[ 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 '10.128.0.60' (ECDSA) to the list of known hosts. 2021/09/06 00:46:01 parsed 1 programs 2021/09/06 00:46:01 executed programs: 0 syzkaller login: [ 1093.234144][ T8450] chnl_net:caif_netlink_parms(): no params data found [ 1093.286781][ T8450] bridge0: port 1(bridge_slave_0) entered blocking state [ 1093.294358][ T8450] bridge0: port 1(bridge_slave_0) entered disabled state [ 1093.302405][ T8450] device bridge_slave_0 entered promiscuous mode [ 1093.310505][ T8450] bridge0: port 2(bridge_slave_1) entered blocking state [ 1093.317569][ T8450] bridge0: port 2(bridge_slave_1) entered disabled state [ 1093.326017][ T8450] device bridge_slave_1 entered promiscuous mode [ 1093.346221][ T8450] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1093.356871][ T8450] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1093.381525][ T8450] team0: Port device team_slave_0 added [ 1093.388132][ T8450] team0: Port device team_slave_1 added [ 1093.406846][ T8450] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1093.414128][ T8450] 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. [ 1093.440006][ T8450] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1093.451684][ T8450] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1093.458610][ T8450] 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. [ 1093.484528][ T8450] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1093.512220][ T8450] device hsr_slave_0 entered promiscuous mode [ 1093.518777][ T8450] device hsr_slave_1 entered promiscuous mode [ 1093.594128][ T8450] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 1093.602503][ T8450] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 1093.612008][ T8450] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 1093.621743][ T8450] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 1093.638625][ T8450] bridge0: port 2(bridge_slave_1) entered blocking state [ 1093.645677][ T8450] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1093.653043][ T8450] bridge0: port 1(bridge_slave_0) entered blocking state [ 1093.660162][ T8450] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1093.691073][ T8450] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1093.702483][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1093.710720][ T8577] bridge0: port 1(bridge_slave_0) entered disabled state [ 1093.718226][ T8577] bridge0: port 2(bridge_slave_1) entered disabled state [ 1093.726597][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1093.736614][ T8450] 8021q: adding VLAN 0 to HW filter on device team0 [ 1093.746351][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1093.754818][ T8577] bridge0: port 1(bridge_slave_0) entered blocking state [ 1093.761886][ T8577] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1093.771587][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1093.779933][ T3158] bridge0: port 2(bridge_slave_1) entered blocking state [ 1093.786957][ T3158] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1093.808250][ T8450] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 1093.818997][ T8450] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1093.831892][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1093.840776][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1093.848884][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1093.857349][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1093.865733][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1093.873426][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1093.888047][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1093.895644][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1093.906899][ T8450] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1093.929627][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1093.938676][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1093.947461][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1093.955358][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1093.965235][ T8450] device veth0_vlan entered promiscuous mode [ 1093.975041][ T8450] device veth1_vlan entered promiscuous mode [ 1093.991471][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1093.999453][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1094.007288][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1094.017467][ T8450] device veth0_macvtap entered promiscuous mode [ 1094.026305][ T8450] device veth1_macvtap entered promiscuous mode [ 1094.041094][ T8450] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1094.048504][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1094.058170][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1094.068280][ T8450] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1094.076112][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1094.086039][ T8450] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 1094.094972][ T8450] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 1094.104003][ T8450] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 1094.113068][ T8450] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 1094.160623][ T117] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1094.170329][ T117] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1094.181956][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1094.202386][ T117] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1094.210759][ T117] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1094.222182][ T26] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 1094.391167][ T117] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 1097.197071][ T117] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 1099.639918][ T8819] chnl_net:caif_netlink_parms(): no params data found [ 1099.709979][ T117] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 1099.721714][ T8819] bridge0: port 1(bridge_slave_0) entered blocking state [ 1099.728805][ T8819] bridge0: port 1(bridge_slave_0) entered disabled state [ 1099.736242][ T8819] device bridge_slave_0 entered promiscuous mode [ 1099.744252][ T8819] bridge0: port 2(bridge_slave_1) entered blocking state [ 1099.751423][ T8819] bridge0: port 2(bridge_slave_1) entered disabled state [ 1099.759581][ T8819] device bridge_slave_1 entered promiscuous mode [ 1099.780035][ T8819] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 1099.812373][ T117] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 1099.824461][ T8819] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 1099.850876][ T8819] team0: Port device team_slave_0 added [ 1099.857869][ T8819] team0: Port device team_slave_1 added [ 1099.894716][ T8819] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 1099.901918][ T8819] 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. [ 1099.951997][ T8819] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 1099.986813][ T8819] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 1099.995988][ T8819] 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. [ 1100.023291][ T8819] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 1100.281618][ T8819] device hsr_slave_0 entered promiscuous mode [ 1100.294337][ T8819] device hsr_slave_1 entered promiscuous mode [ 1100.304184][ T8819] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 1100.312023][ T8819] Cannot create hsr debugfs directory [ 1100.416774][ T8819] bridge0: port 2(bridge_slave_1) entered blocking state [ 1100.423828][ T8819] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1100.431128][ T8819] bridge0: port 1(bridge_slave_0) entered blocking state [ 1100.438164][ T8819] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1100.493680][ T8819] 8021q: adding VLAN 0 to HW filter on device bond0 [ 1100.504747][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 1100.512853][ T2947] bridge0: port 1(bridge_slave_0) entered disabled state [ 1100.521805][ T2947] bridge0: port 2(bridge_slave_1) entered disabled state [ 1100.529860][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 1100.541801][ T8819] 8021q: adding VLAN 0 to HW filter on device team0 [ 1100.551702][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 1100.559876][ T2947] bridge0: port 1(bridge_slave_0) entered blocking state [ 1100.566882][ T2947] bridge0: port 1(bridge_slave_0) entered forwarding state [ 1100.577675][ T8577] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 1100.586051][ T8577] bridge0: port 2(bridge_slave_1) entered blocking state [ 1100.593118][ T8577] bridge0: port 2(bridge_slave_1) entered forwarding state [ 1100.635685][ T8819] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 1100.646129][ T8819] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 1100.657600][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 1100.666700][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 1100.675319][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 1100.683759][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 1100.692226][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 1100.700721][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 1100.709113][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 1100.717137][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 1100.725500][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 