hub 9-0:1.0: USB hub found
hub 9-0:1.0: 8 ports detected
NILFS (loop4): recovery complete
NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
======================================================
WARNING: possible circular locking dependency detected
4.14.303-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.2/7995 is trying to acquire lock:
 (rtnl_mutex){+.+.}, at: [<ffffffff85c3239e>] unregister_netdevice_notifier+0x5e/0x2b0 net/core/dev.c:1630

but task is already holding lock:
 (&xt[i].mutex){+.+.}, at: [<ffffffff85f22c88>] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1088

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&xt[i].mutex){+.+.}:
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
       xt_find_target+0x3e/0x1e0 net/netfilter/x_tables.c:232
       xt_request_find_target net/netfilter/x_tables.c:261 [inline]
       xt_request_find_target+0x72/0xe0 net/netfilter/x_tables.c:254
       ipt_init_target+0xb9/0x250 net/sched/act_ipt.c:45
       __tcf_ipt_init+0x48d/0xc00 net/sched/act_ipt.c:168
       tcf_ipt_init+0x43/0x50 net/sched/act_ipt.c:202
       tcf_action_init_1+0x51a/0x9e0 net/sched/act_api.c:691
       tcf_action_init+0x26d/0x400 net/sched/act_api.c:760
       tcf_action_add net/sched/act_api.c:1088 [inline]
       tc_ctl_action+0x2e3/0x510 net/sched/act_api.c:1140
       rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322
       netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2454
       netlink_unicast_kernel net/netlink/af_netlink.c:1296 [inline]
       netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1322
       netlink_sendmsg+0x648/0xbc0 net/netlink/af_netlink.c:1893
       sock_sendmsg_nosec net/socket.c:646 [inline]
       sock_sendmsg+0xb5/0x100 net/socket.c:656
       ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062
       __sys_sendmsg+0xa3/0x120 net/socket.c:2096
       SYSC_sendmsg net/socket.c:2107 [inline]
       SyS_sendmsg+0x27/0x40 net/socket.c:2103
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x5e/0xd3

-> #0 (rtnl_mutex){+.+.}:
       lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
       __mutex_lock_common kernel/locking/mutex.c:756 [inline]
       __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
       unregister_netdevice_notifier+0x5e/0x2b0 net/core/dev.c:1630
       tee_tg_destroy+0x5c/0xb0 net/netfilter/xt_TEE.c:123
       cleanup_entry+0x232/0x310 net/ipv6/netfilter/ip6_tables.c:685
       __do_replace+0x38d/0x580 net/ipv4/netfilter/arp_tables.c:930
       do_replace net/ipv6/netfilter/ip6_tables.c:1162 [inline]
       do_ip6t_set_ctl+0x256/0x3b0 net/ipv6/netfilter/ip6_tables.c:1688
       nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
       nf_setsockopt+0x5f/0xb0 net/netfilter/nf_sockopt.c:115
       ipv6_setsockopt+0xc0/0x120 net/ipv6/ipv6_sockglue.c:944
       tcp_setsockopt+0x7b/0xc0 net/ipv4/tcp.c:2831
       SYSC_setsockopt net/socket.c:1865 [inline]
       SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
       do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
       entry_SYSCALL_64_after_hwframe+0x5e/0xd3

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&xt[i].mutex);
                               lock(rtnl_mutex);
                               lock(&xt[i].mutex);
  lock(rtnl_mutex);

 *** DEADLOCK ***

1 lock held by syz-executor.2/7995:
 #0:  (&xt[i].mutex){+.+.}, at: [<ffffffff85f22c88>] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1088

