KMSAN: uninit-value in r871xu_drv

KMSAN: uninit-value in r871xu_drv_init
Status: upstream: reported C repro on 2019/06/06 13:52
Reported-by: syzbot+6f5ecd144854c0d8580b@syzkaller.appspotmail.com
First crash: 837d, last: 45d

Patch testing requests:
Created	Duration	User	Patch	Repo	Result
2020/09/18 20:30	19m	anant.thazhemadam@gmail.com		https://github.com/google/kmsan.git master	OK

Sample crash report:

usb 1-1: New USB device found, idVendor=13d3, idProduct=3339, bcdDevice=f9.1f
usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
r8712u: register rtl8712_netdev_ops to netdev_ops
usb 1-1: r8712u: USB_SPEED_HIGH with 0 endpoints
=====================================================
BUG: KMSAN: uninit-value in string_nocheck lib/vsprintf.c:611 [inline]
BUG: KMSAN: uninit-value in string+0x573/0x6d0 lib/vsprintf.c:693
CPU: 0 PID: 7 Comm: kworker/0:1 Not tainted 5.12.0-rc6-syzkaller #0
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:79 [inline]
 dump_stack+0x24c/0x2e0 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:121
 __msan_warning+0x5c/0xa0 mm/kmsan/kmsan_instr.c:197
 string_nocheck lib/vsprintf.c:611 [inline]
 string+0x573/0x6d0 lib/vsprintf.c:693
 vsnprintf+0x1acd/0x3600 lib/vsprintf.c:2651
 va_format lib/vsprintf.c:1663 [inline]
 pointer+0x1cbb/0x1ea0 lib/vsprintf.c:2283
 vsnprintf+0x15f2/0x3600 lib/vsprintf.c:2655
 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1990
 vprintk_emit+0x28e/0x8b0 kernel/printk/printk.c:2098
 dev_vprintk_emit+0x5f7/0x6d8 drivers/base/core.c:4434
 dev_printk_emit+0x1ce/0x210 drivers/base/core.c:4445
 __dev_printk+0x3dc/0x458 drivers/base/core.c:4457
 _dev_info+0x1e5/0x22a drivers/base/core.c:4503
 r871xu_drv_init+0x1a59/0x2fe0 drivers/staging/rtl8712/usb_intf.c:404
 usb_probe_interface+0xfcc/0x1520 drivers/usb/core/driver.c:396
 really_probe+0xe15/0x24d0 drivers/base/dd.c:561
 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743
 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849
 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
 __device_attach+0x56a/0x890 drivers/base/dd.c:917
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964
 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
 device_add+0x2c15/0x31d0 drivers/base/core.c:3242
 usb_set_configuration+0x3872/0x3eb0 drivers/usb/core/message.c:2164
 usb_generic_driver_probe+0x138/0x300 drivers/usb/core/generic.c:238
 usb_probe_device+0x317/0x570 drivers/usb/core/driver.c:293
 really_probe+0xe15/0x24d0 drivers/base/dd.c:561
 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:743
 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:849
 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
 __device_attach+0x56a/0x890 drivers/base/dd.c:917
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:964
 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
 device_add+0x2c15/0x31d0 drivers/base/core.c:3242
 usb_new_device+0x1bd4/0x2a30 drivers/usb/core/hub.c:2555
 hub_port_connect drivers/usb/core/hub.c:5223 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5363 [inline]
 port_event drivers/usb/core/hub.c:5509 [inline]
 hub_event+0x5b99/0x8870 drivers/usb/core/hub.c:5591
 process_one_work+0x1219/0x1fe0 kernel/workqueue.c:2275
 worker_thread+0x10ec/0x2340 kernel/workqueue.c:2421
 kthread+0x521/0x560 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Local variable ----data@usb_read8 created at:
 usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33
 usb_read8+0x5d/0x130 drivers/staging/rtl8712/usb_ops.c:33
=====================================================

