[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 27.086322] kauditd_printk_skb: 7 callbacks suppressed [ 27.086334] audit: type=1800 audit(1538354799.911:29): pid=5237 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 27.120308] audit: type=1800 audit(1538354799.921:30): pid=5237 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.88' (ECDSA) to the list of known hosts. 2018/10/01 00:47:14 parsed 1 programs 2018/10/01 00:47:16 executed programs: 0 syzkaller login: [ 63.474172] IPVS: ftp: loaded support on port[0] = 21 [ 63.488690] IPVS: ftp: loaded support on port[0] = 21 [ 63.511680] IPVS: ftp: loaded support on port[0] = 21 [ 63.520636] IPVS: ftp: loaded support on port[0] = 21 [ 63.543669] IPVS: ftp: loaded support on port[0] = 21 [ 63.548910] IPVS: ftp: loaded support on port[0] = 21 [ 64.355611] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.366948] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.374467] device bridge_slave_0 entered promiscuous mode [ 64.387662] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.394675] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.405661] device bridge_slave_0 entered promiscuous mode [ 64.414227] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.423723] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.431344] device bridge_slave_0 entered promiscuous mode [ 64.445555] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.453371] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.460850] device bridge_slave_1 entered promiscuous mode [ 64.469347] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.475712] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.482938] device bridge_slave_1 entered promiscuous mode [ 64.498271] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.504923] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.512738] device bridge_slave_1 entered promiscuous mode [ 64.520940] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 64.537433] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 64.544803] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.551570] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.560249] device bridge_slave_0 entered promiscuous mode [ 64.570375] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.576879] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.584004] device bridge_slave_0 entered promiscuous mode [ 64.593591] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 64.603300] bridge0: port 1(bridge_slave_0) entered blocking state [ 64.610338] bridge0: port 1(bridge_slave_0) entered disabled state [ 64.620810] device bridge_slave_0 entered promiscuous mode [ 64.629403] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 64.636783] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.644289] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.652378] device bridge_slave_1 entered promiscuous mode [ 64.660566] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 64.671547] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 64.681974] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.689307] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.696374] device bridge_slave_1 entered promiscuous mode [ 64.704450] bridge0: port 2(bridge_slave_1) entered blocking state [ 64.711474] bridge0: port 2(bridge_slave_1) entered disabled state [ 64.720131] device bridge_slave_1 entered promiscuous mode [ 64.746216] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 64.758278] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 64.797720] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 64.807151] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bridge: link is not ready [ 64.817405] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 64.830283] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 64.848433] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bridge: link is not ready [ 64.856591] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 64.891272] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 64.922298] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 64.968591] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 64.996115] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 65.022797] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 65.040485] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 65.067197] bond0: Enslaving bond_slave_0 as an active interface with an up link [ 65.101364] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 65.132986] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 65.145409] bond0: Enslaving bond_slave_1 as an active interface with an up link [ 65.171111] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 65.185930] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 65.208736] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 65.215676] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 65.226550] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 65.243432] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 65.257798] team0: Port device team_slave_0 added [ 65.263019] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 