WARNING in ieee80211_ibss_csa_beacon

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 6b6446ef Linux 4.14.204
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11e21f32500000
kernel config: https://syzkaller.appspot.com/x/.config?x=3b2e3745f25cbc4e
dashboard link: https://syzkaller.appspot.com/bug?extid=80e54ae109d8e7c3d947
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11d1456c500000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17320184500000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+80e54a...@syzkaller.appspotmail.com

wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50
wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50
IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready
------------[ cut here ]------------
WARNING: CPU: 0 PID: 715 at net/mac80211/ibss.c:506 ieee80211_ibss_csa_beacon+0x523/0x670 net/mac80211/ibss.c:506
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 715 Comm: kworker/u4:3 Not tainted 4.14.204-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: phy3 ieee80211_csa_finalize_work
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x283 lib/dump_stack.c:58
panic+0x1f9/0x42d kernel/panic.c:183
__warn.cold+0x20/0x4b kernel/panic.c:547
report_bug+0x208/0x249 lib/bug.c:186
fixup_bug arch/x86/kernel/traps.c:177 [inline]
fixup_bug arch/x86/kernel/traps.c:172 [inline]
do_error_trap+0x195/0x2d0 arch/x86/kernel/traps.c:295
invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:ieee80211_ibss_csa_beacon+0x523/0x670 net/mac80211/ibss.c:506
RSP: 0018:ffff8880b4097ca0 EFLAGS: 00010297
RAX: ffff8880b4044440 RBX: ffff888094155b40 RCX: 1ffff110168089b1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880b4044cc4
RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888094156630 R14: ffff888094bb9160 R15: ffff888094156068
ieee80211_set_after_csa_beacon net/mac80211/cfg.c:2909 [inline]
__ieee80211_csa_finalize+0x677/0xca0 net/mac80211/cfg.c:2965
ieee80211_csa_finalize net/mac80211/cfg.c:2988 [inline]
ieee80211_csa_finalize_work+0x105/0x130 net/mac80211/cfg.c:3013
process_one_work+0x793/0x14a0 kernel/workqueue.c:2116
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404
Kernel Offset: disabled
Rebooting in 86400 seconds..


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