WARNING in restore_regulatory

WARNING in restore_regulatory_settings
Status: fixed on 2020/09/25 01:17
Reported-by: syzbot+d451401ffd00a60677ee@syzkaller.appspotmail.com
Fix commit: 47caf685a685 cfg80211: regulatory: reject invalid hints
First crash: 864d, last: 619d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in restore_regulatory_settings (log)
Repro: C syz .config

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	WARNING in restore_regulatory_settings	C		error	1612	617d	864d	0/1	upstream: reported C repro on 2020/01/06 09:29
linux-4.14	WARNING in restore_regulatory_settings	C		done	2264	617d	863d	1/1	fixed on 2020/10/09 20:44

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2020/08/03 22:08	18m	rkovhaev@gmail.com	patch	upstream	OK

Sample crash report:

------------[ cut here ]------------
Unexpected user alpha2: A�
WARNING: CPU: 1 PID: 3290 at net/wireless/reg.c:418 is_user_regdom_saved net/wireless/reg.c:418 [inline]
WARNING: CPU: 1 PID: 3290 at net/wireless/reg.c:418 restore_alpha2 net/wireless/reg.c:3102 [inline]
WARNING: CPU: 1 PID: 3290 at net/wireless/reg.c:418 restore_regulatory_settings+0x212/0x1550 net/wireless/reg.c:3194
Kernel panic - not syncing: panic_on_warn set ...
CPU: 1 PID: 3290 Comm: kworker/1:9 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_power_efficient crda_timeout_work
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 panic+0x2e3/0x75c kernel/panic.c:231
 __warn.cold+0x20/0x45 kernel/panic.c:600
 report_bug+0x1bd/0x210 lib/bug.c:198
 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:235
 exc_invalid_op+0x13/0x40 arch/x86/kernel/traps.c:255
 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:542
RIP: 0010:is_user_regdom_saved net/wireless/reg.c:418 [inline]
RIP: 0010:restore_alpha2 net/wireless/reg.c:3102 [inline]
RIP: 0010:restore_regulatory_settings+0x212/0x1550 net/wireless/reg.c:3194
Code: 44 89 ee e8 10 b6 09 fa 45 84 ed 0f 85 58 07 00 00 e8 c2 b9 09 fa 41 0f be d4 40 0f be f5 48 c7 c7 a0 2f 16 89 e8 10 fa da f9 <0f> 0b e8 a7 b9 09 fa 48 8b 1d 20 fa 2e 03 48 b8 00 00 00 00 00 fc
RSP: 0018:ffffc9000b8efc20 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: ffff88809b5b20c0 RSI: ffffffff815d4f87 RDI: fffff5200171df76
RBP: 0000000000000041 R08: 0000000000000001 R09: ffff8880ae7318e7
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88809b4cd800 R15: ffff8880ae735600
 crda_timeout_work+0x1d/0x30 net/wireless/reg.c:520
 process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (10414):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro
ci-upstream-kasan-gce-selinux-root	2020/07/17 10:28	upstream	f8456690ba8e	54b3c45e	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/07/17 10:04	upstream	f8456690ba8e	54b3c45e	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/07/17 04:37	upstream	f8456690ba8e	54b3c45e	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/06/10 22:38	upstream	7ae77150d94d	a6f7998d	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/06/10 22:32	upstream	7ae77150d94d	a6f7998d	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/06/10 22:25	upstream	7ae77150d94d	a6f7998d	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/06/05 16:39	upstream	435faf5c218a	2420d1bc	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/06/04 02:29	upstream	d6f9469a03d8	a5ce5de0	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/06/02 21:11	upstream	f359287765c0	52fd7b7d	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/05/20 03:21	upstream	3c9e66568ad4	67fa1f59	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/05/19 18:46	upstream	642b151f45dd	6d882fd2	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/05/19 16:57	upstream	642b151f45dd	6d882fd2	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/05/19 05:17	upstream	45088963ca9c	684d3606	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/05/07 06:40	upstream	3c40cdb0e93e	4618eb2d	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/05/05 16:51	upstream	47cf1b422e60	4b76dd25	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/04/23 16:28	upstream	c578ddb39e56	2e44d63e	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/04/22 05:14	upstream	189522da8b3a	2e44d63e	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/01/17 01:14	upstream	f5ae2ea6347a	3de7aabb	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/01/17 00:43	upstream	f5ae2ea6347a	3de7aabb	.config	log	report	syz	C
ci-upstream-kasan-gce-smack-root	2020/01/17 00:31	upstream	f5ae2ea6347a	3de7aabb	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/01/07 01:48	upstream	c79f46a28239	53430d97	.config	log	report	syz	C
ci-upstream-kasan-gce-root	2020/01/06 10:48	upstream	c79f46a28239	438e1227	.config	log	report	syz	C
ci-upstream-net-this-kasan-gce	2020/06/10 22:31	net	4d3da2d8d91f	a6f7998d	.config	log	report	syz	C
ci-upstream-net-this-kasan-gce	2020/06/02 07:19	net	bdc48fa11e46	a0331e89	.config	log	report	syz	C
ci-upstream-net-this-kasan-gce	2020/03/29 09:13	net	a0ba26f37ea0	05736b29	.config	log	report	syz	C
ci-upstream-net-this-kasan-gce	2020/01/17 00:21	net	567110f147b3	3de7aabb	.config	log	report	syz	C
ci-upstream-net-this-kasan-gce	2020/01/06 10:14	net	f11421ba4af7	438e1227	.config	log	report	syz	C
ci-upstream-net-kasan-gce	2020/06/10 22:31	net-next	cb8e59cc8720	a6f7998d	.config	log	report	syz	C
ci-upstream-net-kasan-gce	2020/06/02 07:22	net-next	9a25c1df24a6	a0331e89	.config	log	report	syz	C
ci-upstream-net-kasan-gce	2020/03/29 06:52	net-next	1a147b74c2fd	05736b29	.config	log	report	syz	C
ci-upstream-net-kasan-gce	2020/01/17 00:21	net-next	1ccf6c13d9c7	3de7aabb	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/07/17 00:34	linux-next	4c43049f19a2	54b3c45e	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/06/10 22:29	linux-next	e7b08814b16b	a6f7998d	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/06/03 02:52	linux-next	e7b08814b16b	f3ba1b5b	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/05/18 06:23	linux-next	ac935d227366	37bccd4e	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/05/17 23:55	linux-next	ac935d227366	37bccd4e	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/05/06 07:05	linux-next	ac935d227366	35b8eb30	.config	log	report	syz	C
