From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Tue, 17 Oct 2017 23:43:43 +0300
Subject: drm/bridge: adv7511: Fix a use after free
Git-commit: 8b32948690946e89c198e44f8a1252295473f348
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
We free "edid", then use it again on the next line.
Fixes: 3b1b975003e4 ("drm: adv7511/33: add HDMI CEC support")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20171017204343.zctliubjkq7imudi@mwanda
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -607,10 +607,10 @@ static int adv7511_get_modes(struct adv7
adv7511_set_config_csc(adv7511, connector, adv7511->rgb,
drm_detect_hdmi_monitor(edid));
- kfree(edid);
-
cec_s_phys_addr_from_edid(adv7511->cec_adap, edid);
+ kfree(edid);
+
return count;
}