Greetings all, Apologies if any of this is wrong, this is my first attempt to report a bug in the linux kernel =)
I got here by running the get_maintainer script on the iwlwifi directory of a
linux kernel checkout.
I am running debian stock kernel 4.8.15, and using the built in iwlwifi
driver
$⮀ uname -a
Linux powerhouse 4.8.0-2-amd64 #1 SMP Debian 4.8.15-2 (2017-01-04) x86_64
GNU/Linux
$⮀ dpkg -l | grep iwlwifi
ii firmware-iwlwifi 20160110-1~bpo8+1 all
Binary firmware for Intel Wireless cards
I am on a slightly older firmware and kernel due to the currently-outstanding
bug:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=849330
This is the newest combination of kernel/firmware I've been able to make work.
Here is the lspci -v output for my wifi:
03:00.0 Network controller: Intel Corporation Wireless 8260 (rev 3a)
Subsystem: Intel Corporation Wireless 8260
Flags: bus master, fast devsel, latency 0, IRQ 136
Memory at df200000 (64-bit, non-prefetchable) [size=8K]
Capabilities: <access denied>
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
Recently, while testing a 2nd panda wifi card (trying to make a hotspot and use
the iwl card as a gateway device), I got a kernel panic. Here is the relevant
excerpt from kern.log:
Sep 3 11:37:49 powerhouse kernel: [21394.510512] ------------[ cut here
]------------
Sep 3 11:37:49 powerhouse kernel: [21394.510514] kernel BUG at
/build/linux-zDY19G/linux-4.8.15/kernel/module.c:890!
Sep 3 11:37:49 powerhouse kernel: [21394.510515] invalid opcode: 0000 [#1] SMP
Sep 3 11:37:49 powerhouse kernel: [21394.510516] Modules linked in: iwlmvm
iwlwifi ipt_REJECT nf_reject_ipv4 xt_tcpudp nf_nat_h323 nf_conntrack_h323
nf_nat_pptp nf_nat_proto_gre nf_conntrack_pptp nf_conntrack_proto_gre
nf_nat_tftp nf_conntrack_tftp nf_nat_sip nf_conntrack_sip nf_nat_irc
nf_conntrack_irc nf_nat_ftp nf_conntrack_ftp hid_generic rt2800usb rt2x00usb
rt2800lib rt2x00lib crc_ccitt ipt_MASQUERADE nf_nat_masquerade_ipv4
nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo iptable_nat
nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype xt_conntrack nf_nat
nf_conntrack br_netfilter bridge stp overlay iptable_filter appletalk ax25 ipx
p8023 p8022 psnap llc bnep snd_hda_codec_hdmi arc4 binfmt_misc nls_ascii
nls_cp437 vfat fat mac80211 snd_hda_codec_realtek intel_rapl
x86_pkg_temp_thermal mxm_wmi intel_powerclamp coretemp snd_hda_codec_generic
kvm_intel kvm efi_pstore irqbypass snd_hda_intel intel_cstate snd_hda_codec
uvcvideo videobuf2_vmalloc rtsx_pci_ms videobuf2_memops snd_hda_core
videobuf2_v4l2 iTCO_wdt videobuf2_core snd_hwdep intel_uncore videodev joydev
btusb intel_rapl_perf evdev media btrtl cfg80211 serio_raw pcspkr efivars
memstick iTCO_vendor_support snd_pcm snd_timer mei_me hci_uart snd mei
soundcore btbcm btqca btintel bluetooth rfkill wmi video intel_lpss_acpi
intel_lpss shpchp battery acpi_pad ac tpm_tis button tpm_tis_core tpm
nvidia_drm(POE) drm_kms_helper drm nvidia_modeset(POE) nvidia(POE) parport_pc
ppdev lp parport efivarfs ip_tables x_tables autofs4 ext4 crc16 jbd2
crc32c_generic fscrypto ecb mbcache algif_skcipher af_alg dm_crypt dm_mod
hid_logitech_hidpp hid_logitech_dj usbhid rtsx_pci_sdmmc mmc_core
crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel aesni_intel ahci
libahci aes_x86_64 lrw gf128mul glue_helper xhci_pci ablk_helper cryptd libata
xhci_hcd psmouse usbcore nvme scsi_mod i2c_i801 nvme_core i2c_smbus rtsx_pci
r8169 mii mfd_core usb_common thermal i2c_hid hid fjes [last unloaded: iwlwifi]
Sep 3 11:37:49 powerhouse kernel: [21394.510561] CPU: 4 PID: 8122 Comm: rmmod
Tainted: P R OE 4.8.0-2-amd64 #1 Debian 4.8.15-2
Sep 3 11:37:49 powerhouse kernel: [21394.510562] Hardware name: System76, Inc.
