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media: bdisp: fix memleak on release

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commit 11609a7e21f8cea42630350aa57662928fa4dc63 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold 2019-10-10 10:13:31 -03:00 • committed by Greg Kroah-Hartman
commit 733c4d12e9
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);