[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.030398] kauditd_printk_skb: 7 callbacks suppressed [ 29.030410] audit: type=1800 audit(1544074399.110:29): pid=5880 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 29.061730] audit: type=1800 audit(1544074399.110:30): pid=5880 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.52' (ECDSA) to the list of known hosts. 2018/12/06 05:33:28 parsed 1 programs 2018/12/06 05:33:30 executed programs: 0 syzkaller login: [ 40.627287] IPVS: ftp: loaded support on port[0] = 21 [ 40.630783] IPVS: ftp: loaded support on port[0] = 21 [ 40.663818] IPVS: ftp: loaded support on port[0] = 21 [ 40.689914] IPVS: ftp: loaded support on port[0] = 21 [ 40.691167] IPVS: ftp: loaded support on port[0] = 21 [ 40.720343] IPVS: ftp: loaded support on port[0] = 21 [ 41.648816] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.655719] bridge0: port 1(bridge_slave_0) entered disabled state [ 41.681728] device bridge_slave_0 entered promiscuous mode [ 41.762089] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.791657] bridge0: port 2(bridge_slave_1) entered disabled state [ 41.799218] device bridge_slave_1 entered promiscuous mode [ 41.817244] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.831671] bridge0: port 1(bridge_slave_0) entered disabled state [ 41.839050] device bridge_slave_0 entered promiscuous mode [ 41.856662] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.868686] bridge0: port 1(bridge_slave_0) entered disabled state [ 41.883173] device bridge_slave_0 entered promiscuous mode [ 41.891626] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 41.911745] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.920543] bridge0: port 1(bridge_slave_0) entered disabled state [ 41.927941] device bridge_slave_0 entered promiscuous mode [ 41.958282] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.964687] bridge0: port 2(bridge_slave_1) entered disabled state [ 41.974857] device bridge_slave_1 entered promiscuous mode [ 41.982006] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.001935] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.009656] device bridge_slave_1 entered promiscuous mode [ 42.018368] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.024742] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.036752] device bridge_slave_1 entered promiscuous mode [ 42.044968] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.055918] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.065884] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.076687] device bridge_slave_0 entered promiscuous mode [ 42.086271] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.095929] bridge0: port 1(bridge_slave_0) entered blocking state [ 42.109606] bridge0: port 1(bridge_slave_0) entered disabled state [ 42.118045] device bridge_slave_0 entered promiscuous mode [ 42.125795] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.139590] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.157728] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.175604] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.184736] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.201039] device bridge_slave_1 entered promiscuous mode [ 42.209393] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.243413] bridge0: port 2(bridge_slave_1) entered blocking state [ 42.253964] bridge0: port 2(bridge_slave_1) entered disabled state [ 42.267537] device bridge_slave_1 entered promiscuous mode [ 42.277212] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.311607] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.359114] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.368284] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 42.386578] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.401365] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.420140] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.445428] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 42.466071] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.501434] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.515542] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.533187] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.543305] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 42.562413] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 42.591166] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 42.598010] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 42.611797] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.636057] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 42.649810] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 42.664838] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 42.680246] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 42.690387] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 42.709115] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.733587] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 42.757993] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 42.799137] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.821470] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 42.922710] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 42.940984] team0: Port device team_slave_0 added [ 42.967661] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 42.979204] team0: Port device team_slave_0 added [ 42.986493] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.001982] team0: Port device team_slave_0 added [ 43.030627] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.041697] team0: Port device team_slave_1 added [ 43.069475] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.078961] team0: Port device team_slave_0 added [ 43.084972] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.095479] team0: Port device team_slave_1 added [ 43.108308] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.124292] team0: Port device team_slave_1 added [ 43.161940] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.175817] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.188876] team0: Port device team_slave_1 added [ 43.217617] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.229607] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.242218] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.249614] team0: Port device team_slave_0 added [ 43.256557] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 43.265014] team0: Port device team_slave_0 added [ 