On 2018-11-26 21:46, Sami Farin wrote:
4.18.20 works OK, but unfortunately 4.18 series is EOL.
I have Ryzen 1600X, 32 GB RAM, Fedora 28, gcc-8.2.1-5, nosmt=force,
igb module for Intel I211,
using XFS filesystems only.
To reproduce, I only do this: connect to VPN using a tunnel (e.g.
tun0),
start downloading a file with qbittorrent (allow port for incoming
TCP connections in qbittorrent and iptables) and wait a couple of
minutes.
I am also using ipset and connlimit modules.
I reproduced this bug three times.
With 4.18 I use fq+htb and with 4.19 I use CAKE for traffic control.
Only this message in kernel log:
[ 363.935074] TCP: request_sock_TCP: Possible SYN flooding on port
19044. Dropping request. Check SNMP counters.
I get this message with both 4.18.20 and 4.19.4.
RIP: 0010:rb_insert_color+0x64
Call Trace:
nf_conntrack_count [nf_conncount]
ip_set_test [ip_set]
connlimit_mt [xt_connlimit]
set_match_v4 [xt_set]
ipt_do_table [ip_tables]
ip_route_input_noref
nf_hook_slow
ip_local_deliver
inet_add_protocol
ip_rcv
ip_rcv_finish_core
__netif_receive_skb_one_core
netif_receive_skb_internal
tun_rx_batched
tun_get_user
__local_bh_enable_ip
tun_get_user
tun_chr_write_iter
__vfs_write
vfs_write
ksys_write
do_syscall_64
trace_hardirqs_off_thunk
entry_SYSCALL_64_after_hwframe
...
Kernel panic - not syncing: Fatal exception in interrupt
Check this patches:
https://patchwork.ozlabs.org/project/netfilter-devel/list/?series=73972&state=*
Relevant discussion:
https://marc.info/?l=linux-netdev&m=154211826106430&w=2