1100.734064][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 1100.742054][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 1100.780679][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 1100.788016][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 1100.799223][ T8819] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 1100.882760][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 1100.891793][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 1100.930344][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 1100.938303][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 1100.947443][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 1100.955281][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 1100.964062][ T8819] device veth0_vlan entered promiscuous mode [ 1100.997320][ T8819] device veth1_vlan entered promiscuous mode [ 1101.015432][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 1101.023205][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 1101.031654][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 1101.040185][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 1101.074830][ T8819] device veth0_macvtap entered promiscuous mode [ 1101.083978][ T8819] device veth1_macvtap entered promiscuous mode [ 1101.097505][ T8819] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3d) already exists on: batadv_slave_0 [ 1101.108766][ T8819] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 1101.119870][ T8819] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 1101.132210][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 1101.141316][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 1101.150023][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 1101.158281][ T8425] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 1101.189761][ T8819] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_1 [ 1101.200519][ T8819] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 1101.211485][ T8819] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 1101.220022][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 1101.228317][ T3158] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 1101.250410][ T117] device hsr_slave_0 left promiscuous mode [ 1101.256786][ T117] device hsr_slave_1 left promiscuous mode [ 1101.263417][ T117] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 1101.271179][ T117] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 1101.279196][ T117] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 1101.286574][ T117] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 1101.294734][ T117] device bridge_slave_1 left promiscuous mode [ 1101.301254][ T117] bridge0: port 2(bridge_slave_1) entered disabled state [ 1101.309908][ T117] device bridge_slave_0 left promiscuous mode [ 1101.316030][ T117] bridge0: port 1(bridge_slave_0) entered disabled state [ 1101.325369][ T117] device veth1_macvtap left promiscuous mode [ 1101.331480][ T117] device veth0_macvtap left promiscuous mode [ 1101.337489][ T117] device veth1_vlan left promiscuous mode [ 1101.343313][ T117] device veth0_vlan left promiscuous mode [ 1101.558727][ T8783] Bluetooth: hci0: command 0x0409 tx timeout [ 1102.211539][ T117] team0 (unregistering): Port device team_slave_1 removed [ 1102.221068][ T117] team0 (unregistering): Port device team_slave_0 removed [ 1102.232294][ T117] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 1102.244484][ T117] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 1102.274334][ T117] bond0 (unregistering): Released all slaves [ 1102.362457][ T191] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1102.371567][ T191] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1102.395862][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 1102.405068][ T191] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 1102.414318][ T191] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 1102.422423][ T2947] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 1103.653235][ T117] device hsr_slave_0 left promiscuous mode [ 1103.660176][ T117] device hsr_slave_1 left promiscuous mode [ 1103.666265][ T117] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 1103.674038][ T117] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 1103.681930][ T117] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 1103.689379][ T117] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 1103.697369][ T117] device bridge_slave_1 left promiscuous mode [ 1103.704130][ T117] bridge0: port 2(bridge_slave_1) entered disabled state [ 1103.712091][ T117] device bridge_slave_0 left promiscuous mode [ 1103.718212][ T117] bridge0: port 1(bridge_slave_0) entered