[ 49.984784][ T136] device hsr_slave_1 left promiscuous mode [ 50.084707][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 50.085972][ T136] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 50.087888][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 50.089380][ T136] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 50.090689][ T136] device bridge_slave_1 left promiscuous mode [ 50.092119][ T136] bridge0: port 2(bridge_slave_1) entered disabled state [ 50.135791][ T136] device bridge_slave_0 left promiscuous mode [ 50.136952][ T136] bridge0: port 1(bridge_slave_0) entered disabled state [ 50.284956][ T136] device veth1_macvtap left promiscuous mode [ 50.286078][ T136] device veth0_macvtap left promiscuous mode [ 50.287073][ T136] device veth1_vlan left promiscuous mode [ 50.288045][ T136] device veth0_vlan left promiscuous mode [ 50.383151][ T136] team0 (unregistering): Port device team_slave_1 removed [ 50.387379][ T136] team0 (unregistering): Port device team_slave_0 removed [ 50.391476][ T136] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 50.408540][ T136] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 50.548386][ T136] bond0 (unregistering): Released all slaves [ 53.280347][ T136] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 53.318389][ T136] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 53.357401][ T136] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 53.408557][ T136] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 54.980696][ T136] device hsr_slave_0 left promiscuous mode [ 55.014990][ T136] device hsr_slave_1 left promiscuous mode [ 55.094488][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 55.095713][ T136] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 55.097115][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 55.098146][ T136] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 55.099498][ T136] device bridge_slave_1 left promiscuous mode [ 55.100508][ T136] bridge0: port 2(bridge_slave_1) entered disabled state [ 55.135376][ T136] device bridge_slave_0 left promiscuous mode [ 55.136387][ T136] bridge0: port 1(bridge_slave_0) entered disabled state [ 55.274575][ T136] device veth1_macvtap left promiscuous mode [ 55.275525][ T136] device veth0_macvtap left promiscuous mode [ 55.276515][ T136] device veth1_vlan left promiscuous mode [ 55.277386][ T136] device veth0_vlan left promiscuous mode [ 55.362308][ T136] team0 (unregistering): Port device team_slave_1 removed [ 55.366337][ T136] team0 (unregistering): Port device team_slave_0 removed [ 55.370019][ T136] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 55.398373][ T136] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 55.497999][ T136] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.0.208' (ED25519) to the list of known hosts. 1970/01/01 00:00:55 ignoring optional flag "type"="gce" 1970/01/01 00:00:56 parsed 1 programs [ 57.354325][ T4346] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SSFS [ 59.525982][ T4371] chnl_net:caif_netlink_parms(): no params data found [ 59.543995][ T4371] bridge0: port 1(bridge_slave_0) entered blocking state [ 59.545698][ T4371] bridge0: port 1(bridge_slave_0) entered disabled state [ 59.547153][ T4371] device bridge_slave_0 entered promiscuous mode [ 59.550570][ T4371] bridge0: port 2(bridge_slave_1) entered blocking state [ 59.551685][ T4371] bridge0: port 2(bridge_slave_1) entered disabled state [ 59.553155][ T4371] device bridge_slave_1 entered promiscuous mode [ 59.560670][ T4371] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 59.564648][ T4371] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 59.572173][ T4371] team0: Port device team_slave_0 added [ 59.574079][ T4371] team0: Port device team_slave_1 added [ 59.580751][ T4371] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 59.582016][ T4371] 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. [ 59.586387][ T4371] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 59.590018][ T4371] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 59.591107][ T4371] 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. [ 59.594887][ T4371] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 59.635810][ T4371] device hsr_slave_0 entered promiscuous mode [ 59.684647][ T4371] device hsr_slave_1 entered promiscuous mode [ 60.219434][ T4371] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 60.245774][ T4371] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 60.267349][ T4371] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 60.295692][ T4371] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 60.391541][ T4371] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.392785][ T4371] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.393944][ T4371] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.395079][ T4371] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.430542][ T4371] 8021q: adding VLAN 0 to HW filter on device bond0 [ 60.439827][ T585] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 60.441883][ T585] bridge0: port 1(bridge_slave_0) entered disabled state [ 60.443475][ T585] bridge0: port 2(bridge_slave_1) entered disabled state [ 60.448172][ T4371] 8021q: adding VLAN 0 to HW filter on device team0 [ 60.451206][ T585] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 60.452658][ T585] bridge0: port 1(bridge_slave_0) entered blocking state [ 60.453727][ T585] bridge0: port 1(bridge_slave_0) entered forwarding state [ 