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mlxsw: spectrum: Fix memory leak at skb reallocation

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[ Upstream commit 36bf38d158 ]

During transmission the skb is checked for headroom in order to
add vendor specific header. In case the skb needs to be re-allocated,
skb_realloc_headroom() is called to make a private copy of the original,
but doesn't release it. Current code assumes that the original skb is
released during reallocation and only releases it at the error path
which causes a memory leak.

Fix this by adding the original skb release to the main path.

Fixes: 56ade8fe3f ("mlxsw: spectrum: Add initial support for Spectrum ASIC")
Signed-off-by: Arkadi Sharshevsky <arkadis@mellanox.com>
Reviewed-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Arkadi Sharshevsky
2017-01-12 09:10:37 +01:00
committed by Greg Kroah-Hartman
parent 5b3df44010
commit 7c249f3306
1 changed files with 1 additions and 0 deletions
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1
drivers/net/ethernet/mellanox/mlxsw/spectrum.c
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@@ -684,6 +684,7 @@ static netdev_tx_t mlxsw_sp_port_xmit(struct sk_buff *skb,
dev_kfree_skb_any(skb_orig);
return NETDEV_TX_OK;
}
dev_consume_skb_any(skb_orig);
}
if (eth_skb_pad(skb)) {