audit: type=1804 audit(1665498967.791:27): pid=10363 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir3850237070/syzkaller.py7JGs/40/bus" dev="sda1" ino=14064 res=1 audit: type=1804 audit(1665498967.841:28): pid=10304 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.0" name="/root/syzkaller-testdir832206162/syzkaller.l4GwT7/40/bus" dev="sda1" ino=14031 res=1 ====================================================== WARNING: possible circular locking dependency detected 4.14.295-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/8014 is trying to acquire lock: (rtnl_mutex){+.+.}, at: [] unregister_netdevice_notifier+0x5e/0x2b0 net/core/dev.c:1630 but task is already holding lock: (&xt[i].mutex){+.+.}, at: [] 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] 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:404 -> #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: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.4/8014: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1088 stack backtrace: CPU: 1 PID: 8014 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/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: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: 0033:0x7f857ed4cbfa RSP: 002b:00007ffe75148748 EFLAGS: 00000206 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000029 RCX: 00007f857ed4cbfa RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000003 RBP: 00007ffe75148770 R08: 00000000000003b8 R09: ffffffffffffff00 R10: 00007f857ee426c0 R11: 0000000000000206 R12: 00007ffe751487d0 R13: 0000000000000003 R14: 00007ffe7514876c R15: 00007f857ee42660 ip6_tables: ip6tables: counters copy to user failed while replacing table audit: type=1804 audit(1665498969.321:29): pid=10402 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir348419480/syzkaller.Or8p4H/25/bus" dev="sda1" ino=14082 res=1 chnl_net:chnl_net_open(): err: Unable to register and open device, Err:-19 audit: type=1804 audit(1665498969.331:30): pid=10402 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir348419480/syzkaller.Or8p4H/25/bus" dev="sda1" ino=14082 res=1 EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue audit: type=1804 audit(1665498969.371:31): pid=10400 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir3850237070/syzkaller.py7JGs/41/bus" dev="sda1" ino=14084 res=1 TCP: request_sock_TCPv6: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. audit: type=1804 audit(1665498969.451:32): pid=10417 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.0" name="/root/syzkaller-testdir832206162/syzkaller.l4GwT7/41/bus" dev="sda1" ino=14085 res=1 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  may have been left with an inconsistent configuration, please check. ip6_tables: ip6tables: counters copy to user failed while replacing table audit: type=1804 audit(1665498969.771:33): pid=10474 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir348419480/syzkaller.Or8p4H/26/bus" dev="sda1" ino=14074 res=1 EXT4-fs (loop5): mounted filesystem without journal. Opts: ,errors=continue unregister_netdevice: waiting for ip6gre0 to become free. Usage count = -1 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  may have been left with an inconsistent configuration, please check. print_req_error: I/O error, dev loop2, sector 0 print_req_error: I/O error, dev loop1, sector 0 loop2: [CUMANA/ADFS] p1 [Linux] p2 [ADFS] p1 [Linux] p2 loop2: partition table partially beyond EOD, truncated loop2: p1 size 2330135121 extends beyond EOD, truncated loop2: p2 start 82324704 is beyond EOD, truncated loop_reread_partitions: partition scan of loop2 () failed (rc=-16) print_req_error: I/O error, dev loop2, sector 0 print_req_error: I/O error, dev loop2, sector 0 Buffer I/O error on dev loop2p1, logical block 0, async page read print_req_error: I/O error, dev loop2, sector 1 Buffer I/O error on dev loop2p1, logical block 1, async page read print_req_error: I/O error, dev loop2, sector 2 Buffer I/O error on dev loop2p1, logical block 2, async page read print_req_error: I/O error, dev loop2, sector 3 Buffer I/O error on dev loop2p1, logical block 3, async page read print_req_error: I/O error, dev loop2, sector 4 Buffer I/O error on dev loop2p1, logical block 4, async page read print_req_error: I/O error, dev loop2, sector 5 Buffer I/O error on dev loop2p1, logical block 5, async page read print_req_error: I/O error, dev loop2, sector 6 Buffer I/O error on dev loop2p1, logical block 6, async page read Buffer I/O error on dev loop2p1, logical block 0, async page read Buffer I/O error on dev loop2p1, logical block 1, async page read Buffer I/O error on dev loop2p1, logical block 2, async page read kauditd_printk_skb: 80 callbacks suppressed audit: type=1804 audit(1665498972.611:114): pid=10644 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir348419480/syzkaller.Or8p4H/29/bus" dev="sda1" ino=14014 res=1 loop2: [CUMANA/ADFS] p1 [Linux] p2 [ADFS] p1 [Linux] p2 loop2: partition table partially beyond EOD, truncated loop2: p1 size 2330135121 extends beyond EOD, truncated loop2: p2 start 82324704 is beyond EOD, truncated audit: type=1804 audit(1665498972.751:115): pid=10644 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir348419480/syzkaller.Or8p4H/29/bus" dev="sda1" ino=14014 res=1 loop_reread_partitions: partition scan of loop2 () failed (rc=-16) loop_reread_partitions: partition scan of loop2 () failed (rc=-16) audit: type=1804 audit(1665498972.941:116): pid=10692 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir348419480/syzkaller.Or8p4H/30/bus" dev="sda1" ino=14092 res=1 loop2: [CUMANA/ADFS] p1 [Linux] p2 [ADFS] p1 [Linux] p2 loop2: partition table partially beyond EOD, truncated loop2: p1 size 2330135121 extends beyond EOD, truncated loop2: p2 start 82324704 is beyond EOD, truncated audit: type=1804 audit(1665498973.041:117): pid=10716 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir3850237070/syzkaller.py7JGs/45/bus" dev="sda1" ino=14069 res=1 audit: type=1804 audit(1665498973.041:118): pid=10717 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.1" name="/root/syzkaller-testdir3850237070/syzkaller.py7JGs/45/bus" dev="sda1" ino=14069 res=1 audit: type=1804 audit(1665498973.041:119): pid=10715 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir3850237070/syzkaller.py7JGs/45/bus" dev="sda1" ino=14069 res=1 L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. Bluetooth: hci5 command 0x0405 tx timeout audit: type=1804 audit(1665498974.041:120): pid=10803 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir3850237070/syzkaller.py7JGs/46/bus" dev="sda1" ino=14110 res=1 audit: type=1804 audit(1665498974.132:121): pid=10803 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.1" name="/root/syzkaller-testdir3850237070/syzkaller.py7JGs/46/bus" dev="sda1" ino=14110 res=1 audit: type=1804 audit(1665498974.162:122): pid=10795 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir3850237070/syzkaller.py7JGs/46/bus" dev="sda1" ino=14110 res=1 EXT4-fs (loop1): Unsupported blocksize for fs encryption EXT4-fs (loop1): Unsupported blocksize for fs encryption Zero length message leads to an empty skb 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 batman_adv: batadv0: Interface deactivated: batadv_slave_1 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes 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. 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 batman_adv: batadv0: Interface deactivated: batadv_slave_1 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes 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. IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes 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. IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes 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. IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes 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.