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64 lines
2.0 KiB
Diff
64 lines
2.0 KiB
Diff
From ba3f404a10b3bb7e9c20440837df3cd35c5d0c4b Mon Sep 17 00:00:00 2001
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From: Ayaz Ahmad <aahmad@codeaurora.org>
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Date: Thu, 31 Oct 2013 19:08:05 +0530
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Subject: radio: iris: Prevent probable overflow
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casting a unsigned int into an integer, integer to
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unsigned int may cause buffer overflow.
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Change-Id: I54be4d4c5470616a59a772c587fe6d5f32575c32
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CRs-Fixed: 539008
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Signed-off-by: Ayaz Ahmad <aahmad@codeaurora.org>
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---
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drivers/media/radio/radio-iris.c | 14 ++++++++++----
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1 file changed, 10 insertions(+), 4 deletions(-)
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diff --git a/drivers/media/radio/radio-iris.c b/drivers/media/radio/radio-iris.c
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index bfb1088..12fd7cf 100644
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--- a/drivers/media/radio/radio-iris.c
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+++ b/drivers/media/radio/radio-iris.c
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@@ -3032,7 +3032,7 @@ static int iris_vidioc_s_ext_ctrls(struct file *file, void *priv,
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struct v4l2_ext_controls *ctrl)
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{
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int retval = 0;
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- int bytes_to_copy;
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+ size_t bytes_to_copy;
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struct hci_fm_tx_ps tx_ps;
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struct hci_fm_tx_rt tx_rt;
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struct hci_fm_def_data_wr_req default_data;
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@@ -3041,14 +3041,20 @@ static int iris_vidioc_s_ext_ctrls(struct file *file, void *priv,
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struct iris_device *radio = video_get_drvdata(video_devdata(file));
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char *data = NULL;
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+ if ((ctrl == NULL) || (ctrl->controls == NULL)
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+ || (ctrl->count == 0)) {
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+ retval = -EINVAL;
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+ return retval;
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+ }
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+
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switch ((ctrl->controls[0]).id) {
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case V4L2_CID_RDS_TX_PS_NAME:
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FMDBG("In V4L2_CID_RDS_TX_PS_NAME\n");
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/*Pass a sample PS string */
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memset(tx_ps.ps_data, 0, MAX_PS_LENGTH);
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- bytes_to_copy = min((int)(ctrl->controls[0]).size,
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- MAX_PS_LENGTH);
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+ bytes_to_copy = min_t(size_t, ctrl->controls[0].size,
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+ MAX_PS_LENGTH);
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data = (ctrl->controls[0]).string;
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if (copy_from_user(tx_ps.ps_data,
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@@ -3065,7 +3071,7 @@ static int iris_vidioc_s_ext_ctrls(struct file *file, void *priv,
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break;
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case V4L2_CID_RDS_TX_RADIO_TEXT:
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bytes_to_copy =
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- min((int)(ctrl->controls[0]).size, MAX_RT_LENGTH);
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+ min_t(size_t, (ctrl->controls[0]).size, MAX_RT_LENGTH);
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data = (ctrl->controls[0]).string;
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memset(tx_rt.rt_data, 0, MAX_RT_LENGTH);
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--
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cgit v1.1
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