Crashes (3058):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kmsan-gce	2021/06/20 20:43	https://github.com/google/kmsan.git master	6a6a67f21dec	aba2b2fb	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/05/09 00:39	https://github.com/google/kmsan.git master	4ebaab5fb428	bc5434be	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/05/06 23:31	https://github.com/google/kmsan.git master	4ebaab5fb428	06585184	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/05/06 01:52	https://github.com/google/kmsan.git master	4ebaab5fb428	06c27ff5	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/05/05 05:29	https://github.com/google/kmsan.git master	4ebaab5fb428	06c27ff5	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/05/01 22:58	https://github.com/google/kmsan.git master	4ebaab5fb428	77e2b668	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/04/28 10:08	https://github.com/google/kmsan.git master	4ebaab5fb428	805b5003	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/04/26 03:40	https://github.com/google/kmsan.git master	4ebaab5fb428	2a82f1b3	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/04/20 09:15	https://github.com/google/kmsan.git master	4ebaab5fb428	4285c989	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/04/18 17:42	https://github.com/google/kmsan.git master	4ebaab5fb428	7e2b734b	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/04/02 21:54	https://github.com/google/kmsan.git master	29ad81a1074a	6a81331a	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/04/02 21:22	https://github.com/google/kmsan.git master	29ad81a1074a	6a81331a	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/29 13:01	https://github.com/google/kmsan.git master	29ad81a1074a	a8529b82	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/23 06:42	https://github.com/google/kmsan.git master	29ad81a1074a	8092f30d	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/22 00:12	https://github.com/google/kmsan.git master	29ad81a1074a	bea32f74	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/19 12:08	https://github.com/google/kmsan.git master	29ad81a1074a	380dcc3e	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/17 05:06	https://github.com/google/kmsan.git master	29ad81a1074a	fdb2bb2c	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/15 12:52	https://github.com/google/kmsan.git master	29ad81a1074a	cc1cff8f	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/13 06:51	https://github.com/google/kmsan.git master	29ad81a1074a	429d8a6b	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/11 20:55	https://github.com/google/kmsan.git master	29ad81a1074a	c2ca1f2a	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/06 19:04	https://github.com/google/kmsan.git master	29ad81a1074a	e4b4d570	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/01/22 04:00	https://github.com/google/kmsan.git master	73d62e81b476	d4f4eca5	.config	log	report	syz	C		KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2019/10/31 20:19	https://github.com/google/kmsan.git master	6f88939b3fa3	a41ca8fa	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/10/24 14:36	https://github.com/google/kmsan.git master	d86c15562d02	d01bb02a	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/10/13 00:23	https://github.com/google/kmsan.git master	fa1690255288	426631dd	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/10/03 08:22	https://github.com/google/kmsan.git master	1e76a3e537c3	2e29b534	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/10/02 14:40	https://github.com/google/kmsan.git master	1e76a3e537c3	2e29b534	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/30 17:40	https://github.com/google/kmsan.git master	f5f9d3ce4686	c7a4fb99	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/29 11:04	https://github.com/google/kmsan.git master	124037e07586	c1ad5441	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/21 09:39	https://github.com/google/kmsan.git master	cebbfdbcf2b7	d96e88f3	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/20 19:03	https://github.com/google/kmsan.git master	cebbfdbcf2b7	d96e88f3	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/15 18:47	https://github.com/google/kmsan.git master	cebbfdbcf2b7	32d59357	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/08 01:45	https://github.com/google/kmsan.git master	014077b5cd62	a60cb4cd	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/06 14:12	https://github.com/google/kmsan.git master	040b8306f758	040fda58	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/05 00:54	https://github.com/google/kmsan.git master	83f99205d6a8	040fda58	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/08/22 15:47	https://github.com/google/kmsan.git master	61ccdad1fcdf	984250d5	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/08/04 08:14	https://github.com/google/kmsan.git master	beaab8a31e0d	6affd8e8	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/07/31 11:20	https://github.com/google/kmsan.git master	beaab8a31e0d	7c7ded69	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/07/21 10:58	https://github.com/google/kmsan.git master	beaab8a31e0d	1656845f	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/07/13 22:59	https://github.com/google/kmsan.git master	7280182c67ba	e6fb0f13	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/07/08 04:45	https://github.com/google/kmsan.git master	f23a6010183e	f62e1e85	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/06/06 02:03	https://github.com/google/kmsan.git master	f75e4cfea97f	bfb4a51e	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/06/06 00:49	https://github.com/google/kmsan.git master	f75e4cfea97f	bfb4a51e	.config	log	report	syz
