[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 69.079589][ T27] audit: type=1800 audit(1583551834.189:25): pid=9171 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 69.115362][ T27] audit: type=1800 audit(1583551834.189:26): pid=9171 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 69.149827][ T27] audit: type=1800 audit(1583551834.189:27): pid=9171 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.219' (ECDSA) to the list of known hosts. 2020/03/07 03:30:46 parsed 1 programs 2020/03/07 03:30:48 executed programs: 0 syzkaller login: [ 83.259681][ T9342] IPVS: ftp: loaded support on port[0] = 21 [ 83.321603][ T9342] chnl_net:caif_netlink_parms(): no params data found [ 83.361822][ T9342] bridge0: port 1(bridge_slave_0) entered blocking state [ 83.369539][ T9342] bridge0: port 1(bridge_slave_0) entered disabled state [ 83.377424][ T9342] device bridge_slave_0 entered promiscuous mode [ 83.385952][ T9342] bridge0: port 2(bridge_slave_1) entered blocking state [ 83.393041][ T9342] bridge0: port 2(bridge_slave_1) entered disabled state [ 83.401056][ T9342] device bridge_slave_1 entered promiscuous mode [ 83.419164][ T9342] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 83.429866][ T9342] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 83.450305][ T9342] team0: Port device team_slave_0 added [ 83.457514][ T9342] team0: Port device team_slave_1 added [ 83.472813][ T9342] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 83.479831][ T9342] 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. [ 83.506175][ T9342] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 83.518414][ T9342] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 83.525410][ T9342] 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. [ 83.551297][ T9342] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 83.608297][ T9342] device hsr_slave_0 entered promiscuous mode [ 83.645687][ T9342] device hsr_slave_1 entered promiscuous mode [ 83.781955][ T9342] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 83.828551][ T9342] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 83.897490][ T9342] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 83.937570][ T9342] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 84.001675][ T9342] bridge0: port 2(bridge_slave_1) entered blocking state [ 84.008858][ T9342] bridge0: port 2(bridge_slave_1) entered forwarding state [ 84.016646][ T9342] bridge0: port 1(bridge_slave_0) entered blocking state [ 84.023695][ T9342] bridge0: port 1(bridge_slave_0) entered forwarding state [ 84.068575][ T9342] 8021q: adding VLAN 0 to HW filter on device bond0 [ 84.081035][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 84.101453][ T12] bridge0: port 1(bridge_slave_0) entered disabled state [ 84.110059][ T12] bridge0: port 2(bridge_slave_1) entered disabled state [ 84.118858][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 84.130784][ T9342] 8021q: adding VLAN 0 to HW filter on device team0 [ 84.141697][ T3509] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 84.150420][ T3509] bridge0: port 1(bridge_slave_0) entered blocking state [ 84.157601][ T3509] bridge0: port 1(bridge_slave_0) entered forwarding state [ 84.168735][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 84.177825][ T12] bridge0: port 2(bridge_slave_1) entered blocking state [ 84.184856][ T12] bridge0: port 2(bridge_slave_1) entered forwarding state [ 84.206765][ T3509] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 84.215177][ T3509] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 84.224696][ T3509] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 84.237261][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 84.250316][ T9342] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 84.263500][ T9342] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 84.271766][ T3509] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 84.289859][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 84.298155][ T12] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 84.310264][ T9342] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 84.329557][ T9347] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 84.339701][ T9347] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 84.359174][ T3509] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 84.368725][ T3509] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 84.380841][ T9342] device veth0_vlan entered promiscuous mode [ 84.387452][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 84.395145][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 84.407759][ T9342] device veth1_vlan entered promiscuous mode [ 84.428483][ T9347] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 84.436895][ T9347] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 84.444733][ T9347] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 84.453366][ T9347] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 84.464210][ T9342] device veth0_macvtap entered