[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 24.515707] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 28.542900] random: sshd: uninitialized urandom read (32 bytes read) [ 28.853097] random: sshd: uninitialized urandom read (32 bytes read) [ 29.467193] random: sshd: uninitialized urandom read (32 bytes read) [ 161.578028] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.10.45' (ECDSA) to the list of known hosts. [ 167.326189] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/22 06:38:00 parsed 1 programs [ 168.533407] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/22 06:38:01 executed programs: 0 [ 169.717546] IPVS: ftp: loaded support on port[0] = 21 [ 169.732383] IPVS: ftp: loaded support on port[0] = 21 [ 169.734233] IPVS: ftp: loaded support on port[0] = 21 [ 169.742828] IPVS: ftp: loaded support on port[0] = 21 [ 169.750245] IPVS: ftp: loaded support on port[0] = 21 [ 169.753847] IPVS: ftp: loaded support on port[0] = 21 [ 170.695793] bridge0: port 1(bridge_slave_0) entered blocking state [ 170.709260] bridge0: port 1(bridge_slave_0) entered disabled state [ 170.719954] device bridge_slave_0 entered promiscuous mode [ 170.745300] bridge0: port 1(bridge_slave_0) entered blocking state [ 170.759552] bridge0: port 1(bridge_slave_0) entered disabled state [ 170.766995] device bridge_slave_0 entered promiscuous mode [ 170.781807] bridge0: port 1(bridge_slave_0) entered blocking state [ 170.788177] bridge0: port 1(bridge_slave_0) entered disabled state [ 170.798134] device bridge_slave_0 entered promiscuous mode [ 170.823994] bridge0: port 1(bridge_slave_0) entered blocking state [ 170.833929] bridge0: port 1(bridge_slave_0) entered disabled state [ 170.847458] device bridge_slave_0 entered promiscuous mode [ 170.854779] bridge0: port 2(bridge_slave_1) entered blocking state [ 170.861801] bridge0: port 2(bridge_slave_1) entered disabled state [ 170.869236] device bridge_slave_1 entered promiscuous mode [ 170.890222] bridge0: port 1(bridge_slave_0) entered blocking state [ 170.898100] bridge0: port 1(bridge_slave_0) entered disabled state [ 170.911779] device bridge_slave_0 entered promiscuous mode [ 170.920701] bridge0: port 2(bridge_slave_1) entered blocking state [ 170.927101] bridge0: port 2(bridge_slave_1) entered disabled state [ 170.937923] device bridge_slave_1 entered promiscuous mode [ 170.944857] bridge0: port 2(bridge_slave_1) entered blocking state [ 170.951877] bridge0: port 2(bridge_slave_1) entered disabled state [ 170.959223] device bridge_slave_1 entered promiscuous mode [ 170.977939] bridge0: port 2(bridge_slave_1) entered blocking state [ 170.989641] bridge0: port 2(bridge_slave_1) entered disabled state [ 170.997503] device bridge_slave_1 entered promiscuous mode [ 171.004656] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 171.014849] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 171.028746] bridge0: port 1(bridge_slave_0) entered blocking state [ 171.037333] bridge0: port 1(bridge_slave_0) entered disabled state [ 171.047540] device bridge_slave_0 entered promiscuous mode [ 171.057222] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 171.066720] bridge0: port 2(bridge_slave_1) entered blocking state [ 171.073455] bridge0: port 2(bridge_slave_1) entered disabled state [ 171.080858] device bridge_slave_1 entered promiscuous mode [ 171.088173] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 171.096491] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 171.106851] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 171.118093] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 171.129901] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 171.138061] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 171.158246] bridge0: port 2(bridge_slave_1) entered blocking state [ 171.171427] bridge0: port 2(bridge_slave_1) entered disabled state [ 171.178359] device bridge_slave_1 entered promiscuous mode [ 171.192012] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 171.239727] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 171.262168] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 171.292036] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 171.305050] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 171.322166] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 171.338157] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 171.349881] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 171.361080] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 171.374577] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 171.389718] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 