From patchwork Sat Dec 10 09:01:49 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Mailhol X-Patchwork-Id: 13070271 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54116C10F1B for ; Sat, 10 Dec 2022 09:03:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229956AbiLJJDi (ORCPT ); Sat, 10 Dec 2022 04:03:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229844AbiLJJDJ (ORCPT ); Sat, 10 Dec 2022 04:03:09 -0500 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 75B9C11A0D; Sat, 10 Dec 2022 01:02:55 -0800 (PST) Received: by mail-pj1-x102b.google.com with SMTP id u15-20020a17090a3fcf00b002191825cf02so7394967pjm.2; Sat, 10 Dec 2022 01:02:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=qqgVYUfies8u75VfdvF2BT9HYo+3Ha/o4FJ8/jPxSkY=; b=q4wE7Kr2V8HQczzNJa1cXbsYY3gUGyYGsmvw5ElAt64oD33k0UIhL1RXRO0ulK0t3p LhC+EPNFCRtaBy5B+GsJKV1snWtepgWGVVqmiBherQTlo5WYeZa+/MoTgf35kOAMZufc rlneLzLK4+VhkK2qw3ua9wtLTA+K/sAXI1eMbJSE/Bh12iKngJXBSau/cdjOvnPkjK5B xi4WlJ/TKB9w1zD1EsMgO/ALk5wsNcNLN3+jVXlGIJ39G+qDrp9frV13RwOD1zp5ECOj YZu+rS6h0awCJJjJAPArHg9EvuIAf9NDWTR2tKF/RGbyQ11OP4x8xc5X+SJJSgqNKzN6 9zEA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=qqgVYUfies8u75VfdvF2BT9HYo+3Ha/o4FJ8/jPxSkY=; b=1ujyAZlsesqE+ChLkYMhE9VqtUYO+LjhbRNdx4bo+gYx2tQ2dOk/RaoujYXfMdmoJz qleyI+jKLQjRYATg0CCgNS8pqqqHFBpoUHXvHgdky3tRyqC2/bftqxIuVj9pGYLsMo7R IcfWas7Kwbg4SXs0/dc0LTmOLegX1/xeawc4KgGRrXWzVD7n24SwqSltcGXD4lMnWa09 444t6kbPxXDw6AjnPmjnHCTjWOvkV+cNO9PSOpCACmGrS2XSAMmlT+8OZeF2ky4eLfq5 k4maKYo1xrmImDdKi7x3z57RU62hN4/kDjn/jl3IUcJy0PvC396oyhmy8C2X3INyqZaS fIdA== X-Gm-Message-State: ANoB5pmElQfcxe6YHSyLmF86ZMY+wvVtUWvOL4AI+AkKue7IzLZlqNs+ RIMWTkyP6Er5XOfV2IV1vGk= X-Google-Smtp-Source: AA0mqf7eiHRvsVEhMkg5Lb5+E2zXGrfWNTNZ35Wo60ESDEpSAfI4aBdGcckttGmWINxPrsKI4c6Nbg== X-Received: by 2002:a17:903:2012:b0:189:d3dc:a9c6 with SMTP id s18-20020a170903201200b00189d3dca9c6mr8457742pla.19.1670662974862; Sat, 10 Dec 2022 01:02:54 -0800 (PST) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id u7-20020a17090282c700b00186a2444a43sm2549481plz.27.2022.12.10.01.02.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Dec 2022 01:02:54 -0800 (PST) Sender: Vincent Mailhol From: Vincent Mailhol To: Marc Kleine-Budde , linux-can@vger.kernel.org Cc: Oliver Neukum , Wolfgang Grandegger , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Frank Jungclaus , socketcan@esd.eu, Yasushi SHOJI , =?utf-8?q?Stefan_M=C3=A4tje?= , Hangyu Hua , Oliver Hartkopp , Peter Fink , Jeroen Hofstee , =?utf-8?q?Christoph_M=C3=B6hring?= , John Whittington , Vasanth Sadhasivan , Jimmy Assarsson , Anssi Hannula , Pavel Skripkin , Stephane Grosjean , Wolfram Sang , "Gustavo A . R . Silva" , Julia Lawall , Dongliang Mu , Sebastian Haas , Maximilian Schneider , Daniel Berglund , Olivier Sobrie , =?utf-8?b?UmVtaWdpdXN6IEtvxYLFgsSFdGFq?= , Jakob Unterwurzacher , Martin Elshuber , Bernd Krumboeck , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Stern , linux-usb@vger.kernel.org, Vincent Mailhol Subject: [PATCH v2 1/9] can: ems_usb: ems_usb_disconnect(): fix NULL pointer dereference Date: Sat, 10 Dec 2022 18:01:49 +0900 Message-Id: <20221210090157.793547-2-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> References: <20221203133159.94414-1-mailhol.vincent@wanadoo.fr> <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org ems_usb sets the driver's priv data to NULL before waiting for the completion of outsdanding urbs. This can results in NULL pointer dereference, c.f. [1] and [2]. Remove the call to usb_set_intfdata(intf, NULL). The core will take care of setting it to NULL after ems_usb_disconnect() at [3]. [1] c/27ef17849779 ("usb: add usb_set_intfdata() documentation") Link: https://git.kernel.org/gregkh/usb/c/27ef17849779 [2] thread about usb_set_intfdata() on linux-usb mailing. Link: https://lore.kernel.org/linux-usb/Y4OD70GD4KnoRk0k@rowland.harvard.edu/ [3] function usb_unbind_interface() from drivers/usb/core/driver.c Link: https://elixir.bootlin.com/linux/v6.0/source/drivers/usb/core/driver.c#L497 Fixes: 702171adeed3 ("ems_usb: Added support for EMS CPC-USB/ARM7 CAN/USB interface") Signed-off-by: Vincent Mailhol --- drivers/net/can/usb/ems_usb.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/can/usb/ems_usb.c b/drivers/net/can/usb/ems_usb.c index 050c0b49938a..c64cb40ac8de 100644 --- a/drivers/net/can/usb/ems_usb.c +++ b/drivers/net/can/usb/ems_usb.c @@ -1062,8 +1062,6 @@ static void ems_usb_disconnect(struct usb_interface *intf) { struct ems_usb *dev = usb_get_intfdata(intf); - usb_set_intfdata(intf, NULL); - if (dev) { unregister_netdev(dev->netdev); From patchwork Sat Dec 10 09:01:50 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Mailhol X-Patchwork-Id: 13070272 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 31A76C10F1B for ; Sat, 10 Dec 2022 09:03:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229976AbiLJJDu (ORCPT ); Sat, 10 Dec 2022 04:03:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45728 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229821AbiLJJDN (ORCPT ); Sat, 10 Dec 2022 04:03:13 -0500 Received: from mail-pj1-x102b.google.com (mail-pj1-x102b.google.com [IPv6:2607:f8b0:4864:20::102b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7AEA01572D; Sat, 10 Dec 2022 01:03:02 -0800 (PST) Received: by mail-pj1-x102b.google.com with SMTP id u15-20020a17090a3fcf00b002191825cf02so7395147pjm.2; Sat, 10 Dec 2022 01:03:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=4DVtAm9qztHyZBrD4ZVLrTHR+RA9lfulcIIjDcTmdPQ=; b=OrMCEYGTR/LDfFd3lfYST1dGQLTy+XYi+8lUHZpCR3sTtLTf9kTtLnjsWuiCo/yJFV