[M148] [remoting] Fix Use-after-Free in WebrtcVideoRendererAdapter [chromium/src : refs/branch-heads/7778]

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Change information

Commit message:

[M148] [remoting] Fix Use-after-Free in WebrtcVideoRendererAdapter

Original change's description:
> [remoting] Fix Use-after-Free in WebrtcVideoRendererAdapter
>
> WebrtcVideoRendererAdapter registered itself as a sink on the first
> track of a MediaStream but was re-querying the stream for its first
> track during destruction. If the tracks were changed via SDP
> renegotiation, it could unregister from the wrong track, leaving a
> dangling pointer in the original track.
>
> This CL fixes the issue by caching the track the adapter is registered
> on and using that cached track for unregistration in the destructor
> and in SetMediaStream.
>
> Bug: 501722605
> Change-Id: I5adf5b2acdc1c60095892f549ac65aa9d74e7cdc
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7757703
> Reviewed-by: Yuwei Huang <yuw...@chromium.org>
> Commit-Queue: Joe Downing <joe...@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1613974}

(cherry picked from commit 2fb4251778d90fe19c011a207c009a39db2e9fa1)

Bug: 503210983,501722605

Change-Id: I5adf5b2acdc1c60095892f549ac65aa9d74e7cdc

Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/7791710

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Cr-Commit-Position: refs/branch-heads/7778@{#1498}

Cr-Branched-From: 77f495ee216d4c3cc784d33658bad4778c0680ee-refs/heads/main@{#1610480}

Files:

• M remoting/protocol/BUILD.gn
• M remoting/protocol/webrtc_video_renderer_adapter.cc
• M remoting/protocol/webrtc_video_renderer_adapter.h
• A remoting/protocol/webrtc_video_renderer_adapter_unittest.cc

Change size: M

Delta: 4 files changed, 120 insertions(+), 11 deletions(-)

Branch: refs/branch-heads/7778

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Gerrit-Change-Id: I5adf5b2acdc1c60095892f549ac65aa9d74e7cdc

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