171.397642] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 171.408728] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 171.422839] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 171.438576] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 171.451040] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 171.475102] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 171.489885] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 171.503739] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 171.517336] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 171.531293] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 171.547253] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 171.566368] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 171.574909] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 171.594963] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 171.607855] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 171.621278] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 171.638823] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 171.651912] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 171.661777] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 171.687259] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 171.718245] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 171.737153] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 171.762682] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 171.782171] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 171.843900] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 171.852859] team0: Port device team_slave_0 added [ 171.869906] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 171.884062] team0: Port device team_slave_0 added [ 171.906323] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 171.915276] team0: Port device team_slave_0 added [ 171.947431] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 171.958608] team0: Port device team_slave_1 added [ 171.964740] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 171.974055] team0: Port device team_slave_1 added [ 171.992163] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 172.000355] team0: Port device team_slave_1 added [ 172.016152] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 172.026228] team0: Port device team_slave_0 added [ 172.040849] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 172.048198] team0: Port device team_slave_0 added [ 172.063863] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 172.088097] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 172.096872] team0: Port device team_slave_1 added [ 172.106253] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 172.117856] team0: Port device team_slave_0 added [ 172.131067] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 172.146481] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 172.161807] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 172.169958] team0: Port device team_slave_1 added [ 172.187199] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 172.197071] team0: Port device team_slave_1 added [ 172.228475] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 172.237831] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 172.249268] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 172.257511] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 172.269395] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 172.281580] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 172.292740] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 172.303449] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 172.318440] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 172.327225] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 172.335793] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 172.344404] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 172.359196] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 172.371724] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 172.380512] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 172.400117] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 172.418158] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 172.427344] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 172.438258] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 172.447281] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 172.455571] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 172.463530] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 