On Fri, Aug 07, 2015 at 08:33:57AM +0000, Amitkumar Karwar wrote: > Hi Kalle, > > > From: Kalle Valo [mailto:kvalo@xxxxxxxxxxxxxx] > > Sent: Friday, August 07, 2015 1:56 PM > > To: Amitkumar Karwar > > Cc: linux-wireless@xxxxxxxxxxxxxxx; Cathy Luo; Nishant Sarmukadam; > > stable@xxxxxxxxxxxxxxx; Reyad Attiyat > > Subject: Re: [PATCH 4.2 1/3] mwifiex: usb: Fix double add error when > > submitting rx urb > > > > Amitkumar Karwar <akarwar@xxxxxxxxxxx> writes: > > > > > From: Reyad Attiyat <reyad.attiyat@xxxxxxxxx> > > > > > > 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] [<ffffffff817df830>] dump_stack+0x4f/0x7b > > > [ 84.461428] [<ffffffff810a54ba>] warn_slowpath_common+0x8a/0xc0 > > > [ 84.461432] [<ffffffff810a5536>] warn_slowpath_fmt+0x46/0x50 > > > [ 84.461436] [<ffffffff814109fb>] __list_add+0xcb/0xd0 > > > [ 84.461442] [<ffffffff815c551a>] ? > > usb_hcd_link_urb_to_ep+0x2a/0xa0 > > > [ 84.461446] [<ffffffff815c5570>] usb_hcd_link_urb_to_ep+0x80/0xa0 > > > [ 84.461459] [<ffffffffa004318a>] prepare_transfer+0xaa/0x130 > > [xhci_hcd] > > > [ 84.461470] [<ffffffffa0044cf7>] xhci_queue_bulk_tx+0xb7/0x7a0 > > [xhci_hcd] > > > [ 84.461480] [<ffffffffa003b67f>] ? xhci_urb_enqueue+0x50f/0x660 > > [xhci_hcd] > > > [ 84.461489] [<ffffffffa003b67f>] ? xhci_urb_enqueue+0x50f/0x660 > > [xhci_hcd] > > > [ 84.461498] [<ffffffffa003b735>] xhci_urb_enqueue+0x5c5/0x660 > > [xhci_hcd] > > > [ 84.461503] [<ffffffff815c7ad3>] usb_hcd_submit_urb+0x93/0xa70 > > > [ 84.461507] [<ffffffff8168dde8>] ? __alloc_skb+0x78/0x1f0 > > > [ 84.461511] [<ffffffff8168d301>] ? > > __kmalloc_reserve.isra.26+0x31/0x90 > > > [ 84.461515] [<ffffffff8168ddbc>] ? __alloc_skb+0x4c/0x1f0 > > > [ 84.461519] [<ffffffff8168ddfc>] ? __alloc_skb+0x8c/0x1f0 > > > [ 84.461523] [<ffffffff8168badd>] ? skb_dequeue+0x5d/0x80 > > > [ 84.461527] [<ffffffff815c987e>] usb_submit_urb+0x42e/0x5f0 > > > [ 84.461531] [<ffffffff816931d9>] ? __alloc_rx_skb+0x39/0x100 > > > [ 84.461536] [<ffffffffa05aa372>] > > mwifiex_usb_submit_rx_urb+0xb2/0x170 [mwifiex_usb] > > > [ 84.461542] [<ffffffffa05aa5f5>] > > mwifiex_usb_submit_rem_rx_urbs+0x45/0x50 [mwifiex_usb] > > > [ 84.461550] [<ffffffffa07094be>] mwifiex_rx_work_queue+0x10e/0x140 > > [mwifiex] > > > [ 84.461556] [<ffffffff810c4429>] process_one_work+0x229/0x890 > > > [ 84.461559] [<ffffffff810c438c>] ? process_one_work+0x18c/0x890 > > > [ 84.461565] [<ffffffff810c4ae3>] worker_thread+0x53/0x470 > > > [ 84.461569] [<ffffffff810c4a90>] ? process_one_work+0x890/0x890 > > > [ 84.461572] [<ffffffff810cb162>] kthread+0xf2/0x110 > > > [ 84.461577] [<ffffffff811031ad>] ? trace_hardirqs_on+0xd/0x10 > > > [ 84.461581] [<ffffffff810cb070>] ? > > kthread_create_on_node+0x230/0x230 > > > [ 84.461586] [<ffffffff817e9662>] ret_from_fork+0x42/0x70 > > > [ 84.461590] [<ffffffff810cb070>] ? > > kthread_create_on_node+0x230/0x230 > > > [ 84.461593] ---[ end trace 65103af5e6fb3444 ]--- > > > > > > Cc: stable@xxxxxxxxxxxxxxx # 3.19+ > > > Signed-off-by: Reyad Attiyat <reyad.attiyat@xxxxxxxxx> > > > Acked-by: Amitkumar Karwar <akarwar@xxxxxxxxxxx> > > > Signed-off-by: Kalle Valo <kvalo@xxxxxxxxxxxxxx> > > > > What do you want to do with these patches exactly? These three are > > already in wireless-drivers-next so I cannot apply to wireless-drivers > > anymore (and that's why I cannot push them to 4.2). > > > > These are some critical stability fixes. I want them to be merged to 3.19 onwards stable kernel releases. > I have CCed stable@xxxxxxxxxxxxxxx here. Let me know if I missed anything. <formletter> This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read Documentation/stable_kernel_rules.txt for how to do this properly. </formletter> -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
