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Revert "drivers/net/wan/hdlc_fr: Fix a double free in pvc_xmit"

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This reverts commit 1b479fb801
("drivers/net/wan/hdlc_fr: Fix a double free in pvc_xmit").

1. This commit is incorrect. "__skb_pad" will NOT free the skb on
failure when its "free_on_error" parameter is "false".

2. This commit claims to fix my commit. But it didn't CC me??

Fixes: 1b479fb801 ("drivers/net/wan/hdlc_fr: Fix a double free in pvc_xmit")
Cc: Lv Yunlong <lyl2019@mail.ustc.edu.cn>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Xie He 2021-05-02 20:51:36 -07:00 • committed by David S. Miller
parent d89ecd154c
commit d362fd0be4
1 changed files with 2 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

5
drivers/net/wan/hdlc_fr.c
View file

@ -415,7 +415,7 @@ static netdev_tx_t pvc_xmit(struct sk_buff *skb, struct net_device *dev)
if (pad > 0) { /* Pad the frame with zeros */ if (pad > 0) { /* Pad the frame with zeros */
if (__skb_pad(skb, pad, false)) if (__skb_pad(skb, pad, false))
goto out; goto drop;
skb_put(skb, pad); skb_put(skb, pad);
} }
} }
@ -448,9 +448,8 @@ static netdev_tx_t pvc_xmit(struct sk_buff *skb, struct net_device *dev)
return NETDEV_TX_OK; return NETDEV_TX_OK;
drop: drop:
kfree_skb(skb);
out:
dev->stats.tx_dropped++; dev->stats.tx_dropped++;
kfree_skb(skb);
return NETDEV_TX_OK; return NETDEV_TX_OK;
} }