172.473194] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 172.484577] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 172.494668] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 172.513410] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 172.530002] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 172.537961] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 172.550846] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 172.558723] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 172.573724] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 172.582826] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 172.590872] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 172.598616] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 172.612463] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 172.628917] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 172.649988] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 172.665438] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 172.680798] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 172.688633] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 172.698079] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 172.706669] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 172.715848] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 172.728333] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 172.754434] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 172.762954] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 172.783732] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 172.798153] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 172.810135] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 173.289413] bridge0: port 2(bridge_slave_1) entered blocking state [ 173.296011] bridge0: port 2(bridge_slave_1) entered forwarding state [ 173.303077] bridge0: port 1(bridge_slave_0) entered blocking state [ 173.309511] bridge0: port 1(bridge_slave_0) entered forwarding state [ 173.321828] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 173.333056] bridge0: port 2(bridge_slave_1) entered blocking state [ 173.339420] bridge0: port 2(bridge_slave_1) entered forwarding state [ 173.346145] bridge0: port 1(bridge_slave_0) entered blocking state [ 173.352558] bridge0: port 1(bridge_slave_0) entered forwarding state [ 173.361504] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 173.387375] bridge0: port 2(bridge_slave_1) entered blocking state [ 173.393806] bridge0: port 2(bridge_slave_1) entered forwarding state [ 173.400561] bridge0: port 1(bridge_slave_0) entered blocking state [ 173.406950] bridge0: port 1(bridge_slave_0) entered forwarding state [ 173.432551] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 173.444016] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 173.455292] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 173.463309] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 173.530747] bridge0: port 2(bridge_slave_1) entered blocking state [ 173.537147] bridge0: port 2(bridge_slave_1) entered forwarding state [ 173.543895] bridge0: port 1(bridge_slave_0) entered blocking state [ 173.550320] bridge0: port 1(bridge_slave_0) entered forwarding state [ 173.557938] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 173.584177] bridge0: port 2(bridge_slave_1) entered blocking state [ 173.590635] bridge0: port 2(bridge_slave_1) entered forwarding state [ 173.597295] bridge0: port 1(bridge_slave_0) entered blocking state [ 173.603722] bridge0: port 1(bridge_slave_0) entered forwarding state [ 173.614083] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 173.686509] bridge0: port 2(bridge_slave_1) entered blocking state [ 173.692916] bridge0: port 2(bridge_slave_1) entered forwarding state [ 173.699650] bridge0: port 1(bridge_slave_0) entered blocking state [ 173.706032] bridge0: port 1(bridge_slave_0) entered forwarding state [ 173.732020] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 174.481531] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 174.488853] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 174.518479] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 176.117917] 8021q: adding VLAN 0 to HW filter on device bond0 [ 176.154895] 8021q: adding VLAN 0 to HW filter on device bond0 [ 176.348933] 8021q: adding VLAN 0 to HW filter on device bond0 [ 176.373948] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 176.385381] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 176.404661] 8021q: adding VLAN 0 to HW filter on device bond0 [ 176.413427] 8021q: adding VLAN 0 to HW filter on device bond0 [ 176.441604] 8021q: adding VLAN 0 to HW filter on device bond0 [ 176.588211] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 176.650609] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 176.657089] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 176.665164] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 176.676133] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 176.688449] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 176.697373] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 176.705666] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 176.722942] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 176.739853] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 176.902797] 8021q: adding VLAN 0 to HW filter on device team0 [ 176.913257] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 176.920042] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 176.927081] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 176.951228] 8021q: adding VLAN 0 to HW filter on device team0 [ 176.995416] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 177.008761] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 177.018942] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 177.048397] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 177.055400] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 177.065343] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 177.077319] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 177.090861] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 177.097913] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 177.225791] 8021q: adding VLAN 0 to HW filter on device team0 [ 177.294473] 8021q: adding VLAN 0 to HW filter on device team0 [ 177.320708] 8021q: adding VLAN 0 to HW filter on device team0 [ 177.346797] 8021q: adding VLAN 0 to HW filter on device team0 2018/09/22 06:38:10 executed programs: 6 [ 178.601049] hrtimer: interrupt took 32480 ns 2018/09/22 06:38:17 executed programs: 34 2018/09/22 06:38:23 executed programs: 68 [ 193.775380] ================================================================== [ 193.782904] BUG: KASAN: use-after-free in __lock_acquire+0x37c2/0x4ec0 [ 193.789560] Read of size 8 at addr ffff8801b192a110 by task syz-executor0/7102 [ 193.796940] [ 193.798556] CPU: 0 PID: 7102 Comm: syz-executor0 Not tainted 4.19.0-rc4+ #249 [ 193.805809] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 193.815162] Call Trace: [ 193.817737] dump_stack+0x1c4/0x2b4 [ 193.821369] ? dump_stack_print_info.cold.2+0x52/0x52 [ 193.826563] ? printk+0xa7/0xcf [ 193.829830] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 193.834584] print_address_description.cold.8+0x9/0x1ff [ 193.839928] kasan_report.cold.9+0x242/0x309 [ 193.844324] ? __lock_acquire+0x37c2/0x4ec0 [ 193.848629] __asan_report_load8_noabort+0x14/0x20 [ 193.853545] __lock_acquire+0x37c2/0x4ec0 [ 193.857678] ? __free_pages+0x149/0x190 [ 193.861663] ? free_unref_page+0x960/0x960 [ 193.865876] ? mark_held_locks+0x130/0x130 [ 193.870088] ? kasan_check_write+0x14/0x20 [ 193.874303] ? finish_task_switch+0x616/0x900 [ 193.878875] ? __switch_to_asm+0x40/0x70 [ 193.882927] ? preempt_notifier_register+0x200/0x200 [ 193.888011] ? __switch_to_asm+0x34/0x70 [ 193.892056] ? __switch_to_asm+0x34/0x70 [ 193.896113] ? __switch_to_asm+0x40/0x70 [ 193.900157] ? __switch_to_asm+0x34/0x70 [ 193.904197] ? __switch_to_asm+0x40/0x70 [ 193.908234] ? __switch_to_asm+0x34/0x70 [ 193.912279] ? __switch_to_asm+0x40/0x70 [ 193.916328] ? __switch_to_asm+0x34/0x70 [ 193.920386] ? __switch_to_asm+0x34/0x70 [ 193.924454] ? __switch_to_asm+0x40/0x70 [ 193.928510] ? __switch_to_asm+0x34/0x70 [ 193.932740] ? __switch_to_asm+0x40/0x70 [ 193.936788] ? __switch_to_asm+0x34/0x70 [ 193.940835] ? __switch_to_asm+0x40/0x70 [ 193.944891] ? __schedule+0x874/0x1ed0 [ 193.948764] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 193.953510] ? __sched_text_start+0x8/0x8 [ 193.957642] ? graph_lock+0x170/0x170 [ 193.961432] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 193.966172] ? mark_held_locks+0xc7/0x130 [ 193.970314] lock_acquire+0x1ed/0x520 [ 193.974098] ? vhost_transport_send_pkt+0x12e/0x380 [ 193.979093] ? lock_release+0x970/0x970 [ 193.983046] ? preempt_schedule+0x4d/0x60 [ 193.987179] ? ___preempt_schedule+0x16/0x18 [ 193.991581] ? __local_bh_enable_ip+0x1a3/0x260 [ 193.996241] _raw_spin_lock_bh+0x31/0x40 [ 194.000287] ? vhost_transport_send_pkt+0x12e/0x380 [ 194.005348] vhost_transport_send_pkt+0x12e/0x380 [ 194.010177] ? vhost_vsock_dev_open+0x5a0/0x5a0 [ 194.014830] ? __local_bh_enable_ip+0x193/0x260 [ 