Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit be317127 authored by Vishnuvardhan Prodduturi's avatar Vishnuvardhan Prodduturi
Browse files

disp: msm: dsi: add check before buffer copy 



This change adds a check for the length of the buffer
before copying it to avoid a buffer overflow.

Change-Id: I146895660be4060d9896706636257a57c6aef94f
Signed-off-by: default avatarVishnuvardhan Prodduturi <vproddut@codeaurora.org>
parent 55b46911

drivers/gpu/drm/msm/dsi-staging/dsi_ctrl.c

+2 −3
Original line number Diff line number Diff line
@@ -118,7 +118,7 @@ static ssize_t debugfs_state_info_read(struct file *file, 
			dsi_ctrl->clk_freq.pix_clk_rate,

			dsi_ctrl->clk_freq.esc_clk_rate);



	/* TODO: make sure that this does not exceed 4K */

	len = min_t(size_t, len, SZ_4K);

	if (copy_to_user(buff, buf, len)) {

		kfree(buf);

		return -EFAULT;
@@ -173,8 +173,7 @@ static ssize_t debugfs_reg_dump_read(struct file *file, 
		return rc;

	}





	/* TODO: make sure that this does not exceed 4K */

	len = min_t(size_t, len, SZ_4K);

	if (copy_to_user(buff, buf, len)) {

		kfree(buf);

		return -EFAULT;