upDwACLmxAWYT2a2lDQHD9aJCiX07KYRm1ryqAEJcDgYAaLlO1b0Ut7lEJXdHK4Wc0Q+ T9UZxu5xe7+iN8wgO0VYDOZdP1RkyW4xPt+lACxYtk25rywKEo3T449w25za9Dw1Ym0U 4199KBxpnuhbsBLtatH8bMSnJwxlnShphA6Z1EM5Yaw/3Pdw/OeyjtDDfmrXiHHRlom7 z8PZvK98RQSU5VFhJoQVrZp6HVuqnA2VlPdLiqZmAHZVdQ2RMdKbFdv/cXl3HKiMQmnz ZaOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=4DVtAm9qztHyZBrD4ZVLrTHR+RA9lfulcIIjDcTmdPQ=; b=BxDSPqddc7mdnKRysFiF9b3UN5z28wXOwASur1R8f+u7EGjIb2YJC+uZxC4aajP2SU KHmZVV5YzGbmmamyfhP/VrUFEbNPI0BdIlzq7ba3JOC76Q/1MpRqMyb/qU7wjKHxM9KM 4mmEUfT1A8I2n0s1lXPFuJt9TTcGencX7hIPk5pzi36Dl5Vxv8s5imaz4dtWZkhX09JG jwURAA9jsZ74dWDu2wRCRo7zAx6EhwBJCP77ProKQigZAOOPi0T+fgFrqCRUNBnZ9k6Y LtF50NEsD2ug3AHD4u8aqlzVjgCdIo4daZ378ReWY6H+L+Ed+HskLQJ1SvmTmONyqU8M +GPQ== X-Gm-Message-State: ANoB5pkTU0dJLoqXda/nKA/BzO1p+Y9BrYawh7GsE3nVHy16CSgj4HQK Y1LMtxUY6/8qHr+ax5ce38I= X-Google-Smtp-Source: AA0mqf4b370FMGctMLWBPB42Vhi2lbTxMKKU0lVOWD3OfcHBPeOclpu1y2MyDCcrZyPg9S/evE3B7g== X-Received: by 2002:a05:6a20:28a0:b0:ad:58d4:2a7a with SMTP id q32-20020a056a2028a000b000ad58d42a7amr484019pzf.22.1670662982080; Sat, 10 Dec 2022 01:03:02 -0800 (PST) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id u7-20020a17090282c700b00186a2444a43sm2549481plz.27.2022.12.10.01.02.55 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Dec 2022 01:03:01 -0800 (PST) Sender: Vincent Mailhol From: Vincent Mailhol To: Marc Kleine-Budde , linux-can@vger.kernel.org Cc: Oliver Neukum , Wolfgang Grandegger , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Frank Jungclaus , socketcan@esd.eu, Yasushi SHOJI , =?utf-8?q?Stefan_M=C3=A4tje?= , Hangyu Hua , Oliver Hartkopp , Peter Fink , Jeroen Hofstee , =?utf-8?q?Christoph_M=C3=B6hring?= , John Whittington , Vasanth Sadhasivan , Jimmy Assarsson , Anssi Hannula , Pavel Skripkin , Stephane Grosjean , Wolfram Sang , "Gustavo A . R . Silva" , Julia Lawall , Dongliang Mu , Sebastian Haas , Maximilian Schneider , Daniel Berglund , Olivier Sobrie , =?utf-8?b?UmVtaWdpdXN6IEtvxYLFgsSFdGFq?= , Jakob Unterwurzacher , Martin Elshuber , Bernd Krumboeck , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Stern , linux-usb@vger.kernel.org, Vincent Mailhol Subject: [PATCH v2 2/9] can: esd_usb: esd_usb_disconnect(): fix NULL pointer dereference Date: Sat, 10 Dec 2022 18:01:50 +0900 Message-Id: <20221210090157.793547-3-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> References: <20221203133159.94414-1-mailhol.vincent@wanadoo.fr> <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org esd_usb sets the driver's priv data to NULL before waiting for the completion of outsdanding urbs. This can results in NULL pointer dereference, c.f. [1] and [2]. Remove the call to usb_set_intfdata(intf, NULL). The core will take care of setting it to NULL after esd_usb_disconnect() at [3]. [1] c/27ef17849779 ("usb: add usb_set_intfdata() documentation") Link: https://git.kernel.org/gregkh/usb/c/27ef17849779 [2] thread about usb_set_intfdata() on linux-usb mailing. Link: https://lore.kernel.org/linux-usb/Y4OD70GD4KnoRk0k@rowland.harvard.edu/ [3] function usb_unbind_interface() from drivers/usb/core/driver.c Link: https://elixir.bootlin.com/linux/v6.0/source/drivers/usb/core/driver.c#L497 Fixes: 96d8e90382dc ("can: Add driver for esd CAN-USB/2 device") Signed-off-by: Vincent Mailhol --- @stable team: the file was renamed from esd_usb2.c to esd_usb.c in [4]. [4] 5e910bdedc84 ("can/esd_usb2: Rename esd_usb2.c to esd_usb.c") --- drivers/net/can/usb/esd_usb.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/can/usb/esd_usb.c b/drivers/net/can/usb/esd_usb.c index 81b88e9e5bdc..f3006c6dc5d6 100644 --- a/drivers/net/can/usb/esd_usb.c +++ b/drivers/net/can/usb/esd_usb.c @@ -1127,8 +1127,6 @@ static void esd_usb_disconnect(struct usb_interface *intf) device_remove_file(&intf->dev, &dev_attr_hardware); device_remove_file(&intf->dev, &dev_attr_nets); - usb_set_intfdata(intf, NULL); - if (dev) { for (i = 0; i < dev->net_count; i++) { if (dev->nets[i]) { From patchwork Sat Dec 10 09:01:51 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Mailhol X-Patchwork-Id: 13070273 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 12C80C10F1B for ; Sat, 10 Dec 2022 09:04:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229762AbiLJJES (ORCPT ); Sat, 10 Dec 2022 04:04:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45774 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229760AbiLJJDS (ORCPT ); Sat, 10 Dec 2022 04:03:18 -0500 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E660EB4A8; Sat, 10 Dec 2022 01:03:09 -0800 (PST) Received: by mail-pj1-x1032.google.com with SMTP id k88-20020a17090a4ce100b00219d0b857bcso7400920pjh.1; Sat, 10 Dec 2022 01:03:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=9Z10lP26tLNF8l9gnqOlj3ECah9AEf8DusZ0dGN4b5k=; b=Le5Q1XRol57xXCFL5WsRZ+jh7djRMnNzZOh2uKS+gOEhZGfEksKmYMClZz3KdAgIlc d6FJUW4xsKRXzt127nL1rcZi6QHP3CPekN242s3ws6X2YcCpSqLfoTNYvmRsAf49VkTb vU1FvvVuPgqsAjti76/YProtW23B4agrbhwvygQ8DFlaCO0eoWRv1Qk2t0bG+rZCKqQJ v61r1BmJN2x3oWYDE1SsiTkj165h+MhLtCbzNZMiDD4E84NvPjHns521xKXxT49oVEMi zX4WqILrI6rfiIpdKnWMmeew8xlBkhMfJl8F3TGbKqg5fEe6bmmZgy+eAsS/jhh6D3b+ 4Jrg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=9Z10lP26tLNF8l9gnqOlj3ECah9AEf8DusZ0dGN4b5k=; b=ua8vovFHv4EVGSGPaPJjo9ZiF/CJiXlA3xFu0/bstkFvLkWmYq3jSY0dcSDoYHBsNO Q4POd1nsdcbpsqr4vtYgSXrZf1jvIlKdFZdJZKJXXw82Ig/v3ALYyv/5yhbp1CFpY1rS B9LSy1JVKYf6nI2g6ZLFtkQwC+Rr9m65L48sgfqegDUmaj6l39UQKcF0mbYOa96b7HZf 2PdSpdHj4w55ZHeZG3yT+PsmAfHFfF+FY1KOLgef7rZDfeGG5ElPb5VKQpmk7BR1f9pb NExpz6DeAmwtbWd2yunfjNFqMogTI7sYPj7YTX7nPblKEuRG9fG79YF/esRTxXJPrFcY H2xA== X-Gm-Message-State: ANoB5pmxBnV7iKG9YFftNcVh+xbUMG/l9WTgFCf2zqetuEptkAKvgZI+ GeABUUskMyyKPGGmR1m68jM= X-Google-Smtp-Source: AA0mqf4b/LYnyg5qiFgH4xNHuQRlbshDKybh0+Th43y2MZQoCtFnsGzgcGN0jnhMPttQ+VG+ahTRQg== X-Received: by 2002:a17:902:e5cd:b0:188:f547:c0ed with SMTP id u13-20020a170902e5cd00b00188f547c0edmr12401925plf.38.1670662989326; Sat, 10 Dec 2022 01:03:09 -0800 (PST) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id u7-20020a17090282c700b00186a2444a43sm2549481plz.27.2022.12.10.01.03.