[....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 28.451756] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 32.105109] random: sshd: uninitialized urandom read (32 bytes read) [ 32.509877] random: sshd: uninitialized urandom read (32 bytes read) [ 33.127185] random: sshd: uninitialized urandom read (32 bytes read) [ 172.291517] random: sshd: uninitialized urandom read (32 bytes read) Warning: Permanently added '10.128.0.121' (ECDSA) to the list of known hosts. [ 177.872303] random: sshd: uninitialized urandom read (32 bytes read) 2018/09/21 09:02:47 parsed 1 programs [ 179.145120] random: cc1: uninitialized urandom read (8 bytes read) 2018/09/21 09:02:49 executed programs: 0 [ 180.372689] IPVS: ftp: loaded support on port[0] = 21 [ 180.382763] IPVS: ftp: loaded support on port[0] = 21 [ 180.385060] IPVS: ftp: loaded support on port[0] = 21 [ 180.393348] IPVS: ftp: loaded support on port[0] = 21 [ 180.409553] IPVS: ftp: loaded support on port[0] = 21 [ 180.417624] IPVS: ftp: loaded support on port[0] = 21 [ 180.778736] ip (5506) used greatest stack depth: 16104 bytes left [ 181.231275] bridge0: port 1(bridge_slave_0) entered blocking state [ 181.242853] bridge0: port 1(bridge_slave_0) entered disabled state [ 181.250986] device bridge_slave_0 entered promiscuous mode [ 181.260666] bridge0: port 1(bridge_slave_0) entered blocking state [ 181.267469] bridge0: port 1(bridge_slave_0) entered disabled state [ 181.274809] device bridge_slave_0 entered promiscuous mode [ 181.294028] bridge0: port 2(bridge_slave_1) entered blocking state [ 181.301488] bridge0: port 2(bridge_slave_1) entered disabled state [ 181.308944] device bridge_slave_1 entered promiscuous mode [ 181.327811] bridge0: port 1(bridge_slave_0) entered blocking state [ 181.334184] bridge0: port 1(bridge_slave_0) entered disabled state [ 181.344615] device bridge_slave_0 entered promiscuous mode [ 181.356247] bridge0: port 2(bridge_slave_1) entered blocking state [ 181.362679] bridge0: port 2(bridge_slave_1) entered disabled state [ 181.371277] device bridge_slave_1 entered promiscuous mode [ 181.378335] bridge0: port 1(bridge_slave_0) entered blocking state [ 181.385712] bridge0: port 1(bridge_slave_0) entered disabled state [ 181.392688] device bridge_slave_0 entered promiscuous mode [ 181.400720] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 181.410647] bridge0: port 1(bridge_slave_0) entered blocking state [ 181.417519] bridge0: port 1(bridge_slave_0) entered disabled state [ 181.425376] device bridge_slave_0 entered promiscuous mode [ 181.432373] bridge0: port 1(bridge_slave_0) entered blocking state [ 181.441707] bridge0: port 1(bridge_slave_0) entered disabled state [ 181.449084] device bridge_slave_0 entered promiscuous mode [ 181.456250] bridge0: port 2(bridge_slave_1) entered blocking state [ 181.462690] bridge0: port 2(bridge_slave_1) entered disabled state [ 181.469795] device bridge_slave_1 entered promiscuous mode [ 181.476607] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 181.485541] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 181.495932] bridge0: port 2(bridge_slave_1) entered blocking state [ 181.502266] bridge0: port 2(bridge_slave_1) entered disabled state [ 181.510716] device bridge_slave_1 entered promiscuous mode [ 181.519115] bridge0: port 2(bridge_slave_1) entered blocking state [ 181.526928] bridge0: port 2(bridge_slave_1) entered disabled state [ 181.533932] device bridge_slave_1 entered promiscuous mode [ 181.540924] bridge0: port 2(bridge_slave_1) entered blocking state [ 181.548673] bridge0: port 2(bridge_slave_1) entered disabled state [ 181.556174] device bridge_slave_1 entered promiscuous mode [ 181.568915] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 181.580759] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 181.590452] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 181.600771] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 181.622746] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 181.636575] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 181.645155] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 181.660257] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 181.668814] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 181.686989] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 