diff mbox series

[5.12,130/677] Revert "drivers/net/wan/hdlc_fr: Fix a double free in pvc_xmit"

Message ID 20210512144841.543141879@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH May 12, 2021, 2:42 p.m. UTC 
From: Xie He <xie.he.0141@gmail.com>

commit d362fd0be456dba2d3d58a90b7a193962776562b upstream.

This reverts commit 1b479fb80160
("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: 1b479fb80160 ("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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/net/wan/hdlc_fr.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
diff mbox series

Patch

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