From eeb88df1d501ccec4737c18dddb7ca0a1176304f Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Fri, 9 Apr 2021 13:10:03 +0200
Subject: Added readable/writable checks

---
 kernel/drivers/fb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'kernel/drivers')

diff --git a/kernel/drivers/fb.c b/kernel/drivers/fb.c
index 3e333e8..78b3984 100644
--- a/kernel/drivers/fb.c
+++ b/kernel/drivers/fb.c
@@ -37,7 +37,7 @@ static res fb_ioctl(u32 request, void *arg1, void *arg2, void *arg3, struct devi
 		if (!info)
 			return -ENOENT;
 
-		if (!arg1 || !memory_valid(arg1))
+		if (!arg1 || !memory_writable(arg1))
 			return -EFAULT;
 
 		if (fb_owner != 0 && proc_from_pid(fb_owner))
-- 
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