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[ Upstream commit 42bcaacae924bf18ae387c3f78c202df0b739292 ] When cec_release() uses fh->msgs it has to take fh->lock, otherwise the list can get corrupted. Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Reported-by: Yang, Chenyuan <cy54@illinois.edu> Closes: https://lore.kernel.org/linux-media/PH7PR11MB57688E64ADE4FE82E658D86DA09EA@PH7PR11MB5768.namprd11.prod.outlook.com/ Fixes: ca684386e6e2 ("[media] cec: add HDMI CEC framework (api)") Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> (cherry picked from commit d2cfbc5298add5e0c6cfe8b343f73dfdf01c8b1c) Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com>