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: 640d, last: 43m

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: SerialNumber: syz
usb 1-1: config 0 descriptor??
r8712u: register rtl8712_netdev_ops to netdev_ops
usb 1-1: r8712u: USB_SPEED_HIGH with 3 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: 2011 Comm: kworker/0:2 Not tainted 5.11.0-rc7-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+0x21c/0x280 lib/dump_stack.c:120
 kmsan_report+0xfb/0x1e0 mm/kmsan/kmsan_report.c:118
 __msan_warning+0x5f/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:2619
 va_format lib/vsprintf.c:1663 [inline]
 pointer+0x1b8a/0x1ca0 lib/vsprintf.c:2257
 vsnprintf+0x15f2/0x3600 lib/vsprintf.c:2623
 vprintk_store+0x2ab/0x1df0 kernel/printk/printk.c:1984
 vprintk_emit+0x29a/0x7f0 kernel/printk/printk.c:2092
 dev_vprintk_emit+0x5f7/0x6d8 drivers/base/core.c:4301
 dev_printk_emit+0x1ce/0x210 drivers/base/core.c:4312
 __dev_printk+0x3dc/0x458 drivers/base/core.c:4324
 _dev_info+0x1e5/0x22a drivers/base/core.c:4370
 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:558
 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
 __device_attach+0x56a/0x890 drivers/base/dd.c:914
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
 device_add+0x2c15/0x31d0 drivers/base/core.c:3109
 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:558
 driver_probe_device+0x29d/0x3a0 drivers/base/dd.c:740
 __device_attach_driver+0x63f/0x830 drivers/base/dd.c:846
 bus_for_each_drv+0x2c8/0x3f0 drivers/base/bus.c:431
 __device_attach+0x56a/0x890 drivers/base/dd.c:914
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:961
 bus_probe_device+0x17e/0x3d0 drivers/base/bus.c:491
 device_add+0x2c15/0x31d0 drivers/base/core.c:3109
 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:296

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 (1717):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kmsan-gce	2021/03/06 19:04	https://github.com/google/kmsan.git master	29ad81a1	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	73d62e81	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	6f88939b	a41ca8fa	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/10/24 14:36	https://github.com/google/kmsan.git master	d86c1556	d01bb02a	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/10/13 00:23	https://github.com/google/kmsan.git master	fa169025	426631dd	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/10/03 08:22	https://github.com/google/kmsan.git master	1e76a3e5	2e29b534	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/10/02 14:40	https://github.com/google/kmsan.git master	1e76a3e5	2e29b534	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/30 17:40	https://github.com/google/kmsan.git master	f5f9d3ce	c7a4fb99	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/29 11:04	https://github.com/google/kmsan.git master	124037e0	c1ad5441	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/21 09:39	https://github.com/google/kmsan.git master	cebbfdbc	d96e88f3	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/20 19:03	https://github.com/google/kmsan.git master	cebbfdbc	d96e88f3	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/15 18:47	https://github.com/google/kmsan.git master	cebbfdbc	32d59357	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/08 01:45	https://github.com/google/kmsan.git master	014077b5	a60cb4cd	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/06 14:12	https://github.com/google/kmsan.git master	040b8306	040fda58	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/09/05 00:54	https://github.com/google/kmsan.git master	83f99205	040fda58	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/08/22 15:47	https://github.com/google/kmsan.git master	61ccdad1	984250d5	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/08/04 08:14	https://github.com/google/kmsan.git master	beaab8a3	6affd8e8	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/07/31 11:20	https://github.com/google/kmsan.git master	beaab8a3	7c7ded69	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/07/21 10:58	https://github.com/google/kmsan.git master	beaab8a3	1656845f	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/07/13 22:59	https://github.com/google/kmsan.git master	7280182c	e6fb0f13	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/07/08 04:45	https://github.com/google/kmsan.git master	f23a6010	f62e1e85	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/06/06 02:03	https://github.com/google/kmsan.git master	f75e4cfe	bfb4a51e	.config	log	report	syz	C
ci-upstream-kmsan-gce	2019/06/06 00:49	https://github.com/google/kmsan.git master	f75e4cfe	bfb4a51e	.config	log	report	syz
ci-upstream-kmsan-gce	2021/03/07 01:59	https://github.com/google/kmsan.git master	29ad81a1	e4b4d570	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/06 16:18	https://github.com/google/kmsan.git master	29ad81a1	e4b4d570	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/05 19:01	https://github.com/google/kmsan.git master	29ad81a1	9d751681	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/05 15:13	https://github.com/google/kmsan.git master	29ad81a1	9d751681	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/05 12:14	https://github.com/google/kmsan.git master	29ad81a1	9d751681	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/05 07:47	https://github.com/google/kmsan.git master	29ad81a1	9d751681	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/05 06:26	https://github.com/google/kmsan.git master	29ad81a1	9d751681	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/05 04:29	https://github.com/google/kmsan.git master	29ad81a1	9d751681	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/04 09:30	https://github.com/google/kmsan.git master	29ad81a1	d7e4e604	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/03 22:02	https://github.com/google/kmsan.git master	29ad81a1	06ed56cd	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/03 14:35	https://github.com/google/kmsan.git master	29ad81a1	e5b64d68	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/02 06:04	https://github.com/google/kmsan.git master	29ad81a1	183afb6c	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/02 03:38	https://github.com/google/kmsan.git master	29ad81a1	183afb6c	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/01 18:18	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/01 08:55	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/01 05:53	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/01 05:31	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/03/01 04:31	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/02/28 21:48	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/02/28 19:54	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/02/28 14:14	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/02/27 09:30	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/02/27 04:45	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/02/27 02:14	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/02/26 20:30	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/02/26 20:30	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/02/26 19:27	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce	2021/02/25 23:23	https://github.com/google/kmsan.git master	29ad81a1	76f7fc95	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/03/07 03:01	https://github.com/google/kmsan.git master	29ad81a1	e4b4d570	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/03/07 00:31	https://github.com/google/kmsan.git master	29ad81a1	e4b4d570	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/03/06 17:39	https://github.com/google/kmsan.git master	29ad81a1	e4b4d570	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/03/05 19:01	https://github.com/google/kmsan.git master	29ad81a1	9d751681	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/03/05 16:59	https://github.com/google/kmsan.git master	29ad81a1	9d751681	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/03/04 18:55	https://github.com/google/kmsan.git master	29ad81a1	d7e4e604	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/03/04 16:26	https://github.com/google/kmsan.git master	29ad81a1	d7e4e604	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/03/01 17:15	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/03/01 14:48	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/03/01 02:53	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/02/28 13:05	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/02/28 08:28	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/02/28 06:56	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/02/28 02:33	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/02/28 01:14	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/02/27 20:38	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/02/27 16:00	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/02/27 11:06	https://github.com/google/kmsan.git master	29ad81a1	4c37c133	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/02/26 10:02	https://github.com/google/kmsan.git master	29ad81a1	76f7fc95	.config	log	report			info	KMSAN: uninit-value in r871xu_drv_init
ci-upstream-kmsan-gce-386	2021/02/26 06:05	https://github.com/google/kmsan.git master	29ad81a1	76f7fc95	.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	73d62e81	65a7a854	.config	log	report			info
ci-upstream-kmsan-gce	2019/06/06 00:00	https://github.com/google/kmsan.git master	f75e4cfe	bfb4a51e	.config	log	report