[ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.112' (ECDSA) to the list of known hosts. 2020/03/30 10:41:43 parsed 1 programs 2020/03/30 10:41:45 executed programs: 0 syzkaller login: [ 63.124561][ T7016] IPVS: ftp: loaded support on port[0] = 21 [ 63.220888][ T7016] chnl_net:caif_netlink_parms(): no params data found [ 63.272636][ T7016] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.280729][ T7016] bridge0: port 1(bridge_slave_0) entered disabled state [ 63.288819][ T7016] device bridge_slave_0 entered promiscuous mode [ 63.299814][ T7016] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.307536][ T7016] bridge0: port 2(bridge_slave_1) entered disabled state [ 63.316169][ T7016] device bridge_slave_1 entered promiscuous mode [ 63.336817][ T7016] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 63.348079][ T7016] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 63.371843][ T7016] team0: Port device team_slave_0 added [ 63.379433][ T7016] team0: Port device team_slave_1 added [ 63.399827][ T7016] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 63.407153][ T7016] 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. [ 63.433572][ T7016] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 63.446140][ T7016] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 63.453704][ T7016] 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. [ 63.480454][ T7016] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 63.553270][ T7016] device hsr_slave_0 entered promiscuous mode [ 63.610300][ T7016] device hsr_slave_1 entered promiscuous mode [ 63.759352][ T7016] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 63.793574][ T7016] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 63.842731][ T7016] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 63.902433][ T7016] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 63.975360][ T7016] bridge0: port 2(bridge_slave_1) entered blocking state [ 63.983119][ T7016] bridge0: port 2(bridge_slave_1) entered forwarding state [ 63.991169][ T7016] bridge0: port 1(bridge_slave_0) entered blocking state [ 63.998444][ T7016] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.046240][ T7016] 8021q: adding VLAN 0 to HW filter on device bond0 [ 64.062548][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 64.073489][ T37] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.082427][ T37] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.091634][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 64.106118][ T7016] 8021q: adding VLAN 0 to HW filter on device team0 [ 64.117935][ T45] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 64.128422][ T45] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.136022][ T45] bridge0: port 1(bridge_slave_0) entered forwarding state [ 64.148092][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 64.158047][ T37] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.165471][ T37] bridge0: port 2(bridge_slave_1) entered forwarding state [ 64.190630][ T45] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 64.201529][ T45] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 64.210071][ T45] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 64.223777][ T7016] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 64.236353][ T7016] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 64.245249][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 64.253409][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 64.262724][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 64.287876][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 64.296113][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 64.311447][ T7016] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 64.331390][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 64.341249][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 64.364671][ T7016] device veth0_vlan entered promiscuous mode [ 64.371844][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 64.381655][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 64.392076][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 64.400548][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 64.414989][ T7016] device veth1_vlan entered promiscuous mode [ 64.438254][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 64.447452][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 64.457141][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 64.466834][ T2792] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 64.478429][ T7016] device veth0_macvtap entered promiscuous mode [ 64.488992][ T7016] device veth1_macvtap entered