====================================================== WARNING: possible circular locking dependency detected syz-executor4 uses obsolete (PF_INET,SOCK_PACKET) 4.16.0-rc2+ #323 Not tainted ------------------------------------------------------ syz-executor6/5880 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<0000000048379e51>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000048379e51>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000003c4a0a2a>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (rtnl_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 unregister_netdevice_notifier+0x91/0x4e0 net/core/dev.c:1673 tee_tg_destroy+0x61/0xc0 net/netfilter/xt_TEE.c:123 cleanup_entry+0x242/0x380 net/ipv6/netfilter/ip6_tables.c:673 __do_replace+0x7ac/0xa70 net/ipv6/netfilter/ip6_tables.c:1108 do_replace net/ipv6/netfilter/ip6_tables.c:1164 [inline] do_ip6t_set_ctl+0x40f/0x5f0 net/ipv6/netfilter/ip6_tables.c:1686 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x10b/0x130 net/ipv6/ipv6_sockglue.c:927 dccp_setsockopt+0x85/0xd0 net/dccp/proto.c:576 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #1 (&xt[i].mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1046 xt_request_find_table_lock+0x28/0xc0 net/netfilter/x_tables.c:1093 get_info+0x154/0x690 net/ipv6/netfilter/ip6_tables.c:989 do_arpt_get_ctl+0x2a9/0xa00 net/ipv4/netfilter/arp_tables.c:1481 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122 ip_getsockopt+0x15c/0x220 net/ipv4/ip_sockglue.c:1571 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2934 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #0 (sk_lock-AF_INET){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 lock_sock_nested+0xc2/0x110 net/core/sock.c:2777 lock_sock include/net/sock.h:1463 [inline] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1560 udp_getsockopt+0x45/0x80 net/ipv4/udp.c:2478 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2934 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 other info that might help us debug this: Chain exists of: sk_lock-AF_INET --> &xt[i].mutex --> rtnl_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(&xt[i].mutex); lock(rtnl_mutex); lock(sk_lock-AF_INET); *** DEADLOCK *** 1 lock held by syz-executor6/5880: #0: (rtnl_mutex){+.+.}, at: [<000000003c4a0a2a>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5880 Comm: syz-executor6 Not tainted 4.16.0-rc2+ #323 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_circular_bug.isra.38+0x2cd/0x2dc kernel/locking/lockdep.c:1223 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2417 [inline] __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3431 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 lock_sock_nested+0xc2/0x110 net/core/sock.c:2777 lock_sock include/net/sock.h:1463 [inline] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1560 udp_getsockopt+0x45/0x80 net/ipv4/udp.c:2478 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2934 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453da9 RSP: 002b:00007f3f9cbfdc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007f3f9cbfe6d4 RCX: 0000000000453da9 RDX: 0000000000000030 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000020007ffd R09: 0000000000000000 R10: 0000000020008000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000f2 R14: 00000000006f1750 R15: 0000000000000000 kauditd_printk_skb: 20 callbacks suppressed audit: type=1400 audit(1519217108.306:42): avc: denied { create } for pid=5949 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(1519217108.307:43): avc: denied { map } for pid=5949 comm="syz-executor0" path="socket:[16723]" dev="sockfs" ino=16723 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(1519217108.307:44): avc: denied { read accept } for pid=5949 comm="syz-executor0" path="socket:[16723]" dev="sockfs" ino=16723 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(1519217108.309:45): avc: denied { bind } for pid=5949 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(1519217108.309:46): avc: denied { getopt } for pid=5949 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(1519217108.366:47): avc: denied { write } for pid=5964 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 audit: type=1400 audit(1519217108.366:48): avc: denied { ioctl } for pid=5964 comm="syz-executor7" path="socket:[16752]" dev="sockfs" ino=16752 ioctlcmd=0x8903 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 TCP: request_sock_TCPv6: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. mmap: syz-executor4 (6058) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. QAT: Invalid ioctl QAT: Invalid ioctl sit0: Invalid MTU -2147483648 requested, hw min 1280 Trying to set illegal importance in message sit0: Invalid MTU -2147483648 requested, hw min 1280 binder: 