65.273007] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 65.286734] IPv6: ADDRCONF(NETDEV_UP): veth0_to_bond: link is not ready [ 65.294616] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 65.302861] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 65.319639] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 65.329769] team0: Port device team_slave_1 added [ 65.337828] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 65.355390] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 65.379745] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 65.388947] IPv6: ADDRCONF(NETDEV_UP): veth0_to_team: link is not ready [ 65.397448] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 65.405288] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 65.426611] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.444865] IPv6: ADDRCONF(NETDEV_UP): veth1_to_bond: link is not ready [ 65.488418] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 65.496502] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 65.541345] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 65.548963] team0: Port device team_slave_0 added [ 65.554497] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 65.566681] team0: Port device team_slave_0 added [ 65.588911] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 65.618951] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 65.627777] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 65.654192] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 65.667493] team0: Port device team_slave_0 added [ 65.676637] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 65.691196] team0: Port device team_slave_1 added [ 65.696550] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 65.711682] team0: Port device team_slave_1 added [ 65.720069] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 65.730615] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 65.738238] team0: Port device team_slave_0 added [ 65.748107] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 65.756143] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 65.766559] IPv6: ADDRCONF(NETDEV_UP): team_slave_0: link is not ready [ 65.774250] team0: Port device team_slave_0 added [ 65.796068] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.807828] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.838583] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 65.845934] team0: Port device team_slave_1 added [ 65.855424] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 65.863124] team0: Port device team_slave_1 added [ 65.885880] IPv6: ADDRCONF(NETDEV_UP): team_slave_1: link is not ready [ 65.902888] team0: Port device team_slave_1 added [ 65.918572] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 65.929271] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 65.953177] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.963475] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 65.987977] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 65.997174] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 66.014193] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 66.022975] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 66.045901] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 66.055205] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 66.069224] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 66.078476] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 66.093740] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 66.114104] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 66.123297] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 66.134528] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 66.145729] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 66.155068] IPv6: ADDRCONF(NETDEV_UP): veth1_to_team: link is not ready [ 66.165807] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 66.175956] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 66.193300] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 66.218172] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 66.230241] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 66.238104] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 66.245536] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 66.253932] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 66.261693] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 66.269692] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 66.287814] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_0: link is not ready [ 66.297832] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 66.306406] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 66.319089] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 66.328007] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 66.336121] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 66.347639] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 66.367184] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 66.378097] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 66.399084] IPv6: ADDRCONF(NETDEV_UP): bridge_slave_1: link is not ready [ 