====================================================== WARNING: possible circular locking dependency detected 4.14.286-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/11720 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 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+0x46/0xbb -> #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/ipv6/netfilter/ip6_tables.c:1106 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 IPVS: sync thread started: state = BACKUP, mcast_ifn = veth0, syncid = 2, id = 0 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 input: syz1 as /devices/virtual/input/input5 (&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+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.1/11720: #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: 0 PID: 11720 Comm: syz-executor.1 Not tainted 4.14.286-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 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 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 audit: type=1804 audit(1656784791.468:21): pid=11735 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir3936164631/syzkaller.B8doIk/74/file0" dev="sda1" ino=14157 res=1 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: 0033:0x7f4394f2c109 RSP: 002b:00007f43938a1168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f439503ef60 RCX: 00007f4394f2c109 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000003 RBP: 00007f4394f8605d R08: 0000000000000000 R09: 0000000000000000 audit: type=1804 audit(1656784791.468:22): pid=11740 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir3936164631/syzkaller.B8doIk/74/file0" dev="sda1" ino=14157 res=1 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc718929cf R14: 00007f43938a1300 R15: 0000000000022000 audit: type=1804 audit(1656784791.468:23): pid=11748 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir3936164631/syzkaller.B8doIk/75/file0" dev="sda1" ino=14157 res=1 input: syz1 as /devices/virtual/input/input6 audit: type=1804 audit(1656784791.468:24): pid=11749 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir3936164631/syzkaller.B8doIk/75/file0" dev="sda1" ino=14157 res=1 audit: type=1804 audit(1656784792.289:25): pid=11762 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir3936164631/syzkaller.B8doIk/76/file0" dev="sda1" ino=14129 res=1 audit: type=1804 audit(1656784792.469:26): pid=11777 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir3936164631/syzkaller.B8doIk/76/file0" dev="sda1" ino=14129 res=1 audit: type=1804 audit(1656784792.869:27): pid=11815 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir3936164631/syzkaller.B8doIk/77/file0" dev="sda1" ino=14158 res=1 input: syz1 as /devices/virtual/input/input7 audit: type=1804 audit(1656784793.019:28): pid=11820 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir3936164631/syzkaller.B8doIk/77/file0" dev="sda1" ino=14158 res=1 audit: type=1804 audit(1656784793.189:29): pid=11843 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.5" name="/root/syzkaller-testdir3934790746/syzkaller.hOmhAg/82/file0" dev="sda1" ino=14159 res=1 IPVS: sync thread started: state = BACKUP, mcast_ifn = veth0, syncid = 2, id = 0 input: syz1 as /devices/virtual/input/input8 IPVS: sync thread started: state = BACKUP, mcast_ifn = veth0, syncid = 2, id = 0 IPVS: sync thread started: state = BACKUP, mcast_ifn = veth0, syncid = 2, id = 0 PM: Starting manual resume from disk PM: Image not found (code -22) kauditd_printk_skb: 21 callbacks suppressed audit: type=1804 audit(1656784795.179:51): pid=11981 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir4230483721/syzkaller.GBlJL2/81/file0" dev="sda1" ino=14202 res=1 PM: Starting manual resume from disk PM: Image not found (code -22) audit: type=1804 audit(1656784795.319:52): pid=11990 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir4230483721/syzkaller.GBlJL2/81/file0" dev="sda1" ino=14202 res=1 PM: Starting manual resume from disk PM: Image not found (code -22) PM: Starting manual resume from disk PM: Image not found (code -22) bridge0: port 3(ipvlan2) entered blocking state bridge0: port 3(ipvlan2) entered disabled state 8021q: adding VLAN 0 to HW filter on device team0 bond0: Enslaving team0 as an active interface with an up link bridge0: port 3(ipvlan2) entered blocking state bridge0: port 3(ipvlan2) entered disabled state bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode bridge0: port 3(team0) entered disabled state 8021q: adding VLAN 0 to HW filter on device team0 bond0: Enslaving team0 as an active interface with an up link bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device team0 bond0: Enslaving team0 as an active interface with an up link bridge0: port 3(ipvlan2) entered blocking state bridge0: port 3(ipvlan2) entered disabled state device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode bridge0: port 3(team0) entered disabled state 8021q: adding VLAN 0 to HW filter on device team0 bond0: Enslaving team0 as an active interface with an up link bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state syz-executor.0 (12175) used greatest stack depth: 24144 bytes left device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode bridge0: port 3(team0) entered disabled state 8021q: adding VLAN 0 to HW filter on device team0 bond0: Enslaving team0 as an active interface with an up link device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode bridge0: port 3(team0) entered disabled state 8021q: adding VLAN 0 to HW filter on device team0 bond0: Enslaving team0 as an active interface with an up link bridge0: port 3(ipvlan2) entered blocking state bridge0: port 3(ipvlan2) entered disabled state bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state syz-executor.0 (12249) used greatest stack depth: 23776 bytes left device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode bridge0: port 3(team0) entered disabled state 8021q: adding VLAN 0 to HW filter on device team0 bond0: Enslaving team0 as an active interface with an up link bond0: Releasing backup interface team0 bridge0: port 3(team0) entered blocking state bridge0: port 3(team0) entered disabled state device team0 entered promiscuous mode device team_slave_0 entered promiscuous mode device team_slave_1 entered promiscuous mode nla_parse: 11 callbacks suppressed netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. FAT-fs (loop0): error, corrupted directory (invalid entries) FAT-fs (loop0): Filesystem has been set read-only ntfs: (device loop5): read_ntfs_boot_sector(): Primary boot sector is invalid. ntfs: (device loop5): read_ntfs_boot_sector(): Mount option errors=recover not used. Aborting without trying to recover. ntfs: (device loop5): ntfs_fill_super(): Not an NTFS volume. print_req_error: I/O error, dev loop5, sector 1 Buffer I/O error on dev loop5, logical block 1, async page read print_req_error: I/O error, dev loop5, sector 2 Buffer I/O error on dev loop5, logical block 2, async page read print_req_error: I/O error, dev loop5, sector 3 Buffer I/O error on dev loop5, logical block 3, async page read print_req_error: I/O error, dev loop5, sector 4 Buffer I/O error on dev loop5, logical block 4, async page read print_req_error: I/O error, dev loop5, sector 5 Buffer I/O error on dev loop5, logical block 5, async page read print_req_error: I/O error, dev loop5, sector 6 Buffer I/O error on dev loop5, logical block 6, async page read print_req_error: I/O error, dev loop5, sector 7 Buffer I/O error on dev loop5, logical block 7, async page read input: syz1 as /devices/virtual/input/input9 input: syz1 as /devices/virtual/input/input10 input: syz1 as /devices/virtual/input/input11 input: syz1 as /devices/virtual/input/input12 audit: type=1326 audit(1656784801.320:53): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=12719 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f0e6fe31109 code=0x7ffc0000 audit: type=1326 audit(1656784801.350:54): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=12719 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=317 compat=0 ip=0x7f0e6fe31109 code=0x7ffc0000 audit: type=1326 audit(1656784801.350:55): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=12719 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x7f0e6fe31109 code=0x7ffc0000 audit: type=1326 audit(1656784801.350:56): auid=4294967295 uid=0 gid=0 ses=4294967295 pid=12719 comm="syz-executor.3" exe="/root/syz-executor.3" sig=0 arch=c000003e syscall=298 compat=0 ip=0x7f0e6fe31109 code=0x7ffc0000