6164:6172 Acquire 1 refcount change on invalid ref 0 ret -22 Trying to set illegal importance in message binder: 6164:6172 Release 1 refcount change on invalid ref 1 ret -22 binder: 6164:6191 Acquire 1 refcount change on invalid ref 0 ret -22 xt_CT: netfilter: NOTRACK target is deprecated, use CT instead or upgrade iptables audit: type=1400 audit(1519217109.685:49): avc: denied { setgid } for pid=6231 comm="syz-executor1" capability=6 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519217109.742:51): avc: denied { name_bind } for pid=6259 comm="syz-executor7" src=20030 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 kernel msg: ebtables bug: please report to author: Valid hook without chain audit: type=1400 audit(1519217109.742:50): avc: denied { bind } for pid=6255 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 kernel msg: ebtables bug: please report to author: Valid hook without chain ALSA: seq fatal error: cannot create timer (-22) ALSA: seq fatal error: cannot create timer (-22) netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. device eql entered promiscuous mode CUSE: info not properly terminated QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl binder: 6739:6746 ioctl c0306201 20008000 returned -14 binder: 6739:6753 ioctl c0306201 20008000 returned -14 Cannot find add_set index 0 as target xt_connbytes: Forcing CT accounting to be enabled binder: BINDER_SET_CONTEXT_MGR already set binder: 6876:6888 ioctl 40046207 0 returned -16 device eql entered promiscuous mode x_tables: ip_tables: icmp match: only valid for protocol 1 binder: 7055:7063 unknown command 0 device eql entered promiscuous mode binder: 7055:7063 ioctl c0306201 2000a000 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 7055:7074 unknown command 0 binder_alloc: 7055: binder_alloc_buf, no vma binder: 7055:7086 transaction failed 29189/-3, size 56-8 line 2957 binder: 7055:7074 ioctl c0306201 2000a000 returned -22 binder: 7055:7063 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 7055:7074 transaction 9 out, still active binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 9, target dead QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. do_dccp_setsockopt: sockopt(CHANGE_L/R) is deprecated: fix your app netlink: 8 bytes leftover after parsing attributes in process `syz-executor3'. 9pnet_virtio: no channels available for device ./control 9pnet_virtio: no channels available for device ./control x_tables: ip6_tables: TCPOPTSTRIP target: only valid in mangle table, not raw x_tables: ip6_tables: TCPOPTSTRIP target: only valid in mangle table, not raw netlink: 'syz-executor7': attribute type 1 has an invalid length. netlink: 'syz-executor7': attribute type 1 has an invalid length. kauditd_printk_skb: 13 callbacks suppressed audit: type=1400 audit(1519217113.562:65): avc: denied { setuid } for pid=7284 comm="syz-executor5" capability=7 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 audit: type=1400 audit(1519217113.647:66): avc: denied { relabelto } for pid=7297 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:wtmp_t:s0 tclass=packet permissive=1 kernel msg: ebtables bug: please report to author: Couldn't copy entries from userspace audit: type=1400 audit(1519217113.672:67): avc: denied { send } for pid=7297 comm="syz-executor4" saddr=172.20.4.14 src=45630 daddr=172.20.4.187 netif=lo scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:wtmp_t:s0 tclass=packet permissive=1 audit: type=1400 audit(1519217113.672:68): avc: denied { send } for pid=7297 comm="syz-executor4" saddr=172.20.4.187 daddr=172.20.4.14 dest=45630 netif=lo scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:wtmp_t:s0 tclass=packet permissive=1 audit: type=1400 audit(1519217113.673:69): avc: denied { recv } for pid=7297 comm="syz-executor4" saddr=172.20.4.187 daddr=172.20.4.14 dest=45630 netif=lo scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:wtmp_t:s0 tclass=packet permissive=1 kernel msg: ebtables bug: please report to author: Couldn't copy entries from userspace SELinux: unrecognized netlink message: protocol=0 nlmsg_type=32802 sclass=netlink_route_socket pig=7382 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=32802 sclass=netlink_route_socket pig=7392 comm=syz-executor0 device eql entered promiscuous mode audit: type=1400 audit(1519217114.611:70): avc: denied { create } for pid=7470 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_crypto_socket permissive=1 audit: type=1400 audit(1519217114.668:71): avc: denied { attach_queue } for pid=7486 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=tun_socket permissive=1 ion_ioctl: ioctl validate failed syz-executor1: vmalloc: allocation failure: 9782040236 bytes, mode:0x14080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null) syz-executor1 