5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ruoyu Wang [ Upstream commit 0735e0b5a96761a9ce277a238e834008ad92a0a5 ] zoran_init_video_device() installs zoran_vdev_release() as the video_device release callback through zoran_template. After video_register_device() succeeds, video_unregister_device() drops the registered video_device reference and the V4L2 core eventually invokes that release callback, which kfree()s the video_device. zoran_exit_video_devices() called video_unregister_device() and then kfree(zr->video_dev), so device teardown could free the same video_device twice. Remove the direct kfree() and clear the cached pointer after unregistering. The pre-registration failure path keeps its manual free because the video_device was not registered there. This issue was found by a static analysis checker and confirmed by manual source review. Fixes: 82e3a496eb56 ("media: staging: media: zoran: move videodev alloc") Cc: stable@vger.kernel.org Signed-off-by: Ruoyu Wang Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin --- drivers/staging/media/zoran/zoran_card.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/staging/media/zoran/zoran_card.c b/drivers/staging/media/zoran/zoran_card.c index 11d415c0c05d2..b6a9fef71ba2e 100644 --- a/drivers/staging/media/zoran/zoran_card.c +++ b/drivers/staging/media/zoran/zoran_card.c @@ -832,7 +832,7 @@ static int zoran_init_video_device(struct zoran *zr, struct video_device *video_ static void zoran_exit_video_devices(struct zoran *zr) { video_unregister_device(zr->video_dev); - kfree(zr->video_dev); + zr->video_dev = NULL; } static int zoran_init_video_devices(struct zoran *zr) -- 2.53.0