From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 486527E for ; Wed, 2 Nov 2022 03:02:23 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4B627C433D6; Wed, 2 Nov 2022 03:02:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1667358143; bh=sG9YAFC7qnVpMITPW8cL9/qZ9slEr+LhY0r2ZmTWH3M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DR8hm2flwN+BwyQqwHKo2BdRxkzvLo4v7JBGh0/HEfSwiAU7sfim7rHDvwHx4BoAf Fwt1T3BJNVP3CxXcq7EwKFGS7107GJbMlwCobUyfIht4HonQynD74emjBEWuADETrX pKZaCk3IyYA3IeNI5gh5yQQ7w8ApTjpuXb1fQKxs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jeff Vanhoof , Dan Vacura , Thinh Nguyen Subject: [PATCH 5.15 012/132] usb: dwc3: gadget: Stop processing more requests on IMI Date: Wed, 2 Nov 2022 03:31:58 +0100 Message-Id: <20221102022059.949729475@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221102022059.593236470@linuxfoundation.org> References: <20221102022059.593236470@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Thinh Nguyen commit f78961f8380b940e0cfc7e549336c21a2ad44f4d upstream. When servicing a transfer completion event, the dwc3 driver will reclaim TRBs of started requests up to the request associated with the interrupt event. Currently we don't check for interrupt due to missed isoc, and the driver may attempt to reclaim TRBs beyond the associated event. This causes invalid memory access when the hardware still owns the TRB. If there's a missed isoc TRB with IMI (interrupt on missed isoc), make sure to stop servicing further. Note that only the last TRB of chained TRBs has its status updated with missed isoc. Fixes: 72246da40f37 ("usb: Introduce DesignWare USB3 DRD Driver") Cc: stable@vger.kernel.org Reported-by: Jeff Vanhoof Reported-by: Dan Vacura Signed-off-by: Thinh Nguyen Reviewed-by: Jeff Vanhoof Tested-by: Jeff Vanhoof Link: https://lore.kernel.org/r/b29acbeab531b666095dfdafd8cb5c7654fbb3e1.1666735451.git.Thinh.Nguyen@synopsys.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/dwc3/gadget.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -3146,6 +3146,10 @@ static int dwc3_gadget_ep_reclaim_comple if (event->status & DEPEVT_STATUS_SHORT && !chain) return 1; + if ((trb->ctrl & DWC3_TRB_CTRL_ISP_IMI) && + DWC3_TRB_SIZE_TRBSTS(trb->size) == DWC3_TRBSTS_MISSED_ISOC) + return 1; + if ((trb->ctrl & DWC3_TRB_CTRL_IOC) || (trb->ctrl & DWC3_TRB_CTRL_LST)) return 1;