ip_tables: iptables: counters copy to user failed while replacing table IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready ====================================================== WARNING: possible circular locking dependency detected 4.14.222-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/20425 is trying to acquire lock: (&table[i].mutex){+.+.}, at: [] ip_set_nfnl_put+0x11a/0x310 net/netfilter/ipset/ip_set_core.c:732 but task is already holding lock: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1092 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&xt[i].mutex){+.+.}: __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 -> #0 (&table[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 ip_set_nfnl_put+0x11a/0x310 net/netfilter/ipset/ip_set_core.c:732 set_target_v0_destroy+0xd7/0x150 net/netfilter/xt_set.c:323 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 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&xt[i].mutex); lock(&table[i].mutex); lock(&xt[i].mutex); lock(&table[i].mutex); *** DEADLOCK *** 1 lock held by syz-executor.3/20425: #0: (&xt[i].mutex){+.+.}, at: [] xt_find_table_lock+0x38/0x3d0 net/netfilter/x_tables.c:1092 stack backtrace: CPU: 0 PID: 20425 Comm: syz-executor.3 Not tainted 4.14.222-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 ip_set_nfnl_put+0x11a/0x310 net/netfilter/ipset/ip_set_core.c:732 set_target_v0_destroy+0xd7/0x150 net/netfilter/xt_set.c:323 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 RIP: 0033:0x465ef9 RSP: 002b:00007ffaa6109188 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000003 RBP: 00000000004bcd1c R08: 00000000000003a0 R09: 0000000000000000 R10: 0000000020000480 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffdef1d651f R14: 00007ffaa6109300 R15: 0000000000022000 Bluetooth: hci2 command 0x0419 tx timeout IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready ip_tables: iptables: counters copy to user failed while replacing table IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready audit: type=1804 audit(1614193945.565:108): pid=20452 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/155/file0" dev="sda1" ino=15962 res=1 overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPVS: ftp: loaded support on port[0] = 21 overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1614193946.465:109): pid=20626 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/156/file0" dev="sda1" ino=16291 res=1 overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. IPVS: ftp: loaded support on port[0] = 21 overlayfs: unrecognized mount option "lmwerdirF" or missing value overlayfs: unrecognized mount option "lmwerdirF" or missing value overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1614193947.215:110): pid=20612 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/156/file0" dev="sda1" ino=16291 res=1 audit: type=1804 audit(1614193947.365:111): pid=20764 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/157/file0" dev="sda1" ino=16748 res=1 IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1614193947.395:112): pid=20749 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/157/file0" dev="sda1" ino=16748 res=1 overlayfs: unrecognized mount option "lowerdir5./bus" or missing value Bluetooth: hci4 command 0x0406 tx timeout overlayfs: unrecognized mount option "lowerdir5./bus" or missing value IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1614193947.745:113): pid=20827 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/158/file0" dev="sda1" ino=16758 res=1 overlayfs: failed to resolve './file0': -2 overlayfs: failed to resolve './file0': -2 audit: type=1804 audit(1614193947.785:114): pid=20791 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/158/file0" dev="sda1" ino=16758 res=1 overlayfs: failed to resolve './file1': -2 overlayfs: failed to resolve './file1': -2 overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. overlayfs: unrecognized mount option "xino=auto" or missing value overlayfs: unrecognized mount option "xino=auto" or missing value overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. IPVS: ftp: loaded support on port[0] = 21 kauditd_printk_skb: 5 callbacks suppressed audit: type=1804 audit(1614193948.985:120): pid=20874 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/159/file0" dev="sda1" ino=16762 res=1 audit: type=1804 audit(1614193948.985:121): pid=20888 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/159/file0" dev="sda1" ino=16762 res=1 audit: type=1804 audit(1614193949.035:122): pid=20888 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/159/file0" dev="sda1" ino=16762 res=1 IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1614193949.035:123): pid=20874 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/159/file0" dev="sda1" ino=16762 res=1 encrypted_key: insufficient parameters specified audit: type=1804 audit(1614193949.195:124): pid=20981 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/160/file0" dev="sda1" ino=16784 res=1 encrypted_key: insufficient parameters specified nla_parse: 5 callbacks suppressed netlink: 8 bytes leftover after parsing attributes in process `syz-executor.1'. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. overlayfs: filesystem on './bus' not supported as upperdir audit: type=1804 audit(1614193949.955:125): pid=20981 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/160/file0" dev="sda1" ino=16784 res=1 audit: type=1804 audit(1614193949.955:126): pid=20981 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/160/file0" dev="sda1" ino=16784 res=1 IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1614193949.955:127): pid=20968 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/160/file0" dev="sda1" ino=16784 res=1 overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. audit: type=1804 audit(1614193950.085:128): pid=21071 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/161/file0" dev="sda1" ino=16792 res=1 audit: type=1804 audit(1614193950.085:129): pid=21056 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/161/file0" dev="sda1" ino=16792 res=1 IPVS: ftp: loaded support on port[0] = 21 overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. overlayfs: unrecognized mount option "lowerdis" or missing value overlayfs: unrecognized mount option "lowerdis" or missing value IPVS: ftp: loaded support on port[0] = 21 overlayfs: missing 'workdir' overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. overlayfs: missing 'workdir' netlink: 8 bytes leftover after parsing attributes in process `syz-executor.4'. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready overlayfs: unrecognized mount option "lowertir=./b=./file1" or missing value IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready overlayfs: unrecognized mount option "lowertir=./b=./file1" or missing value IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready overlayfs: unrecognized mount option ""8ØA2./file1" or missing value overlayfs: unrecognized mount option ""8ØA2./file1" or missing value IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPVS: ftp: loaded support on port[0] = 21 overlayfs: upperdir is in-use by another mount, mount with '-o index=off' to override exclusive upperdir protection. kauditd_printk_skb: 20 callbacks suppressed audit: type=1804 audit(1614193954.565:150): pid=21584 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/169/file0" dev="sda1" ino=16824 res=1 audit: type=1804 audit(1614193954.595:151): pid=21584 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/169/file0" dev="sda1" ino=16824 res=1 overlayfs: unrecognized mount option "wor"çir=./file1" or missing value audit: type=1804 audit(1614193954.635:152): pid=21584 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/169/file0" dev="sda1" ino=16824 res=1 overlayfs: unrecognized mount option "wor"çir=./file1" or missing value audit: type=1804 audit(1614193954.635:153): pid=21592 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.4" name="/root/syzkaller-testdir739733095/syzkaller.D4Uxpx/169/file0" dev="sda1" ino=16824 res=1