From: Antonino A. Daplas <adaplas@gmail.com>
Date: Sat, 11 Mar 2006 11:27:23 +0000 (-0800)
Subject: [PATCH] arcfb: Fix dereference before NULL check
X-Git-Tag: firefly_0821_release~37688
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=939205b27312b7d7c4c55624ba785e554b39ecbb;p=firefly-linux-kernel-4.4.55.git

[PATCH] arcfb: Fix dereference before NULL check

info->par is dereferenced before info is checked for NULL. Fix.

Coverity Bug 833

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/arcfb.c b/drivers/video/arcfb.c
index 0cf26da75b6d..466042808daf 100644
--- a/drivers/video/arcfb.c
+++ b/drivers/video/arcfb.c
@@ -459,11 +459,11 @@ static ssize_t arcfb_write(struct file *file, const char __user *buf, size_t cou
 	inode = file->f_dentry->d_inode;
 	fbidx = iminor(inode);
 	info = registered_fb[fbidx];
-	par = info->par;
 
 	if (!info || !info->screen_base)
 		return -ENODEV;
 
+	par = info->par;
 	xres = info->var.xres;
 	fbmemlength = (xres * info->var.yres)/8;