KMSAN: uninit-value in dib3000mb

KMSAN: uninit-value in dib3000mb_attach (2)
Status: upstream: reported C repro on 2020/10/23 08:07
Reported-by: syzbot+c88fc0ebe0d5935c70da@syzkaller.appspotmail.com
First crash: 938d, last: 11m

similar bugs (1):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	KMSAN: uninit-value in dib3000mb_attach	C			3	938d	939d	0/22	closed as invalid on 2019/06/24 13:36

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2021/03/25 21:55	46m	alaaemadhossney.ae@gmail.com		https://github.com/google/kmsan.git master	OK

Sample crash report:

dvb-usb: will use the device's hardware PID filter (table count: 16).
dvbdev: DVB: registering new adapter (Grandtec USB1.1 DVB-T)
usb 1-1: media controller created
dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
dvb-usb: bulk message failed: -22 (6/-30592)
==================================================================
BUG: KMSAN: uninit-value in dib3000mb_attach+0x340/0x450 drivers/media/dvb-frontends/dib3000mb.c:762
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.2.0-rc4+ #5
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x162/0x2d0 mm/kmsan/kmsan.c:611
 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:304
 dib3000mb_attach+0x340/0x450 drivers/media/dvb-frontends/dib3000mb.c:762
 dibusb_dib3000mb_frontend_attach+0x1af/0x3b0 drivers/media/usb/dvb-usb/dibusb-mb.c:34
 dvb_usb_adapter_frontend_init+0x105/0xa00 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:291
 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:84 [inline]
 dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:160 [inline]
 dvb_usb_device_init+0x2297/0x2cc0 drivers/media/usb/dvb-usb/dvb-usb-init.c:274
 dibusb_probe+0x75/0x280 drivers/media/usb/dvb-usb/dibusb-mb.c:113
 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
 really_probe+0x1344/0x1d90 drivers/base/dd.c:513
 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:670
 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:777
 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
 __device_attach+0x489/0x750 drivers/base/dd.c:843
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:890
 bus_probe_device+0x131/0x390 drivers/base/bus.c:514
 device_add+0x25b5/0x2df0 drivers/base/core.c:2111
 usb_set_configuration+0x309f/0x3710 drivers/usb/core/message.c:2027
 generic_probe+0xe7/0x280 drivers/usb/core/generic.c:210
 usb_probe_device+0x146/0x200 drivers/usb/core/driver.c:266
 really_probe+0x1344/0x1d90 drivers/base/dd.c:513
 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:670
 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:777
 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
 __device_attach+0x489/0x750 drivers/base/dd.c:843
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:890
 bus_probe_device+0x131/0x390 drivers/base/bus.c:514
 device_add+0x25b5/0x2df0 drivers/base/core.c:2111
 usb_new_device+0x23e5/0x2fb0 drivers/usb/core/hub.c:2534
 hub_port_connect drivers/usb/core/hub.c:5089 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5204 [inline]
 port_event drivers/usb/core/hub.c:5350 [inline]
 hub_event+0x5853/0x7320 drivers/usb/core/hub.c:5432
 process_one_work+0x1572/0x1f00 kernel/workqueue.c:2269
 worker_thread+0x111b/0x2460 kernel/workqueue.c:2415
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355

Local variable description: ----rb@dib3000_read_reg
Variable was created at:
 dib3000_read_reg+0xdb/0x540 drivers/media/dvb-frontends/dib3000mb.c:58
 dib3000mb_attach+0x17d/0x450 drivers/media/dvb-frontends/dib3000mb.c:762
==================================================================

Crashes (845):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kmsan-gce	2019/06/24 18:41	https://github.com/google/kmsan.git master	3351e2b9635b	472f0082	.config	log	report	syz	C
ci-upstream-kmsan-gce	2022/01/17 19:00	https://github.com/google/kmsan.git master	fa3879a274df	731a2d23	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/17 17:52	https://github.com/google/kmsan.git master	fa3879a274df	731a2d23	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/17 07:26	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/17 01:01	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/16 17:30	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/16 16:10	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/16 05:42	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/16 03:55	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/15 20:41	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/15 17:10	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/15 14:37	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/15 07:12	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/15 02:31	https://github.com/google/kmsan.git master	fa3879a274df	53e00b45	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/14 23:08	https://github.com/google/kmsan.git master	fa3879a274df	53e00b45	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/14 21:42	https://github.com/google/kmsan.git master	fa3879a274df	53e00b45	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/14 13:02	https://github.com/google/kmsan.git master	fa3879a274df	b8d780ab	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/13 18:56	https://github.com/google/kmsan.git master	fa3879a274df	44d1319a	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/13 15:55	https://github.com/google/kmsan.git master	fa3879a274df	44d1319a	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/13 12:31	https://github.com/google/kmsan.git master	fa3879a274df	44d1319a	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/13 08:05	https://github.com/google/kmsan.git master	fa3879a274df	44d1319a	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/13 05:57	https://github.com/google/kmsan.git master	fa3879a274df	44d1319a	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/12 10:00	https://github.com/google/kmsan.git master	fa3879a274df	44d1319a	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/12 09:37	https://github.com/google/kmsan.git master	fa3879a274df	44d1319a	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/10 14:45	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/10 13:33	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/10 08:30	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/10 07:09	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/09 23:15	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/09 10:41	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/09 04:10	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/08 21:44	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/07 19:56	https://github.com/google/kmsan.git master	81c325bbf94e	2ca0d385	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/06 06:40	https://github.com/google/kmsan.git master	81c325bbf94e	6acc789a	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/06 00:13	https://github.com/google/kmsan.git master	81c325bbf94e	6acc789a	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/05 14:10	https://github.com/google/kmsan.git master	81c325bbf94e	0a2584dd	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/05 09:49	https://github.com/google/kmsan.git master	81c325bbf94e	0a2584dd	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/05 06:30	https://github.com/google/kmsan.git master	81c325bbf94e	0a2584dd	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/04 16:55	https://github.com/google/kmsan.git master	81c325bbf94e	0a2584dd	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/04 14:24	https://github.com/google/kmsan.git master	81c325bbf94e	7f723fbe	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/03 09:01	https://github.com/google/kmsan.git master	81c325bbf94e	e1768e9c	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/02 03:15	https://github.com/google/kmsan.git master	81c325bbf94e	e1768e9c	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/01 23:30	https://github.com/google/kmsan.git master	81c325bbf94e	e1768e9c	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2022/01/01 02:24	https://github.com/google/kmsan.git master	81c325bbf94e	e1768e9c	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce-386	2022/01/18 07:07	https://github.com/google/kmsan.git master	fa3879a274df	731a2d23	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce-386	2022/01/15 09:30	https://github.com/google/kmsan.git master	fa3879a274df	723cfaf0	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce-386	2022/01/05 01:38	https://github.com/google/kmsan.git master	81c325bbf94e	0a2584dd	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce-386	2021/12/30 19:18	https://github.com/google/kmsan.git master	81c325bbf94e	2e49f10d	.config	log	report			info	KMSAN: uninit-value in dib3000mb_attach
ci-upstream-kmsan-gce	2021/01/17 03:04	https://github.com/google/kmsan.git master	73d62e81b476	65a7a854	.config	log	report			info
ci-upstream-kmsan-gce	2019/06/24 17:25	https://github.com/google/kmsan.git master	3351e2b9635b	472f0082	.config	log	report