cpuset=/ mems_allowed=0 CPU: 1 PID: 7659 Comm: syz-executor1 Not tainted 4.16.0-rc2+ #323 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 warn_alloc+0x19a/0x2b0 mm/page_alloc.c:3306 __vmalloc_node_range+0x4f0/0x650 mm/vmalloc.c:1775 __vmalloc_node mm/vmalloc.c:1804 [inline] __vmalloc_node_flags_caller+0x50/0x60 mm/vmalloc.c:1826 kvmalloc_node+0x82/0xd0 mm/util.c:428 kvmalloc include/linux/mm.h:541 [inline] kvmalloc_array include/linux/mm.h:557 [inline] xt_alloc_entry_offsets+0x21/0x30 net/netfilter/x_tables.c:779 translate_table+0x2e0/0x1dd0 net/ipv4/netfilter/arp_tables.c:533 do_replace net/ipv4/netfilter/arp_tables.c:981 [inline] do_arpt_set_ctl+0x394/0x8d0 net/ipv4/netfilter/arp_tables.c:1458 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0x97/0xa0 net/ipv4/ip_sockglue.c:1259 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2905 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453da9 RSP: 002b:00007f322a30dc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f322a30e6d4 RCX: 0000000000453da9 RDX: 0000000000000060 RSI: 0000000000000000 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000000000420 R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004d3 R14: 00000000006f7468 R15: 0000000000000000 Mem-Info: active_anon:106512 inactive_anon:65 isolated_anon:0 active_file:3524 inactive_file:8432 isolated_file:0 unevictable:0 dirty:202 writeback:0 unstable:0 slab_reclaimable:8941 slab_unreclaimable:89040 mapped:24345 shmem:72 pagetables:761 bounce:0 free:1383701 free_pcp:480 free_cma:0 Node 0 active_anon:426048kB inactive_anon:260kB active_file:14096kB inactive_file:33728kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:97380kB dirty:808kB writeback:0kB shmem:288kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 167936kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no Node 0 DMA free:15908kB min:164kB low:204kB high:244kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 2868 6378 6378 Node 0 DMA32 free:2939112kB min:30316kB low:37892kB high:45468kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:3129292kB managed:2939944kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:832kB local_pcp:664kB free_cma:0kB lowmem_reserve[]: 0 0 3510 3510 Node 0 Normal free:2579816kB min:37100kB low:46372kB high:55644kB active_anon:426040kB inactive_anon:252kB active_file:14096kB inactive_file:33736kB unevictable:0kB writepending:812kB present:4718592kB managed:3594328kB mlocked:0kB kernel_stack:3904kB pagetables:3028kB bounce:0kB free_pcp:1068kB local_pcp:372kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB Node 0 DMA32: 4*4kB (M) 3*8kB (UM) 4*16kB (UM) 4*32kB (M) 4*64kB (UM) 2*128kB (M) 2*256kB (UM) 4*512kB (UM) 3*1024kB (UM) 2*2048kB (UM) 715*4096kB (M) = 2939112kB Node 0 Normal: 84*4kB (UM) 95*8kB (UM) 1073*16kB (UME) 577*32kB (UME) 114*64kB (UM) 4*128kB (M) 33*256kB (UME) 19*512kB (UME) 6*1024kB (UM) 4*2048kB (UM) 611*4096kB (M) = 2579704kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 12027 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965969 pages RAM 0 pages HighMem/MovableOnly 328424 pages reserved audit: type=1400 audit(1519217115.826:72): avc: denied { create } for pid=7696 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_connector_socket permissive=1 netlink: 20 bytes leftover after parsing attributes in process `syz-executor6'. sctp: [Deprecated]: syz-executor4 (pid 7820) Use of int in maxseg socket option. Use struct sctp_assoc_value instead netlink: 20 bytes leftover after parsing attributes in process `syz-executor6'. sctp: [Deprecated]: syz-executor4 (pid 7826) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sg_write: data in/out 250/1 bytes for SCSI command 0x67-- guessing data in; program syz-executor1 not setting count and/or reply_len properly sg_write: data in/out 250/1 bytes for SCSI command 0x67-- guessing data in; program syz-executor1 not setting count and/or reply_len properly ipt_CLUSTERIP: ipt_CLUSTERIP is deprecated and it will removed soon, use xt_cluster instead QAT: Invalid ioctl QAT: Invalid ioctl xt_limit: Overflow, try lower: 2147483647/4 xt_limit: Overflow, try lower: 2147483647/4 raw_sendmsg: syz-executor5 forgot to set AF_INET. Fix it! x_tables: ip6_tables: DNPT target: used from hooks PREROUTING/INPUT/FORWARD/OUTPUT/POSTROUTING, but only usable from PREROUTING/OUTPUT x_tables: ip6_tables: DNPT target: used from hooks PREROUTING/INPUT/FORWARD/OUTPUT/POSTROUTING, but only usable from PREROUTING/OUTPUT xt_SECMARK: mode already set to 1 cannot mix with rules for mode 0 device eql entered promiscuous mode xt_hashlimit: hashlimit invalid interval x_tables: ip6_tables: TCPMSS target: only valid for protocol 6 xt_hashlimit: hashlimit invalid interval x_tables: ip6_tables: TCPMSS target: only valid for protocol 6