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Commit 5e1b0c50 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "drm/msm : check buffer size before writing to user buffer" into dev/msm-4.14-display

parents 80076a70 b569d761

drivers/gpu/drm/msm/sde_dbg.c

+5 −0
Original line number Original line Diff line number Diff line
@@ -4046,6 +4046,11 @@ static ssize_t sde_evtlog_dump_read(struct file *file, char __user *buff, 




	len = sde_evtlog_dump_to_buffer(sde_dbg_base.evtlog, evtlog_buf,

	len = sde_evtlog_dump_to_buffer(sde_dbg_base.evtlog, evtlog_buf,

			SDE_EVTLOG_BUF_MAX, true);

			SDE_EVTLOG_BUF_MAX, true);

	if (len < 0 || len > count) {

		pr_err("len is more than user buffer size");

		return 0;

	}



	if (copy_to_user(buff, evtlog_buf, len))

	if (copy_to_user(buff, evtlog_buf, len))

		return -EFAULT;

		return -EFAULT;

	*ppos += len;

	*ppos += len;