181.708735] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 181.780653] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 181.800409] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 181.822626] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 181.844177] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 181.869588] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 181.896573] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 181.916157] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 181.940439] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 181.955584] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 181.995824] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 182.017201] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 182.024937] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 182.058074] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 182.068902] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 182.080946] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 182.091596] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 182.101896] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 182.110297] team0: Port device team_slave_0 added [ 182.128126] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 182.136698] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 182.149437] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 182.157965] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 182.177696] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 182.201663] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 182.240178] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 182.251453] team0: Port device team_slave_0 added [ 182.290059] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 182.303224] team0: Port device team_slave_1 added [ 182.312539] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 182.323130] team0: Port device team_slave_1 added [ 182.344826] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 182.359728] team0: Port device team_slave_0 added [ 182.394994] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 182.405197] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 182.414050] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 182.428559] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 182.439173] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 182.459983] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 182.470861] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 182.478668] team0: Port device team_slave_0 added [ 182.487687] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 182.496309] team0: Port device team_slave_0 added [ 182.503870] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 182.513593] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 182.521387] team0: Port device team_slave_1 added [ 182.531952] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 182.541567] team0: Port device team_slave_0 added [ 182.550398] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 182.565505] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 182.578338] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 182.590076] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 182.597872] team0: Port device team_slave_1 added [ 182.606081] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 182.618630] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 182.626853] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 182.636530] team0: Port device team_slave_1 added [ 182.646064] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 182.656650] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 182.665181] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 182.682978] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 182.697397] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 182.706153] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 182.713489] team0: Port device team_slave_1 added [ 182.734709] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 182.749790] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 182.765050] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 182.775792] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 182.783354] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 182.791908] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 