66.407436] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 66.423133] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 66.770790] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.777525] bridge0: port 2(bridge_slave_1) entered forwarding state [ 66.784903] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.791343] bridge0: port 1(bridge_slave_0) entered forwarding state [ 66.814840] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 67.036146] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.042946] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.049692] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.056101] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.065500] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 67.080173] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.086549] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.093325] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.099762] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.112130] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 67.128771] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 67.136412] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 67.162305] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 67.194286] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.200743] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.207478] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.213864] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.243687] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 67.315289] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.321751] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.328465] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.334838] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.346667] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 67.365840] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.372291] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.379085] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.385476] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.407673] IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready [ 68.155694] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 68.170106] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 68.183753] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 69.738384] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.011112] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 70.032987] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.064840] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.079479] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.223609] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.273340] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 70.327985] 8021q: adding VLAN 0 to HW filter on device bond0 [ 70.338662] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 70.351629] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 70.363012] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 70.378893] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.398488] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 70.529758] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 70.567814] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 70.573980] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 70.582989] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.605415] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 70.617532] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 70.625129] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.641230] IPv6: ADDRCONF(NETDEV_UP): veth0: link is not ready [ 70.650354] 8021q: adding VLAN 0 to HW filter on device team0 [ 70.737308] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 70.743876] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 70.752517] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.780590] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 70.796753] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 70.809609] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.868689] 8021q: adding VLAN 0 to HW filter on device team0 [ 70.890634] IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready [ 70.896974] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 70.913292] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 70.963788] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.072126] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.102561] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.196798] 8021q: adding VLAN 0 to HW filter on device team0 2018/10/01 00:47:26 executed programs: 6 2018/10/01 00:47:31 executed programs: 36 2018/10/01 00:47:36 executed programs: 66 2018/10/01 00:47:41 executed programs: 96 2018/10/01 00:47:46 executed programs: 126 2018/10/01 00:47:52 executed programs: 156 [ 101.504696] ================================================================== [ 101.512238] BUG: KASAN: use-after-free in fuse_dev_do_read.isra.27+0x1659/0x1920 [ 101.519759] Read of size 8 at addr ffff8801d32e8a30 by task syz-executor2/8682 [ 101.527096] [ 101.528723] CPU: 0 PID: 8682 Comm: syz-executor2 Not tainted 4.19.0-rc6+ #262 [ 101.535974] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 101.545310] Call Trace: [ 101.547916] dump_stack+0x1c4/0x2b4 [ 101.551535] ? dump_stack_print_info.cold.2+0x52/0x52 [ 101.556709] ? printk+0xa7/0xcf [ 101.559973] ? kmsg_dump_rewind_nolock+0xe4/0xe4 [ 101.564728] print_address_description.cold.8+0x9/0x1ff [ 101.570101] kasan_report.cold.9+0x242/0x309 [ 101.574496] ? fuse_dev_do_read.isra.27+0x1659/0x1920 [ 101.579694] __asan_report_load8_noabort+0x14/0x20 [ 101.584622] fuse_dev_do_read.isra.27+0x1659/0x1920 [ 101.589630] ? fuse_dev_release+0x780/0x780 [ 101.593939] ? print_usage_bug+0xc0/0xc0 [ 101.597989] ? print_usage_bug+0xc0/0xc0 [ 101.602041] ? futex_wait_setup+0x3e0/0x3e0 [ 101.606364] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 101.611554] ? drop_futex_key_refs.isra.15+0x6d/0xe0 [ 101.616659] ? graph_lock+0x170/0x170 [ 101.620444] ? futex_wake+0x304/0x760 [ 101.624230] ? mark_held_locks+0x130/0x130 [ 101.628474] ? find_held_lock+0x36/0x1c0 [ 101.632545] ? aa_file_perm+0x469/0x1060 [ 101.636593] ? lock_downgrade+0x900/0x900 [ 101.640739] ? check_preemption_disabled+0x48/0x200 [ 101.645759] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 101.651544] ? kasan_check_read+0x11/0x20 [ 101.655688] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 101.660964] ? rcu_bh_qs+0xc0/0xc0 [ 101.664497] ? aa_file_perm+0x490/0x1060 [ 101.668560] ? memset+0x31/0x40 [ 101.671846] fuse_dev_read+0x1a9/0x250 [ 101.675719] ? fuse_dev_splice_read+0x840/0x840 [ 101.680372] ? __save_stack_trace+0x8d/0xf0 [ 101.684686] ? find_held_lock+0x36/0x1c0 [ 101.688746] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 101.694288] ? iov_iter_init+0xc2/0x1e0 [ 101.698252] __vfs_read+0x6ac/0x9b0 [ 101.701866] ? vfs_copy_file_range+0xb90/0xb90 [ 101.706436] ? fsnotify+0x12f0/0x12f0 [ 101.710233] ? rw_verify_area+0x118/0x360 [ 101.714374] vfs_read+0x17f/0x3c0 [ 101.717816] ksys_read+0x101/0x260 [ 101.721346] ? kernel_write+0x120/0x120 [ 101.725328] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 101.730780] __x64_sys_read+0x73/0xb0 [ 101.734600] do_syscall_64+0x1b9/0x820 [ 101.738486] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 101.743834] ? syscall_return_slowpath+0x5e0/0x5e0 [ 101.748751] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 101.753604] ? trace_hardirqs_on_caller+0x310/0x310 [ 101.758645] ? prepare_exit_to_usermode+0x291/0x3b0 [ 101.763696] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 101.768540] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.773723] RIP: 0033:0x457579 [ 101.776916] 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 [ 101.795800] RSP: 002b:00007f9e2ebf7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 101.803515] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579 [ 101.810767] RDX: 0000000000001000 RSI: 00000000200030c0 RDI: 0000000000000006 [ 101.818021] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 101.825287] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9e2ebf86d4 [ 101.832540] R13: 00000000004c31b7 R14: 00000000004d4c98 R15: 00000000ffffffff [ 101.839808] [ 101.841421] Allocated by task 8682: [ 101.845035] save_stack+0x43/0xd0 [ 101.848485] kasan_kmalloc+0xc7/0xe0 [ 101.852188] kasan_slab_alloc+0x12/0x20 [ 101.856176] kmem_cache_alloc+0x12e/0x730 [ 101.860306] __fuse_request_alloc+0x27/0xf0 [ 101.864617] fuse_request_alloc+0x18/0x20 [ 101.868765] fuse_fill_super+0x12bf/0x1ea0 [ 101.872985] mount_nodev+0x6b/0x110 [ 101.876595] fuse_mount+0x2c/0x40 [ 101.880031] mount_fs+0xae/0x31d [ 101.883405] vfs_kern_mount.part.35+0xdc/0x4f0 [ 101.887979] do_mount+0x581/0x31f0 [ 101.891502] ksys_mount+0x12d/0x140 [ 101.895129] __x64_sys_mount+0xbe/0x150 [ 101.899091] do_syscall_64+0x1b9/0x820 [ 101.902960] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.908130] [ 101.909775] Freed by task 8723: [ 101.913036] save_stack+0x43/0xd0 [ 101.916484] __kasan_slab_free+0x102/0x150 [ 101.920711] kasan_slab_free+0xe/0x10 [ 101.924501] kmem_cache_free+0x83/0x290 [ 101.928460] fuse_request_free+0x8b/0xa0 [ 101.932507] fuse_put_request+0x2a6/0x350 [ 101.936637] request_end+0xba/0xaa0 [ 101.940248] fuse_dev_do_write+0x192e/0x36e0 [ 101.944641] fuse_dev_write+0x19a/0x240 [ 101.948615] __vfs_write+0x6b8/0x9f0 [ 101.952339] vfs_write+0x1fc/0x560 [ 101.955862] ksys_write+0x101/0x260 [ 101.959476] __x64_sys_write+0x73/0xb0 [ 101.963348] do_syscall_64+0x1b9/0x820 [ 101.967220] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 101.972388] [ 101.974001] The buggy address belongs to the object at ffff8801d32e8a00 [ 101.974001] which belongs to the cache fuse_request of size 448 [ 101.986741] The buggy address is located 48 bytes inside of [ 101.986741] 448-byte region [ffff8801d32e8a00, ffff8801d32e8bc0) [ 101.998522] The buggy address belongs to the page: [ 102.003437] page:ffffea00074cba00 count:1 mapcount:0 mapping:ffff8801d4a7d840 index:0x0 [ 102.011567] flags: 0x2fffc0000000100(slab) [ 102.015803] raw: 02fffc0000000100 ffffea0006e5c948 ffffea0006e5ca08 ffff8801d4a7d840 [ 102.023691] raw: 0000000000000000 ffff8801d32e8000 0000000100000008 0000000000000000 [ 102.031595] page