diff options
| author | Eric Dumazet <edumazet@google.com> | 2020-10-07 01:42:46 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-10-14 10:33:00 +0200 |
| commit | 1317469fa05bc01da2da7fb78da51a51ed7a8a86 (patch) | |
| tree | 363e276fccaae3217de7158dd7a1f684d967703e | |
| parent | 20f96fee81c632a8c5e9a0f055b0d5f26b62efef (diff) | |
macsec: avoid use-after-free in macsec_handle_frame()
commit c7cc9200e9b4a2ac172e990ef1975cd42975dad6 upstream.
De-referencing skb after call to gro_cells_receive() is not allowed.
We need to fetch skb->len earlier.
Fixes: 5491e7c6b1a9 ("macsec: enable GRO and RPS on macsec devices")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Paolo Abeni <pabeni@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/macsec.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c index 4c86a73db475..f233a6933a97 100644 --- a/drivers/net/macsec.c +++ b/drivers/net/macsec.c @@ -1080,6 +1080,7 @@ static rx_handler_result_t macsec_handle_frame(struct sk_buff **pskb) struct macsec_rx_sa *rx_sa; struct macsec_rxh_data *rxd; struct macsec_dev *macsec; + unsigned int len; sci_t sci; u32 pn; bool cbit; @@ -1236,9 +1237,10 @@ deliver: macsec_rxsc_put(rx_sc); skb_orphan(skb); + len = skb->len; ret = gro_cells_receive(&macsec->gro_cells, skb); if (ret == NET_RX_SUCCESS) - count_rx(dev, skb->len); + count_rx(dev, len); else macsec->secy.netdev->stats.rx_dropped++; |