Hello, syzbot found the following issue on: HEAD commit: 81c325bbf94e kmsan: hooks: do not check memory in kmsan_in.. git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=14a07163b00000 kernel config: https://syzkaller.appspot.com/x/.config?x=2d8b9a11641dc9aa dashboard link: https://syzkaller.appspot.com/bug?extid=003c0a286b9af5412510 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=100165dbb00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=10c97e77b00000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+003c0a286b9af5412510@xxxxxxxxxxxxxxxxxxxxxxxxx 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?? ===================================================== BUG: KMSAN: kernel-usb-infoleak in usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430 usb_submit_urb+0x6c1/0x2aa0 drivers/usb/core/urb.c:430 usb_start_wait_urb+0x153/0x4b0 drivers/usb/core/message.c:58 usb_internal_control_msg drivers/usb/core/message.c:102 [inline] usb_control_msg+0x487/0x7c0 drivers/usb/core/message.c:153 __usbnet_write_cmd drivers/net/usb/usbnet.c:2050 [inline] usbnet_write_cmd+0x3d3/0x480 drivers/net/usb/usbnet.c:2088 mcs7830_set_reg drivers/net/usb/mcs7830.c:117 [inline] mcs7830_hif_set_mac_address drivers/net/usb/mcs7830.c:138 [inline] mcs7830_apply_base_config+0xd5/0x8a0 drivers/net/usb/mcs7830.c:387 mcs7830_bind+0x753/0xb70 drivers/net/usb/mcs7830.c:492 usbnet_probe+0x1284/0x4140 drivers/net/usb/usbnet.c:1747 usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396 really_probe+0x67d/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+0x2d6/0x3f0 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+0x1d3e/0x2400 drivers/base/core.c:3394 usb_set_configuration+0x37e9/0x3ed0 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+0x67d/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+0x2d6/0x3f0 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+0x1d3e/0x2400 drivers/base/core.c:3394 usb_new_device+0x1b8e/0x2950 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_event+0x5ad2/0x8910 drivers/usb/core/hub.c:5725 process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298 worker_thread+0x10bc/0x21f0 kernel/workqueue.c:2445 kthread+0x721/0x850 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 Uninit was stored to memory at: kmemdup+0x107/0x140 mm/util.c:130 __usbnet_write_cmd drivers/net/usb/usbnet.c:2039 [inline] usbnet_write_cmd+0x1a0/0x480 drivers/net/usb/usbnet.c:2088 mcs7830_set_reg drivers/net/usb/mcs7830.c:117 [inline] mcs7830_hif_set_mac_address drivers/net/usb/mcs7830.c:138 [inline] mcs7830_apply_base_config+0xd5/0x8a0 drivers/net/usb/mcs7830.c:387 mcs7830_bind+0x753/0xb70 drivers/net/usb/mcs7830.c:492 usbnet_probe+0x1284/0x4140 drivers/net/usb/usbnet.c:1747 usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396 really_probe+0x67d/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+0x2d6/0x3f0 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+0x1d3e/0x2400 drivers/base/core.c:3394 usb_set_configuration+0x37e9/0x3ed0 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+0x67d/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+0x2d6/0x3f0 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+0x1d3e/0x2400 drivers/base/core.c:3394 usb_new_device+0x1b8e/0x2950 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_event+0x5ad2/0x8910 drivers/usb/core/hub.c:5725 process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298 worker_thread+0x10bc/0x21f0 kernel/workqueue.c:2445 kthread+0x721/0x850 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 Uninit was stored to memory at: __dev_addr_set include/linux/netdevice.h:4655 [inline] eth_hw_addr_set include/linux/etherdevice.h:319 [inline] mcs7830_bind+0x230/0xb70 drivers/net/usb/mcs7830.c:488 usbnet_probe+0x1284/0x4140 drivers/net/usb/usbnet.c:1747 usb_probe_interface+0xf19/0x1600 drivers/usb/core/driver.c:396 really_probe+0x67d/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+0x2d6/0x3f0 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+0x1d3e/0x2400 drivers/base/core.c:3394 usb_set_configuration+0x37e9/0x3ed0 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+0x67d/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+0x2d6/0x3f0 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+0x1d3e/0x2400 drivers/base/core.c:3394 usb_new_device+0x1b8e/0x2950 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_event+0x5ad2/0x8910 drivers/usb/core/hub.c:5725 process_one_work+0xdb9/0x1820 kernel/workqueue.c:2298 worker_thread+0x10bc/0x21f0 kernel/workqueue.c:2445 kthread+0x721/0x850 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 Local variable addr created at: mcs7830_bind+0x9b/0xb70 drivers/net/usb/mcs7830.c:476 usbnet_probe+0x1284/0x4140 drivers/net/usb/usbnet.c:1747 Bytes 0-3 of 6 are uninitialized Memory access of size 6 starts at ffff88811d26f2b0 CPU: 1 PID: 19 Comm: kworker/1:0 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 ===================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
