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authorPi-Hsun Shih <pihsun@chromium.org>2019-11-10 07:29:10 +0100
committerMauro Carvalho Chehab <mchehab@kernel.org>2019-11-10 07:29:10 +0100
commitdf4a3e7f88e3b0d7ae46d70b9ff8e3c0ea730785 (patch)
treea5d2f4308b8536a97e704d63af4addfbdee99d26 /drivers/staging/media/sunxi/cedrus/cedrus_regs.h
parent2df200ab234a86836a8879a05a8007d6b884eb14 (diff)
media: v4l2-ctrl: Lock main_hdl on operations of requests_queued.
There's a race condition between the list_del_init in the v4l2_ctrl_request_complete, and the list_add_tail in the v4l2_ctrl_request_queue, since they can be called in different thread and the requests_queued list is not protected by a lock. This can lead to that the v4l2_ctrl_handler is still in the requests_queued list while the request_is_queued is already set to false, which would cause use-after-free if the v4l2_ctrl_handler is later released. Fix this by locking the ->lock of main_hdl (which is the owner of the requests_queued list) when doing list operations on the ->requests_queued list. Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Diffstat (limited to 'drivers/staging/media/sunxi/cedrus/cedrus_regs.h')
0 files changed, 0 insertions, 0 deletions

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