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| author | Colin Ian King <colin.king@canonical.com> | 2019-06-27 10:05:41 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-07-23 14:49:17 +0200 |
| commit | b98fd3cb6db8dbba6377c41a66c6b673f9d93da3 (patch) | |
| tree | cb8b308efdfaf21d6e2ba562d1487692ad53efa2 /drivers/media/platform | |
| parent | media: drivers/media: don't set pix->priv = 0 (diff) | |
| download | linux-b98fd3cb6db8dbba6377c41a66c6b673f9d93da3.tar.xz linux-b98fd3cb6db8dbba6377c41a66c6b673f9d93da3.zip | |
media: vivid: fix potential integer overflow on left shift
There is a potential integer overflow when int 2 is left shifted
as this is evaluated using 32 bit arithmetic but is being used in
a context that expects an expression of type s64. Fix this by
generating a mask using GENMASK to avoid a 32 bit overflow.
Addresses-Coverity: ("Unintentional integer overflow")
Fixes: 8a99e9faa131 ("media: vivid: add HDMI (dis)connect RX emulation")
Fixes: 79a792dafac6 ("media: vivid: add HDMI (dis)connect TX emulation")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'drivers/media/platform')
| -rw-r--r-- | drivers/media/platform/vivid/vivid-ctrls.c | 24 |
1 files changed, 12 insertions, 12 deletions
diff --git a/drivers/media/platform/vivid/vivid-ctrls.c b/drivers/media/platform/vivid/vivid-ctrls.c index 3e916c8befb7..fb9220e4e640 100644 --- a/drivers/media/platform/vivid/vivid-ctrls.c +++ b/drivers/media/platform/vivid/vivid-ctrls.c @@ -1613,6 +1613,8 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap, } if (dev->num_hdmi_inputs) { + s64 hdmi_input_mask = GENMASK(dev->num_hdmi_inputs - 1, 0); + dev->ctrl_dv_timings_signal_mode = v4l2_ctrl_new_custom(hdl_vid_cap, &vivid_ctrl_dv_timings_signal_mode, NULL); @@ -1633,12 +1635,13 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap, V4L2_CID_DV_RX_RGB_RANGE, V4L2_DV_RGB_RANGE_FULL, 0, V4L2_DV_RGB_RANGE_AUTO); dev->ctrl_rx_power_present = v4l2_ctrl_new_std(hdl_vid_cap, - NULL, V4L2_CID_DV_RX_POWER_PRESENT, 0, - (2 << (dev->num_hdmi_inputs - 1)) - 1, 0, - (2 << (dev->num_hdmi_inputs - 1)) - 1); + NULL, V4L2_CID_DV_RX_POWER_PRESENT, 0, hdmi_input_mask, + 0, hdmi_input_mask); } if (dev->num_hdmi_outputs) { + s64 hdmi_output_mask = GENMASK(dev->num_hdmi_outputs - 1, 0); + /* * We aren't doing anything with this at the moment, but * HDMI outputs typically have this controls. @@ -1652,17 +1655,14 @@ int vivid_create_controls(struct vivid_dev *dev, bool show_ccs_cap, dev->ctrl_display_present = v4l2_ctrl_new_custom(hdl_vid_out, &vivid_ctrl_display_present, NULL); dev->ctrl_tx_hotplug = v4l2_ctrl_new_std(hdl_vid_out, - NULL, V4L2_CID_DV_TX_HOTPLUG, 0, - (2 << (dev->num_hdmi_outputs - 1)) - 1, 0, - (2 << (dev->num_hdmi_outputs - 1)) - 1); + NULL, V4L2_CID_DV_TX_HOTPLUG, 0, hdmi_output_mask, + 0, hdmi_output_mask); dev->ctrl_tx_rxsense = v4l2_ctrl_new_std(hdl_vid_out, - NULL, V4L2_CID_DV_TX_RXSENSE, 0, - (2 << (dev->num_hdmi_outputs - 1)) - 1, 0, - (2 << (dev->num_hdmi_outputs - 1)) - 1); + NULL, V4L2_CID_DV_TX_RXSENSE, 0, hdmi_output_mask, + 0, hdmi_output_mask); dev->ctrl_tx_edid_present = v4l2_ctrl_new_std(hdl_vid_out, - NULL, V4L2_CID_DV_TX_EDID_PRESENT, 0, - (2 << (dev->num_hdmi_outputs - 1)) - 1, 0, - (2 << (dev->num_hdmi_outputs - 1)) - 1); + NULL, V4L2_CID_DV_TX_EDID_PRESENT, 0, hdmi_output_mask, + 0, hdmi_output_mask); } if ((dev->has_vid_cap && dev->has_vid_out) || (dev->has_vbi_cap && dev->has_vbi_out)) |