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Commit 76cb5cc6 authored by Florian Westphal's avatar Florian Westphal Committed by Greg Kroah-Hartman
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netfilter: conntrack: dccp: treat SYNC/SYNCACK as invalid if no prior state


commit 6613b6173dee098997229caf1f3b961c49da75e6 upstream.

When first DCCP packet is SYNC or SYNCACK, we insert a new conntrack
that has an un-initialized timeout value, i.e. such entry could be
reaped at any time.

Mark them as INVALID and only ignore SYNC/SYNCACK when connection had
an old state.

Reported-by: default avatar <syzbot+6f18401420df260e37ed@syzkaller.appspotmail.com>
Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
Signed-off-by: default avatarPablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 3e6170d0
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