disabled state [ 1103.727286][ T117] device veth1_macvtap left promiscuous mode [ 1103.733342][ T117] device veth0_macvtap left promiscuous mode [ 1103.739659][ T117] device veth1_vlan left promiscuous mode [ 1103.745402][ T117] device veth0_vlan left promiscuous mode [ 1104.575872][ T22] ================================================================== [ 1104.583932][ T22] BUG: KASAN: use-after-free in __d_alloc+0x19a/0x950 [ 1104.590758][ T22] Read of size 5 at addr ffff888027d8e620 by task kdevtmpfs/22 [ 1104.598277][ T22] [ 1104.600578][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Not tainted 5.14.0-syzkaller #0 [ 1104.608274][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1104.618308][ T22] Call Trace: [ 1104.621573][ T22] dump_stack_lvl+0xcd/0x134 [ 1104.626191][ T22] print_address_description.constprop.0.cold+0x6c/0x309 [ 1104.633251][ T22] ? __d_alloc+0x19a/0x950 [ 1104.637649][ T22] ? __d_alloc+0x19a/0x950 [ 1104.642044][ T22] kasan_report.cold+0x83/0xdf [ 1104.646796][ T22] ? __d_alloc+0x19a/0x950 [ 1104.651195][ T22] kasan_check_range+0x13d/0x180 [ 1104.656149][ T22] memcpy+0x20/0x60 [ 1104.660073][ T22] __d_alloc+0x19a/0x950 [ 1104.664310][ T22] d_alloc+0x4a/0x230 [ 1104.668296][ T22] __lookup_hash+0xc8/0x180 [ 1104.672793][ T22] kern_path_locked+0x17e/0x320 [ 1104.677636][ T22] ? filename_lookup+0x80/0x80 [ 1104.682400][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 1104.687882][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 1104.693322][ T22] handle_remove+0xa2/0x5fe [ 1104.697842][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 1104.702699][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 1104.708751][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 1104.714580][ T22] ? trace_hardirqs_on+0x5b/0x1c0 [ 1104.719611][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 1104.725401][ T22] ? __switch_to+0x5cc/0x1060 [ 1104.730142][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 1104.735632][ T22] ? lock_acquire+0x442/0x510 [ 1104.740292][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 1104.745727][ T22] ? lock_release+0x522/0x720 [ 1104.750382][ T22] ? devtmpfsd+0xaa/0x2a3 [ 1104.754718][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 1104.759548][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 1104.764555][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 1104.769517][ T22] devtmpfsd+0x1b9/0x2a3 [ 1104.773746][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 1104.779294][ T22] kthread+0x3e5/0x4d0 [ 1104.783429][ T22] ? set_kthread_struct+0x130/0x130 [ 1104.788611][ T22] ret_from_fork+0x1f/0x30 [ 1104.793026][ T22] [ 1104.795327][ T22] Allocated by task 22: [ 1104.799456][ T22] kasan_save_stack+0x1b/0x40 [ 1104.804117][ T22] __kasan_slab_alloc+0x83/0xb0 [ 1104.808971][ T22] kmem_cache_alloc+0x285/0x4a0 [ 1104.813805][ T22] getname_kernel+0x4e/0x370 [ 1104.818375][ T22] kern_path_locked+0x71/0x320 [ 1104.823117][ T22] handle_remove+0xa2/0x5fe [ 1104.827606][ T22] devtmpfsd+0x1b9/0x2a3 [ 1104.831841][ T22] kthread+0x3e5/0x4d0 [ 1104.835891][ T22] ret_from_fork+0x1f/0x30 [ 1104.840289][ T22] [ 1104.842592][ T22] Freed by task 22: [ 1104.846376][ T22] kasan_save_stack+0x1b/0x40 [ 1104.851033][ T22] kasan_set_track+0x1c/0x30 [ 1104.855605][ T22] kasan_set_free_info+0x20/0x30 [ 1104.860518][ T22] __kasan_slab_free+0xff/0x130 [ 1104.865350][ T22] slab_free_freelist_hook+0xe3/0x250 [ 1104.870702][ T22] kmem_cache_free+0x8a/0x5b0 [ 1104.875384][ T22] putname.part.0+0xe1/0x120 [ 1104.879952][ T22] kern_path_locked+0xc2/0x320 [ 1104.884697][ T22] handle_remove+0xa2/0x5fe [ 1104.889194][ T22] devtmpfsd+0x1b9/0x2a3 [ 1104.893417][ T22] kthread+0x3e5/0x4d0 [ 1104.897466][ T22] ret_from_fork+0x1f/0x30 [ 1104.901866][ T22] [ 1104.904166][ T22] The buggy address belongs to the object at ffff888027d8e600 [ 1104.904166][ T22] which belongs to the cache names_cache of size 4096 [ 1104.918627][ T22] The buggy address is located 32 bytes inside of [ 1104.918627][ T22] 4096-byte region [ffff888027d8e600, ffff888027d8f600) [ 1104.931877][ T22] The buggy address belongs to the page: [ 1104.937654][ T22] page:ffffea00009f6200 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27d88 [ 1104.947781][ T22] head:ffffea00009f6200 order:3 compound_mapcount:0 compound_pincount:0 [ 1104.956077][ T22] flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) [ 1104.964038][ T22] raw: 00fff00000010200 ffffea0001d02400 0000000300000003 ffff888010dc63c0 [ 1104.972600][ T22] raw: 0000000000000000 0000000080070007 00000001ffffffff 0000000000000000 [ 1104.981156][ T22] page dumped because: kasan: bad access detected [ 1104.987540][ T22] page_owner