From: Eric Dumazet <edumazet@xxxxxxxxxx> [ Upstream commit 47240ba0cd09bb6fe6db9889582048324999dfa4 ] If skb_linearize() fails, we need to free the skb. TSO makes skb bigger, and this bug might be the reason Raspberry Pi 3B+ users had to disable TSO. Fixes: 55d7de9de6c3 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver") Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx> Reported-by: RENARD Pierre-Francois <pfrenard@xxxxxxxxx> Cc: Stefan Wahren <stefan.wahren@xxxxxxxx> Cc: Woojung Huh <woojung.huh@xxxxxxxxxxxxx> Cc: Microchip Linux Driver Support <UNGLinuxDriver@xxxxxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/usb/lan78xx.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -2604,11 +2604,6 @@ static int lan78xx_stop(struct net_devic return 0; } -static int lan78xx_linearize(struct sk_buff *skb) -{ - return skb_linearize(skb); -} - static struct sk_buff *lan78xx_tx_prep(struct lan78xx_net *dev, struct sk_buff *skb, gfp_t flags) { @@ -2619,8 +2614,10 @@ static struct sk_buff *lan78xx_tx_prep(s return NULL; } - if (lan78xx_linearize(skb) < 0) + if (skb_linearize(skb)) { + dev_kfree_skb_any(skb); return NULL; + } tx_cmd_a = (u32)(skb->len & TX_CMD_A_LEN_MASK_) | TX_CMD_A_FCS_;