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Dec 2022 01:03:09 -0800 (PST) Sender: Vincent Mailhol From: Vincent Mailhol To: Marc Kleine-Budde , linux-can@vger.kernel.org Cc: Oliver Neukum , Wolfgang Grandegger , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Frank Jungclaus , socketcan@esd.eu, Yasushi SHOJI , =?utf-8?q?Stefan_M=C3=A4tje?= , Hangyu Hua , Oliver Hartkopp , Peter Fink , Jeroen Hofstee , =?utf-8?q?Christoph_M=C3=B6hring?= , John Whittington , Vasanth Sadhasivan , Jimmy Assarsson , Anssi Hannula , Pavel Skripkin , Stephane Grosjean , Wolfram Sang , "Gustavo A . R . Silva" , Julia Lawall , Dongliang Mu , Sebastian Haas , Maximilian Schneider , Daniel Berglund , Olivier Sobrie , =?utf-8?b?UmVtaWdpdXN6IEtvxYLFgsSFdGFq?= , Jakob Unterwurzacher , Martin Elshuber , Bernd Krumboeck , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Stern , linux-usb@vger.kernel.org, Vincent Mailhol Subject: [PATCH v2 3/9] can: gs_usb: gs_usb_disconnect(): fix NULL pointer dereference Date: Sat, 10 Dec 2022 18:01:51 +0900 Message-Id: <20221210090157.793547-4-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> References: <20221203133159.94414-1-mailhol.vincent@wanadoo.fr> <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org gs_usb sets the driver's priv data to NULL before waiting for the completion of outsdanding urbs. This can results in NULL pointer dereference, c.f. [1] and [2]. Remove the call to usb_set_intfdata(intf, NULL). The core will take care of setting it to NULL after gs_usb_disconnect() at [3]. [1] c/27ef17849779 ("usb: add usb_set_intfdata() documentation") Link: https://git.kernel.org/gregkh/usb/c/27ef17849779 [2] thread about usb_set_intfdata() on linux-usb mailing. Link: https://lore.kernel.org/linux-usb/Y4OD70GD4KnoRk0k@rowland.harvard.edu/ [3] function usb_unbind_interface() from drivers/usb/core/driver.c Link: https://elixir.bootlin.com/linux/v6.0/source/drivers/usb/core/driver.c#L497 Fixes: d08e973a77d1 ("can: gs_usb: Added support for the GS_USB CAN devices") Signed-off-by: Vincent Mailhol --- drivers/net/can/usb/gs_usb.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c index 838744d2ce34..97b1da8fd19f 100644 --- a/drivers/net/can/usb/gs_usb.c +++ b/drivers/net/can/usb/gs_usb.c @@ -1458,8 +1458,6 @@ static void gs_usb_disconnect(struct usb_interface *intf) struct gs_usb *dev = usb_get_intfdata(intf); unsigned int i; - usb_set_intfdata(intf, NULL); - if (!dev) { dev_err(&intf->dev, "Disconnect (nodata)\n"); return; From patchwork Sat Dec 10 09:01:52 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Mailhol X-Patchwork-Id: 13070274 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52AAAC10F1B for ; Sat, 10 Dec 2022 09:04:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230014AbiLJJEY (ORCPT ); Sat, 10 Dec 2022 04:04:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46244 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229907AbiLJJDS (ORCPT ); Sat, 10 Dec 2022 04:03:18 -0500 Received: from mail-pj1-x1036.google.com (mail-pj1-x1036.google.com [IPv6:2607:f8b0:4864:20::1036]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2E46CB7; Sat, 10 Dec 2022 01:03:17 -0800 (PST) Received: by mail-pj1-x1036.google.com with SMTP id fy4so6920491pjb.0; Sat, 10 Dec 2022 01:03:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=/1fa7mtks0N/WurNaTfmwfwJgDz/Tqfo6okS65bthdQ=; b=AQHUYbtOoW5Gne7fhhw+e8Pt4UFlo9+Nu4vpgd5hs5WV7Dg2+6E/HXimOsYcnS/MNa bONTYfrBLOjF/6xcYMtEEuBAsng7ZzR0upwS9cCuyiZn6BRedyqNzOMoYjr83bMnmQ8a FrOSxWHiy4R5qxakm5/uIYaZoPuGeSHxNxA5gi5rlqUJ84+2i4E3Qn0aFxSuZCfqA0ZJ xY2+Tx4JZP11JslSBX0xvsmIvaQFnx2nPnO2fME3mPKelYpnrJ52B90nWUJelDXfTnVY olkrMaqbYXOUyyKvS/w9/e6ctCeVVZC3++jZ2IVd69dDJFHv07bQPnhJ7Xj8fOUGAVCz GwHg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=/1fa7mtks0N/WurNaTfmwfwJgDz/Tqfo6okS65bthdQ=; b=s2SvjQAHsh0LLDSzgS92XJ1nv0mynazQvY3dsyf76rdF9akSRSqO8qPWhWHXIfzhI2 Shh0hRjxEkRUVWQ7OOxm8jGfQeBqHuknUBQCCmIBE2aWPkjoXMUdI8PxgUsxjE0o7yWE IpzbAQsanNVS6kGeVdZbKK0dBaJLoA4iXV4HcrWjkJTgLyQYp5A6lLH2arkJHKwcyBWN Yk+cbZHmmnBq2vOafvDlOE1GgHTZkeKX7PvADXaQZmLUtPNl3GfZcS3QQ7Tj0tNimkjG 1I+RvzEW54svW1PlVoXnk0mIhHBUrMBQHk49TyJUVympNw9ig2pn2WdUjWmpHEvhYnCS 2Rew== X-Gm-Message-State: ANoB5pk5G3mzxX3aqNqD2vj04zTrb8KYTWVKsxvWA59Aq2LRNGFo5NAB qhyfip0o8gSsEjmd9OanjyA= X-Google-Smtp-Source: AA0mqf6cwDtpJ2vszh+ZzDEn0dKGGcq/YPifGaOTVRf4SeuJE5E8MJgxMGnS5xVQzz+YG/2s1smO0Q== X-Received: by 2002:a17:902:ab07:b0:189:529d:a464 with SMTP id ik7-20020a170902ab0700b00189529da464mr8592241plb.17.1670662996607; Sat, 10 Dec 2022 01:03:16 -0800 (PST) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id u7-20020a17090282c700b00186a2444a43sm2549481plz.27.2022.12.10.01.03.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Dec 2022 01:03:16 -0800 (PST) Sender: Vincent Mailhol From: Vincent Mailhol To: Marc Kleine-Budde , linux-can@vger.kernel.org Cc: Oliver Neukum , Wolfgang Grandegger , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Frank Jungclaus , socketcan@esd.eu, Yasushi SHOJI , =?utf-8?q?Stefan_M=C3=A4tje?