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Subject: V4L/DVB: mx2_camera: fix a race causing NULL dereference Author: Baruch Siach <bar...@tkos.co.il> Date: Tue Jul 27 09:06:07 2010 -0300 The mx25_camera_irq irq handler may get called after the camera has been deactivated (from mx2_camera_deactivate). Detect this situation, and bail out. Signed-off-by: Baruch Siach <bar...@tkos.co.il> Signed-off-by: Guennadi Liakhovetski <g.liakhovet...@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mche...@redhat.com> drivers/media/video/mx2_camera.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) --- http://git.linuxtv.org/media-tree.git?a=commitdiff;h=7fa212423bf5695de4ca26bd9a3852559b09b08d diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c index 66ff174..b6ea672 100644 --- a/drivers/media/video/mx2_camera.c +++ b/drivers/media/video/mx2_camera.c @@ -378,6 +378,9 @@ static void mx25_camera_frame_done(struct mx2_camera_dev *pcdev, int fb, spin_lock_irqsave(&pcdev->lock, flags); + if (*fb_active == NULL) + goto out; + vb = &(*fb_active)->vb; dev_dbg(pcdev->dev, "%s (vb=0x%p) 0x%08lx %d\n", __func__, vb, vb->baddr, vb->bsize); @@ -402,6 +405,7 @@ static void mx25_camera_frame_done(struct mx2_camera_dev *pcdev, int fb, *fb_active = buf; +out: spin_unlock_irqrestore(&pcdev->lock, flags); } _______________________________________________ linuxtv-commits mailing list linuxtv-commits@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/linuxtv-commits
