evie/android_kernel_oneplus_msm8998
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i2c-msm-v2: Handle Null pointer de-reference

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Zero message may be passed causing null pointer de-reference.
Adding check on the number of messages passed to handle the issue.

Change-Id: I7cef6dd2070c5eaaa748698c45540f8aa1d96116
Signed-off-by: Vipin Deep Kaur <vkaur@codeaurora.org>
This commit is contained in:
Vipin Deep Kaur 2018-10-08 17:08:43 +05:30 • committed by codeworkx
parent a430609f8f
commit 53d41a76e1
1 changed files with 6 additions and 0 deletions
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6
drivers/i2c/busses/i2c-msm-v2.c
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@ -2330,6 +2330,12 @@ i2c_msm_frmwrk_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
struct i2c_msm_ctrl *ctrl = i2c_get_adapdata(adap);
struct i2c_msm_xfer *xfer = &ctrl->xfer;
if (num < 1) {
dev_err(ctrl->dev,
"error on number of msgs(%d) received\n", num);
return -EINVAL;
}
if (IS_ERR_OR_NULL(msgs)) {
dev_err(ctrl->dev, " error on msgs Accessing invalid pointer location\n");
return PTR_ERR(msgs);