Warning: Permanently added '10.128.0.203' (ECDSA) to the list of known hosts. 2020/03/05 11:26:58 parsed 1 programs 2020/03/05 11:27:00 executed programs: 0 syzkaller login: [ 66.492022][ T8927] IPVS: ftp: loaded support on port[0] = 21 [ 66.538944][ T8927] chnl_net:caif_netlink_parms(): no params data found [ 66.571194][ T8927] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.578466][ T8927] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.586213][ T8927] device bridge_slave_0 entered promiscuous mode [ 66.594209][ T8927] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.601468][ T8927] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.609027][ T8927] device bridge_slave_1 entered promiscuous mode [ 66.625032][ T8927] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 66.635602][ T8927] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 66.652737][ T8927] team0: Port device team_slave_0 added [ 66.659593][ T8927] team0: Port device team_slave_1 added [ 66.671959][ T8927] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 66.678884][ T8927] batman_adv: batadv0: The MTU of interface batadv_slave_0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 66.705068][ T8927] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 66.717140][ T8927] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 66.724199][ T8927] batman_adv: batadv0: The MTU of interface batadv_slave_1 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. [ 66.750106][ T8927] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 66.812019][ T8927] device hsr_slave_0 entered promiscuous mode [ 66.850054][ T8927] device hsr_slave_1 entered promiscuous mode [ 66.940157][ T8927] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 66.982542][ T8927] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 67.032433][ T8927] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 67.091991][ T8927] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 67.143515][ T8927] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.150705][ T8927] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.158175][ T8927] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.165294][ T8927] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.202228][ T8927] 8021q: adding VLAN 0 to HW filter on device bond0 [ 67.214484][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 67.225289][ T2843] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.233204][ T2843] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.240997][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 67.254832][ T8927] 8021q: adding VLAN 0 to HW filter on device team0 [ 67.264439][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 67.273559][ T2774] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.280651][ T2774] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.301809][ T2856] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 67.310487][ T2856] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.317540][ T2856] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.325651][ T2856] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 67.335316][ T2856] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 67.344374][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 67.354462][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 67.367752][ T8927] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 67.379330][ T8927] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 67.388218][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 67.405474][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 67.413295][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 67.424635][ T8927] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 67.441657][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 67.461082][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 67.469120][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 