182.803704] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 182.813814] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 182.836614] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 182.851893] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 182.867357] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 182.876939] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 182.893418] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 182.901504] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 182.915280] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 182.939750] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 182.949805] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 182.980998] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 182.990066] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 183.000265] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 183.010484] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 183.021690] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 183.030225] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 183.044101] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 183.053144] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 183.062173] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 183.085240] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 183.094527] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 183.119322] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 183.154933] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 183.163864] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 183.186417] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 183.196557] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 183.203650] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 183.225171] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 183.233067] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 183.242069] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 183.799326] bridge0: port 2(bridge_slave_1) entered blocking state [ 183.805873] bridge0: port 2(bridge_slave_1) entered forwarding state [ 183.812803] bridge0: port 1(bridge_slave_0) entered blocking state [ 183.819247] bridge0: port 1(bridge_slave_0) entered forwarding state [ 183.827057] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 183.845270] bridge0: port 2(bridge_slave_1) entered blocking state [ 183.851655] bridge0: port 2(bridge_slave_1) entered forwarding state [ 183.858398] bridge0: port 1(bridge_slave_0) entered blocking state [ 183.864828] bridge0: port 1(bridge_slave_0) entered forwarding state [ 183.900086] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 183.919546] bridge0: port 2(bridge_slave_1) entered blocking state [ 183.925977] bridge0: port 2(bridge_slave_1) entered forwarding state [ 183.932632] bridge0: port 1(bridge_slave_0) entered blocking state [ 183.939070] bridge0: port 1(bridge_slave_0) entered forwarding state [ 183.955815] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 183.967370] bridge0: port 2(bridge_slave_1) entered blocking state [ 183.973736] bridge0: port 2(bridge_slave_1) entered forwarding state [ 183.980442] bridge0: port 1(bridge_slave_0) entered blocking state [ 183.986876] bridge0: port 1(bridge_slave_0) entered forwarding state [ 184.000235] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 184.018795] bridge0: port 2(bridge_slave_1) entered blocking state [ 184.025211] bridge0: port 2(bridge_slave_1) entered forwarding state [ 184.031874] bridge0: port 1(bridge_slave_0) entered blocking state [ 184.038296] bridge0: port 1(bridge_slave_0) entered forwarding state [ 184.048483] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 184.059473] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 184.075060] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 184.082335] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 184.099181] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 184.108285] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 184.163052] bridge0: port 2(bridge_slave_1) entered blocking state [ 184.169483] bridge0: port 2(bridge_slave_1) entered forwarding state [ 184.176208] bridge0: port 1(bridge_slave_0) entered blocking state [ 184.182573] bridge0: port 1(bridge_slave_0) entered