Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755156AbbGUNvK (ORCPT ); Tue, 21 Jul 2015 09:51:10 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:58269 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752778AbbGUNvH (ORCPT ); Tue, 21 Jul 2015 09:51:07 -0400 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: mwifiex: usb: Fix double add error when submitting rx urb From: Kalle Valo In-Reply-To: <1435540058-11922-1-git-send-email-reyad.attiyat@gmail.com> To: Reyad Attiyat Cc: akarwar@marvell.com, patila@marvell.com, bzhao@marvell.com, linux-wireless@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Reyad Attiyat Message-Id: <20150721135105.B4DCB1410D3@smtp.codeaurora.org> Date: Tue, 21 Jul 2015 13:51:05 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5239 Lines: 60 > There is an error that can occur where the driver adds the same URB to USB submission list twice. > This happens since mwifiex_usb_submit_rem_rx can submit packets at same time as an rx urb complete callback. > This causes list corruption and is fixed by not setting the skb to NULL when submitting an rx packet. > > [ 84.461242] WARNING: CPU: 1 PID: 748 at lib/list_debug.c:36 __list_add+0xcb/0xd0() > [ 84.461245] list_add double add: new=ffff8800c92b0c50, prev=ffff8800c92b0c50, next=ffff8800ced6c430. > [ 84.461247] Modules linked in: rfcomm fuse cmac nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ebtable_nat ebtable_broute bridge stp llc ebtable_filter ebtables ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_security ip6table_raw ip6table_filter ip6_tables iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack bnep iptable_mangle iptable_security iptable_raw btusb btintel bluetooth mwifiex_usb mwifiex x86_pkg_temp_thermal cfg80211 coretemp r8712u(C) kvm_intel kvm hid_sensor_als hid_sensor_incl_3d hid_sensor_rotation hid_sensor_magn_3d hid_sensor_accel_3d hid_sensor_gyro_3d hid_sensor_trigger hid_sensor_iio_common industrialio_triggered_buffer kfifo_buf rfkill iTCO_wdt industrialio iTCO_vendor_support > [ 84.461316] crc32_pclmul crc32c_intel ghash_clmulni_intel microcode snd_hda_codec_realtek vfat snd_hda_codec_generic fat snd_hda_codec_hdmi snd_hda_intel snd_hda_controller uvcvideo snd_hda_codec videobuf2_vmalloc videobuf2_memops snd_hwdep videobuf2_core snd_hda_core joydev v4l2_common videodev hid_sensor_hub snd_seq hid_multitouch media snd_seq_device snd_pcm snd_timer mei_me snd i2c_i801 lpc_ich mei soundcore tpm_infineon tpm_tis tpm i2c_hid i2c_designware_platform i2c_designware_core nfsd auth_rpcgss nfs_acl lockd grace sunrpc sch_fq_codel i915 i2c_algo_bit drm_kms_helper drm xhci_pci xhci_hcd ehci_pci sd_mod ehci_hcd video > [ 84.461383] CPU: 1 PID: 748 Comm: kworker/u9:0 Tainted: G C 4.1.0-rc5+ #163 > [ 84.461386] Hardware name: Microsoft Corporation Surface Pro 2/Surface Pro 2, BIOS 2.05.0250 04/10/2015 > [ 84.461396] Workqueue: MWIFIEX_RX_WORK_QUEUE mwifiex_rx_work_queue [mwifiex] > [ 84.461399] ffffffff81a8150e ffff8801174cf8e8 ffffffff817df830 0000000000000000 > [ 84.461405] ffff8801174cf938 ffff8801174cf928 ffffffff810a54ba ffff8800c86bd750 > [ 84.461410] ffff8800c92b0c50 ffff8800c92b0c50 ffff8800ced6c430 ffff88010c057178 > [ 84.461416] Call Trace: > [ 84.461421] [] dump_stack+0x4f/0x7b > [ 84.461428] [] warn_slowpath_common+0x8a/0xc0 > [ 84.461432] [] warn_slowpath_fmt+0x46/0x50 > [ 84.461436] [] __list_add+0xcb/0xd0 > [ 84.461442] [] ? usb_hcd_link_urb_to_ep+0x2a/0xa0 > [ 84.461446] [] usb_hcd_link_urb_to_ep+0x80/0xa0 > [ 84.461459] [] prepare_transfer+0xaa/0x130 [xhci_hcd] > [ 84.461470] [] xhci_queue_bulk_tx+0xb7/0x7a0 [xhci_hcd] > [ 84.461480] [] ? xhci_urb_enqueue+0x50f/0x660 [xhci_hcd] > [ 84.461489] [] ? xhci_urb_enqueue+0x50f/0x660 [xhci_hcd] > [ 84.461498] [] xhci_urb_enqueue+0x5c5/0x660 [xhci_hcd] > [ 84.461503] [] usb_hcd_submit_urb+0x93/0xa70 > [ 84.461507] [] ? __alloc_skb+0x78/0x1f0 > [ 84.461511] [] ? __kmalloc_reserve.isra.26+0x31/0x90 > [ 84.461515] [] ? __alloc_skb+0x4c/0x1f0 > [ 84.461519] [] ? __alloc_skb+0x8c/0x1f0 > [ 84.461523] [] ? skb_dequeue+0x5d/0x80 > [ 84.461527] [] usb_submit_urb+0x42e/0x5f0 > [ 84.461531] [] ? __alloc_rx_skb+0x39/0x100 > [ 84.461536] [] mwifiex_usb_submit_rx_urb+0xb2/0x170 [mwifiex_usb] > [ 84.461542] [] mwifiex_usb_submit_rem_rx_urbs+0x45/0x50 [mwifiex_usb] > [ 84.461550] [] mwifiex_rx_work_queue+0x10e/0x140 [mwifiex] > [ 84.461556] [] process_one_work+0x229/0x890 > [ 84.461559] [] ? process_one_work+0x18c/0x890 > [ 84.461565] [] worker_thread+0x53/0x470 > [ 84.461569] [] ? process_one_work+0x890/0x890 > [ 84.461572] [] kthread+0xf2/0x110 > [ 84.461577] [] ? trace_hardirqs_on+0xd/0x10 > [ 84.461581] [] ? kthread_create_on_node+0x230/0x230 > [ 84.461586] [] ret_from_fork+0x42/0x70 > [ 84.461590] [] ? kthread_create_on_node+0x230/0x230 > [ 84.461593] ---[ end trace 65103af5e6fb3444 ]--- > > Signed-off-by: Reyad Attiyat > Acked-by: Amitkumar Karwar Thanks, applied to wireless-drivers-next.git. Kalle Valo -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/