====================================================== WARNING: possible circular locking dependency detected Process accounting resumed 4.14.225-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/18314 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 Process accounting resumed 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 rollback_registered+0xca/0x170 net/core/dev.c:7245 unregister_netdevice_queue+0x1b4/0x360 net/core/dev.c:8266 br_del_bridge+0xa9/0xe0 net/bridge/br_if.c:419 br_ioctl_deviceless_stub+0x1ff/0x5f0 net/bridge/br_ioctl.c:380 sock_ioctl+0x254/0x4c0 net/socket.c:1038 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x75a/0xff0 fs/ioctl.c:684 SYSC_ioctl fs/ioctl.c:701 [inline] SyS_ioctl+0x7f/0xb0 fs/ioctl.c:692 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 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+0x1fd/0x2d0 net/ipv4/netfilter/ip_tables.c:666 __do_replace+0x38d/0x570 net/ipv4/netfilter/ip_tables.c:1086 do_replace net/ipv4/netfilter/ip_tables.c:1142 [inline] do_ipt_set_ctl+0x256/0x3a0 net/ipv4/netfilter/ip_tables.c:1674 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x5f/0xb0 net/netfilter/nf_sockopt.c:115 ip_setsockopt net/ipv4/ip_sockglue.c:1255 [inline] ip_setsockopt+0x94/0xb0 net/ipv4/ip_sockglue.c:1240 raw_setsockopt+0xac/0xd0 net/ipv4/raw.c:857 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.3/18314: #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: 18314 Comm: syz-executor.3 Not tainted 4.14.225-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 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:00007fac055e8188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465f69 RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000003 RBP: 00000000004bfa8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffe69ec30df R14: 00007fac055e8300 R15: 0000000000022000 REISERFS warning (device loop4): super-6508 reiserfs_parse_options: bad value 0x000000( for -ocommit REISERFS warning (device loop4): super-6508 reiserfs_parse_options: bad value 0x000000( for -ocommit audit: type=1800 audit(1615541438.988:41): pid=18400 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.4" name="file0" dev="sda1" ino=15922 res=0 print_req_error: I/O error, dev loop4, sector 0 EXT4-fs warning (device sda1): ext4_resize_begin:72: There are errors in the filesystem, so online resizing is not allowed REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "comOit=0x000000(" EXT4-fs warning (device sda1): ext4_resize_begin:72: There are errors in the filesystem, so online resizing is not allowed REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "comOit=0x000000(" REISERFS warning (device loop4): super-6508 reiserfs_parse_options: bad value 0x000000( for -ocommit REISERFS warning (device loop4): super-6508 reiserfs_parse_options: bad value 0x000000( for -ocommit REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option " " REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option " " REISERFS warning (device loop4): super-6508 reiserfs_parse_options: bad value 0x000000( for -ocommit REISERFS warning (device loop4): reiserfs_fill_super: Cannot allocate commit workqueue REISERFS warning (device loop4): super-6508 reiserfs_parse_options: bad value 0x000000( for -ocommit REISERFS warning (device loop4): super-6508 reiserfs_parse_options: bad value 0x000000( for -ocommit REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "׫J76?3jю/)S~7>%46%" REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "׫J76?3jю/)S~7>%46%" REISERFS warning (device loop4): super-6508 reiserfs_parse_options: bad value 0x000000( for -ocommit REISERFS warning (device loop4): sh-2021 reiserfs_fill_super: can not find reiserfs on loop4 REISERFS warning (device loop4): sh-2021 reiserfs_fill_super: can not find reiserfs on loop4 REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "com{it=0x̲vO{000000(3ʯKEzu+y"`v=+n|TqNo" REISERFS warning (device loop4): super-6508 reiserfs_parse_options: bad value 0x000000( for -ocommit REISERFS warning (device loop4): super-6508 reiserfs_parse_options: bad value 0x000000( for -ocommit REISERFS warning (device loop4): sh-2021 reiserfs_fill_super: can not find reiserfs on loop4 REISERFS warning (device loop4): sh-2021 reiserfs_fill_super: can not find reiserfs on loop4 REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "" REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "0xffffffffffffffff" REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "0xffffffffffffffff" REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "commi]HQ`Iׁ<&t" REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "commi]HQ`Iׁ<&t" REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "com-Fx003מNJ" IPv6: ADDRCONF(NETDEV_UP): bond5: link is not ready 8021q: adding VLAN 0 to HW filter on device bond5 REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "com-Fx003מNJ" team0: Port device bond5 added IPv6: ADDRCONF(NETDEV_UP): bond6: link is not ready 8021q: adding VLAN 0 to HW filter on device bond6 team0: Port device bond6 added IPv6: ADDRCONF(NETDEV_UP): bond7: link is not ready 8021q: adding VLAN 0 to HW filter on device bond7 team0: Port device bond7 added netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'. IPVS: ftp: loaded support on port[0] = 21 netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor.2'. IPVS: ftp: loaded support on port[0] = 21 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'.