====================================================== WARNING: possible circular locking dependency detected 4.14.284-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/13611 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] unregister_netdev+0x18/0x20 net/core/dev.c:8315 slip_close+0x150/0x1b0 drivers/net/slip/slip.c:912 tty_ldisc_close+0x8c/0xc0 drivers/tty/tty_ldisc.c:505 tty_ldisc_kill drivers/tty/tty_ldisc.c:651 [inline] tty_ldisc_release+0xe8/0x400 drivers/tty/tty_ldisc.c:818 tty_release_struct+0x20/0xe0 drivers/tty/tty_io.c:1603 tty_release+0xb3f/0x10d0 drivers/tty/tty_io.c:1776 __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 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 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.2/13611: #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: 13611 Comm: syz-executor.2 Not tainted 4.14.284-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 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 RIP: 0033:0x7f0856292109 RSP: 002b:00007f0854c07168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f08563a4f60 RCX: 00007f0856292109 RDX: 00000000000000c0 RSI: 0000000020000540 RDI: 0000000000000003 RBP: 00007f08562ec05d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd8329638f R14: 00007f0854c07300 R15: 0000000000022000 ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' ieee80211 phy2: hwaddr 02:00:00:00:02:00 registered ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' ====================================================== WARNING: the mand mount option is being deprecated and will be removed in v5.15! ====================================================== netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. ieee80211 phy3: hwaddr 02:00:00:00:03:00 registered device bond2 entered promiscuous mode device batadv1 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device batadv1 bond2: Enslaving batadv1 as an active interface with an up link bond2 (unregistering): Releasing backup interface batadv1 bond2 (unregistering): Released all slaves Bluetooth: hci1 command 0x0406 tx timeout Bluetooth: hci3 command 0x0406 tx timeout Bluetooth: hci2 command 0x0406 tx timeout Bluetooth: hci5 command 0x0406 tx timeout Bluetooth: hci0 command 0x0406 tx timeout Bluetooth: hci4 command 0x0406 tx timeout base_sock_release(ffff888059fcf480) sk= (null) netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. base_sock_release(ffff888059fcf900) sk=ffff888093466980 base_sock_release(ffff888059fe4540) sk= (null) base_sock_release(ffff888059fe49c0) sk=ffff888068338280 device bond2 entered promiscuous mode base_sock_release(ffff888059fd3640) sk= (null) netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. base_sock_release(ffff888059fd3ac0) sk=ffff888091626b80 base_sock_release(ffff88806dc4ea40) sk= (null) device bond1 entered promiscuous mode device batadv2 entered promiscuous mode base_sock_release(ffff88806dc49100) sk=ffff888067c22e00 8021q: adding VLAN 0 to HW filter on device batadv2 bond2: Enslaving batadv2 as an active interface with an up link device batadv1 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device batadv1 bond1: Enslaving batadv1 as an active interface with an up link ieee80211 phy4: Selected rate control algorithm 'minstrel_ht' ieee80211 phy4: hwaddr 02:00:00:00:04:00 registered bond1 (unregistering): Releasing backup interface batadv1 bond1 (unregistering): Released all slaves bond2 (unregistering): Releasing backup interface batadv2 bond2 (unregistering): Released all slaves netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. device bond2 entered promiscuous mode netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. device bond1 entered promiscuous mode device batadv3 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device batadv3 bond2: Enslaving batadv3 as an active interface with an up link device batadv2 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device batadv2 bond1: Enslaving batadv2 as an active interface with an up link bond1 (unregistering): Releasing backup interface batadv2 bond1 (unregistering): Released all slaves bond2 (unregistering): Releasing backup interface batadv3 bond2 (unregistering): Released all slaves ieee80211 phy5: Selected rate control algorithm 'minstrel_ht' netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. ieee80211 phy5: hwaddr 02:00:00:00:05:00 registered device bond1 entered promiscuous mode device batadv1 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device batadv1 bond1: Enslaving batadv1 as an active interface with an up link Y4`Ҙ: renamed from lo bond1 (unregistering): Releasing backup interface batadv1 bond1 (unregistering): Released all slaves netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. device bond1 entered promiscuous mode netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. device bond2 entered promiscuous mode netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. device bond1 entered promiscuous mode device batadv3 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device batadv3 bond1: Enslaving