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net: qualcomm: rmnet: Fix rx_handler for non-linear skbs 

There is no guarantee that rmnet rx_handler is only fed with linear
skbs, but current rmnet implementation does not check that, leading
to crash in case of non linear skbs processed as linear ones.

Fix that by ensuring skb linearization before processing.

Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Acked-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Link: https://lore.kernel.org/r/1612428002-12333-2-git-send-email-loic.poulain@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
master
Loic Poulain 2021-02-04 09:40:01 +01:00 committed by Jakub Kicinski
parent a64566a22b
commit d698e6a00a
1 changed files with 5 additions and 0 deletions
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5
drivers/net/ethernet/qualcomm/rmnet/rmnet_handlers.c
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@ -183,6 +183,11 @@ rx_handler_result_t rmnet_rx_handler(struct sk_buff **pskb)
if (!skb)
goto done;
if (skb_linearize(skb)) {
kfree_skb(skb);
goto done;
}
if (skb->pkt_type == PACKET_LOOPBACK)
return RX_HANDLER_PASS;