Re: [PATCH net] net: usb: smsc95xx: Fix uninit-value access in smsc95xx_read_reg

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by David S. Miller <davem@xxxxxxxxxxxxx>:

On Sat, 21 Oct 2023 02:03:44 +0900 you wrote:
> syzbot reported the following uninit-value access issue [1]:
> 
> smsc95xx 1-1:0.0 (unnamed net_device) (uninitialized): Failed to read reg index 0x00000030: -32
> smsc95xx 1-1:0.0 (unnamed net_device) (uninitialized): Error reading E2P_CMD
> =====================================================
> BUG: KMSAN: uninit-value in smsc95xx_reset+0x409/0x25f0 drivers/net/usb/smsc95xx.c:896
>  smsc95xx_reset+0x409/0x25f0 drivers/net/usb/smsc95xx.c:896
>  smsc95xx_bind+0x9bc/0x22e0 drivers/net/usb/smsc95xx.c:1131
>  usbnet_probe+0x100b/0x4060 drivers/net/usb/usbnet.c:1750
>  usb_probe_interface+0xc75/0x1210 drivers/usb/core/driver.c:396
>  really_probe+0x506/0xf40 drivers/base/dd.c:658
>  __driver_probe_device+0x2a7/0x5d0 drivers/base/dd.c:800
>  driver_probe_device+0x72/0x7b0 drivers/base/dd.c:830
>  __device_attach_driver+0x55a/0x8f0 drivers/base/dd.c:958
>  bus_for_each_drv+0x3ff/0x620 drivers/base/bus.c:457
>  __device_attach+0x3bd/0x640 drivers/base/dd.c:1030
>  device_initial_probe+0x32/0x40 drivers/base/dd.c:1079
>  bus_probe_device+0x3d8/0x5a0 drivers/base/bus.c:532
>  device_add+0x16ae/0x1f20 drivers/base/core.c:3622
>  usb_set_configuration+0x31c9/0x38c0 drivers/usb/core/message.c:2207
>  usb_generic_driver_probe+0x109/0x2a0 drivers/usb/core/generic.c:238
>  usb_probe_device+0x290/0x4a0 drivers/usb/core/driver.c:293
>  really_probe+0x506/0xf40 drivers/base/dd.c:658
>  __driver_probe_device+0x2a7/0x5d0 drivers/base/dd.c:800
>  driver_probe_device+0x72/0x7b0 drivers/base/dd.c:830
>  __device_attach_driver+0x55a/0x8f0 drivers/base/dd.c:958
>  bus_for_each_drv+0x3ff/0x620 drivers/base/bus.c:457
>  __device_attach+0x3bd/0x640 drivers/base/dd.c:1030
>  device_initial_probe+0x32/0x40 drivers/base/dd.c:1079
>  bus_probe_device+0x3d8/0x5a0 drivers/base/bus.c:532
>  device_add+0x16ae/0x1f20 drivers/base/core.c:3622
>  usb_new_device+0x15f6/0x22f0 drivers/usb/core/hub.c:2589
>  hub_port_connect drivers/usb/core/hub.c:5440 [inline]
>  hub_port_connect_change drivers/usb/core/hub.c:5580 [inline]
>  port_event drivers/usb/core/hub.c:5740 [inline]
>  hub_event+0x53bc/0x7290 drivers/usb/core/hub.c:5822
>  process_one_work kernel/workqueue.c:2630 [inline]
>  process_scheduled_works+0x104e/0x1e70 kernel/workqueue.c:2703
>  worker_thread+0xf45/0x1490 kernel/workqueue.c:2784
>  kthread+0x3e8/0x540 kernel/kthread.c:388
>  ret_from_fork+0x66/0x80 arch/x86/kernel/process.c:147
>  ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304
> 
> [...]

Here is the summary with links:
  - [net] net: usb: smsc95xx: Fix uninit-value access in smsc95xx_read_reg
    https://git.kernel.org/netdev/net/c/51a32e828109

You are awesome, thank you!
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