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media: bdisp: fix memleak on release 

If a process is interrupted while accessing the video device and the
device lock is contended, release() could return early and fail to free
related resources.

Note that the return value of the v4l2 release file operation is
ignored.

Fixes: 28ffeebbb7 ("[media] bdisp: 2D blitter driver using v4l2 mem2mem framework")
Cc: stable <stable@vger.kernel.org>     # 4.2
Signed-off-by: Johan Hovold <johan@kernel.org>
Reviewed-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
alistair/sunxi64-5.5-dsi
Johan Hovold 2019-10-10 10:13:31 -03:00 committed by Mauro Carvalho Chehab
parent d973933858
commit 11609a7e21
1 changed files with 1 additions and 2 deletions
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3
drivers/media/platform/sti/bdisp/bdisp-v4l2.c
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@ -651,8 +651,7 @@ static int bdisp_release(struct file *file)
dev_dbg(bdisp->dev, "%s\n", __func__);
if (mutex_lock_interruptible(&bdisp->lock))
return -ERESTARTSYS;
mutex_lock(&bdisp->lock);
v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);