WARNING: possible circular locking dependency detected 4.14.304-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/11810 is trying to acquire lock: (&xt[i].mutex){+.+.}, at: [] match_revfn+0x43/0x210 net/netfilter/x_tables.c:332 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+0x765/0xbb0 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 rtnl_newlink+0x13fd/0x1830 net/core/rtnetlink.c:2773 rtnetlink_rcv_msg+0x3be/0xb10 net/core/rtnetlink.c:4322 netlink_rcv_skb+0x125/0x390 net/netlink/af_netlink.c:2454 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 (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 -> #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 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 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.3/11810: #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: 11810 Comm: syz-executor.3 Not tainted 4.14.304-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 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 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 RIP: 0033:0x7fdd075ee0c9 RSP: 002b:00007fdd05b60168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007fdd0770df80 RCX: 00007fdd075ee0c9 RDX: 0000000000000000 RSI: 0000000020000100 RDI: 0000000000000003 RBP: 00007fdd07649ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc72ef5dcf R14: 00007fdd05b60300 R15: 0000000000022000 IPVS: ftp: loaded support on port[0] = 21 kauditd_printk_skb: 12 callbacks suppressed audit: type=1804 audit(1675372195.095:47): pid=12071 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir237650063/syzkaller.NRslYC/89/bus" dev="sda1" ino=14218 res=1 audit: type=1804 audit(1675372196.255:48): pid=12123 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir237650063/syzkaller.NRslYC/90/bus" dev="sda1" ino=14059 res=1 ieee80211 phy0: mac80211_hwsim_start ieee80211 phy0: mac80211_hwsim_add_interface (type=2 mac_addr=02:00:00:00:00:00) ieee80211 phy0: mac80211_hwsim_bss_info_changed(changed=0xe vif->addr=02:00:00:00:00:00) ieee80211 phy0: ERP_CTS_PROT: 0 ieee80211 phy0: ERP_PREAMBLE: 0 ieee80211 phy0: ERP_SLOT: 0 ieee80211 phy0: mac80211_hwsim_conf_tx (queue=0 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_conf_tx (queue=1 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_conf_tx (queue=2 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_conf_tx (queue=3 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_bss_info_changed(changed=0x2000 vif->addr=02:00:00:00:00:00) ieee80211 phy0: mac80211_hwsim_config (freq=2412(2412 - 0)/noht idle=1 ps=0 smps=static) device wlan0 entered promiscuous mode ieee80211 phy0: mac80211_hwsim_configure_filter IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready audit: type=1800 audit(1675372196.716:49): pid=12150 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="sda1" ino=14236 res=0 ieee80211 phy0: mac80211_hwsim_configure_filter ieee80211 phy0: mac80211_hwsim_remove_interface (type=2 mac_addr=02:00:00:00:00:00) ieee80211 phy0: mac80211_hwsim_stop device wlan0 left promiscuous mode audit: type=1804 audit(1675372197.216:50): pid=12177 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir237650063/syzkaller.NRslYC/91/bus" dev="sda1" ino=14236 res=1 ieee80211 phy0: mac80211_hwsim_start ieee80211 phy0: mac80211_hwsim_add_interface (type=2 mac_addr=02:00:00:00:00:00) ieee80211 phy0: mac80211_hwsim_bss_info_changed(changed=0xe vif->addr=02:00:00:00:00:00) ieee80211 phy0: ERP_CTS_PROT: 0 ieee80211 phy0: ERP_PREAMBLE: 0 ieee80211 phy0: ERP_SLOT: 0 ieee80211 phy0: mac80211_hwsim_conf_tx (queue=0 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_conf_tx (queue=1 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_conf_tx (queue=2 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_conf_tx (queue=3 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_bss_info_changed(changed=0x2000 