WARNING in restore_regulatory_settings (2)

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 424a46ea058e Linux 4.14.288
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=12689d1a080000
kernel config: https://syzkaller.appspot.com/x/.config?x=73682fefcf4b3022
dashboard link: https://syzkaller.appspot.com/bug?extid=c37d3b0f22a3ffc61093
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1422a23a080000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=127ef7a2080000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+c37d3b...@syzkaller.appspotmail.com

Unexpected user alpha2: ��
------------[ cut here ]------------
WARNING: CPU: 0 PID: 3625 at net/wireless/reg.c:414 is_user_regdom_saved net/wireless/reg.c:414 [inline]
WARNING: CPU: 0 PID: 3625 at net/wireless/reg.c:414 restore_alpha2 net/wireless/reg.c:2569 [inline]
WARNING: CPU: 0 PID: 3625 at net/wireless/reg.c:414 restore_regulatory_settings.cold+0x18/0x46 net/wireless/reg.c:2661
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 3625 Comm: kworker/0:2 Not tainted 4.14.288-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Workqueue: events_power_efficient crda_timeout_work
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
panic+0x1f9/0x42d kernel/panic.c:183
__warn.cold+0x20/0x44 kernel/panic.c:547
report_bug+0x208/0x250 lib/bug.c:183
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:is_user_regdom_saved net/wireless/reg.c:414 [inline]
RIP: 0010:restore_alpha2 net/wireless/reg.c:2569 [inline]
RIP: 0010:restore_regulatory_settings.cold+0x18/0x46 net/wireless/reg.c:2661
RSP: 0018:ffff8880a8fafca0 EFLAGS: 00010282
RAX: 000000000000001a RBX: 00000000000000bf RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff878bc880 RDI: ffffed10151f5f8a
RBP: 0000000000000001 R08: 000000000000001a R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 00000000000000c7
R13: 00000000000000bf R14: ffff8880ba433b80 R15: ffff8880ba438800
crda_timeout_work+0x2a/0x50 net/wireless/reg.c:541
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
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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