= , Hangyu Hua , Oliver Hartkopp , Peter Fink , Jeroen Hofstee , =?utf-8?q?Christoph_M=C3=B6hring?= , John Whittington , Vasanth Sadhasivan , Jimmy Assarsson , Anssi Hannula , Pavel Skripkin , Stephane Grosjean , Wolfram Sang , "Gustavo A . R . Silva" , Julia Lawall , Dongliang Mu , Sebastian Haas , Maximilian Schneider , Daniel Berglund , Olivier Sobrie , =?utf-8?b?UmVtaWdpdXN6IEtvxYLFgsSFdGFq?= , Jakob Unterwurzacher , Martin Elshuber , Bernd Krumboeck , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Stern , linux-usb@vger.kernel.org, Vincent Mailhol Subject: [PATCH v2 4/9] can: kvaser_usb: kvaser_usb_disconnect(): fix NULL pointer dereference Date: Sat, 10 Dec 2022 18:01:52 +0900 Message-Id: <20221210090157.793547-5-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> References: <20221203133159.94414-1-mailhol.vincent@wanadoo.fr> <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org kvaser_usb sets the driver's priv data to NULL before waiting for the completion of outsdanding urbs. This can results in NULL pointer dereference, c.f. [1] and [2]. Remove the call to usb_set_intfdata(intf, NULL). The core will take care of setting it to NULL after kvaser_usb_disconnect() at [3]. [1] c/27ef17849779 ("usb: add usb_set_intfdata() documentation") Link: https://git.kernel.org/gregkh/usb/c/27ef17849779 [2] thread about usb_set_intfdata() on linux-usb mailing. Link: https://lore.kernel.org/linux-usb/Y4OD70GD4KnoRk0k@rowland.harvard.edu/ [3] function usb_unbind_interface() from drivers/usb/core/driver.c Link: https://elixir.bootlin.com/linux/v6.0/source/drivers/usb/core/driver.c#L497 Fixes: 080f40a6fa28 ("can: kvaser_usb: Add support for Kvaser CAN/USB devices") Signed-off-by: Vincent Mailhol --- @stable team: the function was moved from kvaser_usb.c to kvaser_usb_core.c in: 7259124eac7d1 ("can: kvaser_usb: Split driver into kvaser_usb_core.c and kvaser_usb_leaf.c") --- drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c index 3a2bfaad1406..dad916b3288e 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c @@ -981,8 +981,6 @@ static void kvaser_usb_disconnect(struct usb_interface *intf) { struct kvaser_usb *dev = usb_get_intfdata(intf); - usb_set_intfdata(intf, NULL); - if (!dev) return; From patchwork Sat Dec 10 09:01:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Mailhol X-Patchwork-Id: 13070275 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 23A97C4708D for ; Sat, 10 Dec 2022 09:04:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230036AbiLJJEj (ORCPT ); Sat, 10 Dec 2022 04:04:39 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45656 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229824AbiLJJDa (ORCPT ); Sat, 10 Dec 2022 04:03:30 -0500 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B53F17597; Sat, 10 Dec 2022 01:03:24 -0800 (PST) Received: by mail-pl1-x62f.google.com with SMTP id jn7so7291323plb.13; Sat, 10 Dec 2022 01:03:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=iy6XntU3ziYyOfLWnkl9Fuz5o2kWJR8AuXRUOe4t654=; b=FswO23llZrXl/OXDY6zvuq2w9p3gmOC4Sz++bcYGUMjhRqXguI2Uh2d+ycRX5eN9JN nZWSJEiOgoTX4JANFZsLCmrwQpeEEt1jHFXFY2u8iPP+jVt3MmJVYCSAdB5xxoHnjvOv skgbJ/q8w8kr3ojxEQGGvngEuNt3HjOa2la+cqek1EHHxpRsyLKHtI9x8P4Sec7+IaX8 feGqDEHzwX5CExoACRG8upkGbxTnDs5vBwjW627Xtr/1S++7r+z7G4a397otKMzC9erF RO4qO2gBke7CMHYFa1ntZkYJYWsrCJ9NKmDdLTsGl28XuN5M6NwK3T5HO8WfJ1VlQLII DIKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=iy6XntU3ziYyOfLWnkl9Fuz5o2kWJR8AuXRUOe4t654=; b=rpY7gehy7Dx4vABA7Zb8qV+AlkWXipxlqqcYDTWVP0WnO+BMDjfhEerGPeuSXTTzkT XWG1K5TkT1nWdo5Rk+FmijzgvbIkm26xoYrD0JpyQF0hocfUi5YQYefZDDru2/vdg2Om U0uwoWWGQUoreFhVSUbGWIqBs4phANPsJhmqXNwnfnuN+w3b4CqR66/AyZs8V8geWUOy rHbPHJRa9BaigLDM/CXSOvHPWzTmvTAoPzqBpW7lfDzTTRXvVge2JICBpdpkNGdKfZmo 7boVYxECWyJBWXC3FfpWnYCpVnf/1ZQpw4Tx8IsUlJINjjA+aYh9r2YUFriID+UsGKYk 5wkA== X-Gm-Message-State: ANoB5plyejyzzDVS/absyEdKYHh4xcICR4N3BoVpmV0+NvLoTYeGsCWU tyKkU5YiT2aaJbPiCjo8Azw= X-Google-Smtp-Source: AA0mqf4wuYfD+g9BmttjzHl9v1j3+bmN1XNA7uESR0IOMZUaeWaCfrMuwOIEhX/CgeVrPbt/vNZgBg== X-Received: by 2002:a17:903:2446:b0:189:a50d:2a40 with SMTP id l6-20020a170903244600b00189a50d2a40mr11552395pls.45.1670663003927; Sat, 10 Dec 2022 01:03:23 -0800 (PST) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id u7-20020a17090282c700b00186a2444a43sm2549481plz.27.2022.12.10.01.03.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Dec 2022 01:03:23 -0800 (PST) Sender: Vincent Mailhol From: Vincent Mailhol To: Marc Kleine-Budde , linux-can@vger.kernel.org Cc: Oliver Neukum , Wolfgang Grandegger , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Frank Jungclaus , socketcan@esd.eu, Yasushi SHOJI , =?utf-8?q?Stefan_M=C3=A4tje?= , Hangyu Hua , Oliver Hartkopp , Peter Fink , Jeroen Hofstee , =?utf-8?q?Christoph_M=C3=B6hring?= , John Whittington , Vasanth Sadhasivan , Jimmy Assarsson , Anssi Hannula , Pavel Skripkin , Stephane Grosjean , Wolfram Sang , "Gustavo A . R . Silva" , Julia Lawall , Dongliang Mu , Sebastian Haas , Maximilian Schneider , Daniel Berglund , Olivier Sobrie , =?utf-8?b?UmVtaWdpdXN6IEtvxYLFgsSFdGFq?