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| author | Anant Thazhemadam <anant.thazhemadam@gmail.com> | 2020-10-11 23:00:30 +0530 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-10-18 12:57:30 -0700 |
| commit | 60f1626f0f866809de801724c3d180a9f322841e (patch) | |
| tree | 23cddf68a1ca7cc7d46ef51f572fc3e2696fb2be | |
| parent | 71a0e29e99405d89b695882d52eec60844173697 (diff) | |
| download | linux-60f1626f0f866809de801724c3d180a9f322841e.tar.bz2 | |
net: usb: rtl8150: don't incorrectly assign random MAC addresses
In set_ethernet_addr(), if get_registers() succeeds, the ethernet address
that was read must be copied over. Otherwise, a random ethernet address
must be assigned.
get_registers() returns 0 if successful, and negative error number
otherwise. However, in set_ethernet_addr(), this return value is
incorrectly checked.
Since this return value will never be equal to sizeof(node_id), a
random MAC address will always be generated and assigned to the
device; even in cases when get_registers() is successful.
Correctly modifying the condition that checks if get_registers() was
successful or not fixes this problem, and copies the ethernet address
appropriately.
Fixes: b2a0f274e3f7 ("net: rtl8150: Use the new usb control message API.")
Signed-off-by: Anant Thazhemadam <anant.thazhemadam@gmail.com>
Link: https://lore.kernel.org/r/20201011173030.141582-1-anant.thazhemadam@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | drivers/net/usb/rtl8150.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/usb/rtl8150.c b/drivers/net/usb/rtl8150.c index f020401adf04..bf8a60533f3e 100644 --- a/drivers/net/usb/rtl8150.c +++ b/drivers/net/usb/rtl8150.c @@ -261,7 +261,7 @@ static void set_ethernet_addr(rtl8150_t *dev) ret = get_registers(dev, IDR, sizeof(node_id), node_id); - if (ret == sizeof(node_id)) { + if (!ret) { ether_addr_copy(dev->netdev->dev_addr, node_id); } else { eth_hw_addr_random(dev->netdev); |