[Webkit-unassigned] [Bug 143144] New: Null dereference in InbandMetadataTextTrack handling

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=143144

            Bug ID: 143144
           Summary: Null dereference in InbandMetadataTextTrack handling
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Media Elements
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: bfulgham at webkit.org

We've seen some crashes due to a null dereference in InbandMetadataTextTrackAVF::updatePendingCueEndTimes. Reviewing the code, I notice that the client() return value is used without null check, even though the other methods in this class due check for null.

This patch adds a null check for client()'s return value to avoid this crash.

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