Subject: Re: [PATCH v4] lan743x: fix for potential NULL pointer dereference with bare card

From: [email-masked]
Date: Tue, 15 Dec 2020 23:39:14 +0000

Hello:

This patch was applied to bpf/bpf.git (refs/heads/master):

On Tue, 15 Dec 2020 19:12:45 +0300 you wrote:
> This is the 4th revision of the patch fix for potential null pointer dereference
> with lan743x card.
> 
> The simpliest way to reproduce: boot with bare lan743x and issue "ethtool ethN"
> command where ethN is the interface with lan743x card. Example:
> 
> $ sudo ethtool eth7
> dmesg:
> [  103.510336] BUG: kernel NULL pointer dereference, address: 0000000000000340
> ...
> [  103.510836] RIP: 0010:phy_ethtool_get_wol+0x5/0x30 [libphy]
> ...
> [  103.511629] Call Trace:
> [  103.511666]  lan743x_ethtool_get_wol+0x21/0x40 [lan743x]
> [  103.511724]  dev_ethtool+0x1507/0x29d0
> [  103.511769]  ? avc_has_extended_perms+0x17f/0x440
> [  103.511820]  ? tomoyo_init_request_info+0x84/0x90
> [  103.511870]  ? tomoyo_path_number_perm+0x68/0x1e0
> [  103.511919]  ? tty_insert_flip_string_fixed_flag+0x82/0xe0
> [  103.511973]  ? inet_ioctl+0x187/0x1d0
> [  103.512016]  dev_ioctl+0xb5/0x560
> [  103.512055]  sock_do_ioctl+0xa0/0x140
> [  103.512098]  sock_ioctl+0x2cb/0x3c0
> [  103.512139]  __x64_sys_ioctl+0x84/0xc0
> [  103.512183]  do_syscall_64+0x33/0x80
> [  103.512224]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
> [  103.512274] RIP: 0033:0x7f54a9cba427
> ...
> 
> [...]

Here is the summary with links:
  - [v4] lan743x: fix for potential NULL pointer dereference with bare card
    https://git.kernel.org/bpf/bpf/c/e9e13b6adc33

You are awesome, thank you!
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