tree 23effdb54146d20f7966ce3e73810525551d0e62
parent e70fb3eff0e2776c6bf9d9600f5868a548882ad8
author Pablo Neira Ayuso <pablo@netfilter.org> 1589458463 +0200
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1591165187 +0200

netfilter: nf_conntrack_pptp: prevent buffer overflows in debug code

commit 4c559f15efcc43b996f4da528cd7f9483aaca36d upstream.

Dan Carpenter says: "Smatch complains that the value for "cmd" comes
from the network and can't be trusted."

Add pptp_msg_name() helper function that checks for the array boundary.

Fixes: f09943fefe6b ("[NETFILTER]: nf_conntrack/nf_nat: add PPTP helper port")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>