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usb: aqc111: stop lying about skb->truesize

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[ Upstream commit 9aad6e45c4 ]

Some usb drivers try to set small skb->truesize and break
core networking stacks.

I replace one skb_clone() by an allocation of a fresh
and small skb, to get minimally sized skbs, like we did
in commit 1e2c611723 ("net: cdc_ncm: reduce skb truesize
in rx path") and 4ce62d5b2f ("net: usb: ax88179_178a:
stop lying about skb->truesize")

Fixes: 361459cd96 ("net: usb: aqc111: Implement RX data path")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20240506135546.3641185-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eric Dumazet 2024-05-06 13:55:46 +00:00 committed by Greg Kroah-Hartman
parent 4cff6817ee
commit 2093cc6e87
1 changed files with 3 additions and 5 deletions
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8
drivers/net/usb/aqc111.c
View file

@ -1141,17 +1141,15 @@ static int aqc111_rx_fixup(struct usbnet *dev, struct sk_buff *skb)
continue;
}
/* Clone SKB */
new_skb = skb_clone(skb, GFP_ATOMIC);
new_skb = netdev_alloc_skb_ip_align(dev->net, pkt_len);
if (!new_skb)
goto err;
new_skb->len = pkt_len;
skb_put(new_skb, pkt_len);
memcpy(new_skb->data, skb->data, pkt_len);
skb_pull(new_skb, AQ_RX_HW_PAD);
skb_set_tail_pointer(new_skb, new_skb->len);
new_skb->truesize = SKB_TRUESIZE(new_skb->len);
if (aqc111_data->rx_checksum)
aqc111_rx_checksum(new_skb, pkt_desc);