batadv3 as an active interface with an up link device batadv4 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device batadv4 bond2: Enslaving batadv4 as an active interface with an up link device batadv2 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device batadv2 bond1: Enslaving batadv2 as an active interface with an up link bond2 (unregistering): Releasing backup interface batadv4 bond2 (unregistering): Released all slaves bond1 (unregistering): Releasing backup interface batadv3 bond1 (unregistering): Released all slaves bond1 (unregistering): Releasing backup interface batadv2 bond1 (unregistering): Released all slaves device lo entered promiscuous mode netlink: 12 bytes leftover after parsing attributes in process `syz-executor.1'. device bond1 entered promiscuous mode Y4`Ҙ: renamed from lo device lo entered promiscuous mode device batadv3 entered promiscuous mode 8021q: adding VLAN 0 to HW filter on device batadv3 bond1: Enslaving batadv3 as an active interface with an up link device lo entered promiscuous mode Y4`Ҙ: renamed from lo Y4`Ҙ: renamed from lo bond1 (unregistering): Releasing backup interface batadv3 bond1 (unregistering): Released all slaves audit: type=1800 audit(1656076884.624:76): pid=14529 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14525 res=0 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. 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 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. 8021q: adding VLAN 0 to HW filter on device team0 overlayfs: fs on './file0' does not support file handles, falling back to index=off. 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 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. device team0 left promiscuous mode device team_slave_0 left promiscuous mode device team_slave_1 left promiscuous mode overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. bridge0: port 3(team0) entered disabled state overlayfs: fs on './file0' does not support file handles, falling back to index=off. 8021q: adding VLAN 0 to HW filter on device team0 overlayfs: fs on './file0' does not support file handles, falling back to index=off. 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 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. audit: type=1800 audit(1656076885.724:77): pid=14585 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14003 res=0 overlayfs: fs on './file0' does not support file handles, falling back to index=off. 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 audit: type=1800 audit(1656076886.344:78): pid=14599 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="sda1" ino=13925 res=0 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 audit: type=1800 audit(1656076886.734:79): pid=14609 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="bus" dev="sda1" ino=14100 res=0 device team_slave_1 left promiscuous mode bridge0: port 3(team0) entered disabled state audit: type=1800 audit(1656076886.974:80): pid=14613 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="bus" dev="sda1" ino=14114 res=0 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 audit: type=1800 audit(1656076887.384:81): pid=14617 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=14019 res=0 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. audit: type=1800 audit(1656076887.995:82): pid=14636 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.0" name="bus" dev="sda1" ino=13892 res=0 overlayfs: fs on 'file0' does not support file handles, falling back to index=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. audit: type=1800 audit(1656076888.135:83): pid=14640 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.1" name="bus" dev="sda1" ino=13972 res=0 overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: fs on 'file0' does not support file handles, falling back to index=off. audit: type=1800 audit(1656076888.285:84): pid=14650 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name="bus" dev="sda1" ino=13927 res=0 overlayfs: fs on './file0' does not support file handles, falling back to index=off. batman_adv: batadv0: adding TT local entry ba:0e:72:00:ff:ff to non-existent VLAN 1280 batman_adv: batadv0: adding TT local entry ba:0e:72:00:ff:ff to non-existent VLAN 1280 batman_adv: batadv0: adding TT local entry ba:0e:72:00:ff:ff to non-existent VLAN 1280 batman_adv: batadv0: adding TT local entry ba:0e:72:00:ff:ff to non-existent VLAN 1280 batman_adv: batadv0: adding TT local entry ba:0e:72:00:ff:ff to non-existent VLAN 1280 batman_adv: batadv0: adding TT local entry ba:0e:72:00:ff:ff to non-existent VLAN 1280 batman_adv: batadv0: adding TT local entry ba:0e:72:00:ff:ff to non-existent VLAN 1280 batman_adv: batadv0: adding TT local entry ba:0e:72:00:ff:ff to non-existent VLAN 1280 batman_adv: batadv0: adding TT local entry ba:0e:72:00:ff:ff to non-existent VLAN 1280 batman_adv: batadv0: adding TT local entry ba:0e:72:00:ff:ff to non-existent VLAN 1280 audit: type=1800 audit(1656076888.745:85): pid=14671 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="sda1" ino=13926 res=0