= , Jakob Unterwurzacher , Martin Elshuber , Bernd Krumboeck , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Stern , linux-usb@vger.kernel.org, Vincent Mailhol Subject: [PATCH v2 5/9] can: mcba_usb: mcba_usb_disconnect(): fix NULL pointer dereference Date: Sat, 10 Dec 2022 18:01:53 +0900 Message-Id: <20221210090157.793547-6-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> References: <20221203133159.94414-1-mailhol.vincent@wanadoo.fr> <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org mcba_usb sets the driver's priv data to NULL before waiting for the completion of outsdanding urbs. This can results in NULL pointer dereference, c.f. [1] and [2]. Remove the call to usb_set_intfdata(intf, NULL). The core will take care of setting it to NULL after mcba_usb_disconnect() at [3]. [1] c/27ef17849779 ("usb: add usb_set_intfdata() documentation") Link: https://git.kernel.org/gregkh/usb/c/27ef17849779 [2] thread about usb_set_intfdata() on linux-usb mailing. Link: https://lore.kernel.org/linux-usb/Y4OD70GD4KnoRk0k@rowland.harvard.edu/ [3] function usb_unbind_interface() from drivers/usb/core/driver.c Link: https://elixir.bootlin.com/linux/v6.0/source/drivers/usb/core/driver.c#L497 Fixes: 51f3baad7de9 ("can: mcba_usb: Add support for Microchip CAN BUS Analyzer") Signed-off-by: Vincent Mailhol --- drivers/net/can/usb/mcba_usb.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/can/usb/mcba_usb.c b/drivers/net/can/usb/mcba_usb.c index 47619e9cb005..a21c1ad4894f 100644 --- a/drivers/net/can/usb/mcba_usb.c +++ b/drivers/net/can/usb/mcba_usb.c @@ -890,8 +890,6 @@ static void mcba_usb_disconnect(struct usb_interface *intf) { struct mcba_priv *priv = usb_get_intfdata(intf); - usb_set_intfdata(intf, NULL); - netdev_info(priv->netdev, "device disconnected\n"); unregister_candev(priv->netdev); From patchwork Sat Dec 10 09:01:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Mailhol X-Patchwork-Id: 13070276 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5BB4AC10F1B for ; Sat, 10 Dec 2022 09:05:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230045AbiLJJFZ (ORCPT ); Sat, 10 Dec 2022 04:05:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45708 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229949AbiLJJDh (ORCPT ); Sat, 10 Dec 2022 04:03:37 -0500 Received: from mail-pj1-x102e.google.com (mail-pj1-x102e.google.com [IPv6:2607:f8b0:4864:20::102e]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C52371A391; Sat, 10 Dec 2022 01:03:31 -0800 (PST) Received: by mail-pj1-x102e.google.com with SMTP id u5so7193909pjy.5; Sat, 10 Dec 2022 01:03:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=Fbmtr+iu05G8hE8+xl0zyODEJYTrkuIzNhZByD6qtnU=; b=UgzLWMXzuwLLSAvD3KHkxw0Bw89627SDEXoKyGTUeeML2rh1RnKO4wDuj3np4KehRh gbavZMR6IMWyNrOyBD3I6w3lEqDVKQCG8GUZGBrpuqvYECsIy+ZYEHwU95f0ezAzP5fv yF6WOlLlP2kIgwoKQBpKVizodDklO8bZ8GDcyAdIUNYygfxi6Zf+ne7vWUbL00IiDHdE 5XalkUklF4SWXQ1dBsARtlGDm6i//q1t0YA9kJ6CBNVfS/6UxR2tB4VIXUfFiadNuAMQ 6A3aPWcixahKkvE5ulLgEXMN89Z7v6dmsKPfg7Nc0xj0bMY7oYa8L6LOsUYf/mqOb0FN Nvyw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=Fbmtr+iu05G8hE8+xl0zyODEJYTrkuIzNhZByD6qtnU=; b=3KQvLBLW0Yarpz1XjvIoxdagUgGkpjzde9mpgvYciB+LItaXHRmCIAA4BZrsq5fsq3 OPKB2T/sbiBTksyhXDMwXiWzbHY2VjaXicfryub31IRXOtIctYeP9uPQJnX4HZ71R3yp 3KbQM6nJ7vMWLe6l1T2dURLpJYiyUPXORJNOrLsAH1x1PwgzDwcyCmeGKMRtSiz9BWtH 4yXCskq+F4TPvL3jACM4YOX1Zojuue69Y6NZ1cIzxPqmL6luWwiOh9SHQnA/n7rWUQq/ NoSRo2X392mYK7rV8PyfYr3ibssG49cfdzkV7R0xjctJt3cJ4c9rM4GeA7r06fre0aq4 dXew== X-Gm-Message-State: ANoB5pk60McBjFvt9qzl+TcW9vFk4ExsN4a/5Zct544nhtZ4QeY/F4BX ksWLGLInElZTu9a5aaO+UT8= X-Google-Smtp-Source: AA0mqf51A0TZNJaaVYc00wBlbOrjqA1IBl3NJL6KTcsIV7XAYX+HxOIZ2l4Pt/lnCZ/U0cgPYIauIg== X-Received: by 2002:a17:903:41c5:b0:189:cec6:7ac5 with SMTP id u5-20020a17090341c500b00189cec67ac5mr12370330ple.44.1670663011217; Sat, 10 Dec 2022 01:03:31 -0800 (PST) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id u7-20020a17090282c700b00186a2444a43sm2549481plz.27.2022.12.10.01.03.24 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Dec 2022 01:03:30 -0800 (PST) Sender: Vincent Mailhol From: Vincent Mailhol To: Marc Kleine-Budde , linux-can@vger.kernel.org Cc: Oliver Neukum , Wolfgang Grandegger , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Frank Jungclaus , socketcan@esd.eu, Yasushi SHOJI , =?utf-8?q?Stefan_M=C3=A4tje?= , Hangyu Hua , Oliver Hartkopp , Peter Fink , Jeroen Hofstee , =?utf-8?q?Christoph_M=C3=B6hring?= , John Whittington , Vasanth Sadhasivan , Jimmy Assarsson , Anssi Hannula , Pavel Skripkin , Stephane Grosjean , Wolfram Sang , "Gustavo A . R . Silva" , Julia Lawall , Dongliang Mu , Sebastian Haas , Maximilian Schneider , Daniel Berglund , Olivier Sobrie , =?utf-8?b?UmVtaWdpdXN6IEtvxYLFgsSFdGFq?= , Jakob Unterwurzacher , Martin Elshuber , Bernd Krumboeck , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Stern , linux-usb@vger.kernel.org, Vincent Mailhol Subject: [PATCH v2 6/9] can: ucan: ucan_disconnect(): fix NULL pointer dereference Date: Sat, 10 Dec 2022 18:01:54 +0900 Message-Id: <20221210090157.793547-7-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> References: <20221203133159.94414-1-mailhol.vincent@wanadoo.fr> <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org ucan sets the driver's priv data to NULL before waiting for the completion of outsdanding urbs. This can results in NULL pointer dereference, c.f. [1] and [2]. Remove the call to usb_set_intfdata(intf, NULL). The core will take care of setting it to NULL after ucan_disconnect() at [3]. [1] c/27ef17849779 ("usb: add usb_set_intfdata() documentation") Link: https://git.kernel.org/gregkh/usb/c/27ef17849779 [2] thread about usb_set_intfdata() on linux-usb mailing. Link: https://lore.kernel.org/linux-usb/Y4OD70GD4KnoRk0k@rowland.harvard.edu/ [3] function usb_unbind_interface() from drivers/usb/core/driver.c Link: https://elixir.bootlin.com/linux/v6.0/source/drivers/usb/core/driver.c#L497 Fixes: 9f2d3eae88d2 ("can: ucan: add driver for Theobroma Systems UCAN devices") Signed-off-by: Vincent Mailhol --- drivers/net/can/usb/ucan.