ci-upstream-linux-next-kasan-gce-root	2020/01/20 10:40	linux-next	2747d5fdab78	0342f8c7	.config	log	report	syz	C
ci-upstream-kasan-gce-selinux-root	2020/03/01 20:29	upstream	63623fd44972	c88c7b75	.config	log	report	syz
ci-upstream-kasan-gce-root	2020/02/29 11:27	upstream	f8788d86ab28	59b57593	.config	log	report	syz
ci-upstream-kasan-gce-smack-root	2020/02/27 12:54	upstream	f8788d86ab28	59b57593	.config	log	report	syz
ci-upstream-net-kasan-gce	2020/02/24 12:11	net-next	2045e158fc7f	d801cb02	.config	log	report	syz
ci-upstream-linux-next-kasan-gce-root	2020/03/13 00:06	linux-next	770fbb32d34e	d850e9d0	.config	log	report	syz
ci-qemu-upstream	2020/09/06 23:57	upstream	fffe3ae0ee84	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/09/04 14:35	upstream	e28f0104343d	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/09/03 18:52	upstream	fc3abb53250a	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/09/03 15:58	upstream	fc3abb53250a	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-root	2020/09/03 14:37	upstream	fc3abb53250a	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/09/03 12:24	upstream	fc3abb53250a	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/09/03 12:11	upstream	fc3abb53250a	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/09/03 04:36	upstream	fc3abb53250a	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-root	2020/09/03 03:09	upstream	fc3abb53250a	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-smack-root	2020/09/02 16:57	upstream	9c7d619be5a0	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/09/02 14:23	upstream	9c7d619be5a0	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/09/02 13:10	upstream	b765a32a2e91	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/09/02 05:31	upstream	b765a32a2e91	abf9ba4f	.config	log	report
ci-upstream-kasan-gce-selinux-root	2020/09/02 02:06	upstream	b765a32a2e91	abf9ba4f	.config	log	report
ci-qemu-upstream	2020/07/23 16:30	upstream	d15be546031c	70c104a1	.config	log	report
ci-qemu-upstream-386	2020/09/02 12:05	upstream	9c7d619be5a0	abf9ba4f	.config	log	report
ci-qemu-upstream-386	2020/09/01 22:54	upstream	b765a32a2e91	abf9ba4f	.config	log	report
ci-qemu-upstream-386	2020/09/01 18:36	upstream	b51594df17d0	abf9ba4f	.config	log	report
ci-upstream-net-this-kasan-gce	2020/08/28 08:50	net	af8ea1111346	816e0689	.config	log	report
ci-upstream-net-kasan-gce	2020/09/05 05:40	net-next	3ab1270bfa1e	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/05 04:00	net-next	3ab1270bfa1e	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/05 02:37	net-next	3ab1270bfa1e	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/05 00:37	net-next	3ab1270bfa1e	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 23:35	net-next	3ab1270bfa1e	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 18:13	net-next	3ab1270bfa1e	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 15:32	net-next	3ab1270bfa1e	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 13:11	net-next	3ab1270bfa1e	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 10:01	net-next	3ab1270bfa1e	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 07:06	net-next	22b330b622e3	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 05:48	net-next	22b330b622e3	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 04:33	net-next	22b330b622e3	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 04:14	net-next	22b330b622e3	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 02:38	net-next	22b330b622e3	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 01:30	net-next	22b330b622e3	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/04 00:11	net-next	22b330b622e3	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/03 23:07	net-next	22b330b622e3	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/03 21:07	net-next	22b330b622e3	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/03 20:09	net-next	22b330b622e3	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/03 11:00	net-next	d3dfc362e073	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/03 08:40	net-next	d3dfc362e073	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/03 06:55	net-next	d3dfc362e073	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/03 05:37	net-next	d3dfc362e073	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/03 00:11	net-next	d3dfc362e073	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/02 22:30	net-next	d3dfc362e073	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/02 21:47	net-next	dc1a9bf2c816	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/02 20:18	net-next	dc1a9bf2c816	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/02 15:35	net-next	dc1a9bf2c816	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/02 09:32	net-next	dc1a9bf2c816	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/02 08:00	net-next	dc1a9bf2c816	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/02 03:26	net-next	dc1a9bf2c816	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/02 00:56	net-next	dc1a9bf2c816	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/01 23:48	net-next	dc1a9bf2c816	abf9ba4f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/01 21:21	net-next	10eb46679460	d5a3ae1f	.config	log	report
ci-upstream-net-kasan-gce	2020/09/01 19:52	net-next	10eb46679460	d5a3ae1f	.config	log	report
ci-upstream-net-kasan-gce	2020/01/06 09:28	net-next	704a0afb4963	438e1227	.config	log	report
ci-upstream-linux-next-kasan-gce-root	2020/08/28 05:50	linux-next	88abac0b753d	816e0689	.config	log	report