
Comment on attachment 8958806 [details] [diff] [review]
Only warn when SetAlternateDesktop fails

Sheriff note: the patch that landed was slightly different to the one attached to the bug.

Approval Request Comment
[Feature/Bug causing the regression]:
Alternate Desktop for content process bug 1441824.

[User impact if declined]:
Some users will continue to experience crashes like this:
https://crash-stats.mozilla.com/search/?moz_crash_reason=~alternate desktop&product=Firefox

[Is this code covered by automated tests?]:
Many tests go through the child process launch code.

[Has the fix been verified in Nightly?]:
I don't have STR.

[Needs manual test from QE? If yes, steps to reproduce]: 
No STR, but should be obvious from crash stats.

[List of other uplifts needed for the feature/fix]:
None

[Is the change risky?]:
No

[Why is the change risky/not risky?]:
Trivial change to warn and log instead of crash the browser or not start the child.

[String changes made/needed]:
None
Attachment #8958806 - Flags: approval-mozilla-beta?
Crash Signature: [@ mozilla::SandboxBroker::SetSecurityLevelForContentProcess]
https://hg.mozilla.org/mozilla-central/rev/159e1105bdc7
Status: ASSIGNED → RESOLVED
Closed: Last year
status-firefox61: affected → fixed
Resolution: --- → FIXED
Target Milestone: --- → mozilla61
Comment on attachment 8958806 [details] [diff] [review]
Only warn when SetAlternateDesktop fails

windows crash fix for beta60
Attachment #8958806 - Flags: approval-mozilla-beta? → approval-mozilla-beta+
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