194.019488] virtio_transport_send_pkt_info+0x31d/0x460 [ 194.024854] virtio_transport_connect+0x17c/0x220 [ 194.029699] ? virtio_transport_send_pkt_info+0x460/0x460 [ 194.035237] ? vsock_auto_bind+0xa9/0xe0 [ 194.039288] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 194.044833] vsock_stream_connect+0x4ed/0xe40 [ 194.049319] ? vsock_dgram_connect+0x500/0x500 [ 194.053890] ? finish_wait+0x430/0x430 [ 194.057763] ? aa_af_perm+0x5a0/0x5a0 [ 194.061586] ? apparmor_socket_connect+0xb6/0x160 [ 194.066427] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 194.071951] ? security_socket_connect+0x94/0xc0 [ 194.076697] __sys_connect+0x37d/0x4c0 [ 194.080585] ? retint_kernel+0x2d/0x2d [ 194.084454] ? __ia32_sys_accept+0xb0/0xb0 [ 194.088676] ? trace_hardirqs_off+0x310/0x310 [ 194.093160] ? retint_kernel+0x2d/0x2d [ 194.097033] __x64_sys_connect+0x73/0xb0 [ 194.101095] do_syscall_64+0x1b9/0x820 [ 194.104970] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 194.110339] ? syscall_return_slowpath+0x5e0/0x5e0 [ 194.115277] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 194.120132] ? trace_hardirqs_on_caller+0x310/0x310 [ 194.125144] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 194.130153] ? prepare_exit_to_usermode+0x291/0x3b0 [ 194.135280] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 194.140106] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 194.145290] RIP: 0033:0x457679 [ 194.148489] Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 194.167395] RSP: 002b:00007fff9deebf38 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 194.175100] RAX: ffffffffffffffda RBX: 000000000141d914 RCX: 0000000000457679 [ 194.182351] RDX: 0000000000000010 RSI: 0000000020000200 RDI: 0000000000000009 [ 194.189793] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 194.197062] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 194.204451] R13: 00000000004cc658 R14: 00000000004bdcb3 R15: 0000000000000000 [ 194.211715] [ 194.213339] Allocated by task 7102: [ 194.216952] save_stack+0x43/0xd0 [ 194.220384] kasan_kmalloc+0xc7/0xe0 [ 194.224093] __kmalloc_node+0x47/0x70 [ 194.227890] kvmalloc_node+0xb9/0xf0 [ 194.231623] vhost_vsock_dev_open+0xa2/0x5a0 [ 194.236141] misc_open+0x3ca/0x560 [ 194.239671] chrdev_open+0x25a/0x710 [ 194.243373] do_dentry_open+0x499/0x1250 [ 194.247576] vfs_open+0xa0/0xd0 [ 194.250842] path_openat+0x12bf/0x5160 [ 194.254741] do_filp_open+0x255/0x380 [ 194.258562] do_sys_open+0x568/0x700 [ 194.262256] __x64_sys_openat+0x9d/0x100 [ 194.266309] do_syscall_64+0x1b9/0x820 [ 194.270194] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 194.275425] [ 194.277059] Freed by task 7104: [ 194.280324] save_stack+0x43/0xd0 [ 194.283851] __kasan_slab_free+0x102/0x150 [ 194.288086] kasan_slab_free+0xe/0x10 [ 194.292001] kfree+0xcf/0x230 [ 194.295092] kvfree+0x61/0x70 [ 194.298307] vhost_vsock_dev_release+0x4f4/0x720 [ 194.303045] __fput+0x385/0xa30 [ 194.306308] ____fput+0x15/0x20 [ 194.309591] task_work_run+0x1e8/0x2a0 [ 194.313474] exit_to_usermode_loop+0x318/0x380 [ 194.318106] do_syscall_64+0x6be/0x820 [ 194.322021] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 194.327312] [ 194.328926] The buggy address belongs to the object at ffff8801b1921400 [ 194.328926] which belongs to the cache kmalloc-65536 of size 65536 [ 194.341908] The buggy address is located 36112 bytes inside of [ 194.341908] 65536-byte region [ffff8801b1921400, ffff8801b1931400) [ 194.354114] The buggy address belongs to the page: [ 194.359023] page:ffffea0006c64800 count:1 mapcount:0 mapping:ffff8801da802500 index:0x0 compound_mapcount: 0 [ 194.368969] flags: 0x2fffc0000008100(slab|head) [ 194.373635] raw: 02fffc0000008100 ffffea0006c64008 ffffea0006c69008 ffff8801da802500 [ 194.381507] raw: 0000000000000000 ffff8801b1921400 0000000100000001 0000000000000000 [ 194.389362] page dumped because: kasan: bad access detected [ 194.395044] [ 194.396644] Memory state around the buggy address: [ 194.401568] ffff8801b192a000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 194.408910] ffff8801b192a080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 194.416246] >ffff8801b192a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 194.423576] ^ [ 194.427442] ffff8801b192a180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 194.434789] ffff8801b192a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 194.442124] ================================================================== [ 194.449457] Disabling lock debugging due to kernel taint [ 194.454882] Kernel panic - not syncing: panic_on_warn set ... [ 194.454882] [ 194.462224] CPU: 0 PID: 7102 Comm: syz-executor0 Tainted: G