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KMSAN: uninit-value in mii_nway_restart
Status: upstream: reported C repro on 2019/06/04 10:32
Reported-by: syzbot+1f53a30781af65d2c955@syzkaller.appspotmail.com
First crash: 1087d, last: 452d
Patch testing requests:
Created Duration User Patch Repo Result
2020/09/20 16:36 19m anant.thazhemadam@gmail.com https://github.com/google/kmsan.git master OK

Sample crash report:
ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x000e: -71
ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x000d: -71
ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to write reg index 0x000e: -71
ax88179_178a 1-1:0.239 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
==================================================================
BUG: KMSAN: uninit-value in mii_nway_restart+0x141/0x260 drivers/net/mii.c:467
CPU: 0 PID: 2902 Comm: kworker/0:2 Not tainted 5.3.0-rc3+ #17
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_report.c:109
 __msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:294
 mii_nway_restart+0x141/0x260 drivers/net/mii.c:467
 ax88179_bind+0xee3/0x1a10 drivers/net/usb/ax88179_178a.c:1317
 usbnet_probe+0x10ae/0x3960 drivers/net/usb/usbnet.c:1722
 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:2114
 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:2114
 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
 process_scheduled_works kernel/workqueue.c:2331 [inline]
 worker_thread+0x189c/0x2460 kernel/workqueue.c:2417
 kthread+0x4b5/0x4f0 kernel/kthread.c:256
 ret_from_fork+0x35/0x40 arch/x86/entry/entry_64.S:355

Local variable description: ----buf.i@ax88179_mdio_read
Variable was created at:
 __ax88179_read_cmd include/linux/netdevice.h:2180 [inline]
 ax88179_read_cmd drivers/net/usb/ax88179_178a.c:299 [inline]
 ax88179_mdio_read+0x7b/0x240 drivers/net/usb/ax88179_178a.c:357
 mii_nway_restart+0xcf/0x260 drivers/net/mii.c:465
==================================================================