forwarding state [ 184.196953] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 185.126661] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 186.812621] 8021q: adding VLAN 0 to HW filter on device bond0 [ 186.888699] 8021q: adding VLAN 0 to HW filter on device bond0 [ 186.908727] 8021q: adding VLAN 0 to HW filter on device bond0 [ 186.934875] 8021q: adding VLAN 0 to HW filter on device bond0 [ 186.945526] 8021q: adding VLAN 0 to HW filter on device bond0 [ 186.985361] 8021q: adding VLAN 0 to HW filter on device bond0 [ 187.081798] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 187.141458] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 187.172630] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 187.237225] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 187.262253] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 187.323625] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 187.386557] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 187.405633] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 187.420891] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 187.456749] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 187.471441] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 187.479017] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 187.527084] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 187.534826] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 187.541951] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 187.560991] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 187.583446] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 187.594901] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 187.616409] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 187.625975] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 187.632115] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 187.646443] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 187.653520] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 187.668933] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 187.741770] 8021q: adding VLAN 0 to HW filter on device team0 [ 187.757003] 8021q: adding VLAN 0 to HW filter on device team0 [ 187.833335] 8021q: adding VLAN 0 to HW filter on device team0 [ 187.870669] 8021q: adding VLAN 0 to HW filter on device team0 [ 187.909404] 8021q: adding VLAN 0 to HW filter on device team0 [ 187.943599] 8021q: adding VLAN 0 to HW filter on device team0 [ 189.414767] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/l1tf.html for details. 2018/09/21 09:02:58 executed programs: 6 2018/09/21 09:03:03 executed programs: 178 2018/09/21 09:03:08 executed programs: 355 2018/09/21 09:03:13 executed programs: 533 2018/09/21 09:03:18 executed programs: 713 2018/09/21 09:03:23 executed programs: 891 2018/09/21 09:03:28 executed programs: 1066 2018/09/21 09:03:33 executed programs: 1253 2018/09/21 09:03:38 executed programs: 1433 2018/09/21 09:03:43 executed programs: 1615 2018/09/21 09:03:48 executed programs: 1796 [ 240.378411] ================================================================== [ 240.387348] BUG: KASAN: use-after-free in finish_task_switch+0x5a5/0x900 [ 240.394214] Read of size 8 at addr ffff8801be250b18 by task syz-executor4/12580 [ 240.394220] [ 240.394235] CPU: 0 PID: 12580 Comm: syz-executor4 Not tainted 4.19.0-rc4+ #25 [ 240.394243] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 240.394249] Call Trace: [ 240.394268] dump_stack+0x1c4/0x2b4 [ 240.394285] ? dump_stack_print_info.cold.2+0x52/0x52 [ 240.394301] ? printk+0xa7/0xcf [ 240.394317] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 240.394342] print_address_description.cold.8+0x9/0x1ff [ 240.394360] kasan_report.cold.9+0x242/0x309 [ 240.420068] ? finish_task_switch+0x5a5/0x900 [ 240.426267] __asan_report_load8_noabort+0x14/0x20 [ 240.426283] finish_task_switch+0x5a5/0x900 [ 240.426299] ? __switch_to_asm+0x40/0x70 [ 240.426310] ? __switch_to_asm+0x34/0x70 [ 240.426328] ? preempt_notifier_register+0x200/0x200 [ 240.426340] ? __switch_to_asm+0x34/0x70 [ 240.426353] ? __switch_to_asm+0x34/0x70 [ 240.426364] ? __switch_to_asm+0x40/0x70 [ 240.426374] ? __switch_to_asm+0x34/0x70 [ 240.426385] ? __switch_to_asm+0x40/0x70 [ 240.426402] ? __switch_to_asm+0x34/0x70 [ 240.500542] ? __switch_to_asm+0x40/0x70 [ 