43.279877] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.298720] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.311857] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.334417] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.347788] team0: Port device team_slave_1 added [ 43.355562] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.366427] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 43.375205] team0: Port device team_slave_1 added [ 43.382584] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.396423] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.404781] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.414348] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 43.424588] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.433077] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.449309] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.460110] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.469776] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 43.478210] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 43.486119] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.499613] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.514411] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.525742] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.533610] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.541322] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 43.549158] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 43.556823] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 43.564858] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 43.572653] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 43.580308] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.590939] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 43.600344] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.620986] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.628676] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 43.637677] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 43.661977] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.670923] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.680804] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 43.689128] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 43.698932] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 43.706946] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 43.718846] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.728781] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 43.741106] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.754706] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 43.772533] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 43.799029] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 43.807006] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 43.817239] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.828676] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 43.848190] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.868640] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.888541] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 43.897566] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 43.911686] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.929452] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 43.937108] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 43.954573] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 43.969594] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 43.977555] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 44.495766] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.502305] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.509355] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.515730] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.531551] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 44.550418] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.556776] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.563483] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.569892] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.588343] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 44.594725] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.601130] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.607803] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.614255] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.626173] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 44.652036] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.658441] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.665097] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.671559] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.681033] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 44.745062] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.751484] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.758209] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.764575] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.774971] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 44.870547] bridge0: port 2(bridge_slave_1) entered blocking state [ 44.876942] bridge0: port 2(bridge_slave_1) entered forwarding state [ 44.883662] bridge0: port 1(bridge_slave_0) entered blocking state [ 44.890083] bridge0: port 1(bridge_slave_0) entered forwarding state [ 44.898953] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 45.408200] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 45.416360] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 45.431464] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 45.451295] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 45.459360] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 45.466765] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 47.491320] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.504116] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.524664] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.580608] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.622113] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.743982] 8021q: adding VLAN 0 to HW filter on device bond0 [ 47.751397] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 47.764101] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 47.781751] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 47.856205] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 47.889266] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 