tcp: tcp_v4_err() should be more careful
ICMP handlers are not very often stressed, we should
make them more resilient to bugs that might surface in
the future.
If there is no packet in retransmit queue, we should
avoid a NULL deref.
Signed-off-by: Eric Dumazet <edumazet at google.com>
Reported-by: soukjin bae <soukjin.bae at samsung.com>
Acked-by: Neal Cardwell <ncardwell at google.com>
Acked-by: Soheil Hassas Yeganeh <soheil at google.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
UnifiedSplitRaw
