[PATCH] fix a copy_user return

da602a16 · Alan Cox · Linus Torvalds · ef1c3837 · da602a16
Commit da602a16 authored Jul 17, 2003 by Alan Cox Committed by Linus Torvalds Jul 17, 2003
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fs/proc/proc_misc.c fs/proc/proc_misc.c +2 -1

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--- a/fs/proc/proc_misc.c
+++ b/fs/proc/proc_misc.c
@@ -536,7 +536,8 @@ static ssize_t read_profile(struct file *file, char *buf,
 		buf++; p++; count--; read++;
 	}
 	pnt = (char *)prof_buffer + p - sizeof(unsigned int);
-	copy_to_user(buf,(void *)pnt,count);
+	if(copy_to_user(buf,(void *)pnt,count))
+		return -EFAULT;
 	read += count;
 	*ppos += read;
 	return read;