* Kernel Panic on high bandwidth transfer over wifi
@ 2018-08-29 11:42 Nathaniel Munk
2018-08-29 12:09 ` Willy Tarreau
2018-08-29 15:29 ` Eric Dumazet
0 siblings, 2 replies; 4+ messages in thread
From: Nathaniel Munk @ 2018-08-29 11:42 UTC (permalink / raw)
To: netdev@vger.kernel.org
Hi all,
I'm running Arch Linux on kernel 4.18.5 (same issue on both arch-provided kernel and mainline built-from-source). There is an issue whereby the kernel crashes when transferring at high bandwidths (approx 6mB/s) over a specific wifi connection. I can only reproduce the issue when using the Personal Hotspot on my iPhone 6S+, but can reproduce it very consistently on that connection.
More often than not, any download reaching this speed will cause a panic, but if the download is immediately terminated at the first error the system can recover (and doing this I have obtained the attached logs). Unfortunately, I have not had access to a second machine to obtain the netconsole printout of the panic.
As above, high-bandwidth transfers on other wifi networks do not cause the issue (nor on ethernet connections).
As you can see from the attached log, the issue appears at tcp_recvmsg+0x579 and net_tx_action+0x1fe. At both these positions (net/ipv4/tcp.c:2000 and net/core/dev.c:4279 in mainline 4.18.5), a member of the skb struct is called.
Thank you for your time (and I apologize if this is spurious or badly worded, this is my first bug report), and please don't hesitate to let me know if there's anything else I can do to help work this out.
Regards,
-------------------
Nathaniel Munk
nathaniel@munk.com.au
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Kernel Panic on high bandwidth transfer over wifi
2018-08-29 11:42 Kernel Panic on high bandwidth transfer over wifi Nathaniel Munk
@ 2018-08-29 12:09 ` Willy Tarreau
2018-08-29 12:12 ` Nathaniel Munk
2018-08-29 15:29 ` Eric Dumazet
1 sibling, 1 reply; 4+ messages in thread
From: Willy Tarreau @ 2018-08-29 12:09 UTC (permalink / raw)
To: Nathaniel Munk; +Cc: netdev@vger.kernel.org
On Wed, Aug 29, 2018 at 11:42:44AM +0000, Nathaniel Munk wrote:
> As you can see from the attached log
You apparently forgot to attach the log.
Willy
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Kernel Panic on high bandwidth transfer over wifi
2018-08-29 12:09 ` Willy Tarreau
@ 2018-08-29 12:12 ` Nathaniel Munk
0 siblings, 0 replies; 4+ messages in thread
From: Nathaniel Munk @ 2018-08-29 12:12 UTC (permalink / raw)
To: Willy Tarreau, netdev@vger.kernel.org
[-- Attachment #1: Type: text/plain, Size: 404 bytes --]
Of course I did, sorry.
-------------------
Nathaniel Munk
nathaniel@munk.com.au
0435 726 099
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On August 29, 2018 10:09 PM, Willy Tarreau <w@1wt.eu> wrote:
> On Wed, Aug 29, 2018 at 11:42:44AM +0000, Nathaniel Munk wrote:
>
> > As you can see from the attached log
>
> You apparently forgot to attach the log.
