[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.33' (ECDSA) to the list of known hosts. 2021/09/10 23:51:55 parsed 1 programs 2021/09/10 23:51:55 executed programs: 0 syzkaller login: [ 1600.071218][ T6556] chnl_net:caif_netlink_parms(): no params data found [ 1600.136193][ T6556] bridge0: port 1(bridge_slave_0) entered blocking state [ 1600.146463][ T6556] bridge0: port 1(bridge_slave_0) entered disabled state [ 1600.156039][ T6556] device bridge_slave_0 entered promiscuous mode [ 1600.165068][ T6556] bridge0: port 2(bridge_slave_1) entered blocking state [ 1600.172292][ T6556] bridge0: port 2(bridge_slave_1) entered disabled state [ 1600.180884][ T6556] device bridge_slave_1 entered promiscuous mode [ 1600.204938][ T6556] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1600.216226][ T6556] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1600.242961][ T6556] team0: Port device team_slave_0 added [ 1600.250105][ T6556] team0: Port device team_slave_1 added [ 1600.273351][ T6556] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1600.280535][ T6556] 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. [ 1600.306651][ T6556] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1600.320512][ T6556] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1600.327508][ T6556] 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. [ 1600.353698][ T6556] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1600.385059][ T6556] device hsr_slave_0 entered promiscuous mode [ 1600.391847][ T6556] device hsr_slave_1 entered promiscuous mode [ 1600.487118][ T6556] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1600.499181][ T6556] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1600.508908][ T6556] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1600.518443][ T6556] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1600.537019][ T6556] bridge0: port 2(bridge_slave_1) entered blocking state [ 1600.544625][ T6556] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1600.552153][ T6556] bridge0: port 1(bridge_slave_0) entered blocking state [ 1600.559243][ T6556] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1600.598084][ T6556] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1600.610653][ T6879] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1600.621681][ T6879] bridge0: port 1(bridge_slave_0) entered disabled state [ 1600.630555][ T6879] bridge0: port 2(bridge_slave_1) entered disabled state [ 1600.638900][ T6879] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1600.650670][ T6556] 8021q: adding VLAN 0 to HW filter on device team0 [ 1600.660292][ T6890] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1600.668732][ T6890] bridge0: port 1(bridge_slave_0) entered blocking state [ 1600.675849][ T6890] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1600.695024][ T6890] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1600.703274][ T6890] bridge0: port 2(bridge_slave_1) entered blocking state [ 1600.713385][ T6890] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1600.721409][ T6890] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1600.733306][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1600.741689][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1600.754479][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1600.766763][ T6879] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1600.776695][ T6556] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1600.795474][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1600.803245][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1600.813805][ T6556] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1600.830590][ T6529] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1600.850002][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1600.859422][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1600.867665][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1600.877413][ T6556] device veth0_vlan entered promiscuous mode [ 1600.888990][ T6556] device veth1_vlan entered promiscuous mode [ 1600.907791][ T6529] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1600.916725][ T6529] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1600.925619][ T6529] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1600.936030][ T6556] device veth0_macvtap entered promiscuous mode [ 1600.945669][ T6556] device veth1_macvtap entered promiscuous mode [ 1600.960165][ T6556] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1600.968074][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1600.977811][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1600.989068][ T6556] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1600.998755][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1601.012884][ T6556] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 1601.022878][ T6556] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 1601.033472][ T6556] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 1601.043559][ T6556] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 1601.104050][ T6687] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1601.131841][ T6687] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1601.140636][ T1177] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1601.153884][ T1177] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1601.166336][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1601.180534][ T6889] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 1601.965549][ T6889] Bluetooth: hci0: command 0x0409 tx timeout 2021/09/10 23:52:00 executed programs: 94 [ 1604.044409][ T6681] Bluetooth: hci0: command 0x041b tx timeout [ 1606.134781][ T1051] Bluetooth: hci0: command 0x040f tx timeout [ 1606.695344][ T1357] ieee802154 phy0 wpan0: encryption failed: -22 [ 1606.701836][ T1357] ieee802154 phy1 wpan1: encryption failed: -22 [ 1608.214441][ T6681] Bluetooth: hci0: command 0x0419 tx timeout 2021/09/10 23:52:05 executed programs: 297 [ 1610.024053][ T6910] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 1610.366491][ T6910] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 1610.705769][ T6910] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 1611.063830][ T6910] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 1612.882611][ T7709] chnl_net:caif_netlink_parms(): no params data found [ 1612.935292][ T7709] bridge0: port 1(bridge_slave_0) entered blocking state [ 1612.943349][ T7709] bridge0: port 1(bridge_slave_0) entered disabled state [ 1612.952587][ T7709] device bridge_slave_0 entered promiscuous mode [ 1613.201946][ T7709] bridge0: port 2(bridge_slave_1) entered blocking state [ 1613.209999][ T7709] bridge0: port 2(bridge_slave_1) entered disabled state [ 1613.218827][ T7709] device bridge_slave_1 entered promiscuous mode [ 1613.485433][ T7709] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1613.496743][ T7709] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1613.526702][ T7709] team0: Port device team_slave_0 added [ 1613.776573][ T7709] team0: Port device team_slave_1 added [ 1613.801380][ T7709] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1613.808791][ T7709] 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. [ 1613.835439][ T7709] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1613.847405][ T7709] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1613.855463][ T7709] 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. [ 1613.881780][ T7709] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1614.159237][ T7709] device hsr_slave_0 entered promiscuous mode [ 1614.166485][ T7709] device hsr_slave_1 entered promiscuous mode [ 1614.173413][ T7709] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 1614.181260][ T7709] Cannot create hsr debugfs directory [ 1614.204511][ T6879] Bluetooth: hci0: command 0x0409 tx timeout [ 1615.053129][ T7709] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1615.067381][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 1615.075190][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1615.085927][ T7709] 8021q: adding VLAN 0 to HW filter on device team0 [ 1615.109062][ T6910] device hsr_slave_0 left promiscuous mode [ 1615.116244][ T6910] device hsr_slave_1 left promiscuous mode [ 1615.122925][ T6910] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 1615.131805][ T6910] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 1615.141061][ T6910] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 1615.148756][ T6910] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 1615.157142][ T6910] device bridge_slave_1 left promiscuous mode [ 1615.163639][ T6910] bridge0: port 2(bridge_slave_1) entered disabled state [ 1615.175069][ T6910] device bridge_slave_0 left promiscuous mode [ 1615.181203][ T6910] bridge0: port 1(bridge_slave_0) entered disabled state [ 1615.195565][ T6910] device veth1_macvtap left promiscuous mode [ 1615.201706][ T6910] device veth0_macvtap left promiscuous mode [ 1615.208240][ T6910] device veth1_vlan left promiscuous mode [ 1615.214056][ T6910] device veth0_vlan left promiscuous mode [ 1616.285369][ T7726] Bluetooth: hci0: command 0x041b tx timeout [ 1618.364271][ T7726] Bluetooth: hci0: command 0x040f tx timeout [ 1620.444258][ T7726] Bluetooth: hci0: command 0x0419 tx timeout [ 1627.194969][ T6910] team0 (unregistering): Port device team_slave_1 removed [ 1627.211243][ T6910] team0 (unregistering): Port device team_slave_0 removed [ 1627.223295][ T6910] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 1627.236960][ T6910] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 1627.283342][ T6910] bond0 (unregistering): Released all slaves [ 1627.331225][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 1627.341367][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1627.351010][ T1051] bridge0: port 1(bridge_slave_0) entered blocking state [ 1627.358366][ T1051] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1627.368118][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 1627.381220][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 1627.391041][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1627.400897][ T1051] bridge0: port 2(bridge_slave_1) entered blocking state [ 1627.408027][ T1051] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1627.416253][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 1627.434338][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 1627.442815][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 1627.453858][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1627.462772][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 1627.472644][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1627.485965][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1627.493560][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 1627.503442][ T7] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1627.515040][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 1627.528239][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1627.538393][ T7709] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1627.555276][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1627.562602][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1627.575320][ T7709] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1627.675295][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 1627.686273][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1627.699491][ T7709] device veth0_vlan entered promiscuous mode [ 1627.707381][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 1627.716188][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1627.724452][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1627.732003][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1627.745197][ T7709] device veth1_vlan entered promiscuous mode [ 1627.769731][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1627.778531][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1627.787356][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 1627.796816][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1627.808329][ T7709] device veth0_macvtap entered promiscuous mode [ 1627.819634][ T7709] device veth1_macvtap entered promiscuous mode [ 1627.838064][ T7709] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1627.846395][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1627.855679][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 1627.863459][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 1627.873079][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1627.884898][ T7709] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1627.894708][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1627.903081][ T7726] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1627.993578][ T8054] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1628.014656][ T8054] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1628.043396][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1628.065772][ T6530] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1628.080738][ T6530] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1628.102247][ T1051] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 2021/09/10 23:52:24 executed programs: 322 2021/09/10 23:52:29 executed programs: 663 [ 1637.103953][ T8893] chnl_net:caif_netlink_parms(): no params data found [ 1637.642887][ T8893] bridge0: port 1(bridge_slave_0) entered blocking state [ 1637.651870][ T8893] bridge0: port 1(bridge_slave_0) entered disabled state [ 1637.660208][ T8893] device bridge_slave_0 entered promiscuous mode [ 1637.932411][ T8893] bridge0: port 2(bridge_slave_1) entered blocking state [ 1637.939599][ T8893] bridge0: port 2(bridge_slave_1) entered disabled state [ 1637.947485][ T8893] device bridge_slave_1 entered promiscuous mode [ 1637.971288][ T8893] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1637.993610][ T6687] device hsr_slave_0 left promiscuous mode [ 