IPVS: ftp: loaded support on port[0] = 21
nbd: socks must be embedded in a SOCK_ITEM attr
netlink: 52 bytes leftover after parsing attributes in process `syz-executor.2'.
nbd: socks must be embedded in a SOCK_ITEM attr
======================================================
WARNING: possible circular locking dependency detected
4.14.302-syzkaller #0 Not tainted
------------------------------------------------------
kworker/u4:2/8189 is trying to acquire lock:
(&table[i].mutex){+.+.}, at: [<ffffffff85f097bd>] nf_tables_netdev_event+0x10d/0x4d0 net/netfilter/nf_tables_netdev.c:122
but task is already holding lock:
(rtnl_mutex){+.+.}, at: [<ffffffff864bb5f0>] ip6gre_exit_net+0x70/0x570 net/ipv6/ip6_gre.c:1207
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+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
-> #1 (&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
-> #0 (&table[i].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
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
unregister_netdevice_many.part.0+0x18/0x2e0 net/core/dev.c:8293
unregister_netdevice_many+0x36/0x50 net/core/dev.c:8292
ip6gre_exit_net+0x41e/0x570 net/ipv6/ip6_gre.c:1209
ops_exit_list+0xad/0x160 net/core/net_namespace.c:142
cleanup_net+0x3b3/0x840 net/core/net_namespace.c:487
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
other info that might help us debug this:
Chain exists of:
&table[i].mutex --> &xt[i].mutex --> rtnl_mutex
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(rtnl_mutex);
lock(&xt[i].mutex);
lock(rtnl_mutex);
lock(&table[i].mutex);
*** DEADLOCK ***
4 locks held by kworker/u4:2/8189:
#0: ("%s""netns"){+.+.}, at: [<ffffffff81366130>] process_one_work+0x6b0/0x14a0 kernel/workqueue.c:2088
#1: (net_cleanup_work){+.+.}, at: [<ffffffff81366166>] process_one_work+0x6e6/0x14a0 kernel/workqueue.c:2092
#2: (net_mutex){+.+.}, at: [<ffffffff85c22e10>] cleanup_net+0x110/0x840 net/core/net_namespace.c:453
#3: (rtnl_mutex){+.+.}, at: [<ffffffff864bb5f0>] ip6gre_exit_net+0x70/0x570 net/ipv6/ip6_gre.c:1207
stack backtrace:
CPU: 0 PID: 8189 Comm: kworker/u4:2 Not tainted 4.14.302-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: netns cleanup_net
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
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
unregister_netdevice_many.part.0+0x18/0x2e0 net/core/dev.c:8293
unregister_netdevice_many+0x36/0x50 net/core/dev.c:8292
ip6gre_exit_net+0x41e/0x570 net/ipv6/ip6_gre.c:1209
ops_exit_list+0xad/0x160 net/core/net_namespace.c:142
cleanup_net+0x3b3/0x840 net/core/net_namespace.c:487
process_one_work+0x793/0x14a0 kernel/workqueue.c:2117
worker_thread+0x5cc/0xff0 kernel/workqueue.c:2251
kthread+0x30d/0x420 kernel/kthread.c:232
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:406
QAT: failed to copy from user cfg_data.
BTRFS: device fsid a6a605fc-d5f1-4e66-8595-3726e2b761d6 devid 1 transid 8 /dev/loop1
BTRFS error (device loop1): unsupported checksum algorithm 3
BTRFS error (device loop1): superblock checksum mismatch
BTRFS error (device loop1): open_ctree failed
caif:caif_disconnect_client(): nothing to disconnect
caif:caif_disconnect_client(): nothing to disconnect
syz-executor.5 (10824) used greatest stack depth: 24520 bytes left
Bluetooth: hci4 command 0x0401 tx timeout