>
> Willy
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: dmesg.log --]
[-- Type: text/x-log; name="dmesg.log", Size: 14254 bytes --]
[ 1242.620637] TCP recvmsg seq # bug: copied 93359823, seq 1, rcvnxt 93359D8F, fl 80000000
[ 1242.620700] WARNING: CPU: 0 PID: 10255 at net/ipv4/tcp.c:2003 tcp_recvmsg+0x579/0xc70
[ 1242.620704] Modules linked in: ccm nf_tables_set nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat_ipv6 nft_chain_nat_ipv4 nf_tables ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack libcrc32c ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter bpfilter 8021q mrp ipheth btusb btrtl btbcm btintel uvcvideo bluetooth videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev media ecdh_generic joydev mousedev nls_iso8859_1 nls_cp437 vfat fat arc4 snd_hda_codec_hdmi
[ 1242.620797] snd_soc_skl snd_soc_skl_ipc iwlmvm snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_ext_core snd_soc_acpi snd_soc_core mei_wdt mac80211 snd_hda_codec_realtek snd_compress iTCO_wdt ac97_bus snd_hda_codec_generic snd_pcm_dmaengine iTCO_vendor_support intel_rapl snd_hda_intel x86_pkg_temp_thermal intel_powerclamp snd_hda_codec coretemp kvm_intel snd_hda_core wmi_bmof iwlwifi kvm cfg80211 snd_hwdep input_leds snd_pcm thinkpad_acpi snd_timer psmouse irqbypass nvram mei_me intel_cstate rfkill intel_uncore e1000e intel_rapl_perf mei i2c_i801 snd intel_pch_thermal soundcore ac tpm_tis tpm_tis_core tpm rng_core led_class evdev battery wmi rtc_cmos mac_hid pcc_cpufreq ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 fscrypto algif_skcipher af_alg dm_crypt dm_mod sd_mod crct10dif_pclmul crc32_pclmul
[ 1242.620885] crc32c_intel ghash_clmulni_intel pcbc serio_raw atkbd libps2 ahci libahci aesni_intel libata aes_x86_64 crypto_simd xhci_pci cryptd glue_helper scsi_mod xhci_hcd i8042 serio hid_generic usbhid usbcore usb_common hid intel_agp i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm intel_gtt agpgart
[ 1242.620933] CPU: 0 PID: 10255 Comm: IOCP Thread 0 Tainted: G U W 4.18.5-arch1-1-ARCH #1
[ 1242.620937] Hardware name: LENOVO 20FN001CAU/20FN001CAU, BIOS R06ET59W (1.33 ) 02/27/2018
[ 1242.620949] RIP: 0010:tcp_recvmsg+0x579/0xc70
[ 1242.620951] Code: fb ff ff 4c 89 e0 41 8b 8d 38 05 00 00 44 8b 44 24 2c 89 de 48 c7 c7 28 f5 6f 9a 4c 89 54 24 08 48 89 44 24 10 e8 11 f8 9f ff <0f> 0b 48 8b 44 24 10 4c 8b 54 24 08 8b 4c 24 3c 39 4c 24 38 0f 8c
[ 1242.621003] RSP: 0018:ffffb0de41223bb0 EFLAGS: 00010282
[ 1242.621007] RAX: 0000000000000000 RBX: 0000000093359823 RCX: 0000000000000001
[ 1242.621010] RDX: 0000000080000001 RSI: ffffffff9a6811ce RDI: 00000000ffffffff
[ 1242.621013] RBP: ffffb0de41223c70 R08: ffffffff99cddf10 R09: 00000000000003c4
[ 1242.621016] R10: 0000000000000008 R11: ffffffff9ae04f2d R12: ffff8a6a70e76a00
[ 1242.621018] R13: ffff8a6a39ea18c0 R14: 0000000000000000 R15: ffff8a6a39ea1dfc
[ 1242.621022] FS: 0000000000000000(0000) GS:ffff8a6a81400000(0063) knlGS:00000000ed455b40
[ 1242.621026] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
[ 1242.621028] CR2: 00000000e9f68000 CR3: 00000002347aa004 CR4: 00000000003606f0