promiscuous mode [ 64.508186][ T7016] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 64.516423][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 64.525846][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 64.534867][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 64.544274][ T37] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 64.556270][ T7016] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 64.564867][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 64.574256][ T2723] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 65.517903][ T7302] ------------[ cut here ]------------ [ 65.524129][ T7302] kernel BUG at drivers/dma-buf/dma-buf.c:99! [ 65.531615][ T7302] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 65.538072][ T7302] CPU: 0 PID: 7302 Comm: syz-executor.0 Not tainted 5.6.0-syzkaller #0 [ 65.546490][ T7302] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.556915][ T7302] RIP: 0010:dma_buf_release+0x36b/0x440 [ 65.562467][ T7302] Code: c0 00 00 00 45 31 e4 e8 33 1e 4b fd 48 89 ef e8 2b 1e 4b fd e8 76 a8 0e fd 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 e8 65 a8 0e fd <0f> 0b e8 5e a8 0e fd 4c 89 e7 e8 86 e0 00 00 e9 6a ff ff ff e8 4c [ 65.582596][ T7302] RSP: 0018:ffffc90002027e08 EFLAGS: 00010293 [ 65.588652][ T7302] RAX: ffff8880a609e340 RBX: 0000000000000004 RCX: ffffffff84637a66 [ 65.596741][ T7302] RDX: 0000000000000000 RSI: ffffffff84637ceb RDI: 0000000000000005 [ 65.604904][ T7302] RBP: ffff8880a8429800 R08: ffff8880a609e340 R09: 0000000000000000 [ 65.612987][ T7302] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a79feafc [ 65.621035][ T7302] R13: ffff8880a79feaa8 R14: ffff88808afa5488 R15: ffffffff84637980 [ 65.629034][ T7302] FS: 0000000000df9940(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 [ 65.638037][ T7302] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.644630][ T7302] CR2: 000055d5665fe160 CR3: 00000000a4e55000 CR4: 00000000001406f0 [ 65.652738][ T7302] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.660869][ T7302] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.668837][ T7302] Call Trace: [ 65.672250][ T7302] __fput+0x2da/0x850 [ 65.676224][ T7302] task_work_run+0x13f/0x1b0 [ 65.680899][ T7302] exit_to_usermode_loop+0x2fa/0x360 [ 65.686172][ T7302] do_syscall_64+0x6b1/0x7d0 [ 65.690844][ T7302] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 65.696895][ T7302] RIP: 0033:0x4163e1 [ 65.700783][ T7302] Code: 75 14 b8 03 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 04 1b 00 00 c3 48 83 ec 08 e8 0a fc ff ff 48 89 04 24 b8 03 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 53 fc ff ff 48 89 d0 48 83 c4 08 48 3d 01 [ 65.721505][ T7302] RSP: 002b:00007ffc52ce5c80 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 65.729907][ T7302] RAX: 0000000000000000 RBX: 0000000000000008 RCX: 00000000004163e1 [ 65.737873][ T7302] RDX: 0000000000000000 RSI: 0000000000000081 RDI: 0000000000000007 [ 65.745829][ T7302] RBP: 0000000000000000 R08: 0000000000000000 R09: 01ffffffffffffff [ 65.753810][ T7302] R10: 00000000007708c0 R11: 0000000000000293 R12: 000000000076bf00 [ 65.761768][ T7302] R13: 00000000007708d0 R14: 0000000000000000 R15: 000000000076bf0c [ 65.771870][ T7302] Modules linked in: [ 65.777090][ T7302] ---[ end trace 30224f387ae80f33 ]--- [ 65.783041][ T7302] RIP: 0010:dma_buf_release+0x36b/0x440 [ 65.788783][ T7302] Code: c0 00 00 00 45 31 e4 e8 33 1e 4b fd 48 89 ef e8 2b 1e 4b fd e8 76 a8 0e fd 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 e8 65 a8 0e fd <0f> 0b e8 5e a8 0e fd 4c 89 e7 e8 86 e0 00 00 e9 6a ff ff ff e8 4c [ 65.810552][ T7302] RSP: 0018:ffffc90002027e08 EFLAGS: 00010293 [ 65.816709][ T7302] RAX: ffff8880a609e340 RBX: 0000000000000004 RCX: ffffffff84637a66 [ 65.825096][ T7302] RDX: 0000000000000000 RSI: ffffffff84637ceb RDI: 0000000000000005 [ 65.834015][ T7302] RBP: ffff8880a8429800 R08: ffff8880a609e340 R09: 0000000000000000 [ 65.842478][ T7302] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a79feafc [ 65.850919][ T7302] R13: ffff8880a79feaa8 R14: ffff88808afa5488 R15: ffffffff84637980 [ 65.858891][ T7302] FS: 0000000000df9940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 65.868288][ T7302] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 65.875373][ T7302] CR2: 00007f27f003d148 CR3: 00000000a4e55000 CR4: 00000000001406e0 [ 65.883972][ T7302] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 65.892340][ T7302] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 65.900510][ T7302] Kernel panic - not syncing: Fatal exception [ 65.908780][ T7302] Kernel Offset: disabled [ 65.913104][ T7302] Rebooting in 86400 seconds..