From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@freedesktop.org Subject: [Bug 82455] Failed to allocate virtual address for buffer Date: Mon, 15 Sep 2014 08:25:01 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============0692902244==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 714536E2F3 for ; Mon, 15 Sep 2014 01:25:01 -0700 (PDT) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============0692902244== Content-Type: multipart/alternative; boundary="1410769501.da6B8fD0.3991"; charset="us-ascii" --1410769501.da6B8fD0.3991 Date: Mon, 15 Sep 2014 08:25:01 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=82455 --- Comment #32 from charlie <407883775@qq.com> --- >>radeon: The kernel rejected CS, see dmesg for more information This error is showed in the drm_ioctl function.The part code show as follow: 468 if (cmd & IOC_OUT) { //error place, 469 printk(KERN_EMERG "cmd & IOC_OUT\n"); 470 if (copy_to_user((void __user *)arg, kdata, 471 usize) != 0){ 472 printk(KERN_EMERG "cmd & IOC_OUT error\n"); 473 retcode = -EFAULT; 474 } 475 } The copy_from_user havn't error, So the error is cause by parameter. Or, PAGE_SIZE cause it ? -- You are receiving this mail because: You are the assignee for the bug. --1410769501.da6B8fD0.3991 Date: Mon, 15 Sep 2014 08:25:01 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 32 on bug 82455 from 
>>radeon: The kernel rejected CS, see dmesg for more information
This error is showed in the drm_ioctl function.The part code show as follow:

468                 if (cmd & IOC_OUT) { //error place,
469                         printk(KERN_EMERG "cmd & IOC_OUT\n");
470                         if (copy_to_user((void __user *)arg, kdata,
471                                          usize) != 0){
472                                 printk(KERN_EMERG "cmd & IOC_OUT error\n");
473                                 retcode = -EFAULT;
474                         }
475                 }

The copy_from_user havn't error, So the error is cause by parameter.
Or, PAGE_SIZE cause it ?

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