[ 1242.621032] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1242.621035] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1242.621038] Call Trace:
[ 1242.621049] ? update_rq_clock+0x33/0x120
[ 1242.621053] ? compat_import_iovec+0x37/0xcd
[ 1242.621058] ? __switch_to_asm+0x40/0x70
[ 1242.621061] inet_recvmsg+0x5b/0x100
[ 1242.621066] ___sys_recvmsg+0xdd/0x1e0
[ 1242.621070] ? __switch_to_asm+0x34/0x70
[ 1242.621074] ? _raw_spin_unlock_irq+0x1d/0x30
[ 1242.621077] ? finish_task_switch+0x83/0x2c0
[ 1242.621080] ? tcp_keepalive_timer.cold.3+0x19/0x19
[ 1242.621084] ? tcp_poll+0x12e/0x260
[ 1242.621086] ? sock_poll+0x61/0xb0
[ 1242.621091] ? ep_item_poll.isra.1+0x40/0xc0
[ 1242.621095] ? ep_send_events_proc+0x7b/0x1a0
[ 1242.621098] ? __ia32_sys_epoll_ctl+0x20/0x20
[ 1242.621101] ? preempt_count_add+0x68/0xa0
[ 1242.621106] ? _raw_spin_lock_irqsave+0x25/0x50
[ 1242.621112] ? __fget+0x6e/0xa0
[ 1242.621116] __sys_recvmsg+0x54/0xa0
[ 1242.621124] __ia32_compat_sys_socketcall+0x174/0x300
[ 1242.621129] ? do_epoll_wait+0x8b/0xd0
[ 1242.621135] do_fast_syscall_32+0xa7/0x2a0
[ 1242.621139] entry_SYSENTER_compat+0x7f/0x91
[ 1242.621144] ---[ end trace dc996496c7568a8f ]---
[ 1242.621232] BUG: unable to handle kernel paging request at 000000020024cb72
[ 1242.621238] PGD 80000001f9fe0067 P4D 80000001f9fe0067 PUD 0
[ 1242.621244] Oops: 0000 [#1] PREEMPT SMP PTI
[ 1242.621250] CPU: 0 PID: 10255 Comm: IOCP Thread 0 Tainted: G U W 4.18.5-arch1-1-ARCH #1
[ 1242.621252] Hardware name: LENOVO 20FN001CAU/20FN001CAU, BIOS R06ET59W (1.33 ) 02/27/2018
[ 1242.621258] RIP: 0010:tcp_drop+0x17/0x40
[ 1242.621259] Code: 00 e9 5b ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1f 44 00 00 8b 96 cc 00 00 00 48 8b 8e d0 00 00 00 b8 01 00 00 00 <66> 83 7c 11 06 00 66 0f 45 44 11 06 0f b7 c0 f0 01 87 a8 00 00 00
[ 1242.621299] RSP: 0018:ffffb0de41223b08 EFLAGS: 00010203
[ 1242.621303] RAX: 0000000000000001 RBX: ffff8a6a39ea18c0 RCX: 0000000100254102
[ 1242.621305] RDX: 00000000ffff8a6a RSI: ffff8a6a39ea1988 RDI: ffff8a6a39ea18c0
[ 1242.621306] RBP: ffff8a6a39ea1988 R08: 0000000000000000 R09: ffffffff99e8930e
[ 1242.621308] R10: ffff8a6a743f6310 R11: 0000000000000002 R12: ffff8a6a39ea1988
[ 1242.621310] R13: ffffffff99e92380 R14: 0000000000000000 R15: 00000000fffffff5
[ 1242.621312] FS: 0000000000000000(0000) GS:ffff8a6a81400000(0063) knlGS:00000000ed455b40
[ 1242.621315] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
[ 1242.621316] CR2: 000000020024cb72 CR3: 00000002347aa004 CR4: 00000000003606f0
[ 1242.621319] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1242.621321] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 1242.621323] Call Trace:
[ 1242.621332] tcp_rcv_established+0x10a/0x630
[ 1242.621339] tcp_v4_do_rcv+0x11e/0x1c0
[ 1242.621348] __release_sock+0x7c/0xc0
[ 1242.621354] release_sock+0x2b/0x90
[ 1242.621357] tcp_recvmsg+0x4dc/0xc70
[ 1242.621366] ? update_rq_clock+0x33/0x120
[ 1242.621374] ? compat_import_iovec+0x37/0xcd
[ 1242.621381] ? __switch_to_asm+0x40/0x70
[ 1242.621386] inet_recvmsg+0x5b/0x100
[ 1242.621394] ___sys_recvmsg+0xdd/0x1e0
