From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755150AbZLBXRK (ORCPT ); Wed, 2 Dec 2009 18:17:10 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754349AbZLBXRJ (ORCPT ); Wed, 2 Dec 2009 18:17:09 -0500 Received: from mail-iw0-f171.google.com ([209.85.223.171]:42613 "EHLO mail-iw0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754134AbZLBXRI convert rfc822-to-8bit (ORCPT ); Wed, 2 Dec 2009 18:17:08 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-type:content-transfer-encoding; b=jwNkWAgoxr/Bf8jOzORXXxyWH4LWv3rDSDyAORjvjsuLZ2doOhVGU5OQpFVoxOrEBt bWF14H1u22xUi1SWu+FHT5qdSKX07swdXesXHZyDDZfxhMjoGut8zQFCBeflZ64pctrE E5mS3B3UeudPLXVcHmgvkQybn04skZoj7njrk= MIME-Version: 1.0 In-Reply-To: References: From: "Luis R. Rodriguez" Date: Wed, 2 Dec 2009 15:16:54 -0800 Message-ID: <43e72e890912021516k736db118j217dc92496db8f19@mail.gmail.com> Subject: Re: [ath9k-devel] BUG kmalloc-8192: Poison overwritten To: Justin Mattock Cc: Linux Kernel Mailing List , ath9k-devel@venema.h4ckr.net Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Dec 2, 2009 at 2:27 PM, Justin Mattock wrote: > I have no idea what this is: > (first time I've seen this); > > > [   13.055592] ============================================================================= > [   13.055865] BUG kmalloc-8192: Poison overwritten > [   13.056046] ----------------------------------------------------------------------------- I believe this means we write to an area in memory after we freed an skb. > [   13.056366] INFO: 0xffff88003290a100-0xffff88003290a143. First byte > 0x50 instead of 0x6b > [   13.056366] INFO: Allocated in ath_rxbuf_alloc+0x25/0x94 [ath] > age=8898 cpu=0 pid=892 > [   13.056366] INFO: Freed in skb_release_data+0xc1/0xc6 age=99 cpu=0 pid=0 > [   13.056366] INFO: Slab 0xffffea0000b0f9c0 objects=3 used=0 > fp=0xffff88003290c090 flags=0x4000000000004082 > [   13.056366] INFO: Object 0xffff88003290a048 @offset=8264 > fp=0xffff880032908000 > [   13.056366] > [   13.056366] Bytes b4 0xffff88003290a038:  b9 9e fb ff 00 00 00 00 > 5a 5a 5a 5a 5a 5a 5a 5a ¹.ûÿ....ZZZZZZZZ Can you reproduce this? We had a similar report from Miles Lanes I have been trying to followup on for a while now. The suggested patches to try are: http://bombadil.infradead.org/~mcgrof/patches/ath9k/2009/11-19/70-mac80211-total-ampdu-tx-info.patch http://bombadil.infradead.org/~mcgrof/patches/ath9k/2009/11-19/71-ath9k-remove-tx_info_priv.patch Luis