====================================================== WARNING: possible circular locking dependency detected 4.14.224-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/10586 is trying to acquire lock: (&xt[i].mutex){+.+.}, at: [] xt_find_revision+0x88/0x200 net/netfilter/x_tables.c:373 but task is already holding lock: (&table[i].mutex){+.+.}, at: [] nfnl_lock net/netfilter/nfnetlink.c:61 [inline] (&table[i].mutex){+.+.}, at: [] nfnetlink_rcv_msg+0x726/0xc00 net/netfilter/nfnetlink.c:209 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&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+0x765/0xba0 net/core/dev.c:7203 unregister_netdevice_many.part.0+0x18/0x2e0 net/core/dev.c:8285 unregister_netdevice_many+0x36/0x50 net/core/dev.c:8284 ip6gre_exit_net+0x41e/0x570 net/ipv6/ip6_gre.c:1212 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:142 cleanup_net+0x3b3/0x840 net/core/net_namespace.c:484 process_one_work+0x793/0x14a0 kernel/workqueue.c:2116 worker_thread+0x5cc/0xff0 kernel/workqueue.c:2250 kthread+0x30d/0x420 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 -> #1 (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:684 __do_replace+0x38d/0x580 net/ipv6/netfilter/ip6_tables.c:1105 do_replace net/ipv6/netfilter/ip6_tables.c:1161 [inline] do_ip6t_set_ctl+0x256/0x3b0 net/ipv6/netfilter/ip6_tables.c:1685 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 udpv6_setsockopt+0x45/0x80 net/ipv6/udp.c:1459 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 -> #0 (&xt[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 xt_find_revision+0x88/0x200 net/netfilter/x_tables.c:373 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:2433 nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878 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 other info that might help us debug this: Chain exists of: &xt[i].mutex --> rtnl_mutex --> &table[i].mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&table[i].mutex); lock(rtnl_mutex); lock(&table[i].mutex); lock(&xt[i].mutex); *** DEADLOCK *** 1 lock held by syz-executor.1/10586: #0: (&table[i].mutex){+.+.}, at: [] nfnl_lock net/netfilter/nfnetlink.c:61 [inline] #0: (&table[i].mutex){+.+.}, at: [] nfnetlink_rcv_msg+0x726/0xc00 net/netfilter/nfnetlink.c:209 stack backtrace: CPU: 1 PID: 10586 Comm: syz-executor.1 Not tainted 4.14.224-syzkaller #0 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+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 xt_find_revision+0x88/0x200 net/netfilter/x_tables.c:373 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:2433 nfnetlink_rcv+0x1ab/0x1da0 net/netfilter/nfnetlink.c:515 netlink_unicast_kernel net/netlink/af_netlink.c:1287 [inline] netlink_unicast+0x437/0x610 net/netlink/af_netlink.c:1313 netlink_sendmsg+0x62e/0xb80 net/netlink/af_netlink.c:1878 kauditd_printk_skb: 11 callbacks suppressed audit: type=1800 audit(1615443188.362:49): pid=10602 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="file0" dev="sda1" ino=15877 res=0 audit: type=1804 audit(1615443188.362:50): pid=10602 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir969540381/syzkaller.fJPBG8/33/file0" dev="sda1" ino=15877 res=1 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 RIP: 0033:0x465f69 RSP: 002b:00007f9de1067188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000004 RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fff7ed4547f R14: 00007f9de1067300 R15: 0000000000022000 EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue overlayfs: filesystem on './file0' not supported as upperdir EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. bridge0: port 2(bridge_slave_1) entered disabled state bridge0: port 1(bridge_slave_0) entered disabled state batman_adv: batadv0: Interface deactivated: batadv_slave_0 libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error batman_adv: batadv0: Interface deactivated: batadv_slave_1 device veth3 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): veth3: link is not ready libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error ceph: No mds server is up or the cluster is laggy IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. ceph: No mds server is up or the cluster is laggy device veth6 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): veth6: link is not ready libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error ceph: No mds server is up or the cluster is laggy libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error libceph: connect [d::]:6789 error -101 libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error libceph: mon0 [d::]:6789 connect error libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. ceph: No mds server is up or the cluster is laggy IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready ceph: No mds server is up or the cluster is laggy libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 caif:caif_disconnect_client(): nothing to disconnect chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT chnl_net:chnl_net_open(): state disconnected A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. syz-executor.2 (11047) used greatest stack depth: 24400 bytes left device veth7 entered promiscuous mode ceph: No mds server is up or the cluster is laggy IPv6: ADDRCONF(NETDEV_UP): veth7: link is not ready netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'. EXT4-fs (loop4): mounted filesystem without journal. Opts: max_dir_size_kb=0x0000000000000000,,errors=continue libceph: connect [d::]:6789 error -101 libceph: mon0 [d::]:6789 connect error IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready audit: type=1804 audit(1615443193.242:51): pid=11169 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir601392564/syzkaller.RGaMot/41/bus" dev="sda1" ino=15938 res=1 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready 8021q: adding VLAN 0 to HW filter on device bond0 IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready 8021q: adding VLAN 0 to HW filter on device team0 sd 0:0:1:0: [sg0] tag#5998 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 sd 0:0:1:0: [sg0] tag#5998 CDB: Get configuration sd 0:0:1:0: [sg0] tag#5998 CDB[00]: 46 ad ce 38 6c fe bf a4 19 69 ce 15 d6 69 80 95 sd 0:0:1:0: [sg0] tag#5998 CDB[10]: b9 67 c1 55 e0 f9 0c 88 df ca b1 f1 b4 dd d8 b7 caif:caif_disconnect_client(): nothing to disconnect sd 0:0:1:0: [sg0] tag#5998 CDB[20]: 1e d3 7d 4f 48 f1 sd 0:0:1:0: [sg0] tag#5998 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#5998 CDB: Get configuration sd 0:0:1:0: [sg0] tag#5998 CDB[00]: 46 ad ce 38 6c fe bf a4 19 69 ce 15 d6 69 80 95 sd 0:0:1:0: [sg0] tag#5998 CDB[10]: b9 67 c1 55 e0 f9 0c 88 df ca b1 f1 b4 dd d8 b7 sd 0:0:1:0: [sg0] tag#5998 CDB[20]: 1e d3 7d 4f 48 f1 chnl_net:chnl_flowctrl_cb(): NET flowctrl func called flow: CLOSE/DEINIT sd 0:0:1:0: [sg0] tag#5998 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#5998 CDB: Get configuration sd 0:0:1:0: [sg0] tag#5998 CDB[00]: 46 ad ce 38 6c fe bf a4 19 69 ce 15 d6 69 80 95 chnl_net:chnl_net_open(): state disconnected sd 0:0:1:0: [sg0] tag#5998 CDB[10]: b9 67 c1 55 e0 f9 0c 88 df ca b1 f1 b4 dd d8 b7 sd 0:0:1:0: [sg0] tag#5998 CDB[20]: 1e d3 7d 4f 48 f1 A link change request failed with some changes committed already. Interface caif0 may have been left with an inconsistent configuration, please check. ceph: No mds server is up or the cluster is laggy device veth8 entered promiscuous mode IPv6: ADDRCONF(NETDEV_UP): veth8: link is not ready sd 0:0:1:0: [sg0] tag#6006 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#6006 CDB: Get configuration sd 0:0:1:0: [sg0] tag#5998 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#6006 CDB[00]: 46 ad ce 38 6c fe bf a4 19 69 ce 15 d6 69 80 95 sd 0:0:1:0: [sg0] tag#6006 CDB[10]: b9 67 c1 55 e0 f9 0c 88 df ca b1 f1 b4 dd d8 b7 sd 0:0:1:0: [sg0] tag#5998 CDB: Get configuration sd 0:0:1:0: [sg0] tag#6006 CDB[20]: 1e d3 7d 4f 48 f1 sd 0:0:1:0: [sg0] tag#5998 CDB[00]: 46 ad ce 38 6c fe bf a4 19 69 ce 15 d6 69 80 95 sd 0:0:1:0: [sg0] tag#5998 CDB[10]: b9 67 c1 55 e0 f9 0c 88 df ca b1 f1 b4 dd d8 b7 sd 0:0:1:0: [sg0] tag#5998 CDB[20]: 1e d3 7d 4f 48 f1 audit: type=1804 audit(1615443195.562:52): pid=11233 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir601392564/syzkaller.RGaMot/42/bus" dev="sda1" ino=15974 res=1 sd 0:0:1:0: [sg0] tag#5998 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#5998 CDB: Get configuration sd 0:0:1:0: [sg0] tag#5998 CDB[00]: 46 ad ce 38 6c fe bf a4 19 69 ce 15 d6 69 80 95 sd 0:0:1:0: [sg0] tag#5998 CDB[10]: b9 67 c1 55 e0 f9 0c 88 df ca b1 f1 b4 dd d8 b7 sd 0:0:1:0: [sg0] tag#5998 CDB[20]: 1e d3 7d 4f 48 f1 sd 0:0:1:0: [sg0] tag#5998 FAILED Result: hostbyte=DID_ABORT driverbyte=DRIVER_OK sd 0:0:1:0: [sg0] tag#5998 CDB: Get configuration sd 0:0:1:0: [sg0] tag#5998 CDB[00]: 46 ad ce 38 6c fe bf a4 19 69 ce 15 d6 69 80 95 sd 0:0:1:0: [sg0] tag#5998 CDB[10]: b9 67 c1 55 e0 f9 0c 88 df ca b1 f1 b4 dd d8 b7 sd 0:0:1:0: [sg0] tag#5998 CDB[20]: 1e d3 7d 4f 48 f1