[ 1242.621399] ? __switch_to_asm+0x34/0x70
[ 1242.621403] ? _raw_spin_unlock_irq+0x1d/0x30
[ 1242.621407] ? finish_task_switch+0x83/0x2c0
[ 1242.621412] ? tcp_keepalive_timer.cold.3+0x19/0x19
[ 1242.621420] ? tcp_poll+0x12e/0x260
[ 1242.621423] ? sock_poll+0x61/0xb0
[ 1242.621434] ? ep_item_poll.isra.1+0x40/0xc0
[ 1242.621438] ? ep_send_events_proc+0x7b/0x1a0
[ 1242.621442] ? __ia32_sys_epoll_ctl+0x20/0x20
[ 1242.621445] ? preempt_count_add+0x68/0xa0
[ 1242.621450] ? _raw_spin_lock_irqsave+0x25/0x50
[ 1242.621458] ? __fget+0x6e/0xa0
[ 1242.621462] __sys_recvmsg+0x54/0xa0
[ 1242.621469] __ia32_compat_sys_socketcall+0x174/0x300
[ 1242.621473] ? do_epoll_wait+0x8b/0xd0
[ 1242.621480] do_fast_syscall_32+0xa7/0x2a0
[ 1242.621484] entry_SYSENTER_compat+0x7f/0x91
[ 1242.621490] Modules linked in: ccm nf_tables_set nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat_ipv6 nft_chain_nat_ipv4 nf_tables ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack libcrc32c ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter bpfilter 8021q mrp ipheth btusb btrtl btbcm btintel uvcvideo bluetooth videobuf2_vmalloc videobuf2_memops videobuf2_v4l2 videobuf2_common videodev media ecdh_generic joydev mousedev nls_iso8859_1 nls_cp437 vfat fat arc4 snd_hda_codec_hdmi
[ 1242.621570] snd_soc_skl snd_soc_skl_ipc iwlmvm snd_soc_sst_ipc snd_soc_sst_dsp snd_hda_ext_core snd_soc_acpi snd_soc_core mei_wdt mac80211 snd_hda_codec_realtek snd_compress iTCO_wdt ac97_bus snd_hda_codec_generic snd_pcm_dmaengine iTCO_vendor_support intel_rapl snd_hda_intel x86_pkg_temp_thermal intel_powerclamp snd_hda_codec coretemp kvm_intel snd_hda_core wmi_bmof iwlwifi kvm cfg80211 snd_hwdep input_leds snd_pcm thinkpad_acpi snd_timer psmouse irqbypass nvram mei_me intel_cstate rfkill intel_uncore e1000e intel_rapl_perf mei i2c_i801 snd intel_pch_thermal soundcore ac tpm_tis tpm_tis_core tpm rng_core led_class evdev battery wmi rtc_cmos mac_hid pcc_cpufreq ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 fscrypto algif_skcipher af_alg dm_crypt dm_mod sd_mod crct10dif_pclmul crc32_pclmul
[ 1242.621647] crc32c_intel ghash_clmulni_intel pcbc serio_raw atkbd libps2 ahci libahci aesni_intel libata aes_x86_64 crypto_simd xhci_pci cryptd glue_helper scsi_mod xhci_hcd i8042 serio hid_generic usbhid usbcore usb_common hid intel_agp i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm intel_gtt agpgart
[ 1242.621693] CR2: 000000020024cb72
[ 1242.621698] ---[ end trace dc996496c7568a90 ]---
[ 1242.621709] RIP: 0010:tcp_drop+0x17/0x40
[ 1242.621712] Code: 00 e9 5b ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 0f 1f 44 00 00 8b 96 cc 00 00 00 48 8b 8e d0 00 00 00 b8 01 00 00 00 <66> 83 7c 11 06 00 66 0f 45 44 11 06 0f b7 c0 f0 01 87 a8 00 00 00
[ 1242.621758] RSP: 0018:ffffb0de41223b08 EFLAGS: 00010203
[ 1242.621763] RAX: 0000000000000001 RBX: ffff8a6a39ea18c0 RCX: 0000000100254102
[ 1242.621765] RDX: 00000000ffff8a6a RSI: ffff8a6a39ea1988 RDI: ffff8a6a39ea18c0
[ 1242.621767] RBP: ffff8a6a39ea1988 R08: 0000000000000000 R09: ffffffff99e8930e
