# Re: \[PATCH\] net: usb: lan78xx: Fix lost EEPROM read timeout error(-ETIMEDOUT) in lan78xx\_read\_raw\_eeprom

- From: patchwork-bot+netdevbpf@kernel.org
- Date: 2025-10-03 18:00:22 
- List: netdev
- Page: https://ratatoskr.run/netdev/2025/10/3240129
- Thread: https://ratatoskr.run/netdev/2025/09/3236054/t.md

```text
Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski [ref]:

On Tue, 30 Sep 2025 14:19:02 +0530 you wrote:
> Syzbot reported read of uninitialized variable BUG with following call stack.
> 
> lan78xx 8-1:1.0 (unnamed net_device) (uninitialized): EEPROM read operation timeout
> =====================================================
> BUG: KMSAN: uninit-value in lan78xx_read_eeprom drivers/net/usb/lan78xx.c:1095 [inline]
> BUG: KMSAN: uninit-value in lan78xx_init_mac_address drivers/net/usb/lan78xx.c:1937 [inline]
> BUG: KMSAN: uninit-value in lan78xx_reset+0x999/0x2cd0 drivers/net/usb/lan78xx.c:3241
>  lan78xx_read_eeprom drivers/net/usb/lan78xx.c:1095 [inline]
>  lan78xx_init_mac_address drivers/net/usb/lan78xx.c:1937 [inline]
>  lan78xx_reset+0x999/0x2cd0 drivers/net/usb/lan78xx.c:3241
>  lan78xx_bind+0x711/0x1690 drivers/net/usb/lan78xx.c:3766
>  lan78xx_probe+0x225c/0x3310 drivers/net/usb/lan78xx.c:4707
> 
> [...]

Here is the summary with links:
  - net: usb: lan78xx: Fix lost EEPROM read timeout error(-ETIMEDOUT) in lan78xx_read_raw_eeprom
    https://git.kernel.org/netdev/net/c/49bdb63ff644

You are awesome, thank you!
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```