1638.002345][ T6687] device hsr_slave_1 left promiscuous mode [ 1638.009124][ T6687] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 1638.017054][ T6687] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 1638.026353][ T6687] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 1638.033735][ T6687] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 1638.043181][ T6687] device bridge_slave_1 left promiscuous mode [ 1638.050402][ T6687] bridge0: port 2(bridge_slave_1) entered disabled state [ 1638.059100][ T6687] device bridge_slave_0 left promiscuous mode [ 1638.066023][ T6687] bridge0: port 1(bridge_slave_0) entered disabled state [ 1638.077979][ T6687] device veth1_macvtap left promiscuous mode [ 1638.083970][ T6687] device veth0_macvtap left promiscuous mode [ 1638.090347][ T6687] device veth1_vlan left promiscuous mode [ 1638.096369][ T6687] device veth0_vlan left promiscuous mode [ 1638.694241][ T1051] Bluetooth: hci0: command 0x0409 tx timeout [ 1640.764253][ T7726] Bluetooth: hci0: command 0x041b tx timeout [ 1642.844232][ T7726] Bluetooth: hci0: command 0x040f tx timeout [ 1644.924238][ T7726] Bluetooth: hci0: command 0x0419 tx timeout [ 1650.014294][ T22] ================================================================== [ 1650.024240][ T22] BUG: KASAN: use-after-free in __d_alloc+0x19a/0x950 [ 1650.031399][ T22] Read of size 5 at addr ffff888012984420 by task kdevtmpfs/22 [ 1650.039242][ T22] [ 1650.041547][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 1650.049244][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1650.059299][ T22] Call Trace: [ 1650.062561][ T22] dump_stack_lvl+0xcd/0x134 [ 1650.067142][ T22] print_address_description.constprop.0.cold+0x6c/0x309 [ 1650.074152][ T22] ? __d_alloc+0x19a/0x950 [ 1650.078561][ T22] ? __d_alloc+0x19a/0x950 [ 1650.082957][ T22] kasan_report.cold+0x83/0xdf [ 1650.088136][ T22] ? __d_alloc+0x19a/0x950 [ 1650.092555][ T22] kasan_check_range+0x13d/0x180 [ 1650.097472][ T22] memcpy+0x20/0x60 [ 1650.101277][ T22] __d_alloc+0x19a/0x950 [ 1650.105505][ T22] d_alloc+0x4a/0x230 [ 1650.109468][ T22] __lookup_hash+0xc8/0x180 [ 1650.113952][ T22] kern_path_locked+0x17e/0x320 [ 1650.118783][ T22] ? filename_lookup+0x80/0x80 [ 1650.123534][ T22] handle_remove+0xa2/0x5fe [ 1650.128024][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 1650.133642][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 1650.139617][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 1650.145411][ T22] ? find_held_lock+0x2d/0x110 [ 1650.150158][ T22] ? devtmpfsd+0xaa/0x2a3 [ 1650.154467][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 1650.159489][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 1650.164498][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 1650.169422][ T22] devtmpfsd+0x1b9/0x2a3 [ 1650.173661][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 1650.179211][ T22] kthread+0x3e5/0x4d0 [ 1650.183263][ T22] ? set_kthread_struct+0x130/0x130 [ 1650.188444][ T22] ret_from_fork+0x1f/0x30 [ 1650.192851][ T22] [ 1650.195154][ T22] Allocated by task 22: [ 1650.199282][ T22] kasan_save_stack+0x1b/0x40 [ 1650.203953][ T22] __kasan_slab_alloc+0x83/0xb0 [ 1650.208796][ T22] kmem_cache_alloc+0x209/0x390 [ 1650.213627][ T22] getname_kernel+0x4e/0x370 [ 1650.218195][ T22] kern_path_locked+0x71/0x320 [ 1650.222942][ T22] handle_remove+0xa2/0x5fe [ 1650.227423][ T22] devtmpfsd+0x1b9/0x2a3 [ 1650.231644][ T22] kthread+0x3e5/0x4d0 [ 1650.235692][ T22] ret_from_fork+0x1f/0x30 [ 1650.240091][ T22] [ 1650.242390][ T22] Freed by task 22: [ 1650.246167][ T22] kasan_save_stack+0x1b/0x40 [ 1650.250824][ T22] kasan_set_track+0x1c/0x30 [ 1650.255394][ T22] kasan_set_free_info+0x20/0x30 [ 1650.260310][ T22] __kasan_slab_free+0xff/0x130 [ 1650.265136][ T22] slab_free_freelist_hook+0x81/0x190 [ 1650.270486][ T22] kmem_cache_free+0x8a/0x5b0 [ 1650.275140][ T22] putname.part.0+0xe1/0x120 [ 1650.279714][ T22] kern_path_locked+0xc2/0x320 [ 1650.284892][ T22] handle_remove+0xa2/0x5fe [ 1650.289393][ T22] devtmpfsd+0x1b9/0x2a3 [ 1650.293625][ T22] kthread+0x3e5/0x4d0 [ 1650.297673][ T22] ret_from_fork+0x1f/0x30 [ 1650.302072][ T22] [ 1650.304373][ T22] The buggy address belongs to the object at ffff888012984400 [ 1650.304373][ T22] which belongs to the cache names_cache of size 4096 [ 1650.318487][ T22] The buggy address is located 32 bytes inside of [ 1650.318487][ T22] 4096-byte region [ffff888012984400, ffff888012985400) [ 1650.331736][ T22] The buggy address belongs to the page: [ 1650.337339][ T22] page:ffffea00004a6000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12980 [ 1650.347551][ T22] head:ffffea00004a6000 order:3 compound_mapcount:0 