https://github.com/torvalds/linux
Revision 1d9a7acd3d1e74c2d150d8934f7f55bed6d70858 authored by Florian Westphal on 06 January 2020, 22:34:17 UTC, committed by Pablo Neira Ayuso on 08 January 2020, 22:31:22 UTC
The timeout pointer can be NULL which means we should modify the
per-nets timeout instead.

All do this, except sctp and dccp which instead give:

general protection fault: 0000 [#1] PREEMPT SMP KASAN
net/netfilter/nf_conntrack_proto_dccp.c:682
 ctnl_timeout_parse_policy+0x150/0x1d0 net/netfilter/nfnetlink_cttimeout.c:67
 cttimeout_default_set+0x150/0x1c0 net/netfilter/nfnetlink_cttimeout.c:368
 nfnetlink_rcv_msg+0xcf2/0xfb0 net/netfilter/nfnetlink.c:229
 netlink_rcv_skb+0x177/0x450 net/netlink/af_netlink.c:2477

Reported-by: syzbot+46a4ad33f345d1dd346e@syzkaller.appspotmail.com
Fixes: c779e849608a8 ("netfilter: conntrack: remove get_timeout() indirection")
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
1 parent fb46f1b
History
Tip revision: 1d9a7acd3d1e74c2d150d8934f7f55bed6d70858 authored by Florian Westphal on 06 January 2020, 22:34:17 UTC
netfilter: conntrack: dccp, sctp: handle null timeout argument
Tip revision: 1d9a7ac
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