240.504605] ? __switch_to_asm+0x34/0x70 [ 240.508673] ? __switch_to_asm+0x34/0x70 [ 240.512734] ? __switch_to_asm+0x40/0x70 [ 240.516794] ? __switch_to_asm+0x34/0x70 [ 240.520867] ? __switch_to_asm+0x40/0x70 [ 240.524937] ? __switch_to_asm+0x34/0x70 [ 240.529007] ? __switch_to_asm+0x40/0x70 [ 240.533122] __schedule+0x874/0x1ed0 [ 240.536881] ? __sched_text_start+0x8/0x8 [ 240.541040] ? graph_lock+0x170/0x170 [ 240.544852] ? plist_check_list+0xa0/0xa0 [ 240.549014] ? __schedule+0x874/0x1ed0 [ 240.552938] ? find_held_lock+0x36/0x1c0 [ 240.557014] schedule+0xfe/0x460 [ 240.560383] ? lock_downgrade+0x900/0x900 [ 240.564621] ? __schedule+0x1ed0/0x1ed0 [ 240.568608] ? kasan_check_read+0x11/0x20 [ 240.572791] ? do_raw_spin_unlock+0xa7/0x2f0 [ 240.577213] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 240.581794] ? lock_acquire+0x1ed/0x520 [ 240.585783] futex_wait_queue_me+0x3f9/0x840 [ 240.590201] ? refill_pi_state_cache.part.9+0x320/0x320 [ 240.595574] ? kasan_check_write+0x14/0x20 [ 240.599814] ? do_raw_spin_lock+0xc1/0x200 [ 240.604062] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 240.609608] ? get_futex_value_locked+0xcb/0xf0 [ 240.614282] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 240.619305] ? futex_wait_setup+0x266/0x3e0 [ 240.623635] ? futex_wake+0x760/0x760 [ 240.627437] ? futex_wake+0x613/0x760 [ 240.631247] futex_wait+0x45c/0xa50 [ 240.634889] ? futex_wait_setup+0x3e0/0x3e0 [ 240.639215] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 240.644413] ? drop_futex_key_refs.isra.15+0x6d/0xe0 [ 240.649523] ? futex_wake+0x304/0x760 [ 240.653351] ? rcu_pm_notify+0xc0/0xc0 [ 240.657260] do_futex+0x31a/0x26d0 [ 240.660812] ? kvm_vcpu_ioctl+0x2a1/0x1150 [ 240.665069] ? exit_robust_list+0x280/0x280 [ 240.669395] ? find_held_lock+0x36/0x1c0 [ 240.673466] ? __fget+0x4aa/0x740 [ 240.676922] ? lock_downgrade+0x900/0x900 [ 240.681078] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 240.686885] ? kasan_check_read+0x11/0x20 [ 240.691038] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 240.696321] ? rcu_bh_qs+0xc0/0xc0 [ 240.699878] ? __fget+0x4d1/0x740 [ 240.703341] ? ksys_dup3+0x680/0x680 [ 240.707078] ? kvm_vcpu_block+0x1030/0x1030 [ 240.711410] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 240.716960] ? do_vfs_ioctl+0x201/0x1720 [ 240.721032] ? ioctl_preallocate+0x300/0x300 [ 240.725451] ? __fget_light+0x2e9/0x430 [ 240.729434] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 240.734979] ? smack_file_ioctl+0x210/0x3c0 [ 240.739307] ? fget_raw+0x20/0x20 [ 240.742770] ? smack_file_lock+0x2e0/0x2e0 [ 240.747020] __x64_sys_futex+0x472/0x6a0 [ 240.751100] ? do_futex+0x26d0/0x26d0 [ 240.754910] ? trace_hardirqs_on+0xbd/0x310 [ 240.759240] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 240.764785] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 240.770159] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 240.775646] ? ksys_ioctl+0x81/0xd0 [ 240.779288] do_syscall_64+0x1b9/0x820 [ 240.783187] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 240.788565] ? syscall_return_slowpath+0x5e0/0x5e0 [ 240.793511] ? trace_hardirqs_on_caller+0x310/0x310 [ 240.798562] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 240.803607] ? recalc_sigpending_tsk+0x180/0x180 [ 240.808380] ? kasan_check_write+0x14/0x20 [ 240.812635] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 240.817494] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 240.822692] RIP: 0033:0x457679 [ 240.825896] 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 [ 240.845055] RSP: 002b:00007f1bd7bf8cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 240.852797] RAX: ffffffffffffffda RBX: 000000000072bfa8 RCX: 0000000000457679 [ 240.860080] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000072bfa8 [ 240.867354] RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 [ 240.874622] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072bfac [ 240.881890] R13: 00007ffdd3b93a3f R14: 00007f1bd7bf99c0 R15: 0000000000000001 [ 240.889172] [ 240.890796] Allocated by task 12573: [ 240.894532] save_stack+0x43/0xd0 [ 240.898015] kasan_kmalloc+0xc7/0xe0 [ 240.901728] kasan_slab_alloc+0x12/0x20 [ 240.905744] kmem_cache_alloc+0x12e/0x730 [ 240.909892] vmx_create_vcpu+0xcf/0x25e0 [ 240.913953] kvm_arch_vcpu_create+0xe5/0x220 [ 240.918359] kvm_vm_ioctl+0x470/0x1d40 [ 240.922247] do_vfs_ioctl+0x1de/0x1720 [ 240.926130] ksys_ioctl+0xa9/0xd0 [ 240.929583] __x64_sys_ioctl+0x73/0xb0 [ 240.933484] do_syscall_64+0x1b9/0x820 [ 240.937375] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 240.942780] [ 240.944402] Freed by task 12564: [ 240.947766] save_stack+0x43/0xd0 [ 240.951216] __kasan_slab_free+0x102/0x150 [ 240.955450] kasan_slab_free+0xe/0x10 [ 240.959281] kmem_cache_free+0x83/0x290 [ 240.963253] vmx_free_vcpu+0x26b/0x300 [ 240.967154] kvm_arch_destroy_vm+0x365/0x7c0 [ 240.971560] kvm_put_kvm+0x6c8/0xff0 [ 240.975271] kvm_vcpu_release+0x7b/0xa0 [ 240.979243] __fput+0x385/0xa30 [ 240.982521] ____fput+0x15/0x20 [ 240.985803] task_work_run+0x1e8/0x2a0 [ 240.989703] exit_to_usermode_loop+0x318/0x380 [ 240.994300] do_syscall_64+0x6be/0x820 [ 240.998230] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 241.003412] [ 241.005043] The buggy address belongs to the object at ffff8801be250b00 [ 241.005043] which belongs to the cache kvm_vcpu(17:syz4) of size 23872 [ 241.018442] The buggy address is located 24 bytes inside of [ 241.018442] 23872-byte region [ffff8801be250b00, ffff8801be256840) [ 241.030440] The buggy address belongs to the page: [ 241.035398] page:ffffea0006f89400 count:1 mapcount:0 mapping:ffff8801baaaa480 index:0x0 compound_mapcount: 0 [ 241.045413] flags: 0x2fffc0000008100(slab|head) [ 241.050116] raw: 02fffc0000008100 ffffea0007014808 ffffea0006df2a08 ffff8801baaaa480 [ 241.058049] raw: 0000000000000000 ffff8801be250b00 0000000100000001 ffff8801ccb4c940 [ 241.065928] page dumped because: kasan: bad access detected [ 241.071651] page->mem_cgroup:ffff8801ccb4c940 [ 241.076135] [ 241.077759] Memory state around the buggy address: [ 241.082702] ffff8801be250a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 241.090061] ffff8801be250a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 241.097428] >ffff8801be250b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 241.104786] ^ [ 241.109133] ffff8801be250b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 241.116503] ffff8801be250c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 241.123919] ================================================================== [ 241.131286] Disabling lock debugging due to kernel taint [ 241.137339] Kernel panic - not syncing: panic_on_warn set ... [ 241.137339] [ 241.144732] CPU: 0 PID: 12580 Comm: syz-executor4 Tainted: G B 4.19.0-rc4+ #25 [ 241.144743] kobject: 'loop1' (000000004db1b312): kobject_uevent_env [ 241.144775] kobject: 'loop1' (000000004db1b312): fill_kobj_path: path = '/devices/virtual/block/loop1' [ 241.153409] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 241.153414] Call Trace: [ 241.153437] dump_stack+0x1c4/0x2b4 [ 241.153456] ? dump_stack_print_info.cold.2+0x52/0x52 [ 241.190074] ? trace_hardirqs_on_thunk+0x1a/0x1c [ 241.194879] panic+0x238/0x4e7 [ 241.198082] ? add_taint.cold.5+0x16/0x16 [ 241.202252] ? trace_hardirqs_on+0xb4/0x310 [ 241.206606] kasan_end_report+0x47/0x4f [ 241.210592] kasan_report.cold.9+0x76/0x309 [ 241.214934] ? finish_task_switch+0x5a5/0x900 [ 241.219467] __asan_report_load8_noabort+0x14/0x20 [ 241.224410] finish_task_switch+0x5a5/0x900 [ 241.228745] ? __switch_to_asm+0x40/0x70 [ 241.232812] ? __switch_to_asm+0x34/0x70 [ 241.236897] ? preempt_notifier_register+0x200/0x200 [ 241.242011] ? __switch_to_asm+0x34/0x70 [ 241.246082] ? __switch_to_asm+0x34/0x70 [ 241.250171] ? __switch_to_asm+0x40/0x70 [ 241.254241] ? __switch_to_asm+0x34/0x70 [ 241.258311] ? __switch_to_asm+0x40/0x70 [ 241.262380] ? __switch_to_asm+0x34/0x70 [ 241.266450] ? __switch_to_asm+0x40/0x70 [ 241.270520] ? __switch_to_asm+0x34/0x70 [ 241.274588] ? __switch_to_asm+0x34/0x70 [ 241.275127] kobject: 'kvm' (0000000098157298): kobject_uevent_env [ 241.278651] ? __switch_to_asm+0x40/0x70 [ 241.278664] ? __switch_to_asm+0x34/0x70 [ 241.278675] ? __switch_to_asm+0x40/0x70 [ 241.278687] ? __switch_to_asm+0x34/0x70 [ 241.278703] ? __switch_to_asm+0x40/0x70 [ 241.292205] kobject: 'kvm' (0000000098157298): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 241.293050] __schedule+0x874/0x1ed0 [ 241.317952] ? __sched_text_start+0x8/0x8 [ 241.320038] kobject: 'loop0' (00000000d91a790a): kobject_uevent_env [ 241.322123] ? graph_lock+0x170/0x170 [ 241.330704] kobject: 'loop0' (00000000d91a790a): fill_kobj_path: path = '/devices/virtual/block/loop0' [ 