tracks the page as allocated [ 1104.993228][ 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 1, ts 63629971350, free_ts 63606177157 [ 1105.012058][ T22] get_page_from_freelist+0xa72/0x2f80 [ 1105.017545][ T22] __alloc_pages+0x1b2/0x500 [ 1105.022120][ T22] alloc_pages+0x1a7/0x300 [ 1105.026581][ T22] allocate_slab+0x32e/0x4b0 [ 1105.031152][ T22] ___slab_alloc+0x473/0x7b0 [ 1105.035721][ T22] __slab_alloc.constprop.0+0xa7/0xf0 [ 1105.041072][ T22] kmem_cache_alloc+0x3e1/0x4a0 [ 1105.045900][ T22] getname_flags.part.0+0x50/0x4f0 [ 1105.050997][ T22] getname_flags+0x9a/0xe0 [ 1105.055391][ T22] user_path_at_empty+0x2b/0x90 [ 1105.060225][ T22] vfs_statx+0x142/0x390 [ 1105.064481][ T22] __do_sys_newlstat+0x91/0x110 [ 1105.069314][ T22] do_syscall_64+0x35/0xb0 [ 1105.073759][ T22] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 1105.079654][ T22] page last free stack trace: [ 1105.084299][ T22] free_pcp_prepare+0x2c5/0x780 [ 1105.089129][ T22] free_unref_page+0x19/0x690 [ 1105.093785][ T22] qlist_free_all+0x5a/0xc0 [ 1105.098267][ T22] kasan_quarantine_reduce+0x180/0x200 [ 1105.103708][ T22] __kasan_slab_alloc+0x95/0xb0 [ 1105.108540][ T22] __kmalloc+0x1f4/0x330 [ 1105.112762][ T22] tomoyo_realpath_from_path+0xc3/0x620 [ 1105.118325][ T22] tomoyo_path_perm+0x21b/0x400 [ 1105.123153][ T22] security_inode_getattr+0xcf/0x140 [ 1105.128436][ T22] vfs_statx+0x164/0x390 [ 1105.132662][ T22] __do_sys_newlstat+0x91/0x110 [ 1105.137504][ T22] do_syscall_64+0x35/0xb0 [ 1105.141900][ T22] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 1105.147784][ T22] [ 1105.150086][ T22] Memory state around the buggy address: [ 1105.155695][ T22] ffff888027d8e500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1105.163733][ T22] ffff888027d8e580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1105.171856][ T22] >ffff888027d8e600: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1105.179888][ T22] ^ [ 1105.184975][ T22] ffff888027d8e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1105.193011][ T22] ffff888027d8e700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1105.201045][ T22] ================================================================== [ 1105.213273][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 1105.219865][ T22] CPU: 0 PID: 22 Comm: kdevtmpfs Tainted: G B 5.14.0-syzkaller #0 [ 1105.228973][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 1105.239016][ T22] Call Trace: [ 1105.242306][ T22] dump_stack_lvl+0xcd/0x134 [ 1105.246897][ T22] panic+0x2b0/0x6dd [ 1105.250818][ T22] ? __warn_printk+0xf3/0xf3 [ 1105.255402][ T22] ? preempt_schedule_common+0x59/0xc0 [ 1105.260867][ T22] ? __d_alloc+0x19a/0x950 [ 1105.265283][ T22] ? preempt_schedule_thunk+0x16/0x18 [ 1105.270651][ T22] ? trace_hardirqs_on+0x38/0x1c0 [ 1105.275670][ T22] ? trace_hardirqs_on+0x51/0x1c0 [ 1105.280690][ T22] ? __d_alloc+0x19a/0x950 [ 1105.285098][ T22] ? __d_alloc+0x19a/0x950 [ 1105.289507][ T22] end_report.cold+0x63/0x6f [ 1105.294100][ T22] kasan_report.cold+0x71/0xdf [ 1105.298860][ T22] ? __d_alloc+0x19a/0x950 [ 1105.303270][ T22] kasan_check_range+0x13d/0x180 [ 1105.308217][ T22] memcpy+0x20/0x60 [ 1105.312019][ T22] __d_alloc+0x19a/0x950 [ 1105.316260][ T22] d_alloc+0x4a/0x230 [ 1105.320236][ T22] __lookup_hash+0xc8/0x180 [ 1105.324754][ T22] kern_path_locked+0x17e/0x320 [ 1105.329691][ T22] ? filename_lookup+0x80/0x80 [ 1105.334452][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 1105.340080][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 1105.345530][ T22] handle_remove+0xa2/0x5fe [ 1105.350033][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 1105.354879][ T22] ? cacheinfo_cpu_online.cold+0x3e/0x3e [ 1105.360515][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 1105.366314][ T22] ? trace_hardirqs_on+0x5b/0x1c0 [ 1105.371345][ T22] ? finish_task_switch.isra.0+0x232/0xa50 [ 1105.377153][ T22] ? __switch_to+0x5cc/0x1060 [ 1105.381824][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 1105.387273][ T22] ? lock_acquire+0x442/0x510 [ 1105.391944][ T22] ? rcu_read_lock_sched_held+0xd/0x70 [ 1105.397396][ T22] ? lock_release+0x522/0x720 [ 1105.402065][ T22] ? devtmpfsd+0xaa/0x2a3 [ 1105.406388][ T22] ? lock_downgrade+0x6e0/0x6e0 [ 1105.411231][ T22] ? do_raw_spin_lock+0x120/0x2b0 [ 1105.416249][ T22] ? rwlock_bug.part.0+0x90/0x90 [ 1105.421186][ T22] devtmpfsd+0x1b9/0x2a3 [ 1105.425423][ T22] ? dmar_validate_one_drhd+0x24d/0x24d [ 1105.430961][ T22] kthread+0x3e5/0x4d0 [ 1105.435026][ T22] ? set_kthread_struct+0x130/0x130 [ 1105.440329][ T22] ret_from_fork+0x1f/0x30 [ 1105.445979][ T22] Kernel Offset: disabled [ 1105.450291][ T22] Rebooting in 86400 seconds..