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    • Jeff Vander Stoep's avatar
      c7e6074c
      Create unique labels for /dev/snd/{seq,timer} · c7e6074c
      Jeff Vander Stoep authored
      No core android component needs access to /dev/snd/{seq,timer}, but
      currently audioserver, bootanim, init, system_server and ueventd have
      access. Seq and timer have been the source of many bugs in the past
      [1]. Giving these files new labels without explicitly granting access
      removes access from audioserver, bootanim, and system_server.
      Init and ueventd still require access for /dev setup.
      
      TODO: Explore unsetting CONFIG_SND_TIMER device kernels.
      
      [1] https://github.com/google/syzkaller/wiki/Found-Bugs
      
      Test: media CTS "cts-tradefed run cts -m CtsMediaTestCases" on Bullhead
      and Dragon completed with no denials.
      
      Bug: 29045223
      (cherry picked from commit db4510d8)
      Change-Id: I2d069920e792ce8eef70c7b4a038b9e7000f39f5
      c7e6074c
      History
      Create unique labels for /dev/snd/{seq,timer}
      Jeff Vander Stoep authored
      No core android component needs access to /dev/snd/{seq,timer}, but
      currently audioserver, bootanim, init, system_server and ueventd have
      access. Seq and timer have been the source of many bugs in the past
      [1]. Giving these files new labels without explicitly granting access
      removes access from audioserver, bootanim, and system_server.
      Init and ueventd still require access for /dev setup.
      
      TODO: Explore unsetting CONFIG_SND_TIMER device kernels.
      
      [1] https://github.com/google/syzkaller/wiki/Found-Bugs
      
      Test: media CTS "cts-tradefed run cts -m CtsMediaTestCases" on Bullhead
      and Dragon completed with no denials.
      
      Bug: 29045223
      (cherry picked from commit db4510d8)
      Change-Id: I2d069920e792ce8eef70c7b4a038b9e7000f39f5