WARNING in ieee80211_ibss_csa

WARNING in ieee80211_ibss_csa_beacon
Status: upstream: reported syz repro on 2020/11/22 05:50
Reported-by: syzbot+492b55475c5c790d1eed@syzkaller.appspotmail.com
First crash: 96d, last: 1d21h

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in ieee80211_ibss_csa_beacon	C	error		132	19h10m	141d	0/21	upstream: reported C repro on 2020/10/08 07:40
linux-4.14	WARNING in ieee80211_ibss_csa_beacon	C			1	4d22h	109d	0/1	upstream: reported C repro on 2020/11/08 18:28

Sample crash report:

IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
------------[ cut here ]------------
WARNING: CPU: 1 PID: 7 at net/mac80211/ibss.c:506 ieee80211_ibss_csa_beacon.cold+0x11/0x36 net/mac80211/ibss.c:506
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 7 Comm: kworker/u4:0 Not tainted 4.19.158-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy7 ieee80211_csa_finalize_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x61 kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:ieee80211_ibss_csa_beacon.cold+0x11/0x36 net/mac80211/ibss.c:506
Code: 9c 2c 95 f9 0f 0b 48 8d 85 c0 fd ff ff 48 89 85 e0 fc ff ff e9 f7 a2 ff ff e8 f3 32 aa f9 48 c7 c7 60 dc 66 89 e8 76 2c 95 f9 <0f> 0b 41 bd ea ff ff ff e9 66 b1 ff ff e8 d5 32 aa f9 48 c7 c7 60
RSP: 0018:ffff8880b5a57c70 EFLAGS: 00010286
RAX: 0000000000000024 RBX: ffff88809d116080 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814fdba1 RDI: ffffed1016b4af80
RBP: 0000000000000002 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 0000000000000000
R13: ffff88809d116b78 R14: ffff88809f2b9ae0 R15: ffff88809d1165b0
 ieee80211_set_after_csa_beacon net/mac80211/cfg.c:2934 [inline]
 __ieee80211_csa_finalize+0x6cc/0xde0 net/mac80211/cfg.c:2990
 ieee80211_csa_finalize net/mac80211/cfg.c:3013 [inline]
 ieee80211_csa_finalize_work+0x124/0x160 net/mac80211/cfg.c:3038
 process_one_work+0x864/0x1570 kernel/workqueue.c:2155
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (19):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	VM info	Title
ci2-linux-4-19	2020/11/22 05:49	linux-4.19.y	2c746135	0d27f508	.config	log	report	syz
ci2-linux-4-19	2021/02/24 13:03	linux-4.19.y	2d19be46	fcc6d71b	.config	log	report		info	WARNING in ieee80211_ibss_csa_beacon
ci2-linux-4-19	2021/02/19 17:17	linux-4.19.y	255b58a2	f689d40a	.config	log	report		info	WARNING in ieee80211_ibss_csa_beacon
ci2-linux-4-19	2021/02/17 20:23	linux-4.19.y	811218ec	14052202	.config	log	report		info	WARNING in ieee80211_ibss_csa_beacon
ci2-linux-4-19	2021/02/17 08:25	linux-4.19.y	811218ec	052f8d9f	.config	log	report		info	WARNING in ieee80211_ibss_csa_beacon
ci2-linux-4-19	2021/02/12 19:03	linux-4.19.y	811218ec	98682e5e	.config	log	report		info	WARNING in ieee80211_ibss_csa_beacon
ci2-linux-4-19	2021/02/10 21:38	linux-4.19.y	811218ec	a52ee10a	.config	log	report		info	WARNING in ieee80211_ibss_csa_beacon
ci2-linux-4-19	2021/01/13 11:28	linux-4.19.y	675cc038	a945f0a3	.config	log	report		info
ci2-linux-4-19	2021/01/09 22:19	linux-4.19.y	610bdbf6	2c1f2513	.config	log	report		info
ci2-linux-4-19	2021/01/06 18:44	linux-4.19.y	4143d798	fff20c29	.config	log	report		info
ci2-linux-4-19	2020/12/31 15:23	linux-4.19.y	3207316b	79264ae3	.config	log	report		info
ci2-linux-4-19	2020/12/31 00:34	linux-4.19.y	3207316b	ecb8c012	.config	log	report		info
ci2-linux-4-19	2020/12/28 02:45	linux-4.19.y	13d2ce42	2242f77f	.config	log	report		info
ci2-linux-4-19	2020/12/27 06:30	linux-4.19.y	13d2ce42	821e0b09	.config	log	report		info
ci2-linux-4-19	2020/12/26 09:45	linux-4.19.y	13d2ce42	821e0b09	.config	log	report		info
ci2-linux-4-19	2020/12/18 14:26	linux-4.19.y	13d2ce42	04201c06	.config	log	report		info
ci2-linux-4-19	2020/12/08 04:12	linux-4.19.y	daefdc9e	51a9082e	.config	log	report		info
ci2-linux-4-19	2020/12/01 13:00	linux-4.19.y	0c88e405	07bfe8a5	.config	log	report		info
ci2-linux-4-19	2020/11/24 05:20	linux-4.19.y	76bda503	1ab681a4	.config	log	report		info