Warning: Permanently added '10.128.0.122' (ECDSA) to the list of known hosts. 2021/09/03 09:16:52 fuzzer started 2021/09/03 09:16:52 connecting to host at 10.128.0.169:33437 2021/09/03 09:16:52 checking machine... 2021/09/03 09:16:52 checking revisions... 2021/09/03 09:16:53 testing simple program... syzkaller login: [ 76.689728][ T6582] chnl_net:caif_netlink_parms(): no params data found [ 76.771436][ T6582] bridge0: port 1(bridge_slave_0) entered blocking state [ 76.780533][ T6582] bridge0: port 1(bridge_slave_0) entered disabled state [ 76.790289][ T6582] device bridge_slave_0 entered promiscuous mode [ 76.801332][ T6582] bridge0: port 2(bridge_slave_1) entered blocking state [ 76.809598][ T6582] bridge0: port 2(bridge_slave_1) entered disabled state [ 76.818778][ T6582] device bridge_slave_1 entered promiscuous mode [ 76.851807][ T6582] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 76.863559][ T6582] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 76.901118][ T6582] team0: Port device team_slave_0 added [ 76.909135][ T6582] team0: Port device team_slave_1 added [ 76.938707][ T6582] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 76.945870][ T6582] 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. [ 76.972990][ T6582] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 76.989710][ T6582] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 76.997931][ T6582] 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. [ 77.027861][ T6582] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 77.067878][ T6582] device hsr_slave_0 entered promiscuous mode [ 77.075613][ T6582] device hsr_slave_1 entered promiscuous mode [ 77.210653][ T6582] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 77.223294][ T6582] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 77.235286][ T6582] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 77.246807][ T6582] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 77.272954][ T6582] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.280808][ T6582] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.289077][ T6582] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.296169][ T6582] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.340825][ T6582] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.355000][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.368801][ T1052] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.379101][ T1052] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.389392][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 77.403276][ T6582] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.415413][ T1913] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 77.424314][ T1913] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.431612][ T1913] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.444176][ T6913] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 77.452674][ T6913] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.459862][ T6913] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.488563][ T6913] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 77.498383][ T6913] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 77.508012][ T6913] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 77.521554][ T6582] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 77.534621][ T6582] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 77.545316][ T6913] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 77.553865][ T6913] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 77.574232][ T1913] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 77.582049][ T1913] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 77.597036][ T6582] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 77.617530][ T6913] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 77.639097][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 77.649566][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 77.658069][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 77.670944][ T6582] device veth0_vlan entered promiscuous mode [ 77.682918][ T6582] device veth1_vlan entered promiscuous mode [ 77.706205][ T1913] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 77.715090][ T1913] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 77.727377][ T6582] device veth0_macvtap entered promiscuous mode [ 77.739712][ T6582] device veth1_macvtap entered promiscuous mode [ 77.758818][ T6582] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 77.773316][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 77.782236][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 77.792509][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 77.801511][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 77.814942][ T6582] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 77.822613][ T1913] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 77.831608][ T1913] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 77.843495][ T6582] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.852695][ T6582] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.861953][ T6582] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 77.874269][ T6582] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 77.968392][ T1374] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.000980][ T1374] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.013666][ T10] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.031776][ T10] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.040623][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 78.058754][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/09/03 09:16:56 building call list... [ 80.491829][ T1374] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 81.019263][ T6582] syz-executor.0 (6582) used greatest stack depth: 22400 bytes left [ 81.293986][ T6576] ================================================================== [ 81.302458][ T6576] BUG: KASAN: null-ptr-deref in fuse_conn_put+0x1d7/0x300 [ 81.309673][ T6576] Read of size 4 at addr 0000000000000000 by task syz-fuzzer/6576 [ 81.317987][ T6576] [ 81.320304][ T6576] CPU: 1 PID: 6576 Comm: syz-fuzzer Not tainted 5.14.0-next-20210903-syzkaller #0 [ 81.329784][ T6576] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.340501][ T6576] Call Trace: [ 81.345605][ T6576] dump_stack_lvl+0xcd/0x134 [ 81.350314][ T6576] kasan_report.cold+0x66/0xdf [ 81.355386][ T6576] ? fuse_conn_put+0x1d7/0x300 [ 81.360158][ T6576] kasan_check_range+0x13d/0x180 [ 81.365380][ T6576] fuse_conn_put+0x1d7/0x300 [ 81.370092][ T6576] fuse_dev_free+0x155/0x1f0 [ 81.374692][ T6576] fuse_dev_release+0x2a8/0x3f0 [ 81.379732][ T6576] ? fuse_abort_conn+0xc90/0xc90 [ 81.384871][ T6576] ? cuse_channel_release+0x237/0x300 [ 81.390250][ T6576] __fput+0x288/0x9f0 [ 81.394486][ T6576] ? cuse_class_waiting_show+0xa0/0xa0 [ 81.400065][ T6576] task_work_run+0xdd/0x1a0 [ 81.404765][ T6576] exit_to_user_mode_prepare+0x27e/0x290 [ 81.410430][ T6576] syscall_exit_to_user_mode+0x19/0x60 [ 81.415911][ T6576] do_syscall_64+0x42/0xb0 [ 81.420596][ T6576] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 81.426502][ T6576] RIP: 0033:0x4af19b [ 81.430405][ T6576] Code: fb ff eb bd e8 a6 b6 fb ff e9 61 ff ff ff cc e8 9b 82 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 81.450124][ T6576] RSP: 002b:000000c000665430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 [ 81.458631][ T6576] RAX: 0000000000000000 RBX: 000000c00001e800 RCX: 00000000004af19b [ 81.466610][ T6576] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 81.474597][ T6576] RBP: 000000c000665470 R08: 0000000000000001 R09: 0000000000000000 [ 81.482831][ T6576] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000149 [ 81.491446][ T6576] R13: 0000000000000148 R14: 0000000000000200 R15: 000000c00029d4a0 [ 81.499546][ T6576] ================================================================== [ 81.507796][ T6576] Disabling lock debugging due to kernel taint [ 81.515352][ T6576] Kernel panic - not syncing: panic_on_warn set ... [ 81.522393][ T6576] CPU: 0 PID: 6576 Comm: syz-fuzzer Tainted: G B 5.14.0-next-20210903-syzkaller #0 [ 81.533684][ T6576] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.543946][ T6576] Call Trace: [ 81.547331][ T6576] dump_stack_lvl+0xcd/0x134 [ 81.552105][ T6576] panic+0x2b0/0x6dd [ 81.556020][ T6576] ? __warn_printk+0xf3/0xf3 [ 81.560637][ T6576] ? preempt_schedule_common+0x59/0xc0 [ 81.566531][ T6576] ? fuse_conn_put+0x1d7/0x300 [ 81.571377][ T6576] ? preempt_schedule_thunk+0x16/0x18 [ 81.577943][ T6576] ? trace_hardirqs_on+0x38/0x1c0 [ 81.583077][ T6576] ? trace_hardirqs_on+0x51/0x1c0 [ 81.588190][ T6576] ? fuse_conn_put+0x1d7/0x300 [ 81.593256][ T6576] ? fuse_conn_put+0x1d7/0x300 [ 81.598273][ T6576] end_report.cold+0x63/0x6f [ 81.602949][ T6576] kasan_report.cold+0x71/0xdf [ 81.607740][ T6576] ? fuse_conn_put+0x1d7/0x300 [ 81.612620][ T6576] kasan_check_range+0x13d/0x180 [ 81.617646][ T6576] fuse_conn_put+0x1d7/0x300 [ 81.622230][ T6576] fuse_dev_free+0x155/0x1f0 [ 81.626879][ T6576] fuse_dev_release+0x2a8/0x3f0 [ 81.631944][ T6576] ? fuse_abort_conn+0xc90/0xc90 [ 81.637070][ T6576] ? cuse_channel_release+0x237/0x300 [ 81.642530][ T6576] __fput+0x288/0x9f0 [ 81.646565][ T6576] ? cuse_class_waiting_show+0xa0/0xa0 [ 81.652725][ T6576] task_work_run+0xdd/0x1a0 [ 81.657340][ T6576] exit_to_user_mode_prepare+0x27e/0x290 [ 81.663082][ T6576] syscall_exit_to_user_mode+0x19/0x60 [ 81.668554][ T6576] do_syscall_64+0x42/0xb0 [ 81.673070][ T6576] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 81.679088][ T6576] RIP: 0033:0x4af19b [ 81.682980][ T6576] Code: fb ff eb bd e8 a6 b6 fb ff e9 61 ff ff ff cc e8 9b 82 fb ff 48 8b 7c 24 10 48 8b 74 24 18 48 8b 54 24 20 48 8b 44 24 08 0f 05 <48> 3d 01 f0 ff ff 76 20 48 c7 44 24 28 ff ff ff ff 48 c7 44 24 30 [ 81.703220][ T6576] RSP: 002b:000000c000665430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 [ 81.711637][ T6576] RAX: 0000000000000000 RBX: 000000c00001e800 RCX: 00000000004af19b [ 81.719868][ T6576] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 81.728015][ T6576] RBP: 000000c000665470 R08: 0000000000000001 R09: 0000000000000000 [ 81.736252][ T6576] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000149 [ 81.744223][ T6576] R13: 0000000000000148 R14: 0000000000000200 R15: 000000c00029d4a0 [ 81.754068][ T6576] Kernel Offset: disabled [ 81.758582][ T6576] Rebooting in 86400 seconds..