60.457820][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 60.459217][ T343] bridge0: port 2(bridge_slave_1) entered blocking state [ 60.460291][ T343] bridge0: port 2(bridge_slave_1) entered forwarding state [ 60.469082][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 60.471565][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 60.475831][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 60.480003][ T585] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 60.483527][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 60.548225][ T4371] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 60.569783][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 60.571086][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 60.572264][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 60.573818][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 60.580490][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 60.582084][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 60.584216][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 60.586664][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 60.589520][ T4371] device veth0_vlan entered promiscuous mode [ 60.593784][ T4371] device veth1_vlan entered promiscuous mode [ 60.609703][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 60.611279][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 60.612848][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 60.614376][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 60.621771][ T4371] device veth0_macvtap entered promiscuous mode [ 60.624897][ T4371] device veth1_macvtap entered promiscuous mode [ 60.630563][ T4371] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 60.631819][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 60.633274][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 60.636335][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 60.638063][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 60.641533][ T4371] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 60.643511][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 60.648896][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 60.651291][ T4371] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 60.656424][ T4371] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 60.657933][ T4371] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 60.659463][ T4371] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 60.750938][ T343] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 60.752265][ T343] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 60.753595][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 60.773002][ T343] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 60.774331][ T343] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 60.776225][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 61.329577][ T136] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 63.757592][ T136] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 66.008345][ T136] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 66.047949][ T136] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 1970/01/01 00:01:06 executed programs: 0 [ 66.622250][ T4694] chnl_net:caif_netlink_parms(): no params data found [ 66.640763][ T4694] bridge0: port 1(bridge_slave_0) entered blocking state [ 66.641993][ T4694] bridge0: port 1(bridge_slave_0) entered disabled state [ 66.643468][ T4694] device bridge_slave_0 entered promiscuous mode [ 66.646247][ T4694] bridge0: port 2(bridge_slave_1) entered blocking state [ 66.647334][ T4694] bridge0: port 2(bridge_slave_1) entered disabled state [ 66.648711][ T4694] device bridge_slave_1 entered promiscuous mode [ 66.661587][ T4694] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 66.664118][ T4694] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 66.672956][ T4694] team0: Port device team_slave_0 added [ 66.675966][ T4694] team0: Port device team_slave_1 added [ 66.683386][ T4694] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 66.684849][ T4694] 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. [ 66.688758][ T4694] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 66.691138][ T4694] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 66.692184][ T4694] 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. [ 66.696673][ T4694] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 66.745738][ T4694] device hsr_slave_0 entered promiscuous mode [ 66.764809][ T4694] device hsr_slave_1 entered promiscuous mode [ 66.814568][ T4694] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 66.815773][ T4694] Cannot create hsr debugfs directory [ 67.193069][ T4694] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 67.215990][ T4694] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 67.245020][ T4694] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 67.287287][ T4694] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 67.343960][ T4694] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.345219][ T4694] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.346342][ T4694] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.347410][ T4694] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.365473][ T4694] 8021q: adding VLAN 0 to HW filter on device bond0 [ 67.369238][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 67.370992][ T343] bridge0: port 1(bridge_slave_0) entered disabled state [ 67.372612][ T343] bridge0: port 