Commit 5edff027 authored Nov 23, 2013 by Jayant Shekhar

msm: mdss: Fix NULL pointer dereference in mdss_mdp_display_wait4comp



Add sanity check for ctl to prevent NULL pointer dereference
leading to kernel panic.

CRs-Fixed: 578595
Change-Id: Iace727501856d9f93ba87eca92f9f000c32d2c8f
Signed-off-by: Jayant Shekhar <jshekhar@codeaurora.org>

parent 62dd8456

drivers/video/msm/mdss/mdss_mdp_ctl.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -1806,6 +1806,11 @@ int mdss_mdp_display_wait4comp(struct mdss_mdp_ctl *ctl)
		u32 reg_data, flush_data;
		struct mdss_data_type *mdata = mdss_mdp_get_mdata();

		if (!ctl) {
		pr_err("invalid ctl\n");
		return -ENODEV;
		}

		ret = mutex_lock_interruptible(&ctl->lock);
		if (ret)
		return ret;