1597408 - enabling Vorbis decoding on RDD causing sandboxing failure on MinGW-clang

Status: NEW

(Core :: Security: Process Sandboxing, defect, P3)

Description

[Michael Froman [:mjf]]

When trying to enable Vorbis decoding on RDD in Bug 1524049, the following log lines point to a sandbox issue:
https://treeherder.mozilla.org/logviewer.html#/jobs?job_id=276606186&repo=autoland&lineNumber=1314-1316

I pushed a build with the RDD sandbox disabled and the tests pass:
https://treeherder.mozilla.org/#/jobs?repo=try&revision=3d61d1e04b55665af399e0a1df2d0e113aa3141d

Comment 1

[Tom Ritter [:tjr] (OOTO until 4/30 at least)]

I'm going to have to dig into this sometime and figure out what caused mingw to load this dll earlier now

Comment 2

[sanketh]

I am unable to reproduce this bug. I did a try run by disabling the MINGW32 guards (https://treeherder.mozilla.org/#/jobs?repo=try&revision=d27e3194d4858010ff6ac893f953da7650d4a82b&selectedTaskRun=V0ai8hMSSZet3LgeU2oPwg.0) and the build seems to succeed and the built browser seems capable of playing the sample Vorbis video (https://xiph.org/video/vid1.shtml) without any issues.

Tom, can you confirm?

Comment 3

[Tom Ritter [:tjr] (OOTO until 4/30 at least)]

My windows machine is still packed in a box, Michael could you perhaps test again if you have a Windows machine, or perhaps David?

Comment 4

[Michael Froman [:mjf]]

Sorry for the slow response. When I download the target.installer.exe from the Windows MinGW all MinGW-Clang builds for Windows 64-bits build-win64-mingwclang/opt Bo job, I don't see the RDD process running when playing that video.

The short version, I don't believe that push indicates the bug is fixed. Please let me know if I did something incorrectly.

Comment 5

[(Away)]

Sounds like comment 4 took care of this - let me know if not.