stack backtrace:
CPU: 1 PID: 7995 Comm: syz-executor.2 Not tainted 4.14.303-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0x1b2/0x281 lib/dump_stack.c:58
 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258
 check_prev_add kernel/locking/lockdep.c:1905 [inline]
 check_prevs_add kernel/locking/lockdep.c:2022 [inline]
 validate_chain kernel/locking/lockdep.c:2464 [inline]
 __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491
 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998
 __mutex_lock_common kernel/locking/mutex.c:756 [inline]
 __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
 unregister_netdevice_notifier+0x5e/0x2b0 net/core/dev.c:1630
 tee_tg_destroy+0x5c/0xb0 net/netfilter/xt_TEE.c:123
 cleanup_entry+0x232/0x310 net/ipv6/netfilter/ip6_tables.c:685
 __do_replace+0x38d/0x580 net/ipv4/netfilter/arp_tables.c:930
 do_replace net/ipv6/netfilter/ip6_tables.c:1162 [inline]
 do_ip6t_set_ctl+0x256/0x3b0 net/ipv6/netfilter/ip6_tables.c:1688
 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline]
 nf_setsockopt+0x5f/0xb0 net/netfilter/nf_sockopt.c:115
 ipv6_setsockopt+0xc0/0x120 net/ipv6/ipv6_sockglue.c:944
 tcp_setsockopt+0x7b/0xc0 net/ipv4/tcp.c:2831
 SYSC_setsockopt net/socket.c:1865 [inline]
 SyS_setsockopt+0x110/0x1e0 net/socket.c:1844
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x5e/0xd3
RIP: 0033:0x7ff0f422571a
RSP: 002b:00007ffff01eae58 EFLAGS: 00000202 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 00007ff0f422571a
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 00007ffff01eae80 R08: 00000000000003b8 R09: ffff000000000000
R10: 00007ff0f431d6c0 R11: 0000000000000202 R12: 00007ffff01eaee0
R13: 0000000000000003 R14: 00007ffff01eae7c R15: 00007ff0f431d660
ip6_tables: ip6tables: counters copy to user failed while replacing table
ip6_tables: ip6tables: counters copy to user failed while replacing table
9pnet: Insufficient options for proto=fd
NILFS (loop4): invalid segment: Checksum error in segment payload
NILFS (loop4): trying rollback from an earlier position
NILFS (loop4): recovery complete
NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
ip6_tables: ip6tables: counters copy to user failed while replacing table
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
NILFS (loop4): invalid segment: Checksum error in segment payload
NILFS (loop4): trying rollback from an earlier position
device bridge_slave_0 left promiscuous mode
NILFS (loop4): recovery complete
NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
bridge0: port 1(bridge_slave_0) entered disabled state
nla_parse: 7 callbacks suppressed
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'.
bridge0: port 2(bridge_slave_1) entered disabled state
bridge0: port 1(bridge_slave_0) entered disabled state
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'.
device bridge_slave_1 left promiscuous mode
bridge0: port 2(bridge_slave_1) entered disabled state
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'.
NILFS (loop4): invalid segment: Checksum error in segment payload
NILFS (loop4): trying rollback from an earlier position
NILFS (loop4): recovery complete
NILFS (loop4): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
device bridge_slave_1 left promiscuous mode
EXT4-fs warning (device sda1): ext4_resize_begin:82: There are errors in the filesystem, so online resizing is not allowed
bridge0: port 2(bridge_slave_1) entered disabled state
IPVS: ftp: loaded support on port[0] = 21
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
netlink: 116 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 116 bytes leftover after parsing attributes in process `syz-executor.2'.
ntfs: volume version 3.1.
ntfs: volume version 3.1.
audit: type=1804 audit(1674055238.138:104): pid=13821 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1793485125/syzkaller.xjfTYj/125/memory.events" dev="sda1" ino=14461 res=1
audit: type=1800 audit(1674055238.158:105): pid=13821 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="memory.events" dev="sda1" ino=14461 res=0
audit: type=1804 audit(1674055238.828:106): pid=13844 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1793485125/syzkaller.xjfTYj/126/memory.events" dev="sda1" ino=14474 res=1
ntfs: volume version 3.1.
audit: type=1800 audit(1674055238.828:107): pid=13844 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="memory.events" dev="sda1" ino=14474 res=0
audit: type=1804 audit(1674055239.059:108): pid=13858 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1793485125/syzkaller.xjfTYj/127/memory.events" dev="sda1" ino=14474 res=1
ntfs: volume version 3.1.
audit: type=1800 audit(1674055239.059:109): pid=13858 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="memory.events" dev="sda1" ino=14474 res=0
audit: type=1804 audit(1674055239.139:110): pid=13857 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir908287699/syzkaller.ufXtPV/158/memory.events" dev="sda1" ino=14485 res=1
audit: type=1800 audit(1674055239.139:111): pid=13857 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="memory.events" dev="sda1" ino=14485 res=0
dccp_close: ABORT with 103 bytes unread
audit: type=1804 audit(1674055239.699:112): pid=13894 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir908287699/syzkaller.ufXtPV/159/memory.events" dev="sda1" ino=14489 res=1
audit: type=1800 audit(1674055239.699:113): pid=13894 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="memory.events" dev="sda1" ino=14489 res=0
xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'.
dccp_close: ABORT with 103 bytes unread
xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'.
device ip6gretap1 left promiscuous mode
xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'.
device ip6gretap2 left promiscuous mode
xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'.
device ip6gretap3 left promiscuous mode