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/can/usb/ucan.c b/drivers/net/can/usb/ucan.c index ffa38f533c35..429b3519ee7f 100644 --- a/drivers/net/can/usb/ucan.c +++ b/drivers/net/can/usb/ucan.c @@ -1579,8 +1579,6 @@ static void ucan_disconnect(struct usb_interface *intf) { struct ucan_priv *up = usb_get_intfdata(intf); - usb_set_intfdata(intf, NULL); - if (up) { unregister_candev(up->netdev); free_candev(up->netdev); From patchwork Sat Dec 10 09:01:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Mailhol X-Patchwork-Id: 13070277 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F22B6C4708D for ; Sat, 10 Dec 2022 09:05:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229875AbiLJJFx (ORCPT ); Sat, 10 Dec 2022 04:05:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46238 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229897AbiLJJEP (ORCPT ); Sat, 10 Dec 2022 04:04:15 -0500 Received: from mail-pj1-x102a.google.com (mail-pj1-x102a.google.com [IPv6:2607:f8b0:4864:20::102a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 116C125EF; Sat, 10 Dec 2022 01:03:39 -0800 (PST) Received: by mail-pj1-x102a.google.com with SMTP id o1-20020a17090a678100b00219cf69e5f0so10654086pjj.2; Sat, 10 Dec 2022 01:03:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=pa3DAHwWDelaMryXafO6tGBc9UO2GhBo2ljQmz+7iQs=; b=M4QXAhvAH2eGt1ylyB64bOaFHwiFc+CBiEpoLnv4v1iGZPuAkFClsRom7OrmYnWnMG wZSKDciH8kf2sSAyO6QAoSUWsulapheuNTWfnUWBpx7ozuE7iolVMdqD178hdqtH6+qL fuKBbxroyOvt+Cpf268JUbrF3nOGNsI7YTTux0KSyf2aFyCobckTe5CtJrHGHGwr9HcH fZjCCjklWCoz6sZen8INjEYsOqRnU1J67OkyJdytUGhd5L2HOlKPd00UKQUe9bf3hwXE jQMR0jq9hI66lwRdhy/zsHxBqrcDfz+5s9gy3lAPiio3YYWGAbhMCFadZppsQTt+/Jng XxDA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=pa3DAHwWDelaMryXafO6tGBc9UO2GhBo2ljQmz+7iQs=; b=MuxTGDOCmg4feQKMC7QEpM9yeMqer8QJiZyuy65SyTXo053B5IyMd/5AyJZm+VsO2V RuiBv/MvzjSZ0yjkg4aVrY1+XilP63bNnoNBt7higFYQmTsH7zgVZ2TikwKqJW3UUORU yNltwiPf1XE+npL8Soqy2jyofstu+ZI6EaTug7oblMz9A1fdsAQ+iI38A9TBahGIHma/ 6az7+kVE9WZWw6Ig+7fMXm44Yu8GPWw+jCF6PMGJd3EqhdbbNKKQaj1UBjXTIA8uxOWc EciBixy6NkKboSYw8rW6S8X3GQ6des535UYCbpOPwIVGoSzt8WEfZf091aZEwsk1PT6D Odgg== X-Gm-Message-State: ANoB5pmaYnjRT6uM3TabeMx3upQ9gC/VBVkGaCaBP03P4N4jz0EhN0y5 aKZf9DQgtE+do0nr+RQjNfk= X-Google-Smtp-Source: AA0mqf7l6aaijQskDg/TUOxXIjLEe6zhoOOWBTpDEVkBrAma51dtyvuZYcEN85pbRkJ2fJDd1QLY2Q== X-Received: by 2002:a17:903:4094:b0:189:7548:20a7 with SMTP id z20-20020a170903409400b00189754820a7mr7429526plc.56.1670663018501; Sat, 10 Dec 2022 01:03:38 -0800 (PST) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id u7-20020a17090282c700b00186a2444a43sm2549481plz.27.2022.12.10.01.03.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Dec 2022 01:03:38 -0800 (PST) Sender: Vincent Mailhol From: Vincent Mailhol To: Marc Kleine-Budde , linux-can@vger.kernel.org Cc: Oliver Neukum , Wolfgang Grandegger , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Frank Jungclaus , socketcan@esd.eu, Yasushi SHOJI , =?utf-8?q?Stefan_M=C3=A4tje?= , Hangyu Hua , Oliver Hartkopp , Peter Fink , Jeroen Hofstee , =?utf-8?q?Christoph_M=C3=B6hring?= , John Whittington , Vasanth Sadhasivan , Jimmy Assarsson , Anssi Hannula , Pavel Skripkin , Stephane Grosjean , Wolfram Sang , "Gustavo A . R . Silva" , Julia Lawall , Dongliang Mu , Sebastian Haas , Maximilian Schneider , Daniel Berglund , Olivier Sobrie , =?utf-8?b?UmVtaWdpdXN6IEtvxYLFgsSFdGFq?= , Jakob Unterwurzacher , Martin Elshuber , Bernd Krumboeck , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Stern , linux-usb@vger.kernel.org, Vincent Mailhol Subject: [PATCH v2 7/9] can: usb_8dev: usb_8dev_disconnect(): fix NULL pointer dereference Date: Sat, 10 Dec 2022 18:01:55 +0900 Message-Id: <20221210090157.793547-8-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> References: <20221203133159.94414-1-mailhol.vincent@wanadoo.fr> <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org usb_8dev sets the driver's priv data to NULL before waiting for the completion of outsdanding urbs. This can results in NULL pointer dereference, c.f. [1] and [2]. Remove the call to usb_set_intfdata(intf, NULL). The core will take care of setting it to NULL after usb_8dev_disconnect() at [3]. [1] c/27ef17849779 ("usb: add usb_set_intfdata() documentation") Link: https://git.kernel.org/gregkh/usb/c/27ef17849779 [2] thread about usb_set_intfdata() on linux-usb mailing. Link: https://lore.kernel.org/linux-usb/Y4OD70GD4KnoRk0k@rowland.harvard.edu/ [3] function usb_unbind_interface() from drivers/usb/core/driver.c Link: https://elixir.bootlin.com/linux/v6.0/source/drivers/usb/core/driver.c#L497 Fixes: 0024d8ad1639 ("can: usb_8dev: Add support for USB2CAN interface from 8 devices") Signed-off-by: Vincent Mailhol --- drivers/net/can/usb/usb_8dev.