ci-upstream-kmsan-gce	2021/08/05 03:44	https://github.com/google/kmsan.git master	b87ff0bc1209	b97d64c9	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/08/02 12:15	https://github.com/google/kmsan.git master	dfab4dc3af38	6c236867	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/08/01 16:59	https://github.com/google/kmsan.git master	dfab4dc3af38	6c236867	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/31 12:18	https://github.com/google/kmsan.git master	dfab4dc3af38	6c236867	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/31 07:15	https://github.com/google/kmsan.git master	a2a37c61659d	6c236867	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/30 09:54	https://github.com/google/kmsan.git master	e89364d49ff0	c585c7b0	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/30 05:54	https://github.com/google/kmsan.git master	e89364d49ff0	c585c7b0	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/29 19:40	https://github.com/google/kmsan.git master	e89364d49ff0	b44001ce	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/26 05:09	https://github.com/google/kmsan.git master	a43e029dee89	4d1b57d4	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/25 15:00	https://github.com/google/kmsan.git master	a43e029dee89	4d1b57d4	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/25 11:31	https://github.com/google/kmsan.git master	a43e029dee89	4d1b57d4	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/25 10:58	https://github.com/google/kmsan.git master	a43e029dee89	4d1b57d4	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/24 22:05	https://github.com/google/kmsan.git master	a43e029dee89	4d1b57d4	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/23 23:29	https://github.com/google/kmsan.git master	a43e029dee89	bc5f1d88	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/22 04:15	https://github.com/google/kmsan.git master	aeb985b98bde	29c3f20f	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/21 23:16	https://github.com/google/kmsan.git master	aeb985b98bde	29c3f20f	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/20 03:17	https://github.com/google/kmsan.git master	4edbed3bb57c	bc48c9ab	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/17 22:48	https://github.com/google/kmsan.git master	a0f3a2c4404f	f115ae98	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/16 18:30	https://github.com/google/kmsan.git master	a0f3a2c4404f	f115ae98	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/15 23:28	https://github.com/google/kmsan.git master	57b5797c8013	b9a2f64e	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/15 23:28	https://github.com/google/kmsan.git master	57b5797c8013	b9a2f64e	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/12 04:11	https://github.com/google/kmsan.git master	57b5797c8013	8f5a7b8c	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/09 19:48	https://github.com/google/kmsan.git master	57b5797c8013	281e815f	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/09 05:20	https://github.com/google/kmsan.git master	57b5797c8013	1b20171a	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/09 02:48	https://github.com/google/kmsan.git master	57b5797c8013	1b20171a	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/05 18:23	https://github.com/google/kmsan.git master	57b5797c8013	55aa55c2	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/05 13:46	https://github.com/google/kmsan.git master	57b5797c8013	55aa55c2	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/05 11:58	https://github.com/google/kmsan.git master	57b5797c8013	55aa55c2	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/03 17:07	https://github.com/google/kmsan.git master	57b5797c8013	55aa55c2	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/03 14:03	https://github.com/google/kmsan.git master	57b5797c8013	55aa55c2	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/01 18:15	https://github.com/google/kmsan.git master	57b5797c8013	658ebc66	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/01 06:18	https://github.com/google/kmsan.git master	57b5797c8013	38a885d1	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/07/01 00:29	https://github.com/google/kmsan.git master	57b5797c8013	38a885d1	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/06/29 18:01	https://github.com/google/kmsan.git master	57b5797c8013	9d2ab5df	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/06/29 05:46	https://github.com/google/kmsan.git master	57b5797c8013	9d2ab5df	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/08/06 06:25	https://github.com/google/kmsan.git master	ee9407ea37bf	d2d6e680	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/08/01 22:40	https://github.com/google/kmsan.git master	dfab4dc3af38	6c236867	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/07/31 23:52	https://github.com/google/kmsan.git master	dfab4dc3af38	6c236867	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/07/31 19:57	https://github.com/google/kmsan.git master	dfab4dc3af38	6c236867	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/07/31 19:14	https://github.com/google/kmsan.git master	dfab4dc3af38	6c236867	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/07/24 05:59	https://github.com/google/kmsan.git master	a43e029dee89	bc5f1d88	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/07/20 08:05	https://github.com/google/kmsan.git master	4edbed3bb57c	bc48c9ab	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/07/11 15:02	https://github.com/google/kmsan.git master	57b5797c8013	8f5a7b8c	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/07/09 02:59	https://github.com/google/kmsan.git master	57b5797c8013	1b20171a	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/07/07 22:03	https://github.com/google/kmsan.git master	57b5797c8013	4846d5c1	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/07/02 00:22	https://github.com/google/kmsan.git master	57b5797c8013	658ebc66	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/07/01 18:14	https://github.com/google/kmsan.git master	57b5797c8013	658ebc66	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/01/16 22:13	https://github.com/google/kmsan.git master	73d62e81b476	65a7a854	.config	log	report			info
ci-upstream-kmsan-gce	2019/06/06 00:00	https://github.com/google/kmsan.git master	f75e4cfea97f	bfb4a51e	.config	log	report