RESOLVED FIXED 200009
Correct web audio-related crash in seed reports 
https://bugs.webkit.org/show_bug.cgi?id=200009
Summary Correct web audio-related crash in seed reports
Brent Fulgham
Reported 2019-07-22 12:36:01 PDT
We removed access to the Audio Processing Tap XPC service in our iOS 13 work because our testing did not show it being used in normal browsing tests. Unfortunately, it is used in some web audio cases (and games). This patch makes two changes: (1) It restores access to the "com.apple.coremedia.audioprocessingtap.xpc" XPC service. (2) It checks the return value of MTAudioProcessingTapCreate (which fails when the service is blocked) and returns early to avoid using the invalid audio tap.
Attachments
Patch (4.80 KB, patch)
2019-07-22 13:03 PDT, Brent Fulgham 		no flags
DetailsFormatted DiffDiff
Patch for landing (3.95 KB, patch)
2019-07-22 14:18 PDT, Brent Fulgham 		no flags
DetailsFormatted DiffDiff
Patch for landing (3.62 KB, patch)
2019-07-22 14:20 PDT, Brent Fulgham 		no flags
DetailsFormatted DiffDiff
Show Obsolete (2) View All Add attachment proposed patch, testcase, etc.
Brent Fulgham
Comment 1 2019-07-22 12:36:40 PDT
<rdar://problem/51565203>
Brent Fulgham
Comment 2 2019-07-22 13:03:43 PDT
Created attachment 374622 [details] Patch
Brent Fulgham
Comment 3 2019-07-22 13:30:35 PDT
*** Bug 200012 has been marked as a duplicate of this bug. ***
Per Arne Vollan
Comment 4 2019-07-22 13:57:39 PDT
Comment on attachment 374622 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=374622&action=review R=me. > Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.WebContent.sb:380 > + (global-name "com.apple.coremedia.audioprocessingtap.xpc") ;; <rdar://problem/51565203> I think the explicit allow in not needed, since it is already allowed in the imported sandbox file. > Source/WebKit/WebProcess/com.apple.WebProcess.sb.in:609 > + (global-name "com.apple.coremedia.audioprocessingtap.xpc") ;; <rdar://problem/51565203> Is this needed on macOS?
Brent Fulgham
Comment 5 2019-07-22 14:18:48 PDT
Created attachment 374631 [details] Patch for landing
Brent Fulgham
Comment 6 2019-07-22 14:20:45 PDT
Created attachment 374632 [details] Patch for landing
Alexey Proskuryakov
Comment 7 2019-07-22 14:25:44 PDT
*** Bug 200012 has been marked as a duplicate of this bug. ***
WebKit Commit Bot
Comment 8 2019-07-22 15:03:04 PDT
Comment on attachment 374632 [details] Patch for landing Clearing flags on attachment: 374632 Committed r247701: <https://trac.webkit.org/changeset/247701>
WebKit Commit Bot
Comment 9 2019-07-22 15:03:06 PDT
All reviewed patches have been landed. Closing bug.
Note You need to log in before you can comment on or make changes to this bug.