From: Antonino A. Daplas <adaplas@gmail.com>
Date: Wed, 14 Sep 2005 21:19:15 +0000 (-0700)
Subject: [PATCH] nv_i2c oops fix
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=0ed8e048c9e11e69ec951f94066105e80cdc59fd;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[PATCH] nv_i2c oops fix

The call to fb_firmware_edid may return NULL but this is not checked before
trying to memcpy using this pointer.

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/drivers/video/nvidia/nv_i2c.c b/drivers/video/nvidia/nv_i2c.c
index ace484fa61ce..12f2884d3f0b 100644
--- a/drivers/video/nvidia/nv_i2c.c
+++ b/drivers/video/nvidia/nv_i2c.c
@@ -209,10 +209,13 @@ int nvidia_probe_i2c_connector(struct fb_info *info, int conn, u8 **out_edid)
 
 	if (!edid && conn == 1) {
 		/* try to get from firmware */
-		edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
-		if (edid)
-			memcpy(edid, fb_firmware_edid(info->device),
-			       EDID_LENGTH);
+		const u8 *e = fb_firmware_edid(info->device);
+
+		if (e != NULL) {
+			edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
+			if (edid)
+				memcpy(edid, e, EDID_LENGTH);
+		}
 	}
 
 	if (out_edid)