vif->addr=02:00:00:00:00:00) ieee80211 phy0: mac80211_hwsim_config (freq=2412(2412 - 0)/noht idle=1 ps=0 smps=static) ieee80211 phy0: mac80211_hwsim_configure_filter device wlan0 entered promiscuous mode ieee80211 phy0: mac80211_hwsim_configure_filter ieee80211 phy0: mac80211_hwsim_configure_filter ieee80211 phy0: mac80211_hwsim_configure_filter IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready ieee80211 phy0: mac80211_hwsim_configure_filter ieee80211 phy0: mac80211_hwsim_remove_interface (type=2 mac_addr=02:00:00:00:00:00) ieee80211 phy0: mac80211_hwsim_stop device wlan0 left promiscuous mode tmpfs: Bad value 'advis' for mount option 'huge' ieee80211 phy0: mac80211_hwsim_start ieee80211 phy0: mac80211_hwsim_add_interface (type=2 mac_addr=02:00:00:00:00:00) ieee80211 phy0: mac80211_hwsim_bss_info_changed(changed=0xe vif->addr=02:00:00:00:00:00) ieee80211 phy0: ERP_CTS_PROT: 0 ieee80211 phy0: ERP_PREAMBLE: 0 ieee80211 phy0: ERP_SLOT: 0 ieee80211 phy0: mac80211_hwsim_conf_tx (queue=0 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_conf_tx (queue=1 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_conf_tx (queue=2 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_conf_tx (queue=3 txop=0 cw_min=15 cw_max=1023 aifs=2) ieee80211 phy0: mac80211_hwsim_bss_info_changed(changed=0x2000 vif->addr=02:00:00:00:00:00) ieee80211 phy0: mac80211_hwsim_config (freq=2412(2412 - 0)/noht idle=1 ps=0 smps=static) ieee80211 phy0: mac80211_hwsim_configure_filter device wlan0 entered promiscuous mode ieee80211 phy0: mac80211_hwsim_configure_filter ieee80211 phy0: mac80211_hwsim_configure_filter ieee80211 phy0: mac80211_hwsim_configure_filter IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready ieee80211 phy0: mac80211_hwsim_configure_filter ieee80211 phy0: mac80211_hwsim_remove_interface (type=2 mac_addr=02:00:00:00:00:00) ieee80211 phy0: mac80211_hwsim_stop device wlan0 left promiscuous mode audit: type=1804 audit(1675372198.426:51): pid=12242 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir237650063/syzkaller.NRslYC/92/bus" dev="sda1" ino=14094 res=1 tmpfs: Bad value 'advis' for mount option 'huge' tmpfs: Bad value 'advis' for mount option 'huge' tmpfs: Bad value 'advis' for mount option 'huge' tmpfs: Bad value 'advis' for mount option 'huge' tmpfs: Bad value 'advis' for mount option 'huge' tmpfs: Bad value 'advis' for mount option 'huge' audit: type=1800 audit(1675372200.216:52): pid=12332 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="sda1" ino=14262 res=0 audit: type=1804 audit(1675372200.216:53): pid=12332 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir109764931/syzkaller.d0O144/82/file0" dev="sda1" ino=14262 res=1 audit: type=1800 audit(1675372200.976:54): pid=12349 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="sda1" ino=14242 res=0 audit: type=1804 audit(1675372200.986:55): pid=12349 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir109764931/syzkaller.d0O144/83/file0" dev="sda1" ino=14242 res=1 ntfs: volume version 3.1. audit: type=1800 audit(1675372201.496:56): pid=12370 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="sda1" ino=14242 res=0 audit: type=1804 audit(1675372201.506:57): pid=12370 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir109764931/syzkaller.d0O144/84/file0" dev="sda1" ino=14242 res=1 audit: type=1800 audit(1675372201.766:58): pid=12394 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="file0" dev="sda1" ino=14253 res=0 audit: type=1804 audit(1675372201.766:59): pid=12394 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir109764931/syzkaller.d0O144/85/file0" dev="sda1" ino=14253 res=1 IPVS: sync thread started: state = MASTER, mcast_ifn = batadv_slave_0, syncid = 0, id = 0 ntfs: volume version 3.1. EXT4-fs (loop3): mounted filesystem without journal. Opts: ,errors=continue batman_adv: Cannot find parent device device gretap1 entered promiscuous mode