[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.152' (ECDSA) to the list of known hosts. syzkaller login: [ 28.132154] IPVS: ftp: loaded support on port[0] = 21 [ 28.200653] chnl_net:caif_netlink_parms(): no params data found [ 28.292267] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.299333] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.306831] device bridge_slave_0 entered promiscuous mode [ 28.314360] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.320746] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.328041] device bridge_slave_1 entered promiscuous mode [ 28.343897] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 28.352585] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 28.370078] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 28.377265] team0: Port device team_slave_0 added [ 28.382562] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 28.389998] team0: Port device team_slave_1 added [ 28.404013] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 28.410245] 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. [ 28.435717] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 28.446887] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 28.453113] 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. [ 28.478342] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 28.488845] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 28.496343] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 28.514469] device hsr_slave_0 entered promiscuous mode [ 28.520053] device hsr_slave_1 entered promiscuous mode [ 28.526143] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_0: link is not ready [ 28.533090] IPv6: ADDRCONF(NETDEV_UP): hsr_slave_1: link is not ready [ 28.590782] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.597205] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.604057] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.610406] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.637750] IPv6: ADDRCONF(NETDEV_UP): bond0: link is not ready [ 28.644630] 8021q: adding VLAN 0 to HW filter on device bond0 [ 28.652233] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 28.661841] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 28.680302] bridge0: port 1(bridge_slave_0) entered disabled state [ 28.687689] bridge0: port 2(bridge_slave_1) entered disabled state [ 28.697830] IPv6: ADDRCONF(NETDEV_UP): team0: link is not ready [ 28.704374] 8021q: adding VLAN 0 to HW filter on device team0 [ 28.712231] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 28.720068] bridge0: port 1(bridge_slave_0) entered blocking state [ 28.726464] bridge0: port 1(bridge_slave_0) entered forwarding state [ 28.743739] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 28.751290] bridge0: port 2(bridge_slave_1) entered blocking state [ 28.757680] bridge0: port 2(bridge_slave_1) entered forwarding state [ 28.765891] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 28.773575] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 28.781015] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 28.788608] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 28.798437] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 28.809148] IPv6: ADDRCONF(NETDEV_UP): hsr0: link is not ready [ 28.815196] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 28.822044] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 28.834898] IPv6: ADDRCONF(NETDEV_UP): vxcan0: link is not ready [ 28.841922] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 28.849448] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 28.859084] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 28.907463] IPv6: ADDRCONF(NETDEV_UP): veth0_virt_wifi: link is not ready [ 28.917566] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 28.945581] IPv6: ADDRCONF(NETDEV_UP): veth0_vlan: link is not ready [ 28.952443] IPv6: ADDRCONF(NETDEV_UP): vlan0: link is not ready [ 28.960106] IPv6: ADDRCONF(NETDEV_UP): vlan1: link is not ready [ 28.968781] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 28.976860] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 28.983799] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 28.992054] device veth0_vlan entered promiscuous mode [ 29.000646] device veth1_vlan entered promiscuous mode [ 29.006697] IPv6: ADDRCONF(NETDEV_UP): macvlan0: link is not ready [ 29.016225] IPv6: ADDRCONF(NETDEV_UP): macvlan1: link is not ready [ 29.028723] IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready [ 29.037570] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 29.045031] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 29.052134] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 29.061153] device veth0_macvtap entered promiscuous mode [ 29.067645] IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready [ 29.075527] device veth1_macvtap entered promiscuous mode [ 29.083444] IPv6: ADDRCONF(NETDEV_UP): veth0_to_batadv: link is not ready [ 29.091889] IPv6: ADDRCONF(NETDEV_UP): veth1_to_batadv: link is not ready [ 29.101633] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 29.108885] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 29.116999] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 29.125990] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 29.134217] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready executing program executing program [ 29.193553] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program 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executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 45.919420] block nbd0: NBD_DISCONNECT [ 45.923564] kasan: CONFIG_KASAN_INLINE enabled [ 45.928134] kasan: GPF could be caused by NULL-ptr deref or user memory access [ 45.935532] general protection fault: 0000 [#1] PREEMPT SMP KASAN [ 45.941751] Modules linked in: [ 45.944925] CPU: 0 PID: 10449 Comm: systemd-udevd Not tainted 4.14.275-syzkaller #0 [ 45.952695] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 45.962044] task: ffff8880a64c01c0 task.stack: ffff8880a66f0000 [ 45.968081] RIP: 0010:__lock_acquire+0x1cc/0x3f20 [ 45.972897] RSP: 0018:ffff8880a66f7938 EFLAGS: 00010006 [ 45.978239] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 45.985571] RDX: 0000000000000022 RSI: 0000000000000000 RDI: 0000000000000110 [ 45.992816] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 46.000060] R10: 0000000000000001 R11: ffff8880a64c01c0 R12: 0000000000000110 [ 46.007315] R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8bed0d40 [ 46.014564] FS: 00007fcd0687b8c0(0000) GS:ffff8880ba400000(0000) knlGS:0000000000000000 [ 46.022765] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.028621] CR2: 00007ffc6375e9b0 CR3: 000000009cfac000 CR4: 00000000003406f0 [ 46.035874] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.043120] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.050368] Call Trace: [ 46.052944] ? vprintk_emit+0x170/0x620 [ 46.056895] ? dev_vprintk_emit+0x1da/0x440 [ 46.061197] ? trace_hardirqs_on+0x10/0x10 [ 46.065406] ? dev_driver_string+0x160/0x160 [ 46.069791] ? __lock_acquire+0x5fc/0x3f20 [ 46.074005] ? trace_hardirqs_on+0x10/0x10 [ 46.078221] lock_acquire+0x170/0x3f0 [ 46.082056] ? flush_workqueue+0xcb/0x1310 [ 46.086270] flush_workqueue+0xfa/0x1310 [ 46.090307] ? flush_workqueue+0xcb/0x1310 [ 46.094517] ? nbd_disconnect_and_put+0x99/0x140 [ 46.099249] ? lock_downgrade+0x740/0x740 [ 46.103380] ? check_flush_dependency+0x2a0/0x2a0 [ 46.108203] nbd_disconnect_and_put+0xc3/0x140 [ 46.112763] nbd_release+0x123/0x150 [ 46.116454] ? nbd_queue_rq+0xc50/0xc50 [ 46.120419] __blkdev_put+0x5aa/0x800 [ 46.124196] ? revalidate_disk+0x1f0/0x1f0 [ 46.128406] ? locks_remove_file+0x2cd/0x420 [ 46.132791] ? blkdev_put+0x75/0x4c0 [ 46.136479] ? blkdev_put+0x4c0/0x4c0 [ 46.140275] blkdev_close+0x86/0xb0 [ 46.143877] __fput+0x25f/0x7a0 [ 46.147218] task_work_run+0x11f/0x190 [ 46.151100] exit_to_usermode_loop+0x1ad/0x200 [ 46.155692] do_syscall_64+0x4a3/0x640 [ 46.159581] entry_SYSCALL_64_after_hwframe+0x46/0xbb [ 46.164751] RIP: 0033:0x7fcd059c1270 [ 46.168439] RSP: 002b:00007ffc636155a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 46.176124] RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fcd059c1270 [ 46.183376] RDX: 000000000aba9500 RSI: 0000000000000000 RDI: 0000000000000007 [ 46.190638] RBP: 00007fcd0687b710 R08: 0000000000000045 R09: 0000000000000018 [ 46.197904] R10: 0000559fceeccf68 R11: 0000000000000246 R12: 0000000000000000 [ 46.205151] R13: 0000559fceeccdd0 R14: 0000000000000003 R15: 000000000000000e [ 46.212399] Code: 18 00 00 00 00 48 81 c4 80 01 00 00 44 89 e8 5b 5d 41 5c 41 5d 41 5e 41 5f c3 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 0f 85 67 2a 00 00 49 81 3c 24 a0 c7 2f 8b 0f 84 5f [ 46.231449] RIP: __lock_acquire+0x1cc/0x3f20 RSP: ffff8880a66f7938 [ 46.237857] ---[ end trace 7e65dee86412b5df ]--- [ 46.242600] Kernel panic - not syncing: Fatal exception [ 46.248120] Kernel Offset: disabled [ 46.251731] Rebooting in 86400 seconds..