promiscuous mode [ 84.474563][ T9342] device veth1_macvtap entered promiscuous mode [ 84.491688][ T9342] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 84.500073][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 84.508323][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 84.516417][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 84.524847][ T22] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 84.537947][ T9342] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 84.545313][ T9347] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 84.553763][ T9347] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 85.045491][ T9342] general protection fault, probably for non-canonical address 0xdffffc0000000021: 0000 [#1] PREEMPT SMP KASAN [ 85.057238][ T9342] KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f] [ 85.065638][ T9342] CPU: 1 PID: 9342 Comm: syz-executor.0 Not tainted 5.6.0-rc3-next-20200228-syzkaller #0 [ 85.075421][ T9342] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 85.085484][ T9342] RIP: 0010:destroy_workqueue+0x2e/0x6b0 [ 85.091103][ T9342] Code: 49 89 fe 41 55 41 54 55 53 48 83 ec 08 e8 8a 6a 26 00 49 8d be 08 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 e0 05 00 00 49 8b 9e 08 01 00 00 48 85 db 74 19 [ 85.110706][ T9342] RSP: 0018:ffffc90001e47cc8 EFLAGS: 00010206 [ 85.116747][ T9342] RAX: dffffc0000000000 RBX: 0000000000000002 RCX: 0000000000000000 [ 85.124693][ T9342] RDX: 0000000000000021 RSI: ffffffff814c2af6 RDI: 0000000000000108 [ 85.132658][ T9342] RBP: ffff8882188e38f0 R08: ffff888092f6c080 R09: fffffbfff185270a [ 85.140629][ T9342] R10: fffffbfff1852709 R11: ffffffff8c29384f R12: ffff8882188e3800 [ 85.148573][ T9342] R13: ffff8882188e3804 R14: 0000000000000000 R15: 0000000000004c01 [ 85.156530][ T9342] FS: 0000000000f25940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 85.165453][ T9342] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.172026][ T9342] CR2: 00007f99d7229518 CR3: 00000000a6ca8000 CR4: 00000000001406e0 [ 85.179976][ T9342] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.187927][ T9342] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.195870][ T9342] Call Trace: [ 85.199151][ T9342] __loop_clr_fd+0x185/0x1280 [ 85.203818][ T9342] lo_ioctl+0x2b4/0x1460 [ 85.208044][ T9342] ? __loop_clr_fd+0x1280/0x1280 [ 85.212961][ T9342] blkdev_ioctl+0x25b/0x660 [ 85.217467][ T9342] ? blkdev_common_ioctl+0x1770/0x1770 [ 85.222927][ T9342] block_ioctl+0xe9/0x130 [ 85.227249][ T9342] ? blkdev_fallocate+0x3f0/0x3f0 [ 85.232257][ T9342] ksys_ioctl+0x11a/0x180 [ 85.236575][ T9342] __x64_sys_ioctl+0x6f/0xb0 [ 85.241141][ T9342] ? lockdep_hardirqs_on+0x417/0x5d0 [ 85.246415][ T9342] do_syscall_64+0xf6/0x790 [ 85.250910][ T9342] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 85.256781][ T9342] RIP: 0033:0x45c317 [ 85.260660][ T9342] Code: 48 83 c4 08 48 89 d8 5b 5d c3 66 0f 1f 84 00 00 00 00 00 48 89 e8 48 f7 d8 48 39 c3 0f 92 c0 eb 92 66 90 b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 0d b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 85.280247][ T9342] RSP: 002b:00007ffda4206d28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 85.288632][ T9342] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000045c317 [ 85.296576][ T9342] RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000003 [ 85.304521][ T9342] RBP: 0000000000000005 R08: 0000000000000000 R09: 000000000000000a [ 85.312469][ T9342] R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000000000 [ 85.320417][ T9342] R13: 00007ffda4206d60 R14: 0000000000014b67 R15: 00007ffda4206d70 [ 85.328369][ T9342] Modules linked in: [ 85.335755][ T9342] ---[ end trace 44be9a67f2ff2a2f ]--- [ 85.341219][ T9342] RIP: 0010:destroy_workqueue+0x2e/0x6b0 [ 85.346872][ T9342] Code: 49 89 fe 41 55 41 54 55 53 48 83 ec 08 e8 8a 6a 26 00 49 8d be 08 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 e0 05 00 00 49 8b 9e 08 01 00 00 48 85 db 74 19 [ 85.366584][ T9342] RSP: 0018:ffffc90001e47cc8 EFLAGS: 00010206 [ 85.372639][ T9342] RAX: dffffc0000000000 RBX: 0000000000000002 RCX: 0000000000000000 [ 85.380633][ T9342] RDX: 0000000000000021 RSI: ffffffff814c2af6 RDI: 0000000000000108 [ 85.388802][ T9342] RBP: ffff8882188e38f0 R08: ffff888092f6c080 R09: fffffbfff185270a [ 85.396790][ T9342] R10: fffffbfff1852709 R11: ffffffff8c29384f R12: ffff8882188e3800 [ 85.404752][ T9342] R13: ffff8882188e3804 R14: 0000000000000000 R15: 0000000000004c01 [ 85.414494][ T9342] FS: 0000000000f25940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 85.423466][ T9342] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 85.430078][ T9342] CR2: ffffffffff600400 CR3: 00000000a6ca8000 CR4: 00000000001406e0 [ 85.438059][ T9342] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 85.446041][ T9342] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 85.453996][ T9342] Kernel panic - not syncing: Fatal exception [ 85.461183][ T9342] Kernel Offset: disabled [ 85.465503][ T9342] Rebooting in 86400 seconds..