[syzbot] KMSAN: uninit-value in ax88772a_hw_reset

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 412af9cd936d ioremap.c: move an #include around
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=136fb126b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=2d142cdf4204061
dashboard link: https://syzkaller.appspot.com/bug?extid=8d179821571093c5f928
compiler: clang version 14.0.0 (g...@github.com:llvm/llvm-project.git 0996585c8e3b3d409494eb5f1cad714b9e1f7fb5), GNU ld (GNU Binutils for Debian) 2.35.2

Unfortunately, I don't have any reproducer for this issue yet.

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8d1798...@syzkaller.appspotmail.com

asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0016: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable hardware MII access
=====================================================
BUG: KMSAN: uninit-value in ax88772a_hw_reset+0xc2a/0x12c0 drivers/net/usb/asix_devices.c:523
ax88772a_hw_reset+0xc2a/0x12c0 drivers/net/usb/asix_devices.c:523
ax88772_bind+0x838/0x19b0 drivers/net/usb/asix_devices.c:762
usbnet_probe+0x1285/0x40c0 drivers/net/usb/usbnet.c:1745
usb_probe_interface+0xf15/0x1530 drivers/usb/core/driver.c:396
really_probe+0x66e/0x1510 drivers/base/dd.c:596
__driver_probe_device+0x3e9/0x530 drivers/base/dd.c:751
driver_probe_device drivers/base/dd.c:781 [inline]
__device_attach_driver+0x79f/0x1120 drivers/base/dd.c:898
bus_for_each_drv+0x2f0/0x410 drivers/base/bus.c:427
__device_attach+0x593/0x8e0 drivers/base/dd.c:969
device_initial_probe+0x4a/0x60 drivers/base/dd.c:1016
bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487
device_add+0x1d46/0x2400 drivers/base/core.c:3396
usb_set_configuration+0x389f/0x3ee0 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x13c/0x300 drivers/usb/core/generic.c:238
usb_probe_device+0x309/0x570 drivers/usb/core/driver.c:293
really_probe+0x66e/0x1510 drivers/base/dd.c:596
__driver_probe_device+0x3e9/0x530 drivers/base/dd.c:751
driver_probe_device drivers/base/dd.c:781 [inline]
__device_attach_driver+0x79f/0x1120 drivers/base/dd.c:898
bus_for_each_drv+0x2f0/0x410 drivers/base/bus.c:427
__device_attach+0x593/0x8e0 drivers/base/dd.c:969
device_initial_probe+0x4a/0x60 drivers/base/dd.c:1016
bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487
device_add+0x1d46/0x2400 drivers/base/core.c:3396
usb_new_device+0x1b9a/0x2960 drivers/usb/core/hub.c:2563
hub_port_connect drivers/usb/core/hub.c:5348 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5488 [inline]
port_event drivers/usb/core/hub.c:5634 [inline]
hub_event+0x57cf/0x8690 drivers/usb/core/hub.c:5716
process_one_work+0xdc7/0x1760 kernel/workqueue.c:2297
worker_thread+0x1101/0x22b0 kernel/workqueue.c:2444
kthread+0x66b/0x780 kernel/kthread.c:319
ret_from_fork+0x1f/0x30

