KMSAN: uninit-value in pegasus

KMSAN: uninit-value in pegasus_probe
Status: upstream: reported C repro on 2019/10/03 19:59
Reported-by: syzbot+02c9f70f3afae308464a@syzkaller.appspotmail.com
First crash: 235d, last: 110d

Sample crash report:

usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-1: Product: syz
usb 1-1: Manufacturer: syz
usb 1-1: SerialNumber: syz
usb 1-1: config 0 descriptor??
(unnamed net_device) (uninitialized): read_eprom_word failed
=====================================================
BUG: KMSAN: uninit-value in usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0-rc7+ #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:77 [inline]
 dump_stack+0x191/0x1f0 lib/dump_stack.c:113
 kmsan_report+0x13a/0x2b0 mm/kmsan/kmsan_report.c:108
 __msan_warning+0x73/0xe0 mm/kmsan/kmsan_instr.c:250
 get_interrupt_interval drivers/net/usb/pegasus.c:758 [inline]
 pegasus_probe+0x10b7/0x4be0 drivers/net/usb/pegasus.c:1189
 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
 really_probe+0x1373/0x1dc0 drivers/base/dd.c:552
 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
 __device_attach+0x489/0x750 drivers/base/dd.c:882
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
 bus_probe_device+0x131/0x390 drivers/base/bus.c:514
 device_add+0x25b5/0x2df0 drivers/base/core.c:2165
 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+0x1373/0x1dc0 drivers/base/dd.c:552
 driver_probe_device+0x1ba/0x510 drivers/base/dd.c:709
 __device_attach_driver+0x5b8/0x790 drivers/base/dd.c:816
 bus_for_each_drv+0x28e/0x3b0 drivers/base/bus.c:454
 __device_attach+0x489/0x750 drivers/base/dd.c:882
 device_initial_probe+0x4a/0x60 drivers/base/dd.c:929
 bus_probe_device+0x131/0x390 drivers/base/bus.c:514
 device_add+0x25b5/0x2df0 drivers/base/core.c:2165
 usb_new_device+0x23e5/0x2fb0 drivers/usb/core/hub.c:2536
 hub_port_connect drivers/usb/core/hub.c:5098 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5213 [inline]
 port_event drivers/usb/core/hub.c:5359 [inline]
 hub_event+0x581d/0x72f0 drivers/usb/core/hub.c:5441
 process_one_work+0x1572/0x1ef0 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: ----data.i@pegasus_probe
Variable was created at:
 get_interrupt_interval drivers/net/usb/pegasus.c:1188 [inline]
 pegasus_probe+0xef3/0x4be0 drivers/net/usb/pegasus.c:1189
 usb_probe_interface+0xd19/0x1310 drivers/usb/core/driver.c:361
=====================================================

Crashes (43):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	Maintainers
ci-upstream-kmsan-gce	2019/09/28 07:18	https://github.com/google/kmsan.git master	124037e0	d8074e0b	.config	log	report	syz	C	gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/11/03 23:57	https://github.com/google/kmsan.git master	6f88939b	c9610487	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/27 17:37	https://github.com/google/kmsan.git master	d86c1556	25bb509e	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/27 13:30	https://github.com/google/kmsan.git master	d86c1556	25bb509e	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/27 10:00	https://github.com/google/kmsan.git master	d86c1556	25bb509e	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/26 19:14	https://github.com/google/kmsan.git master	d86c1556	25bb509e	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/26 14:39	https://github.com/google/kmsan.git master	d86c1556	413926c5	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/26 02:02	https://github.com/google/kmsan.git master	d86c1556	c2e837da	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/25 06:13	https://github.com/google/kmsan.git master	d86c1556	d01bb02a	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/24 03:39	https://github.com/google/kmsan.git master	ba606e9d	b602d64b	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/21 22:20	https://github.com/google/kmsan.git master	3c8ca708	b24d2b8a	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/20 12:15	https://github.com/google/kmsan.git master	3c8ca708	8c88c9c1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/20 09:13	https://github.com/google/kmsan.git master	3c8ca708	8c88c9c1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/20 07:35	https://github.com/google/kmsan.git master	3c8ca708	8c88c9c1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/20 03:18	https://github.com/google/kmsan.git master	3c8ca708	8c88c9c1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/20 03:15	https://github.com/google/kmsan.git master	3c8ca708	8c88c9c1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/19 19:07	https://github.com/google/kmsan.git master	3c8ca708	8c88c9c1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/19 18:06	https://github.com/google/kmsan.git master	3c8ca708	8c88c9c1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/19 17:28	https://github.com/google/kmsan.git master	3c8ca708	8c88c9c1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/19 11:34	https://github.com/google/kmsan.git master	3c8ca708	8c88c9c1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/19 03:12	https://github.com/google/kmsan.git master	3c8ca708	8c88c9c1	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/15 06:43	https://github.com/google/kmsan.git master	c2453450	05ad7292	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/14 06:06	https://github.com/google/kmsan.git master	fa169025	2f661ec4	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/13 06:05	https://github.com/google/kmsan.git master	fa169025	426631dd	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/13 03:23	https://github.com/google/kmsan.git master	fa169025	426631dd	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/13 00:32	https://github.com/google/kmsan.git master	fa169025	426631dd	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com
ci-upstream-kmsan-gce	2019/10/12 03:03	https://github.com/google/kmsan.git master	dde80316	426631dd	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu
ci-upstream-kmsan-gce	2019/10/11 09:09	https://github.com/google/kmsan.git master	c38191cb	1a3bad90	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu
ci-upstream-kmsan-gce	2019/10/11 05:03	https://github.com/google/kmsan.git master	c38191cb	1a3bad90	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu
ci-upstream-kmsan-gce	2019/10/10 16:27	https://github.com/google/kmsan.git master	c38191cb	a4efa8c0	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu
ci-upstream-kmsan-gce	2019/10/07 07:30	https://github.com/google/kmsan.git master	1e76a3e5	f3f7d9c8	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/10/07 00:19	https://github.com/google/kmsan.git master	1e76a3e5	f3f7d9c8	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/10/06 23:49	https://github.com/google/kmsan.git master	1e76a3e5	f3f7d9c8	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/10/06 13:22	https://github.com/google/kmsan.git master	1e76a3e5	f3f7d9c8	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/10/06 08:53	https://github.com/google/kmsan.git master	1e76a3e5	f3f7d9c8	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/10/05 05:09	https://github.com/google/kmsan.git master	1e76a3e5	f3f7d9c8	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/10/04 23:50	https://github.com/google/kmsan.git master	1e76a3e5	f3f7d9c8	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/09/30 05:51	https://github.com/google/kmsan.git master	124037e0	c1ad5441	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/09/30 02:13	https://github.com/google/kmsan.git master	124037e0	c1ad5441	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/09/28 23:26	https://github.com/google/kmsan.git master	124037e0	eb6b9855	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/09/28 10:11	https://github.com/google/kmsan.git master	124037e0	d8074e0b	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/09/28 06:25	https://github.com/google/kmsan.git master	124037e0	d8074e0b	.config	log	report			gregkh@linuxfoundation.org, kai.heng.feng@canonical.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, stern@rowland.harvard.edu, yuehaibing@huawei.com
ci-upstream-kmsan-gce	2019/07/01 17:34	https://github.com/google/kmsan.git master	41550654	907bf746	.config	log	report			davem@davemloft.net, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org, netdev@vger.kernel.org, petkan@nucleusys.com