Hi All,
We've had a user report the backtrace below when loading batman-adv on his machine. It looks like the cfg80211 layer is complaining about a null bss returned, but I cannot tell if the rtlwifi driver or batman-adv is in error here.
Thoughts?
josh
Jan 28 22:29:21 melissa.gathman.org kernel: batman_adv: B.A.T.M.A.N. advanced 2015.2 (compatibility version 15) loaded Jan 28 22:29:21 melissa.gathman.org kernel: wlp0s26u1u4: Selected IBSS BSSID 02:1a:a0:3a:a6:ff based on configured SSID Jan 28 22:29:21 melissa.gathman.org kernel: ------------[ cut here ]------------ Jan 28 22:29:21 melissa.gathman.org kernel: WARNING: CPU: 1 PID: 111 at net/wireless/ibss.c:35 __cfg80211_ibss_joined+0x166/0x190 [cfg80211]() Jan 28 22:29:21 melissa.gathman.org kernel: Modules linked in: batman_adv libcrc32c xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack tun ebtable_filter ebtable_nat ebtable_broute bridge stp llc ebtables ip6table_mangle ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_raw ip6table_security ip6table_filter ip6_tables iptable_mangle iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_raw iptable_security arc4 rtl8192cu rtl_usb rtl8192c_common rtlwifi mac80211 cfg80211 rfkill uvcvideo videobuf2_vmalloc videobuf2_core videobuf2_memops v4l2_common intel_rapl snd_hda_codec_hdmi snd_usb_audio joydev snd_usbmidi_lib snd_hda_codec_realtek iosf_mbi x86_pkg_temp_thermal videodev coretemp kvm_intel Jan 28 22:29:21 melissa.gathman.org kernel: media snd_rawmidi cm109 snd_hda_codec_generic kvm snd_hda_intel iTCO_wdt snd_hda_codec iTCO_vendor_support crct10dif_pclmul snd_hda_core ppdev snd_hwdep snd_seq snd_seq_device snd_pcm crc32_pclmul crc32c_intel snd_timer snd dcdbas lpc_ich mei_me parport_pc parport shpchp i2c_i801 mei tpm_tis tpm soundcore nfsd auth_rpcgss nfs_acl lockd grace sunrpc hid_microsoft i915 i2c_algo_bit drm_kms_helper drm e1000e serio_raw ptp pps_core fjes video Jan 28 22:29:21 melissa.gathman.org kernel: CPU: 1 PID: 111 Comm: kworker/u32:5 Not tainted 4.3.3-301.fc23.x86_64 #1 Jan 28 22:29:21 melissa.gathman.org kernel: Hardware name: Dell Inc. OptiPlex 790/0HY9JP, BIOS A06 07/25/2011 Jan 28 22:29:21 melissa.gathman.org kernel: Workqueue: cfg80211 cfg80211_event_work [cfg80211] Jan 28 22:29:21 melissa.gathman.org kernel: 0000000000000000 000000008beeeb5f ffff8800368bfce0 ffffffff813a626f Jan 28 22:29:21 melissa.gathman.org kernel: 0000000000000000 ffff8800368bfd18 ffffffff810a07c2 ffff8800c2bc8850 Jan 28 22:29:21 melissa.gathman.org kernel: ffff8800c2bc8000 ffff8801275bd558 0000000000000000 0000000000000286 Jan 28 22:29:21 melissa.gathman.org kernel: Call Trace: Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff813a626f>] dump_stack+0x44/0x55 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810a07c2>] warn_slowpath_common+0x82/0xc0 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810a090a>] warn_slowpath_null+0x1a/0x20 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffffa05dfcd6>] __cfg80211_ibss_joined+0x166/0x190 [cfg80211] Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffffa05bb02c>] cfg80211_process_wdev_events+0x8c/0x190 [cfg80211] Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffffa05bb162>] cfg80211_process_rdev_events+0x32/0x70 [cfg80211] Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffffa05b601e>] cfg80211_event_work+0x1e/0x30 [cfg80211] Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810b8cde>] process_one_work+0x19e/0x3f0 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810b8f7e>] worker_thread+0x4e/0x450 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810b8f30>] ? process_one_work+0x3f0/0x3f0 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810bede8>] kthread+0xd8/0xf0 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810bed10>] ? kthread_worker_fn+0x160/0x160 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff8178195f>] ret_from_fork+0x3f/0x70 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810bed10>] ? kthread_worker_fn+0x160/0x160 Jan 28 22:29:21 melissa.gathman.org kernel: ---[ end trace 04ee7067960ce525 ]--- Jan 28 22:29:21 melissa.gathman.org kernel: batman_adv: bat0: Adding interface: wlp0s26u1u4
On Wed, Feb 3, 2016 at 10:24 AM, Josh Boyer jwboyer@fedoraproject.org wrote:
Hi All,
We've had a user report the backtrace below when loading batman-adv on his machine. It looks like the cfg80211 layer is complaining about a null bss returned, but I cannot tell if the rtlwifi driver or batman-adv is in error here.
