Warning: Permanently added '10.128.1.58' (ECDSA) to the list of known hosts. 2021/09/02 12:16:21 fuzzer started 2021/09/02 12:16:21 connecting to host at 10.128.0.169:44325 2021/09/02 12:16:21 checking machine... 2021/09/02 12:16:21 checking revisions... 2021/09/02 12:16:21 testing simple program... syzkaller login: [ 76.949270][ T6541] chnl_net:caif_netlink_parms(): no params data found [ 77.028826][ T6541] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.037130][ T6541] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.047106][ T6541] device bridge_slave_0 entered promiscuous mode [ 77.058436][ T6541] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.068399][ T6541] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.077721][ T6541] device bridge_slave_1 entered promiscuous mode [ 77.111007][ T6541] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 77.122571][ T6541] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 77.161419][ T6541] team0: Port device team_slave_0 added [ 77.169447][ T6541] team0: Port device team_slave_1 added [ 77.199261][ T6541] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 77.206856][ T6541] 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. [ 77.235522][ T6541] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 77.249647][ T6541] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 77.257676][ T6541] 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. [ 77.285723][ T6541] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 77.324385][ T6541] device hsr_slave_0 entered promiscuous mode [ 77.331796][ T6541] device hsr_slave_1 entered promiscuous mode [ 77.465687][ T6541] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 77.479533][ T6541] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 77.489850][ T6541] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 77.501403][ T6541] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 77.530398][ T6541] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.537861][ T6541] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.546673][ T6541] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.555002][ T6541] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.603631][ T6541] 8021q: adding VLAN 0 to HW filter on device bond0 [ 77.619948][ T1287] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 77.631852][ T1287] bridge0: port 1(bridge_slave_0) entered disabled state [ 77.641533][ T1287] bridge0: port 2(bridge_slave_1) entered disabled state [ 77.651228][ T1287] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 77.666407][ T6541] 8021q: adding VLAN 0 to HW filter on device team0 [ 77.678251][ T1287] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 77.688322][ T1287] bridge0: port 1(bridge_slave_0) entered blocking state [ 77.695556][ T1287] bridge0: port 1(bridge_slave_0) entered forwarding state [ 77.709781][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 77.719543][ T1052] bridge0: port 2(bridge_slave_1) entered blocking state [ 77.726989][ T1052] bridge0: port 2(bridge_slave_1) entered forwarding state [ 77.751871][ T1287] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 77.773121][ T6541] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 77.783956][ T6541] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 77.798636][ T1287] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 77.808149][ T1287] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 77.817577][ T1287] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 77.827212][ T1287] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 77.837305][ T1287] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 77.856123][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 77.864285][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 77.880864][ T6541] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 77.901939][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 77.926888][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 77.937244][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 77.946543][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 77.959266][ T6541] device veth0_vlan entered promiscuous mode [ 77.971669][ T6541] device veth1_vlan entered promiscuous mode [ 77.995933][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 78.006458][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 78.019944][ T6541] device veth0_macvtap entered promiscuous mode [ 78.030175][ T6541] device veth1_macvtap entered promiscuous mode [ 78.055231][ T6541] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 78.064013][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 78.074158][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 78.083790][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 78.093928][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 78.107297][ T6541] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 78.115690][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 78.124568][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 78.138795][ T6541] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.149362][ T6541] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.164061][ T6541] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 78.174962][ T6541] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.284160][ T10] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.301194][ T10] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.322824][ T149] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.334203][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 78.348461][ T149] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.361092][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/09/02 12:16:25 building call list... [ 80.760910][ T8] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 81.352769][ T6541] syz-executor.0 (6541) used greatest stack depth: 22528 bytes left [ 81.655560][ T6530] ================================================================== [ 81.664065][ T6530] BUG: KASAN: null-ptr-deref in fuse_conn_put+0x1d7/0x300 [ 81.671183][ T6530] Read of size 4 at addr 0000000000000000 by task syz-fuzzer/6530 [ 81.679067][ T6530] [ 81.681393][ T6530] CPU: 0 PID: 6530 Comm: syz-fuzzer Not tainted 5.14.0-next-20210902-syzkaller #0 [ 81.690844][ T6530] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.700909][ T6530] Call Trace: [ 81.704197][ T6530] dump_stack_lvl+0xcd/0x134 [ 81.709107][ T6530] kasan_report.cold+0x66/0xdf [ 81.713891][ T6530] ? fuse_conn_put+0x1d7/0x300 [ 81.718868][ T6530] kasan_check_range+0x13d/0x180 [ 81.724103][ T6530] fuse_conn_put+0x1d7/0x300 [ 81.728706][ T6530] fuse_dev_free+0x155/0x1f0 [ 81.733434][ T6530] fuse_dev_release+0x2a8/0x3f0 [ 81.738405][ T6530] ? fuse_abort_conn+0xc90/0xc90 [ 81.743396][ T6530] ? cuse_channel_release+0x237/0x300 [ 81.749048][ T6530] __fput+0x288/0x9f0 [ 81.753322][ T6530] ? cuse_class_waiting_show+0xa0/0xa0 [ 81.758894][ T6530] task_work_run+0xdd/0x1a0 [ 81.763887][ T6530] exit_to_user_mode_prepare+0x27e/0x290 [ 81.769607][ T6530] syscall_exit_to_user_mode+0x19/0x60 [ 81.775173][ T6530] do_syscall_64+0x42/0xb0 [ 81.779752][ T6530] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 81.786017][ T6530] RIP: 0033:0x4af19b [ 81.789908][ T6530] 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 [ 81.809596][ T6530] RSP: 002b:000000c000407430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 [ 81.818097][ T6530] RAX: 0000000000000000 RBX: 000000c00001c000 RCX: 00000000004af19b [ 81.827206][ T6530] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 81.836079][ T6530] RBP: 000000c000407470 R08: 0000000000000001 R09: 0000000000000000 [ 81.844423][ T6530] R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000014f [ 81.852844][ T6530] R13: 000000000000014e R14: 0000000000000200 R15: 000000c00036a000 [ 81.861086][ T6530] ================================================================== [ 81.869225][ T6530] Disabling lock debugging due to kernel taint [ 81.876363][ T6530] Kernel panic - not syncing: panic_on_warn set ... [ 81.882974][ T6530] CPU: 1 PID: 6530 Comm: syz-fuzzer Tainted: G B 5.14.0-next-20210902-syzkaller #0 [ 81.893568][ T6530] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.904108][ T6530] Call Trace: [ 81.907577][ T6530] dump_stack_lvl+0xcd/0x134 [ 81.912311][ T6530] panic+0x2b0/0x6dd [ 81.916387][ T6530] ? __warn_printk+0xf3/0xf3 [ 81.921070][ T6530] ? preempt_schedule_common+0x59/0xc0 [ 81.926526][ T6530] ? fuse_conn_put+0x1d7/0x300 [ 81.932024][ T6530] ? preempt_schedule_thunk+0x16/0x18 [ 81.937448][ T6530] ? trace_hardirqs_on+0x38/0x1c0 [ 81.942775][ T6530] ? trace_hardirqs_on+0x51/0x1c0 [ 81.948154][ T6530] ? fuse_conn_put+0x1d7/0x300 [ 81.952916][ T6530] ? fuse_conn_put+0x1d7/0x300 [ 81.958148][ T6530] end_report.cold+0x63/0x6f [ 81.962758][ T6530] kasan_report.cold+0x71/0xdf [ 81.968115][ T6530] ? fuse_conn_put+0x1d7/0x300 [ 81.972901][ T6530] kasan_check_range+0x13d/0x180 [ 81.977845][ T6530] fuse_conn_put+0x1d7/0x300 [ 81.982444][ T6530] fuse_dev_free+0x155/0x1f0 [ 81.987125][ T6530] fuse_dev_release+0x2a8/0x3f0 [ 81.992057][ T6530] ? fuse_abort_conn+0xc90/0xc90 [ 81.996993][ T6530] ? cuse_channel_release+0x237/0x300 [ 82.002559][ T6530] __fput+0x288/0x9f0 [ 82.006622][ T6530] ? cuse_class_waiting_show+0xa0/0xa0 [ 82.012080][ T6530] task_work_run+0xdd/0x1a0 [ 82.016953][ T6530] exit_to_user_mode_prepare+0x27e/0x290 [ 82.022694][ T6530] syscall_exit_to_user_mode+0x19/0x60 [ 82.028332][ T6530] do_syscall_64+0x42/0xb0 [ 82.032953][ T6530] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 82.038868][ T6530] RIP: 0033:0x4af19b [ 82.043087][ T6530] 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 [ 82.063649][ T6530] RSP: 002b:000000c000407430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 [ 82.073105][ T6530] RAX: 0000000000000000 RBX: 000000c00001c000 RCX: 00000000004af19b [ 82.081643][ T6530] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 82.090049][ T6530] RBP: 000000c000407470 R08: 0000000000000001 R09: 0000000000000000 [ 82.098389][ T6530] R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000014f [ 82.108272][ T6530] R13: 000000000000014e R14: 0000000000000200 R15: 000000c00036a000 [ 82.117058][ T6530] Kernel Offset: disabled [ 82.121397][ T6530] Rebooting in 86400 seconds..