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Subject: Warning in ieee80211_build_preq_ies
From:   James Prestwood <prestwoj@gmail.com>
To:     linux-wireless@vger.kernel.org
Date:   Thu, 15 Sep 2022 09:57:07 -0700
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Hi,

I noticed this warning on 5.16, recompiled to 5.19 and still saw it.
Its happening on a UML kernel running many tests if that makes a
difference. It will happen several times during a full test run, warn
many times >60, then stop for a bit and repeat.

[ 1413.940000] ------------[ cut here ]------------
[ 1413.940000] WARNING: CPU: 0 PID: 1706 at include/net/cfg80211.h:608
ieee80211_build_preq_ies+0x766/0x84d
[ 1413.940000] Modules linked in:
[ 1413.940000] CPU: 0 PID: 1706 Comm: kworker/u2:2 Tainted: G        W
5.19.0 #1
[ 1413.940000] Workqueue: rad2 ieee80211_scan_work
[ 1413.940000] Stack:
[ 1413.940000]  605d0943 60256c96 60035421 00000001
[ 1413.940000]  6052cddd 60450efa 65d61dd9 60454c00
[ 1413.940000]  00000000 00000000 00000009 6003e77d
[ 1413.940000] Call Trace:
[ 1413.940000]  [<60256c96>] ? dump_stack_print_info+0xe1/0xef
[ 1413.940000]  [<60035421>] ? um_set_signals+0x0/0x3c
[ 1413.940000]  [<60450efa>] ? _printk+0x0/0x9f
[ 1413.940000]  [<60454c00>] ? dump_stack_lvl+0x47/0x52
[ 1413.940000]  [<6003e77d>] ? __warn+0xf2/0x123
[ 1413.940000]  [<604501bb>] ? warn_slowpath_fmt+0xd6/0xe2
[ 1413.940000]  [<60066c8c>] ? __wake_up_common+0x9e/0x121
[ 1413.940000]  [<604500e5>] ? warn_slowpath_fmt+0x0/0xe2
[ 1413.940000]  [<603d3bc5>] ? ieee80211_ie_split_ric+0xe4/0xfe
[ 1413.940000]  [<60035421>] ? um_set_signals+0x0/0x3c
[ 1413.940000]  [<604341ac>] ? ieee80211_vif_type_p2p+0x0/0x26
[ 1413.940000]  [<6043aeb5>] ? ieee80211_build_preq_ies+0x766/0x84d
[ 1413.940000]  [<60035449>] ? um_set_signals+0x28/0x3c
[ 1413.940000]  [<602c6e4b>] ? skb_queue_tail+0x43/0x47
[ 1413.940000]  [<60429f6c>] ? skb_put_zero+0x2c/0x34
[ 1413.940000]  [<60429f40>] ? skb_put_zero+0x0/0x34
[ 1413.940000]  [<6043b095>] ? ieee80211_build_probe_req+0xf9/0x161
[ 1413.940000]  [<6040c2ed>] ?
ieee80211_scan_state_send_probe+0xaf/0x14c
[ 1413.940000]  [<60051181>] ? queue_delayed_work_on+0x67/0x72
[ 1413.940000]  [<6040d1b0>] ? ieee80211_scan_work+0x40b/0x503
[ 1413.940000]  [<600529de>] ? process_one_work+0x1b0/0x2b1
[ 1413.940000]  [<6004f829>] ? move_linked_works+0x0/0x57
[ 1413.940000]  [<60053086>] ? worker_thread+0x270/0x39b
[ 1413.940000]  [<6004f909>] ? set_pf_worker+0x0/0x5f
[ 1413.940000]  [<60057231>] ? arch_local_irq_save+0x0/0x26
[ 1413.940000]  [<60035449>] ? um_set_signals+0x28/0x3c
[ 1413.940000]  [<60052e16>] ? worker_thread+0x0/0x39b
[ 1413.940000]  [<600588ef>] ? kthread_exit+0x0/0x37
[ 1413.940000]  [<60052e16>] ? worker_thread+0x0/0x39b
[ 1413.940000]  [<60058a6d>] ? kthread+0x11f/0x124
[ 1413.940000]  [<60035377>] ? unblock_signals+0x36/0xe0
[ 1413.940000]  [<60021f95>] ? new_thread_handler+0x86/0xbb
[ 1413.940000] ---[ end trace 0000000000000000 ]---
[ 1414.230000] ------------[ cut here ]------------

Probably a separate issue, but I also noticed this print on 5.19:

[ 1054.390000] wlan107: authenticate with 02:00:00:00:f1:00
[ 1054.390000] wlan107: bad VHT capabilities, disabling VHT
[ 1054.390000] wlan107: Invalid HE elem, Disable HE
[ 1054.390000] wlan107: 80 MHz not supported, disabling VHT

I don't think its related since I don't see this on 5.16, but still see
the crash.

Thanks,
James