Local variable smsr.i created at:
asix_mdio_read_nopm+0xb7/0xab0 drivers/net/usb/asix_common.c:574
ax88772a_hw_reset+0x822/0x12c0 drivers/net/usb/asix_devices.c:511
=====================================================
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0014: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable hardware MII access
=====================================================
BUG: KMSAN: uninit-value in ax88772a_hw_reset+0xc37/0x12c0 drivers/net/usb/asix_devices.c:527
ax88772a_hw_reset+0xc37/0x12c0 drivers/net/usb/asix_devices.c:527
ax88772_bind+0x838/0x19b0 drivers/net/usb/asix_devices.c:762
usbnet_probe+0x1285/0x40c0 drivers/net/usb/usbnet.c:1745
usb_probe_interface+0xf15/0x1530 drivers/usb/core/driver.c:396
really_probe+0x66e/0x1510 drivers/base/dd.c:596
__driver_probe_device+0x3e9/0x530 drivers/base/dd.c:751
driver_probe_device drivers/base/dd.c:781 [inline]
__device_attach_driver+0x79f/0x1120 drivers/base/dd.c:898
bus_for_each_drv+0x2f0/0x410 drivers/base/bus.c:427
__device_attach+0x593/0x8e0 drivers/base/dd.c:969
device_initial_probe+0x4a/0x60 drivers/base/dd.c:1016
bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487
device_add+0x1d46/0x2400 drivers/base/core.c:3396
usb_set_configuration+0x389f/0x3ee0 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x13c/0x300 drivers/usb/core/generic.c:238
usb_probe_device+0x309/0x570 drivers/usb/core/driver.c:293
really_probe+0x66e/0x1510 drivers/base/dd.c:596
__driver_probe_device+0x3e9/0x530 drivers/base/dd.c:751
driver_probe_device drivers/base/dd.c:781 [inline]
__device_attach_driver+0x79f/0x1120 drivers/base/dd.c:898
bus_for_each_drv+0x2f0/0x410 drivers/base/bus.c:427
__device_attach+0x593/0x8e0 drivers/base/dd.c:969
device_initial_probe+0x4a/0x60 drivers/base/dd.c:1016
bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487
device_add+0x1d46/0x2400 drivers/base/core.c:3396
usb_new_device+0x1b9a/0x2960 drivers/usb/core/hub.c:2563
hub_port_connect drivers/usb/core/hub.c:5348 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5488 [inline]
port_event drivers/usb/core/hub.c:5634 [inline]
hub_event+0x57cf/0x8690 drivers/usb/core/hub.c:5716
process_one_work+0xdc7/0x1760 kernel/workqueue.c:2297
worker_thread+0x1101/0x22b0 kernel/workqueue.c:2444
kthread+0x66b/0x780 kernel/kthread.c:319
ret_from_fork+0x1f/0x30

Local variable smsr.i created at:
asix_mdio_read_nopm+0xb7/0xab0 drivers/net/usb/asix_common.c:574
ax88772a_hw_reset+0x8af/0x12c0 drivers/net/usb/asix_devices.c:513
=====================================================
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access


---
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[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: b0a8b5053e8b kmsan: core: add dependency on DEBUG_KERNEL

git tree: https://github.com/google/kmsan.git master

console output: https://syzkaller.appspot.com/x/log.txt?x=14ad9c43b00000
kernel config: https://syzkaller.appspot.com/x/.config?x=46a956fc7a887c60
dashboard link: https://syzkaller.appspot.com/bug?extid=8d179821571093c5f928
compiler: clang version 14.0.0 (/usr/local/google/src/llvm-git-monorepo 2b554920f11c8b763cd9ed9003f4e19b919b8e1f), GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=101553cbb00000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10187949b00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8d1798...@syzkaller.appspotmail.com

