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H A D | rtl8150.c | f45a4248 Mon Oct 05 08:29:58 CDT 2020 Anant Thazhemadam <anant.thazhemadam@gmail.com> net: usb: rtl8150: set random MAC address when set_ethernet_addr() fails
When get_registers() fails in set_ethernet_addr(),the uninitialized value of node_id gets copied over as the address. So, check the return value of get_registers().
If get_registers() executed successfully (i.e., it returns sizeof(node_id)), copy over the MAC address using ether_addr_copy() (instead of using memcpy()).
Else, if get_registers() failed instead, a randomly generated MAC address is set as the MAC address instead.
Reported-by: syzbot+abbc768b560c84d92fd3@syzkaller.appspotmail.com Tested-by: syzbot+abbc768b560c84d92fd3@syzkaller.appspotmail.com Acked-by: Petko Manolov <petkan@nucleusys.com> Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net> f45a4248 Mon Oct 05 08:29:58 CDT 2020 Anant Thazhemadam <anant.thazhemadam@gmail.com> net: usb: rtl8150: set random MAC address when set_ethernet_addr() fails When get_registers() fails in set_ethernet_addr(),the uninitialized value of node_id gets copied over as the address. So, check the return value of get_registers(). If get_registers() executed successfully (i.e., it returns sizeof(node_id)), copy over the MAC address using ether_addr_copy() (instead of using memcpy()). Else, if get_registers() failed instead, a randomly generated MAC address is set as the MAC address instead. Reported-by: syzbot+abbc768b560c84d92fd3@syzkaller.appspotmail.com Tested-by: syzbot+abbc768b560c84d92fd3@syzkaller.appspotmail.com Acked-by: Petko Manolov <petkan@nucleusys.com> Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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