Crashes (98):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kmsan-gce 2019/08/12 00:31 https://github.com/google/kmsan.git master 61ccdad1fcdf acb51638 .config log report syz C
ci-upstream-kmsan-gce 2019/08/11 10:37 https://github.com/google/kmsan.git master 61ccdad1fcdf acb51638 .config log report syz C
ci-upstream-kmsan-gce 2019/08/09 17:23 https://github.com/google/kmsan.git master 61ccdad1fcdf ede31a9b .config log report syz C
ci-upstream-kmsan-gce 2019/07/28 02:28 https://github.com/google/kmsan.git master beaab8a31e0d c85e1c5b .config log report syz C
ci-upstream-kmsan-gce 2019/07/02 09:57 https://github.com/google/kmsan.git master 41550654dedf cccc4302 .config log report syz C
ci-upstream-kmsan-gce 2019/06/04 08:56 https://github.com/google/kmsan.git master f75e4cfea97f ce07a7ae .config log report syz C
ci-upstream-kmsan-gce 2021/02/28 13:20 https://github.com/google/kmsan.git master 29ad81a1074a 4c37c133 .config log report info KMSAN: uninit-value in mii_nway_restart
ci-upstream-kmsan-gce 2021/02/26 23:42 https://github.com/google/kmsan.git master 29ad81a1074a 4c37c133 .config log report info KMSAN: uninit-value in mii_nway_restart
ci-upstream-kmsan-gce 2019/10/28 14:47 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config log report
ci-upstream-kmsan-gce 2019/10/27 20:23 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config log report
ci-upstream-kmsan-gce 2019/10/27 03:35 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config log report
ci-upstream-kmsan-gce 2019/10/26 20:29 https://github.com/google/kmsan.git master d86c15562d02 25bb509e .config log report
ci-upstream-kmsan-gce 2019/10/25 22:39 https://github.com/google/kmsan.git master d86c15562d02 c2e837da .config log report
ci-upstream-kmsan-gce 2019/10/25 17:57 https://github.com/google/kmsan.git master d86c15562d02 c2e837da .config log report
ci-upstream-kmsan-gce 2019/10/24 22:36 https://github.com/google/kmsan.git master d86c15562d02 d01bb02a .config log report
ci-upstream-kmsan-gce 2019/10/23 18:13 https://github.com/google/kmsan.git master 3c8ca70889aa b602d64b .config log report
ci-upstream-kmsan-gce 2019/10/23 11:08 https://github.com/google/kmsan.git master 3c8ca70889aa d0686497 .config log report
ci-upstream-kmsan-gce 2019/10/23 06:24 https://github.com/google/kmsan.git master 3c8ca70889aa d0686497 .config log report
ci-upstream-kmsan-gce 2019/10/22 18:38 https://github.com/google/kmsan.git master 3c8ca70889aa 5681358a .config log report
ci-upstream-kmsan-gce 2019/10/20 11:06 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/20 04:02 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/19 22:56 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/19 19:34 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/19 15:10 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/19 11:07 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/19 06:22 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/18 23:05 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/18 21:00 https://github.com/google/kmsan.git master 3c8ca70889aa 8c88c9c1 .config log report
ci-upstream-kmsan-gce 2019/10/15 16:30 https://github.com/google/kmsan.git master c24534505750 b5268b89 .config log report
ci-upstream-kmsan-gce 2019/10/14 07:41 https://github.com/google/kmsan.git master fa1690255288 2f661ec4 .config log report
ci-upstream-kmsan-gce 2019/10/14 05:20 https://github.com/google/kmsan.git master fa1690255288 2f661ec4 .config log report
ci-upstream-kmsan-gce 2019/10/11 12:52 https://github.com/google/kmsan.git master c38191cb7026 1a3bad90 .config log report
ci-upstream-kmsan-gce 2019/10/11 07:01 https://github.com/google/kmsan.git master c38191cb7026 1a3bad90 .config log report
ci-upstream-kmsan-gce 2019/10/09 01:28 https://github.com/google/kmsan.git master cebb918b7474 b1ebbfef .config log report
ci-upstream-kmsan-gce 2019/10/08 17:57 https://github.com/google/kmsan.git master cebb918b7474 b1ebbfef .config log report
ci-upstream-kmsan-gce 2019/10/08 11:25 https://github.com/google/kmsan.git master cebb918b7474 28ac6e64 .config log report
ci-upstream-kmsan-gce 2019/10/07 03:20 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config log report
ci-upstream-kmsan-gce 2019/10/06 13:03 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config log report
ci-upstream-kmsan-gce 2019/10/06 11:59 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config log report
ci-upstream-kmsan-gce 2019/10/06 09:37 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config log report
ci-upstream-kmsan-gce 2019/10/06 01:01 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config log report
ci-upstream-kmsan-gce 2019/10/05 20:46 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config log report
ci-upstream-kmsan-gce 2019/10/05 12:33 https://github.com/google/kmsan.git master 1e76a3e537c3 f3f7d9c8 .config log report
ci-upstream-kmsan-gce 2019/10/04 11:05 https://github.com/google/kmsan.git master 1e76a3e537c3 fc17ba49 .config log report
ci-upstream-kmsan-gce 2019/10/02 19:40 https://github.com/google/kmsan.git master 1e76a3e537c3 2e29b534 .config log report
ci-upstream-kmsan-gce 2019/10/02 18:04 https://github.com/google/kmsan.git master 1e76a3e537c3 2e29b534 .config log report
ci-upstream-kmsan-gce 2019/10/02 17:00 https://github.com/google/kmsan.git master 1e76a3e537c3 2e29b534 .config log report
ci-upstream-kmsan-gce 2019/10/02 05:00 https://github.com/google/kmsan.git master f5f9d3ce4686 b7a87a83 .config log report
ci-upstream-kmsan-gce 2019/10/02 03:29 https://github.com/google/kmsan.git master f5f9d3ce4686 b7a87a83 .config log report
ci-upstream-kmsan-gce 2019/10/02 02:55 https://github.com/google/kmsan.git master f5f9d3ce4686 b7a87a83 .config log report
ci-upstream-kmsan-gce 2019/09/30 14:02 https://github.com/google/kmsan.git master f5f9d3ce4686 c7a4fb99 .config log report
ci-upstream-kmsan-gce 2019/09/30 14:01 https://github.com/google/kmsan.git master f5f9d3ce4686 c7a4fb99 .config log report
ci-upstream-kmsan-gce 2019/09/29 13:33 https://github.com/google/kmsan.git master 124037e07586 c1ad5441 .config log report
ci-upstream-kmsan-gce 2019/09/29 05:26 https://github.com/google/kmsan.git master 124037e07586 eb6b9855 .config log report
ci-upstream-kmsan-gce 2019/09/29 03:40 https://github.com/google/kmsan.git master 124037e07586 eb6b9855 .config log report
ci-upstream-kmsan-gce 2019/09/27 08:10 https://github.com/google/kmsan.git master 2eb4eee5708b 2f1548bc .config log report
ci-upstream-kmsan-gce 2019/09/26 04:57 https://github.com/google/kmsan.git master cebbfdbcf2b7 24d405a3 .config log report
ci-upstream-kmsan-gce 2019/09/25 23:15 https://github.com/google/kmsan.git master cebbfdbcf2b7 a3355dba .config log report
ci-upstream-kmsan-gce 2019/09/06 21:33 https://github.com/google/kmsan.git master 014077b5cd62 a60cb4cd .config log report
ci-upstream-kmsan-gce 2019/06/27 20:09 https://github.com/google/kmsan.git master 41550654dedf 7509bf36 .config log report
ci-upstream-kmsan-gce 2019/06/09 22:01 https://github.com/google/kmsan.git master 62c1edc4b8ee 0159583c .config log report
ci-upstream-kmsan-gce 2019/06/05 18:49 https://github.com/google/kmsan.git master f75e4cfea97f bfb4a51e .config log report
ci-upstream-kmsan-gce 2019/06/04 07:39 https://github.com/google/kmsan.git master f75e4cfea97f ce07a7ae .config log report