asix 1-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0016: -71
asix 1-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
asix 1-1:0.0 (unnamed net_device) (uninitialized): Failed to enable hardware MII access
=====================================================
BUG: KMSAN: uninit-value in ax88772a_hw_reset+0xc55/0x12e0 drivers/net/usb/asix_devices.c:523 drivers/net/usb/asix_devices.c:523
ax88772a_hw_reset+0xc55/0x12e0 drivers/net/usb/asix_devices.c:523 drivers/net/usb/asix_devices.c:523
ax88772_bind+0x750/0x1770 drivers/net/usb/asix_devices.c:762 drivers/net/usb/asix_devices.c:762
usbnet_probe+0x1284/0x4140 drivers/net/usb/usbnet.c:1747 drivers/net/usb/usbnet.c:1747
usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396 drivers/usb/core/driver.c:396
really_probe+0x67d/0x1510 drivers/base/dd.c:596 drivers/base/dd.c:596
__driver_probe_device+0x3e9/0x530 drivers/base/dd.c:751 drivers/base/dd.c:751
driver_probe_device drivers/base/dd.c:781 [inline]
driver_probe_device drivers/base/dd.c:781 [inline] drivers/base/dd.c:898
__device_attach_driver+0x79f/0x1120 drivers/base/dd.c:898 drivers/base/dd.c:898
bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427 drivers/base/bus.c:427
__device_attach+0x593/0x8e0 drivers/base/dd.c:969 drivers/base/dd.c:969
device_initial_probe+0x4a/0x60 drivers/base/dd.c:1016 drivers/base/dd.c:1016
bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487 drivers/base/bus.c:487
device_add+0x1d3e/0x2400 drivers/base/core.c:3394 drivers/base/core.c:3394
usb_set_configuration+0x37e9/0x3ed0 drivers/usb/core/message.c:2170 drivers/usb/core/message.c:2170
usb_generic_driver_probe+0x13c/0x300 drivers/usb/core/generic.c:238 drivers/usb/core/generic.c:238
usb_probe_device+0x309/0x570 drivers/usb/core/driver.c:293 drivers/usb/core/driver.c:293
really_probe+0x67d/0x1510 drivers/base/dd.c:596 drivers/base/dd.c:596
__driver_probe_device+0x3e9/0x530 drivers/base/dd.c:751 drivers/base/dd.c:751
driver_probe_device drivers/base/dd.c:781 [inline]
driver_probe_device drivers/base/dd.c:781 [inline] drivers/base/dd.c:898
__device_attach_driver+0x79f/0x1120 drivers/base/dd.c:898 drivers/base/dd.c:898
bus_for_each_drv+0x2d6/0x3f0 drivers/base/bus.c:427 drivers/base/bus.c:427
__device_attach+0x593/0x8e0 drivers/base/dd.c:969 drivers/base/dd.c:969
device_initial_probe+0x4a/0x60 drivers/base/dd.c:1016 drivers/base/dd.c:1016
bus_probe_device+0x17b/0x3e0 drivers/base/bus.c:487 drivers/base/bus.c:487
device_add+0x1d3e/0x2400 drivers/base/core.c:3394 drivers/base/core.c:3394
usb_new_device+0x1b8e/0x2950 drivers/usb/core/hub.c:2563 drivers/usb/core/hub.c:2563
hub_port_connect drivers/usb/core/hub.c:5353 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5497 [inline]
port_event drivers/usb/core/hub.c:5643 [inline]
hub_port_connect drivers/usb/core/hub.c:5353 [inline] drivers/usb/core/hub.c:5725
hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] drivers/usb/core/hub.c:5725
port_event drivers/usb/core/hub.c:5643 [inline] drivers/usb/core/hub.c:5725
hub_event+0x5ad2/0x8910 drivers/usb/core/hub.c:5725 drivers/usb/core/hub.c:5725
process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298 kernel/workqueue.c:2298
worker_thread+0x10bc/0x21f0 kernel/workqueue.c:2445 kernel/workqueue.c:2445
kthread+0x721/0x850 kernel/kthread.c:327 kernel/kthread.c:327

ret_from_fork+0x1f/0x30

Local variable smsr.i created at:

asix_mdio_read_nopm+0xb9/0xa50 drivers/net/usb/asix_common.c:574 drivers/net/usb/asix_common.c:574
ax88772a_hw_reset+0x83c/0x12e0 drivers/net/usb/asix_devices.c:511 drivers/net/usb/asix_devices.c:511

CPU: 1 PID: 115 Comm: kworker/1:2 Not tainted 5.16.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: usb_hub_wq hub_event
=====================================================

[Pavel Skripkin]

On 11/22/21 18:12, syzbot wrote:
> Hello,
>
> syzbot found the following issue on:
>
> HEAD commit: 412af9cd936d ioremap.c: move an #include around
> git tree: https://github.com/google/kmsan.git master
> console output: https://syzkaller.appspot.com/x/log.txt?x=136fb126b00000
> kernel config: https://syzkaller.appspot.com/x/.config?x=2d142cdf4204061
> dashboard link: https://syzkaller.appspot.com/bug?extid=8d179821571093c5f928
> compiler: clang version 14.0.0 (g...@github.com:llvm/llvm-project.git 0996585c8e3b3d409494eb5f1cad714b9e1f7fb5), GNU ld (GNU Binutils for Debian) 2.35.2
>
> Unfortunately, I don't have any reproducer for this issue yet.
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+8d1798...@syzkaller.appspotmail.com
>
> asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable software MII access
> asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71
> asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x0016: -71
> asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to write reg index 0x0000: -71
> asix 4-1:0.0 (unnamed net_device) (uninitialized): Failed to enable hardware MII access

#syz fix: asix: fix uninit-value in asix_mdio_read()


With regards,
Pavel Skripkin