Thoughts?
Sorry, forgot to include the link to the actual bug report:
https://bugzilla.redhat.com/show_bug.cgi?id=1304428
Reporter says this is new with 4.3.y and did not happen on e.g. 4.2.8.
josh
Jan 28 22:29:21 melissa.gathman.org kernel: batman_adv: B.A.T.M.A.N. advanced 2015.2 (compatibility version 15) loaded Jan 28 22:29:21 melissa.gathman.org kernel: wlp0s26u1u4: Selected IBSS BSSID 02:1a:a0:3a:a6:ff based on configured SSID Jan 28 22:29:21 melissa.gathman.org kernel: ------------[ cut here ]------------ Jan 28 22:29:21 melissa.gathman.org kernel: WARNING: CPU: 1 PID: 111 at net/wireless/ibss.c:35 __cfg80211_ibss_joined+0x166/0x190 [cfg80211]() Jan 28 22:29:21 melissa.gathman.org kernel: Modules linked in: batman_adv libcrc32c xt_CHECKSUM ipt_MASQUERADE nf_nat_masquerade_ipv4 nf_conntrack_netbios_ns nf_conntrack_broadcast ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack tun ebtable_filter ebtable_nat ebtable_broute bridge stp llc ebtables ip6table_mangle ip6table_nat nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ipv6 ip6table_raw ip6table_security ip6table_filter ip6_tables iptable_mangle iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 nf_nat nf_conntrack iptable_raw iptable_security arc4 rtl8192cu rtl_usb rtl8192c_common rtlwifi mac80211 cfg80211 rfkill uvcvideo videobuf2_vmalloc videobuf2_core videobuf2_memops v4l2_common intel_rapl snd_hda_codec_hdmi snd_usb_audio joydev snd_usbmidi_lib snd_hda_codec_realtek iosf_mbi x86_pkg_temp_thermal videodev coretemp kvm_intel Jan 28 22:29:21 melissa.gathman.org kernel: media snd_rawmidi cm109 snd_hda_codec_generic kvm snd_hda_intel iTCO_wdt snd_hda_codec iTCO_vendor_support crct10dif_pclmul snd_hda_core ppdev snd_hwdep snd_seq snd_seq_device snd_pcm crc32_pclmul crc32c_intel snd_timer snd dcdbas lpc_ich mei_me parport_pc parport shpchp i2c_i801 mei tpm_tis tpm soundcore nfsd auth_rpcgss nfs_acl lockd grace sunrpc hid_microsoft i915 i2c_algo_bit drm_kms_helper drm e1000e serio_raw ptp pps_core fjes video Jan 28 22:29:21 melissa.gathman.org kernel: CPU: 1 PID: 111 Comm: kworker/u32:5 Not tainted 4.3.3-301.fc23.x86_64 #1 Jan 28 22:29:21 melissa.gathman.org kernel: Hardware name: Dell Inc. OptiPlex 790/0HY9JP, BIOS A06 07/25/2011 Jan 28 22:29:21 melissa.gathman.org kernel: Workqueue: cfg80211 cfg80211_event_work [cfg80211] Jan 28 22:29:21 melissa.gathman.org kernel: 0000000000000000 000000008beeeb5f ffff8800368bfce0 ffffffff813a626f Jan 28 22:29:21 melissa.gathman.org kernel: 0000000000000000 ffff8800368bfd18 ffffffff810a07c2 ffff8800c2bc8850 Jan 28 22:29:21 melissa.gathman.org kernel: ffff8800c2bc8000 ffff8801275bd558 0000000000000000 0000000000000286 Jan 28 22:29:21 melissa.gathman.org kernel: Call Trace: Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff813a626f>] dump_stack+0x44/0x55 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810a07c2>] warn_slowpath_common+0x82/0xc0 