compound_pincount:0 [ 1650.355869][ T22] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) [ 1650.363918][ T22] raw: 00fff00000010200 ffffea0000634e00 0000000200000002 ffff888010dc53c0 [ 1650.372479][ T22] raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 [ 1650.381050][ T22] page dumped because: kasan: bad access detected [ 1650.387436][ T22] page_owner tracks the page as allocated [ 1650.393123][ T22] page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6556, ts 1605316282507, free_ts 1605296169338 [ 1650.412543][ T22] get_page_from_freelist+0xa72/0x2f80 [ 1650.417983][ T22] __alloc_pages+0x1b2/0x500 [ 1650.422553][ T22] alloc_pages+0x1a7/0x300 [ 1650.426948][ T22] new_slab+0x319/0x490 [ 1650.431084][ T22] ___slab_alloc+0x921/0xfe0 [ 1650.435651][ T22] __slab_alloc.constprop.0+0x4d/0xa0 [ 1650.441001][ T22] kmem_cache_alloc+0x365/0x390 [ 1650.445829][ T22] getname_flags.part.0+0x50/0x4f0 [ 1650.450920][ T22] getname_flags+0x9a/0xe0 [ 1650.455315][ T22] user_path_at_empty+0x2b/0x90 [ 1650.460144][ T22] __x64_sys_umount+0xf8/0x180 [ 1650.464885][ T22] do_syscall_64+0x35/0xb0 [ 1650.469282][ T22] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 1650.475154][ T22] page last free stack trace: [ 1650.479800][ T22] free_pcp_prepare+0x2c5/0x780 [ 1650.484628][ T22] free_unref_page+0x19/0x690 [ 1650.489283][ T22] __unfreeze_partials+0x340/0x360 [ 1650.494376][ T22] qlist_free_all+0x5a/0xc0 [ 1650.498857][ T22] kasan_quarantine_reduce+0x180/0x200 [ 1650.504293][ T22] __kasan_slab_alloc+0x95/0xb0 [ 1650.509120][ T22] kmem_cache_alloc+0x209/0x390 [ 1650.513947][ T22] getname_flags.part.0+0x50/0x4f0 [ 1650.519035][ T22] getname_flags+0x9a/0xe0 [ 1650.523431][ T22] user_path_at_empty+0x2b/0x90 [ 1650.528259][ T22] __x64_sys_umount+0xf8/0x180 [ 1650.533002][ T22] do_syscall_64+0x35/0xb0 [ 1650.537396][ T22] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 1650.543372][ T22] [ 1650.545672][ T22] Memory state around the buggy address: [ 1650.551278][ T22] ffff888012984300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1650.559318][ T22] ffff888012984380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1650.567360][ T22] >ffff888012984400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1650.575395][ T22] ^ [ 1650.580480][ T22] ffff888012984480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1650.588514][ T22] ffff888012984500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1650.596563][ T22] ================================================================== [ 1650.604599][ T22] Disabling lock debugging due to kernel taint [ 1650.613623][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 1650.620207][ T22] CPU: 1 PID: 22 Comm: kdevtmpfs Tainted: G B 5.14.0-syzkaller #0 [ 1650.629392][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1650.639490][ T22] Call Trace: [ 1650.642746][ T22] dump_stack_lvl+0xcd/0x134 [ 1650.647334][ T22] panic+0x2b0/0x6dd [ 1650.651205][ T22] ? __warn_printk+0xf3/0xf3 [ 1650.655769][ T22] ? preempt_schedule_common+0x59/0xc0 [ 1650.661421][ T22] ? __d_alloc+0x19a/0x950 [ 1650.665816][ T22] ? preempt_schedule_thunk+0x16/0x18 [ 1650.671166][ T22] ? trace_hardirqs_on+0x38/0x1c0 [ 1650.676189][ T22] ? trace_hardirqs_on+0x51/0x1c0 [ 1650.681190][ T22] ? __d_alloc+0x19a/0x950 [ 1650.685579][ T22] ? __d_alloc+0x19a/0x950 [ 1650.689972][ T22] end_report.cold+0x63/0x6f [ 1650.694537][ T22] kasan_report.cold+0x71/0xdf [ 1650.699291][ T22] ? __d_alloc+0x19a/0x950 [ 1650.703681][ T22] kasan_check_range+0x13d/0x180 [ 1650.708599][ T22] memcpy+0x20/0x60 [ 1650.712382][ T22] __d_alloc+0x19a/0x950 [ 1650.716602][ T22] d_alloc+0x4a/0x230 [ 1650.720560][ T22] __lookup_hash+0xc8/0x180 [ 1650.725040][ T22] kern_path_locked+0x17e/0x320 [ 1650.729884][ T22] ? filename_lookup+0x80/0x80 [ 1650.734624][ T22] handle_remove+0xa2/0x5fe [ 1650.739194][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 1650.744804][ T22] ? lockdep_hardirqs_on_prepare+0x400/0x400 [ 1650.750762][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 1650.756561][ T22] ? find_held_lock+0x2d/0x110 [ 1650.761302][ T22] ? devtmpfsd+0xaa/0x2a3 [ 1650.765608][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 1650.770433][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 1650.775449][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 1650.780363][ T22] devtmpfsd+0x1b9/0x2a3 [ 1650.784667][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 1650.790193][ T22] kthread+0x3e5/0x4d0 [ 1650.794239][ T22] ? set_kthread_struct+0x130/0x130 [ 1650.799413][ T22] ret_from_fork+0x1f/0x30 [ 1650.804737][ T22] Kernel Offset: disabled [ 1650.809040][ T22] Rebooting in 86400 seconds..