Oryx Pro/Oryx Pro, BIOS 1.05.09RSA1 11/16/2015
Sep 3 11:37:49 powerhouse kernel: [21394.510563] task: ffff8dec4a3e0000
task.stack: ffff8decf4cd4000
Sep 3 11:37:49 powerhouse kernel: [21394.510564] RIP:
0010:[<ffffffffbccf98b9>] [<ffffffffbccf98b9>] SyS_delete_module+0x259/0x260
Sep 3 11:37:49 powerhouse kernel: [21394.510568] RSP: 0018:ffff8decf4cd7ef0
EFLAGS: 00010297
Sep 3 11:37:49 powerhouse kernel: [21394.510569] RAX: 00000000ffffffff RBX:
ffffffffc1aa71c0 RCX: 0000000000000005
Sep 3 11:37:49 powerhouse kernel: [21394.510570] RDX: ffffffffc1aa74a0 RSI:
ffffffffc1aa74c8 RDI: ffffffffc1aa71d8
Sep 3 11:37:49 powerhouse kernel: [21394.510571] RBP: 000055fb472021f0 R08:
0000000000000000 R09: 000000000000006d
Sep 3 11:37:49 powerhouse kernel: [21394.510572] R10: 000055fb472011c0 R11:
8080808080808080 R12: 0000000000000a00
Sep 3 11:37:49 powerhouse kernel: [21394.510572] R13: 0000000000000a00 R14:
00007fff6cd8d4f8 R15: 0000000000000000
Sep 3 11:37:49 powerhouse kernel: [21394.510573] FS: 00007f498ef22700(0000)
GS:ffff8ded76500000(0000) knlGS:0000000000000000
Sep 3 11:37:49 powerhouse kernel: [21394.510574] CS: 0010 DS: 0000 ES: 0000
CR0: 0000000080050033
Sep 3 11:37:49 powerhouse kernel: [21394.510575] CR2: 00007f498eacf801 CR3:
0000000fa99d0000 CR4: 00000000003406e0
Sep 3 11:37:49 powerhouse kernel: [21394.510576] DR0: 0000000000000000 DR1:
0000000000000000 DR2: 0000000000000000
Sep 3 11:37:49 powerhouse kernel: [21394.510576] DR3: 0000000000000000 DR6:
00000000fffe0ff0 DR7: 0000000000000400
Sep 3 11:37:49 powerhouse kernel: [21394.510577] Stack:
Sep 3 11:37:49 powerhouse kernel: [21394.510578] 00006d766d6c7769
0000000000000002 ffff8decf4cd4000 ffffffffbcc03290
Sep 3 11:37:49 powerhouse kernel: [21394.510579] ffff8decf4cd7f58
ffff8decf4cd4000 0000000000000050 00000000520cd409
Sep 3 11:37:49 powerhouse kernel: [21394.510581] 00007fff6cd8d338
000055fb472021f0 00007fff6cd8d508 00007fff6cd8ebbb
Sep 3 11:37:49 powerhouse kernel: [21394.510582] Call Trace:
Sep 3 11:37:49 powerhouse kernel: [21394.510586] [<ffffffffbcc03290>] ?
exit_to_usermode_loop+0xa0/0xc0
Sep 3 11:37:49 powerhouse kernel: [21394.510588] [<ffffffffbd1e8cb6>] ?