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/drivers/net/can/usb/usb_8dev.c b/drivers/net/can/usb/usb_8dev.c index 8a5596ce4e46..ae618809fc05 100644 --- a/drivers/net/can/usb/usb_8dev.c +++ b/drivers/net/can/usb/usb_8dev.c @@ -990,8 +990,6 @@ static void usb_8dev_disconnect(struct usb_interface *intf) { struct usb_8dev_priv *priv = usb_get_intfdata(intf); - usb_set_intfdata(intf, NULL); - if (priv) { netdev_info(priv->netdev, "device disconnected\n"); From patchwork Sat Dec 10 09:01:56 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Mailhol X-Patchwork-Id: 13070278 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B806EC10F1B for ; Sat, 10 Dec 2022 09:06:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230076AbiLJJGV (ORCPT ); Sat, 10 Dec 2022 04:06:21 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46486 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229915AbiLJJFM (ORCPT ); Sat, 10 Dec 2022 04:05:12 -0500 Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 65C09275D5; Sat, 10 Dec 2022 01:03:46 -0800 (PST) Received: by mail-pj1-x1033.google.com with SMTP id 3-20020a17090a098300b00219041dcbe9so7382602pjo.3; Sat, 10 Dec 2022 01:03:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:from:to:cc:subject:date :message-id:reply-to; bh=+JLuq6z6RC38yxJgv0nky22X6DCSZ/hpLwA+DNaYB3g=; b=pYzKZaA9CAYA1lV0aFDqGItcg2wPbv7kFZNxnILtD51hI2Z0Slg+qdAQ8nV1HCcfSA 3p3xy/O3vBdiRfLdB+vj6Ksz9HnYQ4tndul1j1Kus7zt80bmzNr2C2YLRX/tZvXrfkDt qUaV1cJq+DcbxSf1zI+/q5Joe+oQ87GTDXGlZFhO1vrjILUOHuORDxcE7IAswjElSI7d le6Fl9k5YU3CJ3i6FnIn4RsAlFopeglX3XGEIIIgRNTu5/mqb+gTpi6IRJUwzMzelCed facKMtOZwVa5+ygm2R2ua7ITJc3cKCdpWfxXJjFE0bq10g5KfSv9/5tMS9zsdbeoRnTO 3EGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:sender:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=+JLuq6z6RC38yxJgv0nky22X6DCSZ/hpLwA+DNaYB3g=; b=Jh5Ic65uP4swDCyt6PC9bIF7UZf2cFCQjEseRPnM7Dh9beoDzT1r3qeC+vzUAgK4/L GLyQFJR1jFB+Rvq31F3rP2PXGyq+K6cTWufqqwUOwS+UT109Zuuh8kKC4kc8tQ+KUzGL oSfMelFoMMkUIlP5di3jqfK8vQ+CNCf31oUFLWzAmYzP9XLA+eS+uLdWe9nc1aC6jXEb S2zyZhQ8eZyaGqblDHkeSr3fIcnkEYdOszQw44/yftxPZrH4YbtfMXDPhM0V0G3tyJs4 ckCrdx7FpjCnARLyifpVq52V720U9Ra4xRbnEt++Eom2qFmdK3J/jh14ItpKYqIjh7je apLQ== X-Gm-Message-State: ANoB5plmAfaVw6oOYflOr4cDVW8RaGcdbtWal+2dtppzUhCTwr7Etjth 3vghoyYwpxGDFAYZkM2vGO4= X-Google-Smtp-Source: AA0mqf5GYgzbWRjQtqXiUGu1YTp8NbJSFZIcWwB5I4kyyqbNyUl5s6xLM9EWIeUdmcdrqCnGmQYpzg== X-Received: by 2002:a17:903:120b:b0:188:eec0:f1e with SMTP id l11-20020a170903120b00b00188eec00f1emr11952017plh.63.1670663025813; Sat, 10 Dec 2022 01:03:45 -0800 (PST) Received: from localhost.localdomain (124x33x176x97.ap124.ftth.ucom.ne.jp. [124.33.176.97]) by smtp.gmail.com with ESMTPSA id u7-20020a17090282c700b00186a2444a43sm2549481plz.27.2022.12.10.01.03.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Dec 2022 01:03:45 -0800 (PST) Sender: Vincent Mailhol From: Vincent Mailhol To: Marc Kleine-Budde , linux-can@vger.kernel.org Cc: Oliver Neukum , Wolfgang Grandegger , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Frank Jungclaus , socketcan@esd.eu, Yasushi SHOJI , =?utf-8?q?Stefan_M=C3=A4tje?= , Hangyu Hua , Oliver Hartkopp , Peter Fink , Jeroen Hofstee , =?utf-8?q?Christoph_M=C3=B6hring?= , John Whittington , Vasanth Sadhasivan , Jimmy Assarsson , Anssi Hannula , Pavel Skripkin , Stephane Grosjean , Wolfram Sang , "Gustavo A . R . Silva" , Julia Lawall , Dongliang Mu , Sebastian Haas , Maximilian Schneider , Daniel Berglund , Olivier Sobrie , =?utf-8?b?UmVtaWdpdXN6IEtvxYLFgsSFdGFq?= , Jakob Unterwurzacher , Martin Elshuber , Bernd Krumboeck , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Stern , linux-usb@vger.kernel.org, Vincent Mailhol Subject: [PATCH v2 8/9] can: usb: remove useless check on driver data Date: Sat, 10 Dec 2022 18:01:56 +0900 Message-Id: <20221210090157.793547-9-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> References: <20221203133159.94414-1-mailhol.vincent@wanadoo.fr> <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org Many of the can usb drivers checks in their usb_driver::disconnect() whether the driver data is NULL or not. This check only makes sense if the disconnect function can be called more than one time. This is not the case for can usb drivers. Remove all checks toward drivers priv data in disconnect(). Signed-off-by: Vincent Mailhol --- drivers/net/can/usb/ems_usb.c | 14 ++++++-------- drivers/net/can/usb/esd_usb.c | 16 +++++++--------- drivers/net/can/usb/gs_usb.c | 5 ----- drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c | 7 +------ drivers/net/can/usb/ucan.c | 6 ++---- drivers/net/can/usb/usb_8dev.c | 11 ++++------- 6 files changed, 20 insertions(+), 39 deletions(-) diff --git a/drivers/net/can/usb/ems_usb.c b/drivers/net/can/usb/ems_usb.c index c64cb40ac8de..8bd555eb741f 100644 --- a/drivers/net/can/usb/ems_usb.c +++ b/drivers/net/can/usb/ems_usb.c @@ -1062,18 +1062,16 @@ static void ems_usb_disconnect(struct usb_interface *intf) { struct ems_usb *dev = usb_get_intfdata(intf); - if (dev) { - unregister_netdev(dev->netdev); + unregister_netdev(dev->netdev); - unlink_all_urbs(dev); + unlink_all_urbs(dev); - usb_free_urb(dev->intr_urb); + usb_free_urb(dev->intr_urb); - kfree(dev->intr_in_buffer); - kfree(dev->tx_msg_buffer); + kfree(dev->intr_in_buffer); + kfree(dev->tx_msg_buffer); - free_candev(dev->netdev); - } + free_candev(dev->netdev); } /* usb specific object needed to register this driver with the usb subsystem */ diff --git a/drivers/net/can/usb/esd_usb.c b/drivers/net/can/usb/esd_usb.c index f3006c6dc5d6..775ab704a295 100644 --- a/drivers/net/can/usb/esd_usb.c +++ b/drivers/net/can/usb/esd_usb.c @@ -1127,17 +1127,15 @@ static void esd_usb_disconnect(struct usb_interface *intf) device_remove_file(&intf->dev, &dev_attr_hardware); device_remove_file(&intf->dev, &dev_attr_nets); - if (dev) { - for (i = 0; i < dev->net_count; i++) { - if (dev->nets[i]) { - netdev = dev->nets[i]->netdev; - unregister_netdev(netdev); - free_candev(netdev); - } + for (i = 0; i < dev->net_count; i++) { + if (dev->nets[i]) { + netdev = dev->nets[i]->netdev; + unregister_netdev(netdev); + free_candev(netdev); } - unlink_all_urbs(dev); - kfree(dev); } + unlink_all_urbs(dev); + kfree(dev); } /* usb specific object needed to register