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810a090a>] warn_slowpath_null+0x1a/0x20 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffffa05dfcd6>] __cfg80211_ibss_joined+0x166/0x190 [cfg80211] Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffffa05bb02c>] cfg80211_process_wdev_events+0x8c/0x190 [cfg80211] Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffffa05bb162>] cfg80211_process_rdev_events+0x32/0x70 [cfg80211] Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffffa05b601e>] cfg80211_event_work+0x1e/0x30 [cfg80211] Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810b8cde>] process_one_work+0x19e/0x3f0 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810b8f7e>] worker_thread+0x4e/0x450 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810b8f30>] ? process_one_work+0x3f0/0x3f0 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810bede8>] kthread+0xd8/0xf0 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810bed10>] ? kthread_worker_fn+0x160/0x160 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff8178195f>] ret_from_fork+0x3f/0x70 Jan 28 22:29:21 melissa.gathman.org kernel: [<ffffffff810bed10>] ? kthread_worker_fn+0x160/0x160 Jan 28 22:29:21 melissa.gathman.org kernel: ---[ end trace 04ee7067960ce525 ]--- Jan 28 22:29:21 melissa.gathman.org kernel: batman_adv: bat0: Adding interface: wlp0s26u1u4
On Wed, 2016-02-03 at 10:26 -0500, Josh Boyer wrote:
On Wed, Feb 3, 2016 at 10:24 AM, Josh Boyer <jwboyer@fedoraproject.or g> wrote:
Hi All,
We've had a user report the backtrace below when loading batman-adv on his machine. It looks like the cfg80211 layer is complaining about a null bss returned, but I cannot tell if the rtlwifi driver or batman-adv is in error here.
Thoughts?
Sorry, forgot to include the link to the actual bug report:
https://bugzilla.redhat.com/show_bug.cgi?id=1304428
Reporter says this is new with 4.3.y and did not happen on e.g. 4.2.8.
AFAICT this should be a driver (or perhaps mac80211) issue, but I don't see any information about the driver used.
johannes
On Wed, Feb 3, 2016 at 10:41 AM, Johannes Berg johannes@sipsolutions.net wrote:
On Wed, 2016-02-03 at 10:26 -0500, Josh Boyer wrote:
On Wed, Feb 3, 2016 at 10:24 AM, Josh Boyer <jwboyer@fedoraproject.or g> wrote:
Hi All,
We've had a user report the backtrace below when loading batman-adv on his machine. It looks like the cfg80211 layer is complaining about a null bss returned, but I cannot tell if the rtlwifi driver or batman-adv is in error here.
Thoughts?
Sorry, forgot to include the link to the actual bug report:
https://bugzilla.redhat.com/show_bug.cgi?id=1304428
Reporter says this is new with 4.3.y and did not happen on e.g. 4.2.8.
AFAICT this should be a driver (or perhaps mac80211) issue, but I don't see any information about the driver used.