241.332313] ? plist_check_list+0xa0/0xa0 [ 241.332331] ? __schedule+0x874/0x1ed0 [ 241.332358] ? find_held_lock+0x36/0x1c0 [ 241.353944] schedule+0xfe/0x460 [ 241.357322] ? lock_downgrade+0x900/0x900 [ 241.361480] ? __schedule+0x1ed0/0x1ed0 [ 241.365472] ? kasan_check_read+0x11/0x20 [ 241.369605] kobject: 'loop3' (0000000055af2e7d): kobject_uevent_env [ 241.369633] ? do_raw_spin_unlock+0xa7/0x2f0 [ 241.377112] kobject: 'kvm' (0000000098157298): kobject_uevent_env [ 241.380435] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 241.380450] ? lock_acquire+0x1ed/0x520 [ 241.380475] futex_wait_queue_me+0x3f9/0x840 [ 241.393456] kobject: 'loop3' (0000000055af2e7d): fill_kobj_path: path = '/devices/virtual/block/loop3' [ 241.395351] ? refill_pi_state_cache.part.9+0x320/0x320 [ 241.395372] ? kasan_check_write+0x14/0x20 [ 241.395386] ? do_raw_spin_lock+0xc1/0x200 [ 241.395402] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 241.395421] ? get_futex_value_locked+0xcb/0xf0 [ 241.419377] kobject: 'kvm' (0000000098157298): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 241.423110] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 241.423126] ? futex_wait_setup+0x266/0x3e0 [ 241.423145] ? futex_wake+0x760/0x760 [ 241.454565] kobject: 'kvm' (0000000098157298): kobject_uevent_env [ 241.455481] ? futex_wake+0x613/0x760 [ 241.455499] futex_wait+0x45c/0xa50 [ 241.455519] ? futex_wait_setup+0x3e0/0x3e0 [ 241.472118] kobject: 'kvm' (0000000098157298): fill_kobj_path: path = '/devices/virtual/misc/kvm' [ 241.473541] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 241.473560] ? drop_futex_key_refs.isra.15+0x6d/0xe0 [ 241.473578] ? futex_wake+0x304/0x760 [ 241.496752] ? rcu_pm_notify+0xc0/0xc0 [ 241.500658] do_futex+0x31a/0x26d0 [ 241.504214] ? kvm_vcpu_ioctl+0x2a1/0x1150 [ 241.508466] ? exit_robust_list+0x280/0x280 [ 241.512798] ? find_held_lock+0x36/0x1c0 [ 241.512922] kobject: 'loop1' (000000004db1b312): kobject_uevent_env [ 241.516898] ? __fget+0x4aa/0x740 [ 241.516913] ? lock_downgrade+0x900/0x900 [ 241.516932] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 241.516952] ? kasan_check_read+0x11/0x20 [ 241.523421] kobject: 'loop1' (000000004db1b312): fill_kobj_path: path = '/devices/virtual/block/loop1' [ 241.526823] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 241.526847] ? rcu_bh_qs+0xc0/0xc0 [ 241.526867] ? __fget+0x4d1/0x740 [ 241.526883] ? ksys_dup3+0x680/0x680 [ 241.526906] ? kvm_vcpu_block+0x1030/0x1030 [ 241.570714] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 241.576265] ? do_vfs_ioctl+0x201/0x1720 [ 241.580351] ? ioctl_preallocate+0x300/0x300 [ 241.584774] ? __fget_light+0x2e9/0x430 [ 241.588759] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 241.594335] ? smack_file_ioctl+0x210/0x3c0 [ 241.598663] ? fget_raw+0x20/0x20 [ 241.602132] ? smack_file_lock+0x2e0/0x2e0 [ 241.606387] __x64_sys_futex+0x472/0x6a0 [ 241.610462] ? do_futex+0x26d0/0x26d0 [ 241.614270] ? trace_hardirqs_on+0xbd/0x310 [ 241.618602] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 241.624156] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 241.629542] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 241.635022] ? ksys_ioctl+0x81/0xd0 [ 241.638666] do_syscall_64+0x1b9/0x820 [ 241.642565] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 241.647945] ? syscall_return_slowpath+0x5e0/0x5e0 [ 241.652885] ? trace_hardirqs_on_caller+0x310/0x310 [ 241.657937] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 241.662967] ? recalc_sigpending_tsk+0x180/0x180 [ 241.667741] ? kasan_check_write+0x14/0x20 [ 241.671990] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 241.676860] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 241.682061] RIP: 0033:0x457679 [ 241.685294] 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 [ 241.704208] RSP: 002b:00007f1bd7bf8cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 241.711945] RAX: ffffffffffffffda RBX: 000000000072bfa8 RCX: 0000000000457679 [ 241.719259] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000072bfa8 [ 241.726545] RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 [ 241.733854] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000072bfac [ 241.741155] R13: 00007ffdd3b93a3f R14: 00007f1bd7bf99c0 R15: 0000000000000001 [ 241.749357] Kernel Offset: disabled [ 241.752980] Rebooting in 86400 seconds..