system_call_fast_compare_end+0xc/0x96
Sep 3 11:37:49 powerhouse kernel: [21394.510588] Code: fe ff ff 41 f7 c4 00 02
00 00 48 c7 c5 f0 ff ff ff 0f 84 5c fe ff ff be 01 00 00 00 bf 03 00 00 00 e8
0c b3 f7 ff e9 b7 fe ff ff <0f> 0b e8 90 b4 f7 ff 0f 1f 44 00 00 31 c0 c3 0f 1f
84 00 00 00
Sep 3 11:37:49 powerhouse kernel: [21394.510605] RIP [<ffffffffbccf98b9>]
SyS_delete_module+0x259/0x260
Sep 3 11:37:49 powerhouse kernel: [21394.510607] RSP <ffff8decf4cd7ef0>
Sep 3 11:37:49 powerhouse kernel: [21394.510608] ---[ end trace
5b24b93b49e857eb ]---
Sep 3 11:37:49 powerhouse kernel: [21409.372738] ieee80211 phy3:
rt2x00usb_vendor_request: Error - Vendor Request 0x07 failed for offset 0x0438
with error -110
Sep 3 11:38:05 powerhouse kernel: [21425.406196] INFO: rcu_sched detected
stalls on CPUs/tasks:
Sep 3 11:38:20 powerhouse kernel: [21425.406201] 4-...: (0 ticks this
GP) idle=02d/140000000000000/0 softirq=277173/277173 fqs=8
Sep 3 11:38:20 powerhouse kernel: [21425.406202] (detected by 7, t=7721
jiffies, g=246559, c=246558, q=936)
Sep 3 11:38:20 powerhouse kernel: [21425.406204] Task dump for CPU 4:
Sep 3 11:38:20 powerhouse kernel: [21425.406206] rmmod R running
task 0 8122 8121 0x00000008
Sep 3 11:38:20 powerhouse kernel: [21425.406209] 0000000000000002
ffff8decf4cd7e48 ffffffffbd3df853 0000000000000000
Sep 3 11:38:20 powerhouse kernel: [21425.406211] 0000000000000000
ffffffffbcccc3d3 0000000000000246 000000000000000b
Sep 3 11:38:20 powerhouse kernel: [21425.406214] ffffffffbcc289f8
0000000000000006 ffff8decf4cd7e48 0000000000000004
Sep 3 11:38:20 powerhouse kernel: [21425.406216] Call Trace:
Sep 3 11:38:20 powerhouse kernel: [21425.406222] [<ffffffffbcccc3d3>] ?
kmsg_dump+0x93/0xb0
Sep 3 11:38:20 powerhouse kernel: [21425.406225] [<ffffffffbcc289f8>] ?
oops_end+0x78/0xd0
Sep 3 11:38:20 powerhouse kernel: [21425.406228] [<ffffffffbcc26446>] ?
do_error_trap+0x86/0x100
Sep 3 11:38:20 powerhouse kernel: [21425.406976] [<ffffffffbccf98b9>] ?
SyS_delete_module+0x259/0x260
Sep 3 11:38:20 powerhouse kernel: [21425.406979] [<ffffffffbcdda242>] ?
kmem_cache_alloc+0x122/0x530
Sep 3 11:38:20 powerhouse kernel: [21425.406982] [<ffffffffbd1e9a2e>] ?
invalid_op+0x1e/0x30
Sep 3 11:38:20 powerhouse kernel: [21425.407276] [<ffffffffbccf98b9>] ?
SyS_delete_module+0x259/0x260
Sep 3 11:38:20 powerhouse kernel: [21425.407277] perf: interrupt took too long
(8612 > 2500), lowering kernel.perf_event_max_sample_rate to 23000
Sep 3 11:3Sep 3 11:39:51 powerhouse kernel: [ 0.000000] Linux version
4.8.0-2-amd64 (debian-ker...@lists.debian.org) (gcc version 5.4.1 20161202
(Debian 5.4.1-4) ) #1 SMP Debian 4.8.15-2 (2017-01-04)
Sep 3 11:39:51 powerhouse kernel: [ 0.000000] Command line:
BOOT_IMAGE=/vmlinuz-4.8.0-2-amd64 root=/dev/mapper/powerhouse--vg-root ro quiet
Obviously, I'm not certain the bug is in this kernel module or even has
anything to do with it, but I thought this was a good place to start. Advice
welcome, happy to help however I can, I am a software engineer but not very
experienced at kernel hacking.
Many thanks!
-Carl
--
Carl Myers
PGP Key ID 3537595B
PGP Key fingerprint 9365 0FAF 721B 992A 0A20 1E0D C795 2955 3537 595B
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