[ 1242.621769] R10: ffff8a6a743f6310 R11: 0000000000000002 R12: ffff8a6a39ea1988
[ 1242.621771] R13: ffffffff99e92380 R14: 0000000000000000 R15: 00000000fffffff5
[ 1242.621773] FS: 0000000000000000(0000) GS:ffff8a6a81400000(0063) knlGS:00000000ed455b40
[ 1242.621775] CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
[ 1242.621777] CR2: 000000020024cb72 CR3: 00000002347aa004 CR4: 00000000003606f0
[ 1242.621780] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 1242.621782] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
--- Seperate Boot ---
[ 158.591645] WARNING: CPU: 2 PID: 29 at net/core/dev.c:4279 net_tx_action+0x1fe/0x260
[ 158.591651] Modules linked in: ccm nf_tables_set nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat_ipv6 nft_chain_nat_ipv4 nf_tables ebtable_nat ebtable_broute bridge stp llc ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_mangle ip6table_raw ip6table_security iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat iptable_mangle iptable_raw iptable_security nf_conntrack libcrc32c arc4 iwlmvm mac80211 ip_set nfnetlink ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter bpfilter btusb snd_soc_skl btrtl btbcm btintel uvcvideo bluetooth ipheth snd_soc_skl_ipc snd_soc_sst_ipc snd_soc_sst_dsp iwlwifi videobuf2_vmalloc snd_hda_ext_core videobuf2_memops videobuf2_v4l2 8021q mrp videobuf2_common
[ 158.591799] snd_soc_acpi intel_rapl snd_soc_core videodev x86_pkg_temp_thermal intel_powerclamp coretemp kvm_intel snd_hda_codec_hdmi nls_iso8859_1 media ecdh_generic nls_cp437 snd_compress joydev ac97_bus snd_hda_codec_realtek vfat snd_hda_codec_generic fat snd_pcm_dmaengine mousedev kvm snd_hda_intel cfg80211 snd_hda_codec wmi_bmof mei_wdt snd_hda_core snd_hwdep snd_pcm irqbypass intel_cstate iTCO_wdt tpm_tis iTCO_vendor_support intel_uncore psmouse tpm_tis_core thinkpad_acpi tpm intel_rapl_perf nvram input_leds e1000e snd_timer rfkill rng_core wmi snd mei_me evdev mei battery mac_hid led_class ac intel_pch_thermal rtc_cmos i2c_i801 pcc_cpufreq soundcore ip_tables x_tables ext4 crc32c_generic crc16 mbcache jbd2 fscrypto algif_skcipher af_alg dm_crypt dm_mod sd_mod crct10dif_pclmul crc32_pclmul
[ 158.591959] crc32c_intel ghash_clmulni_intel pcbc serio_raw ahci atkbd libahci libps2 xhci_pci libata aesni_intel aes_x86_64 crypto_simd cryptd glue_helper xhci_hcd scsi_mod i8042 serio hid_generic usbhid usbcore usb_common hid intel_agp i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm intel_gtt agpgart
[ 158.592043] CPU: 2 PID: 29 Comm: ksoftirqd/2 Tainted: G U 4.18.5 #1
[ 158.592047] Hardware name: LENOVO 20FN001CAU/20FN001CAU, BIOS R06ET59W (1.33 ) 02/27/2018
[ 158.592058] RIP: 0010:net_tx_action+0x1fe/0x260
[ 158.592060] Code: 8d bb 04 01 00 00 e8 f1 d5 15 00 e9 2a ff ff ff 5b 4c 89 e7 5d 41 5c 41 5d 41 5e e9 fc 5c 0c 00 0f 1f 44 00 00 e9 76 fe ff ff <0f> 0b e9 5f fe ff ff 65 8b 05 24 6d bf 44 89 c0 48 0f a3 05 2a 38
[ 158.592195] RSP: 0018:ffffb5d4c0d9be50 EFLAGS: 00010286
[ 158.592202] RAX: 00000000c0000000 RBX: ffff945bb4ae3800 RCX: 00000000000000a1
[ 158.592206] RDX: 0000000080000101 RSI: ffffffffbbc81896 RDI: ffffffffbbc898b5
