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chelsio/chtls: fix a double free in chtls_setkey() 

The "skb" is freed by the transmit code in cxgb4_ofld_send() and we
shouldn't use it again.  But in the current code, if we hit an error
later on in the function then the clean up code will call kfree_skb(skb)
and so it causes a double free.

Set the "skb" to NULL and that makes the kfree_skb() a no-op.

Fixes: d25f2f71f6 ("crypto: chtls - Program the TLS session Key")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/X8ilb6PtBRLWiSHp@mwanda
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Dan Carpenter 2020-12-03 11:44:31 +03:00 committed by Jakub Kicinski
parent 832e09798c
commit 391119fb5c
1 changed files with 1 additions and 0 deletions
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1
drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_hw.c
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@ -391,6 +391,7 @@ int chtls_setkey(struct chtls_sock *csk, u32 keylen,
csk->wr_unacked += DIV_ROUND_UP(len, 16); csk->wr_unacked += DIV_ROUND_UP(len, 16);
enqueue_wr(csk, skb); enqueue_wr(csk, skb);
cxgb4_ofld_send(csk->egress_dev, skb); cxgb4_ofld_send(csk->egress_dev, skb);
skb = NULL;
chtls_set_scmd(csk); chtls_set_scmd(csk);
/* Clear quiesce for Rx key */ /* Clear quiesce for Rx key */