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UPSTREAM: wireguard: receive: remove dead code from default packet type case

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The situation in which we wind up hitting the default case here
indicates a major bug in earlier parsing code. It is not a usual thing
that should ever happen, which means a "friendly" message for it doesn't
make sense. Rather, replace this with a WARN_ON, just like we do earlier
in the file for a similar situation, so that somebody sends us a bug
report and we can fix it.

Reported-by: Fabian Freyer <fabianfreyer@radicallyopensecurity.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 2b8765c52db24c0fbcc81bac9b5e8390f2c7d3c8)
Bug: 152722841
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Idb4a4af58d16247c4d5dd32411e31076faa696bf
This commit is contained in:
Jason A. Donenfeld 2020-03-18 18:30:46 -06:00 • committed by Alexander Martinz
commit 9d444e6cdd
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1 changed files with 1 additions and 2 deletions
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3
drivers/net/wireguard/receive.c
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@ -587,8 +587,7 @@ void wg_packet_receive(struct wg_device *wg, struct sk_buff *skb)
wg_packet_consume_data(wg, skb);
break;
default:
net_dbg_skb_ratelimited("%s: Invalid packet from %pISpfsc\n",
wg->dev->name, skb);
WARN(1, "Non-exhaustive parsing of packet header lead to unknown packet type!\n");
goto err;
}
return;