The backtrace has all the modules loaded included in it. rtlwifi is listed there and it's the only wireless driver in use (rtl8192cu specifically via USB).
josh
On Wednesday 03 February 2016 16:41:30 Johannes Berg wrote:
On Wed, 2016-02-03 at 10:26 -0500, Josh Boyer wrote:
On Wed, Feb 3, 2016 at 10:24 AM, Josh Boyer <jwboyer@fedoraproject.or g> wrote:
Hi All,
We've had a user report the backtrace below when loading batman-adv on his machine. It looks like the cfg80211 layer is complaining about a null bss returned, but I cannot tell if the rtlwifi driver or batman-adv is in error here.
Thoughts?
Sorry, forgot to include the link to the actual bug report:
https://bugzilla.redhat.com/show_bug.cgi?id=1304428
Reporter says this is new with 4.3.y and did not happen on e.g. 4.2.8.
AFAICT this should be a driver (or perhaps mac80211) issue, but I don't see any information about the driver used.
It doesn't really look like it is batman-adv specific. batman-adv also doesn't be active because the message "batman_adv: bat0: Adding interface: " is missing.
batman-adv is also not responsible for the underlying device. So it will not join IBSS and thus should not trigger the "wlp0s26u1u4: Selected IBSS BSSID" seen in the log.
But that said, I already saw weirder things happen because of memory corruptions. So I will not say that batman-adv cannot be the culprit but right now I don't see how.
The user can also try (when he thinks that batman-adv is to blame) to bisect the batman-adv versions via the git of the out-of-tree module [1]. The version [2] from 4.1 should be roughly v2015.0 (b6ff92aa334083dee8a1f5f0c5aa0f7c4c2584cf), v4.2 should be v2015.1 (95b64b1cef38340f48f4eba99689e0fb1feddcd0) and v4.3 should not be newer than v2015.2 (e25bd38b0f8b4aeca85ef24884fa5eadd6270709). So bisecting between b6ff92aa334083dee8a1f5f0c5aa0f7c4c2584cf and e25bd38b0f8b4aeca85ef24884fa5eadd6270709 (~6 steps) should cover it. I personally would recommend to start on 4.2.8 with v2015.2 (e25bd38b0f8b4aeca85ef24884fa5eadd6270709)
Kind regards, Sven
[1] https://git.open-mesh.org/batman-adv.git [2] https://www.open-mesh.org/projects/open-mesh/wiki/Download#batman-adv-in-the...
On Wednesday 03 February 2016 18:09:40 Sven Eckelmann wrote:
AFAICT this should be a driver (or perhaps mac80211) issue, but I don't see any information about the driver used.
It doesn't really look like it is batman-adv specific. batman-adv also doesn't be active because the message "batman_adv: bat0: Adding interface: " is missing.
Maybe I should clarify a little bit. I meant that that message is missing before the problem happens. The interface message appears after the problem was detected.
And maybe I should also inform you that many batman-adv refcounting patches [1] for some long standing problems are getting queued up by the brave linux-stable people. But there are also two patches [2,3] which Antonio hasn't submitted yet.
Kind regards, Sven
[1] https://kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.3.5-rc1.gz [2] https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-January/014304.html [3] https://lists.open-mesh.org/pipermail/b.a.t.m.a.n/2016-January/014305.html
On Wednesday 03 February 2016 10:24:43 Josh Boyer wrote:
Hi All,
We've had a user report the backtrace below when loading batman-adv on his machine. It looks like the cfg80211 layer is complaining about a null bss returned, but I cannot tell if the rtlwifi driver or batman-adv is in error here.
Thoughts?
About the attachment "batman-adv oopses with kernel-4.3.4-300+debug". Sorry, this was my fault and caused by an copy+paster error while adding some lockdep_asserts. This caused too many lockdep reports. It was fixed a while ago upstream in 008a37448707 ("batman-adv: Fix lockdep annotation of batadv_tlv_container_remove").
Kind regards, Sven
b.a.t.m.a.n@lists.open-mesh.org
-
Johannes Berg -
Josh Boyer -
Sven Eckelmann