evie/android_kernel_oneplus_msm8998
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drm/msm/hdmi-staging: Fix Buffer Overflow

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This change is done to check the size of input before doing the
buffer copy.

Change-Id: I01f8b1f3c3b6e920f186f5f90ea9707bb25bcbbc
Signed-off-by: Rahul Sharma <rahsha@codeaurora.org>
This commit is contained in:
Rahul Sharma 2019-08-02 17:53:22 +05:30
parent fc509761a1
commit 13d43fca0c
1 changed files with 6 additions and 1 deletions
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7
drivers/gpu/drm/msm/hdmi-staging/sde_hdmi.c
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@ -78,7 +78,12 @@ static ssize_t _sde_hdmi_debugfs_dump_info_read(struct file *file,
if (!buf) if (!buf)
return -ENOMEM; return -ENOMEM;
len += snprintf(buf, SZ_4K, "name = %s\n", display->name); len += snprintf(buf, SZ_1K, "name = %s\n", display->name);
if (len > count) {
kfree(buf);
return -ENOMEM;
}
if (copy_to_user(buff, buf, len)) { if (copy_to_user(buff, buf, len)) {
kfree(buf); kfree(buf);