Starting Load/Save RF Kill Switch Status... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.92' (ECDSA) to the list of known hosts. 2021/09/02 12:16:20 fuzzer started 2021/09/02 12:16:20 connecting to host at 10.128.0.169:33585 2021/09/02 12:16:20 checking machine... 2021/09/02 12:16:20 checking revisions... 2021/09/02 12:16:20 testing simple program... syzkaller login: [ 73.276123][ T6561] chnl_net:caif_netlink_parms(): no params data found [ 73.360342][ T6561] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.372013][ T6561] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.380477][ T6561] device bridge_slave_0 entered promiscuous mode [ 73.389631][ T6561] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.398589][ T6561] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.406618][ T6561] device bridge_slave_1 entered promiscuous mode [ 73.439241][ T6561] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.452481][ T6561] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.488719][ T6561] team0: Port device team_slave_0 added [ 73.496847][ T6561] team0: Port device team_slave_1 added [ 73.525006][ T6561] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.532833][ T6561] 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. [ 73.560322][ T6561] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.573953][ T6561] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.582579][ T6561] 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. [ 73.613640][ T6561] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 73.651707][ T6561] device hsr_slave_0 entered promiscuous mode [ 73.659733][ T6561] device hsr_slave_1 entered promiscuous mode [ 73.792726][ T6561] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.807443][ T6561] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.817708][ T6561] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.829309][ T6561] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.866892][ T6561] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.874320][ T6561] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.882180][ T6561] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.889512][ T6561] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.937562][ T6561] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.953288][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.964946][ T144] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.975359][ T144] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.983814][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 73.998610][ T6561] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.012759][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.021661][ T2954] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.028703][ T2954] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.051570][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.060059][ T2954] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.067740][ T2954] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.076189][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.089269][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.098385][ T2954] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.113259][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.127475][ T6561] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 74.140320][ T6561] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.154188][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.173238][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.181349][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.196281][ T6561] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.217364][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.239909][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.248910][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.258389][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.272391][ T6561] device veth0_vlan entered promiscuous mode [ 74.285471][ T6561] device veth1_vlan entered promiscuous mode [ 74.311400][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 74.322382][ T1052] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.335925][ T6561] device veth0_macvtap entered promiscuous mode [ 74.347006][ T6561] device veth1_macvtap entered promiscuous mode [ 74.364798][ T6561] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 74.379559][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 74.388632][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 74.397719][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 74.407266][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 74.419926][ T6561] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 74.428079][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 74.436692][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 74.450126][ T6561] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.460818][ T6561] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.469904][ T6561] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.482104][ T6561] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 executing program [ 74.582579][ T160] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.596616][ T160] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.626420][ T6895] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.649590][ T160] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.657916][ T160] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.668608][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/09/02 12:16:23 building call list... [ 77.133520][ T1394] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 executing program [ 77.843505][ T6554] ================================================================== [ 77.852158][ T6554] BUG: KASAN: null-ptr-deref in fuse_conn_put+0x1d7/0x300 [ 77.859563][ T6554] Read of size 4 at addr 0000000000000000 by task syz-fuzzer/6554 [ 77.867460][ T6554] [ 77.869977][ T6554] CPU: 0 PID: 6554 Comm: syz-fuzzer Not tainted 5.14.0-next-20210902-syzkaller #0 [ 77.879465][ T6554] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 77.890044][ T6554] Call Trace: [ 77.893604][ T6554] dump_stack_lvl+0xcd/0x134 [ 77.898572][ T6554] kasan_report.cold+0x66/0xdf [ 77.903560][ T6554] ? fuse_conn_put+0x1d7/0x300 [ 77.908336][ T6554] kasan_check_range+0x13d/0x180 [ 77.913291][ T6554] fuse_conn_put+0x1d7/0x300 [ 77.918255][ T6554] fuse_dev_free+0x155/0x1f0 [ 77.922867][ T6554] fuse_dev_release+0x2a8/0x3f0 [ 77.927784][ T6554] ? fuse_abort_conn+0xc90/0xc90 [ 77.932733][ T6554] ? cuse_channel_release+0x237/0x300 [ 77.938468][ T6554] __fput+0x288/0x9f0 [ 77.942458][ T6554] ? cuse_class_waiting_show+0xa0/0xa0 [ 77.948277][ T6554] task_work_run+0xdd/0x1a0 [ 77.952801][ T6554] exit_to_user_mode_prepare+0x27e/0x290 [ 77.958529][ T6554] syscall_exit_to_user_mode+0x19/0x60 [ 77.963995][ T6554] do_syscall_64+0x42/0xb0 [ 77.968599][ T6554] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 77.974782][ T6554] RIP: 0033:0x4af19b [ 77.979055][ T6554] 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 [ 78.000224][ T6554] RSP: 002b:000000c0005e9430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 [ 78.008855][ T6554] RAX: 0000000000000000 RBX: 000000c00001c000 RCX: 00000000004af19b [ 78.016918][ T6554] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 78.025164][ T6554] RBP: 000000c0005e9470 R08: 0000000000000001 R09: 0000000000000000 [ 78.033317][ T6554] R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000014b [ 78.041326][ T6554] R13: 000000000000014a R14: 0000000000000200 R15: 000000c00029c3c0 [ 78.049328][ T6554] ================================================================== [ 78.057491][ T6554] Disabling lock debugging due to kernel taint [ 78.066172][ T6554] Kernel panic - not syncing: panic_on_warn set ... [ 78.072934][ T6554] CPU: 0 PID: 6554 Comm: syz-fuzzer Tainted: G B 5.14.0-next-20210902-syzkaller #0 [ 78.084009][ T6554] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 78.096244][ T6554] Call Trace: [ 78.100072][ T6554] dump_stack_lvl+0xcd/0x134 [ 78.105017][ T6554] panic+0x2b0/0x6dd [ 78.109522][ T6554] ? __warn_printk+0xf3/0xf3 [ 78.114501][ T6554] ? preempt_schedule_common+0x59/0xc0 [ 78.119981][ T6554] ? fuse_conn_put+0x1d7/0x300 [ 78.124848][ T6554] ? preempt_schedule_thunk+0x16/0x18 [ 78.130403][ T6554] ? trace_hardirqs_on+0x38/0x1c0 [ 78.135554][ T6554] ? trace_hardirqs_on+0x51/0x1c0 [ 78.140780][ T6554] ? fuse_conn_put+0x1d7/0x300 [ 78.145727][ T6554] ? fuse_conn_put+0x1d7/0x300 [ 78.150903][ T6554] end_report.cold+0x63/0x6f [ 78.155765][ T6554] kasan_report.cold+0x71/0xdf [ 78.161268][ T6554] ? fuse_conn_put+0x1d7/0x300 [ 78.166321][ T6554] kasan_check_range+0x13d/0x180 [ 78.171467][ T6554] fuse_conn_put+0x1d7/0x300 [ 78.176237][ T6554] fuse_dev_free+0x155/0x1f0 [ 78.186412][ T6554] fuse_dev_release+0x2a8/0x3f0 [ 78.192358][ T6554] ? fuse_abort_conn+0xc90/0xc90 [ 78.197782][ T6554] ? cuse_channel_release+0x237/0x300 [ 78.203422][ T6554] __fput+0x288/0x9f0 [ 78.210792][ T6554] ? cuse_class_waiting_show+0xa0/0xa0 [ 78.216357][ T6554] task_work_run+0xdd/0x1a0 [ 78.220865][ T6554] exit_to_user_mode_prepare+0x27e/0x290 [ 78.226706][ T6554] syscall_exit_to_user_mode+0x19/0x60 [ 78.232190][ T6554] do_syscall_64+0x42/0xb0 [ 78.237241][ T6554] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 78.243985][ T6554] RIP: 0033:0x4af19b [ 78.249181][ T6554] 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 [ 78.271212][ T6554] RSP: 002b:000000c0005e9430 EFLAGS: 00000206 ORIG_RAX: 0000000000000003 [ 78.280160][ T6554] RAX: 0000000000000000 RBX: 000000c00001c000 RCX: 00000000004af19b [ 78.288511][ T6554] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 78.296686][ T6554] RBP: 000000c0005e9470 R08: 0000000000000001 R09: 0000000000000000 [ 78.304987][ T6554] R10: 0000000000000000 R11: 0000000000000206 R12: 000000000000014b [ 78.313149][ T6554] R13: 000000000000014a R14: 0000000000000200 R15: 000000c00029c3c0 [ 78.324791][ T6554] Kernel Offset: disabled [ 78.331085][ T6554] Rebooting in 86400 seconds..