======================================================
WARNING: possible circular locking dependency detected
4.14.295-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.4/7991 is trying to acquire lock:
(rtnl_mutex){+.+.}, at: [<ffffffff85c2a12e>] unregister_netdevice_notifier+0x5e/0x2b0 net/core/dev.c:1630
but task is already holding lock:
(&xt[i].mutex){+.+.}, at: [<ffffffff85f1a908>] 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:
-> #2 (&xt[i].mutex){+.+.}:
__mutex_lock_common kernel/locking/mutex.c:756 [inline]
__mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
match_revfn+0x43/0x210 net/netfilter/x_tables.c:332
xt_find_revision+0x8d/0x1d0 net/netfilter/x_tables.c:380
nfnl_compat_get+0x1f7/0x870 net/netfilter/nft_compat.c:678
nfnetlink_rcv_msg+0x9bb/0xc00 net/netfilter/nfnetlink.c:214
netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2454
nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515
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+0x46/0xbb
-> #1 (&table[i].mutex){+.+.}:
__mutex_lock_common kernel/locking/mutex.c:756 [inline]
__mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893
nf_tables_netdev_event+0x10d/0x4d0 net/netfilter/nf_tables_netdev.c:122
notifier_call_chain+0x108/0x1a0 kernel/notifier.c:93
call_netdevice_notifiers_info net/core/dev.c:1667 [inline]
call_netdevice_notifiers net/core/dev.c:1683 [inline]
dev_change_name+0x3ef/0x6a0 net/core/dev.c:1232
dev_ifsioc+0x2c2/0x7d0 net/core/dev_ioctl.c:323
dev_ioctl+0x63f/0xbe0 net/core/dev_ioctl.c:515
sock_do_ioctl net/socket.c:981 [inline]
sock_ioctl+0x164/0x4c0 net/socket.c:1071
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:500 [inline]
do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684
SYSC_ioctl fs/ioctl.c:701 [inline]
SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x46/0xbb
-> #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/ipv6/netfilter/ip6_tables.c:1106
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:937
tcp_setsockopt+0x7b/0xc0 net/ipv4/tcp.c:2830
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+0x46/0xbb
other info that might help us debug this:
Chain exists of:
rtnl_mutex --> &table[i].mutex --> &xt[i].mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&xt[i].mutex);
lock(&table[i].mutex);
lock(&xt[i].mutex);
lock(rtnl_mutex);
*** DEADLOCK ***
1 lock held by syz-executor.4/7991:
#0: (&xt[i].mutex){+.+.}, at: [<ffffffff85f1a908>] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1088
stack backtrace:
CPU: 0 PID: 7991 Comm: syz-executor.4 Not tainted 4.14.295-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
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/ipv6/netfilter/ip6_tables.c:1106
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:937
tcp_setsockopt+0x7b/0xc0 net/ipv4/tcp.c:2830
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+0x46/0xbb
RIP: 0033:0x7fd5289efbfa
RSP: 002b:00007ffd24ea9178 EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 00007fd5289efbfa
RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003
RBP: 00007ffd24ea91a0 R08: 00000000000002e8 R09: ffffffffffff0000
R10: 00007fd528ae5000 R11: 0000000000000206 R12: 00007ffd24ea9200
R13: 0000000000000003 R14: 00007ffd24ea919c R15: 00007fd528ae4fa0
audit: type=1800 audit(1665008431.669:27): pid=11219 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.3" name="SYSV00000000" dev="hugetlbfs" ino=98304 res=0
audit: type=1800 audit(1665008431.809:28): pid=11234 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed" comm="syz-executor.1" name="SYSV00000000" dev="hugetlbfs" ino=65536 res=0
bridge0: port 3(team0) entered blocking state
bridge0: port 3(team0) entered disabled state
device team0 entered promiscuous mode
device team_slave_0 entered promiscuous mode
device team_slave_1 entered promiscuous mode
bridge0: port 3(team0) entered blocking state
bridge0: port 3(team0) entered forwarding state
unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1