dumped because: kasan: bad access detected [ 102.037312] [ 102.038936] Memory state around the buggy address: [ 102.043848] ffff8801d32e8900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 102.051189] ffff8801d32e8980: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 102.058531] >ffff8801d32e8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 102.065876] ^ [ 102.070789] ffff8801d32e8a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 102.078137] ffff8801d32e8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 102.085538] ================================================================== [ 102.092888] Disabling lock debugging due to kernel taint [ 102.100293] Kernel panic - not syncing: panic_on_warn set ... [ 102.100293] [ 102.107696] CPU: 1 PID: 8682 Comm: syz-executor2 Tainted: G B 4.19.0-rc6+ #262 [ 102.109110] kobject: '0:47' (00000000a59f9bb9): kobject_uevent_env [ 102.116821] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 102.116827] Call Trace: [ 102.116848] dump_stack+0x1c4/0x2b4 [ 102.116866] ? dump_stack_print_info.cold.2+0x52/0x52 [ 102.116885] panic+0x238/0x4e7 [ 102.116897] ? add_taint.cold.5+0x16/0x16 [ 102.116912] ? preempt_schedule+0x4d/0x60 [ 102.116927] ? ___preempt_schedule+0x16/0x18 [ 102.116942] ? trace_hardirqs_on+0xb4/0x310 [ 102.116960] kasan_end_report+0x47/0x4f [ 102.123789] kobject: '0:47' (00000000a59f9bb9): fill_kobj_path: path = '/devices/virtual/bdi/0:47' [ 102.132614] kasan_report.cold.9+0x76/0x309 [ 102.132629] ? fuse_dev_do_read.isra.27+0x1659/0x1920 [ 102.132645] __asan_report_load8_noabort+0x14/0x20 [ 102.132663] fuse_dev_do_read.isra.27+0x1659/0x1920 [ 102.136011] kobject: '0:47' (00000000a59f9bb9): kobject_cleanup, parent (null) [ 102.138891] ? fuse_dev_release+0x780/0x780 [ 102.138908] ? print_usage_bug+0xc0/0xc0 [ 102.138928] ? print_usage_bug+0xc0/0xc0 [ 102.144535] kobject: '0:47' (00000000a59f9bb9): calling ktype release [ 102.147298] ? futex_wait_setup+0x3e0/0x3e0 [ 102.147315] ? __sanitizer_cov_trace_switch+0x53/0x90 [ 102.147332] ? drop_futex_key_refs.isra.15+0x6d/0xe0 [ 102.147349] ? graph_lock+0x170/0x170 [ 102.152081] kobject: '0:47': free name [ 102.155622] ? futex_wake+0x304/0x760 [ 102.155636] ? mark_held_locks+0x130/0x130 [ 102.155657] ? find_held_lock+0x36/0x1c0 [ 102.170175] kobject: '0:47' (000000001c363d34): kobject_add_internal: parent: 'bdi', set: 'devices' [ 102.177417] ? aa_file_perm+0x469/0x1060 [ 102.177432] ? lock_downgrade+0x900/0x900 [ 102.177448] ? check_preemption_disabled+0x48/0x200 [ 102.177468] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 102.182076] kobject: '0:47' (000000001c363d34): kobject_uevent_env [ 102.186971] ? kasan_check_read+0x11/0x20 [ 102.186988] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 102.187001] ? rcu_bh_qs+0xc0/0xc0 [ 102.187022] ? aa_file_perm+0x490/0x1060 [ 102.192397] kobject: '0:47' (000000001c363d34): fill_kobj_path: path = '/devices/virtual/bdi/0:47' [ 102.196945] ? memset+0x31/0x40 [ 102.196964] fuse_dev_read+0x1a9/0x250 [ 102.196979] ? fuse_dev_splice_read+0x840/0x840 [ 102.197000] ? __save_stack_trace+0x8d/0xf0 [ 102.208655] kobject: 'loop1' (000000000057c26c): kobject_uevent_env [ 102.209538] ? find_held_lock+0x36/0x1c0 [ 102.209554] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 102.209583] ? iov_iter_init+0xc2/0x1e0 [ 102.213699] kobject: 'loop1' (000000000057c26c): fill_kobj_path: path = '/devices/virtual/block/loop1' [ 102.217676] __vfs_read+0x6ac/0x9b0 [ 102.217695] ? vfs_copy_file_range+0xb90/0xb90 [ 102.217709] ? fsnotify+0x12f0/0x12f0 [ 102.217733] ? rw_verify_area+0x118/0x360 [ 102.354944] kobject: '0:51' (000000002d504cd5): kobject_add_internal: parent: 'bdi', set: 'devices' [ 102.364282] vfs_read+0x17f/0x3c0 [ 102.364300] ksys_read+0x101/0x260 [ 102.364318] ? kernel_write+0x120/0x120 [ 102.368212] kobject: '0:51' (000000002d504cd5): kobject_uevent_env [ 102.372526] ? __bpf_trace_preemptirq_template+0x30/0x30 [ 102.376322] kobject: '0:51' (000000002d504cd5): fill_kobj_path: path = '/devices/virtual/bdi/0:51' [ 102.380440] __x64_sys_read+0x73/0xb0 [ 102.380457] do_syscall_64+0x1b9/0x820 [ 102.380477] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 102.434372] ? syscall_return_slowpath+0x5e0/0x5e0 [ 102.439288] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 102.444116] ? trace_hardirqs_on_caller+0x310/0x310 [ 102.449122] ? prepare_exit_to_usermode+0x291/0x3b0 [ 102.454145] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 102.458984] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 102.464168] RIP: 0033:0x457579 [ 102.467343] 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 [ 102.486226] RSP: 002b:00007f9e2ebf7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 102.493915] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579 [ 102.501165] RDX: 0000000000001000 RSI: 00000000200030c0 RDI: 0000000000000006 [ 102.508423] RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 [ 102.515687] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9e2ebf86d4 [ 102.522938] R13: 00000000004c31b7 R14: 00000000004d4c98 R15: 00000000ffffffff [ 102.531183] Kernel Offset: disabled [ 102.534804] Rebooting in 86400 seconds..