67.477693][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 67.486404][ T8927] device veth0_vlan entered promiscuous mode [ 67.498224][ T8927] device veth1_vlan entered promiscuous mode [ 67.516810][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 67.525380][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 67.534106][ T2843] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 67.545774][ T8927] device veth0_macvtap entered promiscuous mode [ 67.555894][ T8927] device veth1_macvtap entered promiscuous mode [ 67.570407][ T8927] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 67.577924][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 67.587511][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 67.598708][ T8927] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 67.606965][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 67.616257][ T2774] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 67.858572][ T8934] [ 67.860935][ T8934] ====================================================== [ 67.867960][ T8934] WARNING: possible circular locking dependency detected [ 67.876093][ T8934] 5.6.0-rc3-syzkaller #0 Not tainted [ 67.881350][ T8934] ------------------------------------------------------ [ 67.888339][ T8934] syz-executor.0/8934 is trying to acquire lock: [ 67.894639][ T8934] ffff88808ce822a0 (&tty->termios_rwsem){++++}, at: n_tty_receive_buf_common+0x8b/0x30b0 [ 67.904418][ T8934] [ 67.904418][ T8934] but task is already holding lock: [ 67.911754][ T8934] ffffffff89462eb0 (sel_lock){+.+.}, at: paste_selection+0x118/0x470 [ 67.919815][ T8934] [ 67.919815][ T8934] which lock already depends on the new lock. [ 67.919815][ T8934] [ 67.930209][ T8934] [ 67.930209][ T8934] the existing dependency chain (in reverse order) is: [ 67.939203][ T8934] [ 67.939203][ T8934] -> #2 (sel_lock){+.+.}: [ 67.945682][ T8934] lock_acquire+0x154/0x250 [ 67.950680][ T8934] __mutex_lock_common+0x16e/0x2f30 [ 67.956370][ T8934] mutex_lock_nested+0x1b/0x30 [ 67.961633][ T8934] set_selection_kernel+0x3b8/0x18a0 [ 67.967417][ T8934] set_selection_user+0x63/0x80 [ 67.972777][ T8934] tioclinux+0x103/0x530 [ 67.977523][ T8934] vt_ioctl+0x3f1/0x3a30 [ 67.982262][ T8934] tty_ioctl+0xee6/0x15c0 [ 67.987082][ T8934] __se_sys_ioctl+0x113/0x190 [ 67.992250][ T8934] __x64_sys_ioctl+0x7b/0x90 [ 67.997330][ T8934] do_syscall_64+0xf7/0x1c0 [ 68.002326][ T8934] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.008748][ T8934] [ 68.008748][ T8934] -> #1 (console_lock){+.+.}: [ 68.015572][ T8934] lock_acquire+0x154/0x250 [ 68.020566][ T8934] console_lock+0x46/0x70 [ 68.025384][ T8934] con_flush_chars+0x50/0x650 [ 68.030553][ T8934] n_tty_write+0xeae/0x1200 [ 68.035544][ T8934] tty_write+0x5a1/0x950 [ 68.040285][ T8934] __vfs_write+0xb8/0x740 [ 68.045106][ T8934] vfs_write+0x270/0x580 [ 68.049843][ T8934] ksys_write+0x117/0x220 [ 68.054673][ T8934] __x64_sys_write+0x7b/0x90 [ 68.059761][ T8934] do_syscall_64+0xf7/0x1c0 [ 68.064759][ T8934] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.071160][ T8934] [ 68.071160][ T8934] -> #0 (&tty->termios_rwsem){++++}: [ 68.078595][ T8934] validate_chain+0x1507/0x7be0 [ 68.083938][ T8934] __lock_acquire+0xc5a/0x1bc0 [ 68.089193][ T8934] lock_acquire+0x154/0x250 [ 68.094194][ T8934] down_read+0x39/0x50 [ 68.098755][ T8934] n_tty_receive_buf_common+0x8b/0x30b0 [ 68.104797][ T8934] n_tty_receive_buf2+0x33/0x40 [ 68.110149][ T8934] tty_ldisc_receive_buf+0x9f/0x170 [ 68.115839][ T8934] paste_selection+0x346/0x470 [ 68.121094][ T8934] tioclinux+0x121/0x530 [ 68.125837][ T8934] vt_ioctl+0x3f1/0x3a30 [ 68.130570][ T8934] tty_ioctl+0xee6/0x15c0 [ 68.135390][ T8934] __se_sys_ioctl+0x113/0x190 [ 68.140558][ T8934] __x64_sys_ioctl+0x7b/0x90 [ 68.145653][ T8934] do_syscall_64+0xf7/0x1c0 [ 68.150650][ T8934] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.157038][ T8934] [ 68.157038][ T8934] other info that might help us debug this: [ 68.157038][ T8934] [ 68.167253][ T8934] Chain exists of: [ 68.167253][ T8934] &tty->termios_rwsem --> console_lock --> sel_lock [ 68.167253][ T8934] [ 68.179723][ T8934] Possible unsafe locking scenario: [ 68.179723][ T8934] [ 68.187149][ T8934] CPU0 CPU1 [ 68.192495][ T8934] ---- ---- [ 68.197843][ T8934] lock(sel_lock); [ 68.201621][ T8934] lock(console_lock); [ 68.208273][ T8934] lock(sel_lock); [ 68.214574][ T8934] lock(&tty->termios_rwsem); [ 68.219305][ T8934] [ 68.219305][ T8934] *** DEADLOCK *** [ 68.219305][ T8934] [ 68.227511][ T8934] 3 locks held by syz-executor.0/8934: [ 68.232952][ T8934] #0: ffff88808ce82090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x25/0x70 [ 68.242127][ T8934] #1: ffff88809f8cc0a8 (&buf->lock){+.+.}, at: tty_buffer_lock_exclusive+0x33/0x40 [ 68.251907][ T8934] #2: ffffffff89462eb0 (sel_lock){+.+.}, at: paste_selection+0x118/0x470 [ 68.260385][ T8934] [ 68.260385][ T8934] stack backtrace: [ 68.266250][ T8934] CPU: 0 PID: 8934 Comm: syz-executor.0 Not tainted 5.6.0-rc3-syzkaller #0 [ 68.274799][ T8934] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.284842][ T8934] Call Trace: [ 68.288109][ T8934] dump_stack+0x1fb/0x318 [ 68.292412][ T8934] print_circular_bug+0xc3f/0xe70 [ 68.297407][ T8934] ? stack_trace_save+0xb1/0x150 [ 68.302317][ T8934] ? save_trace+0x4b/0x9f0 [ 68.306708][ T8934] check_noncircular+0x206/0x3a0 [ 68.311622][ T8934] validate_chain+0x1507/0x7be0 [ 68.316448][ T8934] ? __kasan_check_read+0x11/0x20 [ 68.321457][ T8934] ? mark_lock+0x107/0x1650 [ 68.325948][ T8934] __lock_acquire+0xc5a/0x1bc0 [ 68.330721][ T8934] ? mark_lock+0x67a/0x1650 [ 68.335225][ T8934] ? trace_lock_acquire+0x15b/0x1d0 [ 68.340398][ T8934] lock_acquire+0x154/0x250 [ 68.344875][ T8934] ? n_tty_receive_buf_common+0x8b/0x30b0 [ 68.350584][ T8934] down_read+0x39/0x50 [ 68.354628][ T8934] ? n_tty_receive_buf_common+0x8b/0x30b0 [ 68.360317][ T8934] n_tty_receive_buf_common+0x8b/0x30b0 [ 68.365836][ T8934] ? trace_lock_acquire+0x15b/0x1d0 [ 68.371009][ T8934] ? lock_acquire+0x154/0x250 [ 68.375659][ T8934] ? paste_selection+0x118/0x470 [ 68.380580][ T8934] ? __mutex_lock_common+0x53d/0x2f30 [ 68.385939][ T8934] ? paste_selection+0x118/0x470 [ 68.390850][ T8934] ? lockdep_hardirqs_on+0x4a5/0x7a0 [ 68.396103][ T8934] ? _raw_spin_unlock_irqrestore+0x72/0xe0 [ 68.401887][ T8934] n_tty_receive_buf2+0x33/0x40 [ 68.406715][ T8934] ? n_tty_write_wakeup+0x50/0x50 [ 68.411716][ T8934] tty_ldisc_receive_buf+0x9f/0x170 [ 68.416890][ T8934] paste_selection+0x346/0x470 [ 68.421665][ T8934] ? do_task_dead+0xc0/0xc0 [ 68.426149][ T8934] tioclinux+0x121/0x530 [ 68.430364][ T8934] vt_ioctl+0x3f1/0x3a30 [ 68.434593][ T8934] ? rcu_lock_release+0x9/0x30 [ 68.439331][ T8934] ? tomoyo_path_number_perm+0x58f/0x690 [ 68.444941][ T8934] ? tty_jobctrl_ioctl+0x1ea/0xc00 [ 68.450037][ T8934] tty_ioctl+0xee6/0x15c0 [ 68.454360][ T8934] ? tomoyo_file_ioctl+0x23/0x30 [ 68.459270][ T8934] ? tty_do_resize+0x180/0x180 [ 68.464010][ T8934] __se_sys_ioctl+0x113/0x190 [ 68.468659][ T8934] __x64_sys_ioctl+0x7b/0x90 [ 68.473222][ T8934] do_syscall_64+0xf7/0x1c0 [ 68.477814][ T8934] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.483685][ T8934] RIP: 0033:0x45c479 [ 68.487549][ T8934] Code: ad b6 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 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 68.507126][ T8934] RSP: 002b:00007fa0ef62ec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.515521][ T8934] RAX: ffffffffffffffda RBX: 00007fa0ef62f6d4 RCX: 000000000045c479 [ 68.523473][ T8934] RDX: 0000000020000040 RSI: 000000000000541c RDI: 0000000000000003 [ 68.531443][ T8934] RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 [ 68.539393][ T8934] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 68.547339][ T8934] R13: 0000000000000574 R14: 00000000004c7c8f R15: 000000000076bf2c