Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.231' (ECDSA) to the list of known hosts. 2021/09/06 08:53:01 fuzzer started 2021/09/06 08:53:01 connecting to host at 10.128.0.169:41293 2021/09/06 08:53:01 checking machine... 2021/09/06 08:53:01 checking revisions... 2021/09/06 08:53:01 testing simple program... syzkaller login: [ 72.540910][ T6541] chnl_net:caif_netlink_parms(): no params data found [ 72.615006][ T6541] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.622948][ T6541] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.631873][ T6541] device bridge_slave_0 entered promiscuous mode [ 72.641700][ T6541] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.649945][ T6541] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.658344][ T6541] device bridge_slave_1 entered promiscuous mode [ 72.688467][ T6541] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.700588][ T6541] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.735803][ T6541] team0: Port device team_slave_0 added [ 72.743001][ T6541] team0: Port device team_slave_1 added [ 72.772093][ T6541] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.779248][ 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. [ 72.806855][ T6541] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.819844][ T6541] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.827621][ 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. [ 72.854874][ T6541] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.891469][ T6541] device hsr_slave_0 entered promiscuous mode [ 72.898712][ T6541] device hsr_slave_1 entered promiscuous mode [ 73.029279][ T6541] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.043154][ T6541] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.055817][ T6541] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.068333][ T6541] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.095348][ T6541] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.103150][ T6541] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.111275][ T6541] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.118439][ T6541] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.168793][ T6541] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.181742][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.193595][ T1051] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.202761][ T1051] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.211582][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 73.226262][ T6541] 8021q: adding VLAN 0 to HW filter on device team0 [ 73.238323][ T1264] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 73.246758][ T1264] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.253800][ T1264] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.277727][ T1264] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 73.286585][ T1264] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.293679][ T1264] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.302555][ T1264] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 73.317008][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 73.325238][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 73.339249][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 73.359554][ T6541] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 73.370785][ T6541] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 73.380801][ T6875] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 73.403447][ T6541] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 73.412066][ T6875] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 73.420372][ T6875] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 73.440660][ T5] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 73.461885][ T6541] device veth0_vlan entered promiscuous mode [ 73.469513][ T6877] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 73.478782][ T6877] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 73.487979][ T6877] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 73.501379][ T6541] device veth1_vlan entered promiscuous mode [ 73.523120][ T6875] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 73.533016][ T6875] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 73.541449][ T6875] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 73.556772][ T6541] device veth0_macvtap entered promiscuous mode [ 73.568754][ T6541] device veth1_macvtap entered promiscuous mode [ 73.587079][ T6541] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 73.596995][ T6875] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 73.607956][ T6875] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 73.618902][ T6541] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 73.627022][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 73.636590][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 73.649900][ T6541] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.658974][ T6541] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.669177][ T6541] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 73.678025][ T6541] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 73.783267][ T10] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.806250][ T10] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.819383][ T159] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 73.826938][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 73.829172][ T159] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 73.846479][ T6878] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/09/06 08:53:04 building call list... [ 76.264941][ T10] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 76.998632][ T6534] ================================================================== [ 77.006865][ T6534] BUG: KASAN: null-ptr-deref in fuse_conn_put+0x1d7/0x300 [ 77.014059][ T6534] Read of size 4 at addr 0000000000000000 by task syz-fuzzer/6534 [ 77.021999][ T6534] [ 77.024317][ T6534] CPU: 1 PID: 6534 Comm: syz-fuzzer Not tainted 5.14.0-next-20210906-syzkaller #0 [ 77.033755][ T6534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.043915][ T6534] Call Trace: [ 77.047202][ T6534] dump_stack_lvl+0xcd/0x134 [ 77.051795][ T6534] kasan_report.cold+0x66/0xdf [ 77.056643][ T6534] ? fuse_conn_put+0x1d7/0x300 [ 77.061751][ T6534] kasan_check_range+0x13d/0x180 [ 77.066779][ T6534] fuse_conn_put+0x1d7/0x300 [ 77.071366][ T6534] fuse_dev_free+0x155/0x1f0 [ 77.076121][ T6534] fuse_dev_release+0x2a8/0x3f0 [ 77.080968][ T6534] ? fuse_abort_conn+0xc90/0xc90 [ 77.085898][ T6534] ? cuse_channel_release+0x237/0x300 [ 77.091467][ T6534] __fput+0x288/0x9f0 [ 77.095442][ T6534] ? cuse_class_waiting_show+0xa0/0xa0 [ 77.100896][ T6534] task_work_run+0xdd/0x1a0 [ 77.105409][ T6534] exit_to_user_mode_prepare+0x27e/0x290 [ 77.111050][ T6534] syscall_exit_to_user_mode+0x19/0x60 [ 77.116572][ T6534] do_syscall_64+0x42/0xb0 [ 77.121097][ T6534] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 77.126988][ T6534] RIP: 0033:0x4af19b [ 77.130874][ T6534] 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 [ 77.150480][ T6534] RSP: 002b:000000c000329430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 [ 77.158890][ T6534] RAX: 0000000000000000 RBX: 000000c00001c000 RCX: 00000000004af19b [ 77.166849][ T6534] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 77.174817][ T6534] RBP: 000000c000329470 R08: 0000000000000001 R09: 0000000000000000 [ 77.182778][ T6534] R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000014d [ 77.190735][ T6534] R13: 000000000000014c R14: 0000000000000200 R15: 000000c000674500 [ 77.198720][ T6534] ================================================================== [ 77.206760][ T6534] Disabling lock debugging due to kernel taint [ 77.224446][ T6534] Kernel panic - not syncing: panic_on_warn set ... [ 77.231157][ T6534] CPU: 1 PID: 6534 Comm: syz-fuzzer Tainted: G B 5.14.0-next-20210906-syzkaller #0 [ 77.241851][ T6534] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.251948][ T6534] Call Trace: [ 77.255231][ T6534] dump_stack_lvl+0xcd/0x134 [ 77.259840][ T6534] panic+0x2b0/0x6dd [ 77.263747][ T6534] ? __warn_printk+0xf3/0xf3 [ 77.268349][ T6534] ? preempt_schedule_common+0x59/0xc0 [ 77.273823][ T6534] ? fuse_conn_put+0x1d7/0x300 [ 77.278600][ T6534] ? preempt_schedule_thunk+0x16/0x18 [ 77.284162][ T6534] ? trace_hardirqs_on+0x38/0x1c0 [ 77.289203][ T6534] ? trace_hardirqs_on+0x51/0x1c0 [ 77.294587][ T6534] ? fuse_conn_put+0x1d7/0x300 [ 77.299358][ T6534] ? fuse_conn_put+0x1d7/0x300 [ 77.304127][ T6534] end_report.cold+0x63/0x6f [ 77.308728][ T6534] kasan_report.cold+0x71/0xdf [ 77.313670][ T6534] ? fuse_conn_put+0x1d7/0x300 [ 77.318440][ T6534] kasan_check_range+0x13d/0x180 [ 77.323402][ T6534] fuse_conn_put+0x1d7/0x300 [ 77.328000][ T6534] fuse_dev_free+0x155/0x1f0 [ 77.332606][ T6534] fuse_dev_release+0x2a8/0x3f0 [ 77.337559][ T6534] ? fuse_abort_conn+0xc90/0xc90 [ 77.342508][ T6534] ? cuse_channel_release+0x237/0x300 [ 77.347885][ T6534] __fput+0x288/0x9f0 [ 77.351882][ T6534] ? cuse_class_waiting_show+0xa0/0xa0 [ 77.357461][ T6534] task_work_run+0xdd/0x1a0 [ 77.362422][ T6534] exit_to_user_mode_prepare+0x27e/0x290 [ 77.368056][ T6534] syscall_exit_to_user_mode+0x19/0x60 [ 77.373514][ T6534] do_syscall_64+0x42/0xb0 [ 77.377952][ T6534] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 77.383850][ T6534] RIP: 0033:0x4af19b [ 77.387746][ T6534] 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 [ 77.407433][ T6534] RSP: 002b:000000c000329430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 [ 77.415952][ T6534] RAX: 0000000000000000 RBX: 000000c00001c000 RCX: 00000000004af19b [ 77.424005][ T6534] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 77.431988][ T6534] RBP: 000000c000329470 R08: 0000000000000001 R09: 0000000000000000 [ 77.439970][ T6534] R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000014d [ 77.448022][ T6534] R13: 000000000000014c R14: 0000000000000200 R15: 000000c000674500 [ 77.457702][ T6534] Kernel Offset: disabled [ 77.462032][ T6534] Rebooting in 86400 seconds..