48.027783] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.043924] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 48.054046] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.063627] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.074722] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.090449] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.104766] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.116567] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.126340] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.134241] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.151550] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.158065] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.192568] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.215093] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.241596] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.257880] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.359454] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.371298] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.392349] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 48.398772] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 48.405841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 48.418991] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.429888] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.498849] 8021q: adding VLAN 0 to HW filter on device team0 [ 48.629797] 8021q: adding VLAN 0 to HW filter on device team0 2018/12/06 05:33:40 executed programs: 6 [ 50.261633] kasan: CONFIG_KASAN_INLINE enabled [ 50.278372] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 50.347780] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 50.354055] CPU: 0 PID: 7611 Comm: syz-executor1 Not tainted 4.20.0-rc5+ #142 [ 50.361330] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.370715] RIP: 0010:n_tty_set_termios+0x2d9/0xe80 [ 50.375760] Code: 45 d0 31 ff 83 e0 02 89 c6 89 45 d0 e8 50 82 a3 fd 8b 45 d0 4c 89 f1 48 ba 00 00 00 00 00 fc ff df 85 c0 0f 95 c0 48 c1 e9 03 <0f> b6 14 11 4c 89 f1 83 e1 07 38 ca 7f 08 84 d2 0f 85 96 09 00 00 [ 50.394663] RSP: 0018:ffff8881b8887578 EFLAGS: 00010203 [ 50.396163] kobject: 'loop4' (000000009793eee5): kobject_uevent_env [ 50.400029] RAX: 0000000000000001 RBX: 0000000000000000 RCX: 000000000000000b [ 50.400038] RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000005 [ 50.400046] RBP: ffff8881b88875b0 R08: ffff8881cc24e100 R09: 0000000000000008 [ 50.400059] R10: 0000000000000050 R11: ffff8881cc24e100 R12: ffff8881bd3d23c0 [ 50.408904] kobject: 'loop4' (000000009793eee5): fill_kobj_path: path = '/devices/virtual/block/loop4' [ 50.413717] R13: ffff8881bd3d2774 R14: 000000000000005d R15: ffff8881b8887610 [ 50.413729] FS: 00007f0a12813700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 [ 50.413745] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 50.466249] CR2: 000000000070a6b4 CR3: 00000001b2577000 CR4: 00000000001406f0 [ 50.473503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 50.480755] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 50.488012] Call Trace: [ 50.490609] ? n_tty_receive_signal_char+0x120/0x120 [ 50.495719] tty_set_termios+0x7a0/0xac0 [ 50.499797] ? tty_wait_until_sent+0x5d0/0x5d0 [ 50.500316] ------------[ cut here ]------------ [ 50.504391] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 50.509125] downgrading a read lock [ 50.509236] WARNING: CPU: 1 PID: 7629 at kernel/locking/lockdep.c:3556 lock_downgrade+0x4d7/0x900 [ 50.514666] set_termios+0x41e/0x7d0 [ 50.518274] Kernel panic - not syncing: panic_on_warn set ... [ 50.527277] ? tty_perform_flush+0x80/0x80 [ 50.541064] ? drop_futex_key_refs.isra.14+0x6d/0xe0 [ 50.546180] tty_mode_ioctl+0x857/0xb40 [ 50.550163] ? set_termios+0x7d0/0x7d0 [ 50.554061] ? perf_trace_sched_process_exec+0x860/0x860 [ 50.559520] n_tty_ioctl_helper+0x54/0x3b0 [ 50.563755] n_tty_ioctl+0x54/0x360 [ 50.567386] ? ldsem_down_read+0x32/0x40 [ 50.571444] ? ldsem_down_read+0x32/0x40 [ 50.575502] tty_ioctl+0x5c6/0x17d0 [ 50.579129] ? commit_echoes+0x1c0/0x1c0 [ 50.583198] ? tty_vhangup+0x30/0x30 [ 50.586935] ? find_held_lock+0x36/0x1c0 [ 50.591001] ? __fget+0x4aa/0x740 [ 50.594453] ? lock_downgrade+0x900/0x900 [ 50.598603] ? check_preemption_disabled+0x48/0x280 [ 50.603624] ? rcu_read_unlock_special+0x1c0/0x1c0 [ 50.608551] ? kasan_check_read+0x11/0x20 [ 50.612702] ? rcu_dynticks_curr_cpu_in_eqs+0xa2/0x170 [ 50.617977] ? rcu_softirq_qs+0x20/0x20 [ 50.621957] ? __fget+0x4d1/0x740 [ 50.625416] ? ksys_dup3+0x680/0x680 [ 50.629132] ? __might_fault+0x12b/0x1e0 [ 50.633201] ? lock_downgrade+0x900/0x900 [ 50.637352] ? lock_release+0xa00/0xa00 [ 50.641323] ? perf_trace_sched_process_exec+0x860/0x860 [ 50.646775] ? tty_vhangup+0x30/0x30 [ 50.650490] do_vfs_ioctl+0x1de/0x1790 [ 50.654378] ? ioctl_preallocate+0x300/0x300 [ 50.658787] ? memset+0x31/0x40 [ 50.662066] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.667604] ? smack_file_ioctl+0x210/0x3c0 [ 50.671921] ? fget_raw+0x20/0x20 [ 50.675373] ? smack_file_lock+0x2e0/0x2e0 [ 50.679614] ? do_syscall_64+0x9a/0x820 [ 50.683590] ? do_syscall_64+0x9a/0x820 [ 50.687568] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.693106] ? security_file_ioctl+0x94/0xc0 [ 50.697514] ksys_ioctl+0xa9/0xd0 [ 50.700988] __x64_sys_ioctl+0x73/0xb0 [ 50.704887] do_syscall_64+0x1b9/0x820 [ 50.708781] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 50.714143] ? syscall_return_slowpath+0x5e0/0x5e0 [ 50.719086] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.723930] ? trace_hardirqs_on_caller+0x310/0x310 [ 50.728948] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 50.733963] ? prepare_exit_to_usermode+0x291/0x3b0 [ 50.738984] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 50.743829] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 50.749013] RIP: 0033:0x457569 [ 50.752208] Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 50.771109] RSP: 002b:00007f0a12812c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 50.778826] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 [ 50.786095] RDX: 0000000020000000 RSI: 0000000000005402 RDI: 0000000000000005 [ 50.793361] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 50.800628] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0a128136d4 [ 50.807895] R13: 00000000004c10be R14: 00000000004d2270 R15: 00000000ffffffff [ 50.815183] Modules linked in: [ 50.819331] Kernel Offset: disabled [ 50.822952] Rebooting in 86400 seconds..