this driver with the usb subsystem */ diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c index 97b1da8fd19f..40190816e313 100644 --- a/drivers/net/can/usb/gs_usb.c +++ b/drivers/net/can/usb/gs_usb.c @@ -1458,11 +1458,6 @@ static void gs_usb_disconnect(struct usb_interface *intf) struct gs_usb *dev = usb_get_intfdata(intf); unsigned int i; - if (!dev) { - dev_err(&intf->dev, "Disconnect (nodata)\n"); - return; - } - for (i = 0; i < GS_MAX_INTF; i++) if (dev->canch[i]) gs_destroy_candev(dev->canch[i]); diff --git a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c index dad916b3288e..9e83b61db96b 100644 --- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c +++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c @@ -979,12 +979,7 @@ static int kvaser_usb_probe(struct usb_interface *intf, static void kvaser_usb_disconnect(struct usb_interface *intf) { - struct kvaser_usb *dev = usb_get_intfdata(intf); - - if (!dev) - return; - - kvaser_usb_remove_interfaces(dev); + kvaser_usb_remove_interfaces(usb_get_intfdata(intf)); } static struct usb_driver kvaser_usb_driver = { diff --git a/drivers/net/can/usb/ucan.c b/drivers/net/can/usb/ucan.c index 429b3519ee7f..205941122f9e 100644 --- a/drivers/net/can/usb/ucan.c +++ b/drivers/net/can/usb/ucan.c @@ -1579,10 +1579,8 @@ static void ucan_disconnect(struct usb_interface *intf) { struct ucan_priv *up = usb_get_intfdata(intf); - if (up) { - unregister_candev(up->netdev); - free_candev(up->netdev); - } + unregister_candev(up->netdev); + free_candev(up->netdev); } static struct usb_device_id ucan_table[] = { diff --git a/drivers/net/can/usb/usb_8dev.c b/drivers/net/can/usb/usb_8dev.c index ae618809fc05..4d80049ebff7 100644 --- a/drivers/net/can/usb/usb_8dev.c +++ b/drivers/net/can/usb/usb_8dev.c @@ -990,14 +990,11 @@ static void usb_8dev_disconnect(struct usb_interface *intf) { struct usb_8dev_priv *priv = usb_get_intfdata(intf); - if (priv) { - netdev_info(priv->netdev, "device disconnected\n"); - - unregister_netdev(priv->netdev); - unlink_all_urbs(priv); - free_candev(priv->netdev); - } + netdev_info(priv->netdev, "device disconnected\n"); + unregister_netdev(priv->netdev); + unlink_all_urbs(priv); + free_candev(priv->netdev); } static struct usb_driver usb_8dev_driver = { From patchwork Sat Dec 10 09:01:57 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vincent Mailhol X-Patchwork-Id: 13070279 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 01090C4708D for ; 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[124.33.176.97]) by smtp.gmail.com with ESMTPSA id u7-20020a17090282c700b00186a2444a43sm2549481plz.27.2022.12.10.01.03.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 10 Dec 2022 01:03:52 -0800 (PST) Sender: Vincent Mailhol From: Vincent Mailhol To: Marc Kleine-Budde , linux-can@vger.kernel.org Cc: Oliver Neukum , Wolfgang Grandegger , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Frank Jungclaus , socketcan@esd.eu, Yasushi SHOJI , =?utf-8?q?Stefan_M=C3=A4tje?= , Hangyu Hua , Oliver Hartkopp , Peter Fink , Jeroen Hofstee , =?utf-8?q?Christoph_M=C3=B6hring?= , John Whittington , Vasanth Sadhasivan , Jimmy Assarsson , Anssi Hannula , Pavel Skripkin , Stephane Grosjean , Wolfram Sang , "Gustavo A . R . Silva" , Julia Lawall , Dongliang Mu , Sebastian Haas , Maximilian Schneider , Daniel Berglund , Olivier Sobrie , =?utf-8?b?UmVtaWdpdXN6IEtvxYLFgsSFdGFq?= , Jakob Unterwurzacher , Martin Elshuber , Bernd Krumboeck , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Alan Stern , linux-usb@vger.kernel.org, Vincent Mailhol Subject: [PATCH v2 9/9] can: etas_es58x and peak_usb: remove useless call to usb_set_intfdata() Date: Sat, 10 Dec 2022 18:01:57 +0900 Message-Id: <20221210090157.793547-10-mailhol.vincent@wanadoo.fr> X-Mailer: git-send-email 2.37.4 In-Reply-To: <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> References: <20221203133159.94414-1-mailhol.vincent@wanadoo.fr> <20221210090157.793547-1-mailhol.vincent@wanadoo.fr> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-Delegate: kuba@kernel.org The core sets the usb_interface to NULL in [1]. Also setting it to NULL in usb_driver::disconnect() is useless. Remove the call to usb_set_intfdata(intf, NULL) in the disconnect function of all drivers under drivers/net/can/usb. [1] function usb_unbind_interface() from drivers/usb/core/driver.c Link: https://elixir.bootlin.com/linux/v6.0/source/drivers/usb/core/driver.c#L497 Signed-off-by: Vincent Mailhol --- drivers/net/can/usb/etas_es58x/es58x_core.c | 1 - drivers/net/can/usb/peak_usb/pcan_usb_core.c | 2 -- 2 files changed, 3 deletions(-) diff --git a/drivers/net/can/usb/etas_es58x/es58x_core.c b/drivers/net/can/usb/etas_es58x/es58x_core.c index 0c7f7505632c..4924f0be3510 100644 --- a/drivers/net/can/usb/etas_es58x/es58x_core.c +++ b/drivers/net/can/usb/etas_es58x/es58x_core.c @@ -2257,7 +2257,6 @@ static void es58x_disconnect(struct usb_interface *intf) es58x_free_netdevs(es58x_dev); es58x_free_urbs(es58x_dev); devlink_free(priv_to_devlink(es58x_dev)); - usb_set_intfdata(intf, NULL); } static struct usb_driver es58x_driver = { diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_core.c b/drivers/net/can/usb/peak_usb/pcan_usb_core.c index 1d996d3320fe..c15200aebfb6 100644 --- a/drivers/net/can/usb/peak_usb/pcan_usb_core.c +++ b/drivers/net/can/usb/peak_usb/pcan_usb_core.c @@ -974,8 +974,6 @@ static void peak_usb_disconnect(struct usb_interface *intf) free_candev(netdev); dev_info(&intf->dev, "%s removed\n", name); } - - usb_set_intfdata(intf, NULL); } /*