[Linux-kernel-mentees] [PATCH v2] net: usb: rtl8150: prevent set_ethernet_addr from setting uninit address

David Miller davem at davemloft.net
Fri Oct 2 02:15:22 UTC 2020

From: Anant Thazhemadam <anant.thazhemadam at gmail.com>
Date: Thu,  1 Oct 2020 13:02:20 +0530

> When get_registers() fails (which happens when usb_control_msg() fails)
> in set_ethernet_addr(), the uninitialized value of node_id gets copied
> as the address.
> Checking for the return values appropriately, and handling the case
> wherein set_ethernet_addr() fails like this, helps in avoiding the
> mac address being incorrectly set in this manner.
> Reported-by: syzbot+abbc768b560c84d92fd3 at syzkaller.appspotmail.com
> Tested-by: syzbot+abbc768b560c84d92fd3 at syzkaller.appspotmail.com
> Signed-off-by: Anant Thazhemadam <anant.thazhemadam at gmail.com>
> Acked-by: Petko Manolov <petkan at nucleusys.com>

First, please remove "Linux-kernel-mentees" from the Subject line.

All patch submitters should have their work judged equally, whoever
they are.  So this Subject text gives no extra information, and it
simply makes scanning Subject lines in one's mailer more difficult.

Second, when a MAC address fails to probe a random MAC address should
be selected.  We have helpers for this.  This way an interface still
comes up and is usable, even in the event of a failed MAC address

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