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Merge "asoc: codecs: wcd938x: limit buffer copy to max buffer size"

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qctecmdr 2019-10-06 11:49:21 -07:00 • committed by Gerrit - the friendly Code Review server
commit ae5dca4830
1 changed files with 2 additions and 2 deletions
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4
asoc/codecs/wcd938x/wcd938x-slave.c
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@ -112,9 +112,9 @@ static ssize_t wcd938x_swrslave_reg_show(struct swr_device *pdev,
if (!is_swr_slv_reg_readable(i))
continue;
swr_read(pdev, pdev->dev_num, i, &reg_val, 1);
len = snprintf(tmp_buf, 25, "0x%.3x: 0x%.2x\n", i,
len = snprintf(tmp_buf, sizeof(tmp_buf), "0x%.3x: 0x%.2x\n", i,
(reg_val & 0xFF));
if ((total + len) >= count - 1)
if (((total + len) >= count - 1) || (len < 0))
break;
if (copy_to_user((ubuf + total), tmp_buf, len)) {
pr_err("%s: fail to copy reg dump\n", __func__);