======================================================
WARNING: possible circular locking dependency detected
4.14.298-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.1/8012 is trying to acquire lock:
(rtnl_mutex){+.+.}, at: [<ffffffff85c2f16e>] unregister_netdevice_notifier+0x5e/0x2b0 net/core/dev.c:1630
but task is already holding lock:
(&xt[i].mutex){+.+.}, at: [<ffffffff85f1f8f8>] 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+0x5e/0xd3
-> #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]
rollback_registered_many+0x765/0xbb0 net/core/dev.c:7211
rollback_registered+0xca/0x170 net/core/dev.c:7253
unregister_netdevice_queue+0x1b4/0x360 net/core/dev.c:8274
unregister_netdevice include/linux/netdevice.h:2444 [inline]
__tun_detach+0xca2/0xf60 drivers/net/tun.c:584
tun_detach drivers/net/tun.c:594 [inline]
tun_chr_close+0x41/0x60 drivers/net/tun.c:2732
__fput+0x25f/0x7a0 fs/file_table.c:210
task_work_run+0x11f/0x190 kernel/task_work.c:113
tracehook_notify_resume include/linux/tracehook.h:191 [inline]
exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
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:937
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:
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.1/8012:
#0: (&xt[i].mutex){+.+.}, at: [<ffffffff85f1f8f8>] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1088
stack backtrace:
CPU: 0 PID: 8012 Comm: syz-executor.1 Not tainted 4.14.298-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
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/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:937
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
ip6_tables: ip6tables: counters copy to user failed while replacing table
ip6_tables: ip6tables: counters copy to user failed while replacing table
ip6_tables: ip6tables: counters copy to user failed while replacing table
ip6_tables: ip6tables: counters copy to user failed while replacing table
ip6_tables: ip6tables: counters copy to user failed while replacing table
ip6_tables: ip6tables: counters copy to user failed while replacing table
IPVS: ftp: loaded support on port[0] = 21
ip6_tables: ip6tables: counters copy to user failed while replacing table
ip6_tables: ip6tables: counters copy to user failed while replacing table
ip6_tables: ip6tables: counters copy to user failed while replacing table
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
set_target_expiration: 3 callbacks suppressed
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
nla_parse: 10 callbacks suppressed
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
NILFS (loop2): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'.
kvm: vcpu 0: requested 128 ns lapic timer period limited to 500000 ns
audit: type=1804 audit(1667503677.570:117): pid=16601 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir1013376273/syzkaller.RwgPpl/218/file0" dev="fuse" ino=1 res=1
audit: type=1804 audit(1667503677.890:118): pid=16650 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir1013376273/syzkaller.RwgPpl/219/file0" dev="fuse" ino=1 res=1
audit: type=1804 audit(1667503677.940:119): pid=16660 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir1710456579/syzkaller.gmIN3E/244/file0" dev="fuse" ino=1 res=1
audit: type=1804 audit(1667503677.970:120): pid=16662 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir1387217355/syzkaller.d0y1UQ/271/file0" dev="fuse" ino=1 res=1
audit: type=1804 audit(1667503677.970:121): pid=16663 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir1316125299/syzkaller.Iqpxcq/233/file0" dev="fuse" ino=1 res=1
audit: type=1804 audit(1667503677.970:122): pid=16664 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir420075903/syzkaller.LxQd8u/261/file0" dev="fuse" ino=1 res=1
audit: type=1804 audit(1667503677.970:123): pid=16665 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir1543291801/syzkaller.0fygQf/263/file0" dev="fuse" ino=1 res=1
audit: type=1804 audit(1667503678.180:124): pid=16683 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir1013376273/syzkaller.RwgPpl/220/file0" dev="fuse" ino=1 res=1
audit: type=1804 audit(1667503678.270:125): pid=16711 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir1316125299/syzkaller.Iqpxcq/234/file0" dev="fuse" ino=1 res=1
audit: type=1804 audit(1667503678.270:126): pid=16712 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir420075903/syzkaller.LxQd8u/262/file0" dev="fuse" ino=1 res=1