[ 158.592211] RBP: 0000000000000002 R08: 000000694facc758 R09: 0000000000000100
[ 158.592215] R10: 0000000000000000 R11: ffff945bc1520a68 R12: ffff945bc1522f00
[ 158.592219] R13: ffff945bb4ae3900 R14: ffffffffbb4182a0 R15: ffffffffbaea1950
[ 158.592226] FS: 0000000000000000(0000) GS:ffff945bc1500000(0000) knlGS:0000000000000000
[ 158.592231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 158.592235] CR2: 00007ff03400dad8 CR3: 000000018de0a003 CR4: 00000000003606e0
[ 158.592241] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 158.592245] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 158.592248] Call Trace:
[ 158.592270] __do_softirq+0x10d/0x30d
[ 158.592287] ? sort_range+0x20/0x20
[ 158.592295] run_ksoftirqd+0x32/0x40
[ 158.592306] smpboot_thread_fn+0x198/0x230
[ 158.592319] kthread+0x112/0x130
[ 158.592330] ? kthread_flush_work_fn+0x10/0x10
[ 158.592342] ret_from_fork+0x35/0x40
[ 158.592353] ---[ end trace 88207aade9b579ae ]---
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Kernel Panic on high bandwidth transfer over wifi
2018-08-29 11:42 Kernel Panic on high bandwidth transfer over wifi Nathaniel Munk
2018-08-29 12:09 ` Willy Tarreau
@ 2018-08-29 15:29 ` Eric Dumazet
1 sibling, 0 replies; 4+ messages in thread
From: Eric Dumazet @ 2018-08-29 15:29 UTC (permalink / raw)
To: Nathaniel Munk, netdev@vger.kernel.org
On 08/29/2018 04:42 AM, Nathaniel Munk wrote:
> Hi all,
> I'm running Arch Linux on kernel 4.18.5 (same issue on both arch-provided kernel and mainline built-from-source). There is an issue whereby the kernel crashes when transferring at high bandwidths (approx 6mB/s) over a specific wifi connection. I can only reproduce the issue when using the Personal Hotspot on my iPhone 6S+, but can reproduce it very consistently on that connection.
>
> More often than not, any download reaching this speed will cause a panic, but if the download is immediately terminated at the first error the system can recover (and doing this I have obtained the attached logs). Unfortunately, I have not had access to a second machine to obtain the netconsole printout of the panic.
>
> As above, high-bandwidth transfers on other wifi networks do not cause the issue (nor on ethernet connections).
>
> As you can see from the attached log, the issue appears at tcp_recvmsg+0x579 and net_tx_action+0x1fe. At both these positions (net/ipv4/tcp.c:2000 and net/core/dev.c:4279 in mainline 4.18.5), a member of the skb struct is called.
>
> Thank you for your time (and I apologize if this is spurious or badly worded, this is my first bug report), and please don't hesitate to let me know if there's anything else I can do to help work this out.
>
> Regards,
> -------------------
> Nathaniel Munk
> nathaniel@munk.com.au
>
Unfortunately there is no attached log ;)
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2018-08-29 19:26 UTC | newest]
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2018-08-29 11:42 Kernel Panic on high bandwidth transfer over wifi Nathaniel Munk
2018-08-29 12:09 ` Willy Tarreau
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