B 4.19.0-rc4+ #249 [ 194.470969] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 194.480301] Call Trace: [ 194.482876] dump_stack+0x1c4/0x2b4 [ 194.486489] ? dump_stack_print_info.cold.2+0x52/0x52 [ 194.491658] ? lock_downgrade+0x900/0x900 [ 194.495790] panic+0x238/0x4e7 [ 194.498963] ? add_taint.cold.5+0x16/0x16 [ 194.503087] ? add_taint.cold.5+0x5/0x16 [ 194.507130] ? trace_hardirqs_off+0xaf/0x310 [ 194.511521] kasan_end_report+0x47/0x4f [ 194.515479] kasan_report.cold.9+0x76/0x309 [ 194.519799] ? __lock_acquire+0x37c2/0x4ec0 [ 194.524105] __asan_report_load8_noabort+0x14/0x20 [ 194.529015] __lock_acquire+0x37c2/0x4ec0 [ 194.533143] ? __free_pages+0x149/0x190 [ 194.537104] ? free_unref_page+0x960/0x960 [ 194.541323] ? mark_held_locks+0x130/0x130 [ 194.545537] ? kasan_check_write+0x14/0x20 [ 194.549767] ? finish_task_switch+0x616/0x900 [ 194.554264] ? __switch_to_asm+0x40/0x70 [ 194.558303] ? preempt_notifier_register+0x200/0x200 [ 194.563382] ? __switch_to_asm+0x34/0x70 [ 194.567510] ? __switch_to_asm+0x34/0x70 [ 194.571572] ? __switch_to_asm+0x40/0x70 [ 194.575612] ? __switch_to_asm+0x34/0x70 [ 194.579694] ? __switch_to_asm+0x40/0x70 [ 194.583743] ? __switch_to_asm+0x34/0x70 [ 194.587791] ? __switch_to_asm+0x40/0x70 [ 194.591829] ? __switch_to_asm+0x34/0x70 [ 194.595868] ? __switch_to_asm+0x34/0x70 [ 194.599906] ? __switch_to_asm+0x40/0x70 [ 194.603950] ? __switch_to_asm+0x34/0x70 [ 194.607989] ? __switch_to_asm+0x40/0x70 [ 194.612029] ? __switch_to_asm+0x34/0x70 [ 194.616101] ? __switch_to_asm+0x40/0x70 [ 194.620147] ? __schedule+0x874/0x1ed0 [ 194.624014] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 194.628783] ? __sched_text_start+0x8/0x8 [ 194.632910] ? graph_lock+0x170/0x170 [ 194.636688] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 194.641423] ? mark_held_locks+0xc7/0x130 [ 194.645548] lock_acquire+0x1ed/0x520 [ 194.649328] ? vhost_transport_send_pkt+0x12e/0x380 [ 194.654322] ? lock_release+0x970/0x970 [ 194.658273] ? preempt_schedule+0x4d/0x60 [ 194.662399] ? ___preempt_schedule+0x16/0x18 [ 194.666831] ? __local_bh_enable_ip+0x1a3/0x260 [ 194.671478] _raw_spin_lock_bh+0x31/0x40 [ 194.675519] ? vhost_transport_send_pkt+0x12e/0x380 [ 194.680525] vhost_transport_send_pkt+0x12e/0x380 [ 194.685345] ? vhost_vsock_dev_open+0x5a0/0x5a0 [ 194.689998] ? __local_bh_enable_ip+0x193/0x260 [ 194.694647] virtio_transport_send_pkt_info+0x31d/0x460 [ 194.700003] virtio_transport_connect+0x17c/0x220 [ 194.704839] ? virtio_transport_send_pkt_info+0x460/0x460 [ 194.710355] ? vsock_auto_bind+0xa9/0xe0 [ 194.714397] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 194.719915] vsock_stream_connect+0x4ed/0xe40 [ 194.724393] ? vsock_dgram_connect+0x500/0x500 [ 194.728956] ? finish_wait+0x430/0x430 [ 194.732827] ? aa_af_perm+0x5a0/0x5a0 [ 194.736619] ? apparmor_socket_connect+0xb6/0x160 [ 194.741441] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 194.746958] ? security_socket_connect+0x94/0xc0 [ 194.751692] __sys_connect+0x37d/0x4c0 [ 194.755557] ? retint_kernel+0x2d/0x2d [ 194.759425] ? __ia32_sys_accept+0xb0/0xb0 [ 194.763647] ? trace_hardirqs_off+0x310/0x310 [ 194.768135] ? retint_kernel+0x2d/0x2d [ 194.772006] __x64_sys_connect+0x73/0xb0 [ 194.776048] do_syscall_64+0x1b9/0x820 [ 194.779918] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 194.785373] ? syscall_return_slowpath+0x5e0/0x5e0 [ 194.790284] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 194.795112] ? trace_hardirqs_on_caller+0x310/0x310 [ 194.800118] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 194.800708] kobject: 'loop3' (000000006343706d): kobject_uevent_env [ 194.805130] ? prepare_exit_to_usermode+0x291/0x3b0 [ 194.814002] kobject: 'loop3' (000000006343706d): fill_kobj_path: path = '/devices/virtual/block/loop3' [ 194.816531] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 194.816542] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 194.816548] RIP: 0033:0x457679 [ 194.816564] Code: 1d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 194.848601] kobject: 'loop2' (0000000082383b60): kobject_uevent_env [ 194.858146] RSP: 002b:00007fff9deebf38 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 194.858156] RAX: ffffffffffffffda RBX: 000000000141d914 RCX: 0000000000457679 [ 194.858160] RDX: 0000000000000010 RSI: 0000000020000200 RDI: 0000000000000009 [ 194.858165] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 194.858169] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff [ 194.858178] R13: 00000000004cc658 R14: 00000000004bdcb3 R15: 0000000000000000 [ 194.865494] Kernel Offset: disabled [ 194.913058] Rebooting in 86400 seconds..