2(bridge_slave_1) entered disabled state [ 67.376043][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 67.387138][ T4694] 8021q: adding VLAN 0 to HW filter on device team0 [ 67.393075][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 67.394923][ T1722] bridge0: port 1(bridge_slave_0) entered blocking state [ 67.395944][ T1722] bridge0: port 1(bridge_slave_0) entered forwarding state [ 67.397358][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 67.398986][ T1722] bridge0: port 2(bridge_slave_1) entered blocking state [ 67.400136][ T1722] bridge0: port 2(bridge_slave_1) entered forwarding state [ 67.407231][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 67.408878][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 67.412211][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 67.421660][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 67.426845][ T4694] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 67.428808][ T4694] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 67.430461][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 67.473681][ T4694] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 67.475930][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 67.477156][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 67.483887][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 67.493033][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 67.495044][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 67.496445][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 67.499376][ T4694] device veth0_vlan entered promiscuous mode [ 67.503353][ T4694] device veth1_vlan entered promiscuous mode [ 67.511150][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 67.512708][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 67.514247][ T343] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 67.532346][ T4694] device veth0_macvtap entered promiscuous mode [ 67.535276][ T4694] device veth1_macvtap entered promiscuous mode [ 67.540042][ T4694] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 [ 67.541621][ T4694] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 67.543792][ T4694] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 67.546629][ T4694] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 [ 67.548259][ T4694] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 67.550476][ T4694] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 67.551658][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 67.553434][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 67.555706][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 67.559281][ T4694] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.560589][ T4694] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.561833][ T4694] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.563072][ T4694] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 67.582927][ T1643] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 67.584368][ T1643] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 67.587987][ T1722] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 67.596929][ T1643] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 67.598194][ T1643] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 67.599703][ T1643] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 67.743608][ T4805] loop0: detected capacity change from 0 to 32768 [ 67.787104][ T4805] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.15 (4805) [ 67.797254][ T4805] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 67.798734][ T4805] BTRFS info (device loop0): using free space tree [ 67.799879][ T4805] BTRFS info (device loop0): has skinny extents [ 67.812801][ T4805] BTRFS info (device loop0): enabling ssd optimizations [ 67.822548][ T4805] FAULT_INJECTION: forcing a failure. [ 67.822548][ T4805] name failslab, interval 1, probability 0, space 0, times 1 [ 67.825611][ T4805] CPU: 0 PID: 4805 Comm: syz.0.15 Not tainted syzkaller #0 [ 67.826791][ T4805] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 67.828355][ T4805] Call trace: [ 67.828830][ T4805] dump_backtrace+0x0/0x458 [ 67.829625][ T4805] show_stack+0x2c/0x3c [ 67.830352][ T4805] __dump_stack+0x30/0x40 [ 67.831015][ T4805] dump_stack_lvl+0xf4/0x15c [ 67.831686][ T4805] dump_stack+0x1c/0x5c [ 67.832312][ T4805] should_fail+0x3c8/0x520 [ 67.832991][ T4805] __should_failslab+0xbc/0x10c [ 67.833731][ T4805] should_failslab+0x10/0x28 [ 67.834418][ T4805] slab_pre_alloc_hook+0x64/0xe8 [ 67.835263][ T4805] kmem_cache_alloc_trace+0x98/0x3f0 [ 67.836154][ T4805] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 67.837220][ T4805] __btrfs_unlink_inode+0x34c/0xab8 [ 67.838078][ T4805] btrfs_unlink+0x10c/0x25c [ 67.838849][ T4805] vfs_unlink+0x2e0/0x4f4 [ 67.839590][ T4805] do_unlinkat+0x318/0x624 [ 67.840478][ T4805] __arm64_sys_unlinkat+0xe0/0xfc [ 67.841436][ T4805] invoke_syscall+0x98/0x28c [ 67.842333][ T4805] el0_svc_common+0x13c/0x258 [ 67.843182][ T4805] do_el0_svc+0x5c/0x140 [ 67.843898][ T4805] el0_svc+0x78/0x1d0 [ 67.844666][ T4805] el0t_64_sync_handler+0xcc/0xe4 [ 67.845636][ T4805] el0t_64_sync+0x1a0/0x1a4 [ 67.853403][ T4805] ------------[ cut here ]------------ [ 67.854310][ T4805] WARNING: CPU: 0 PID: 4805 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 67.855828][ T4805] Modules linked in: [ 67.856577][ T4805] CPU: 0 PID: 4805 Comm: syz.0.15 Not tainted syzkaller #0 [ 67.857771][ T4805] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 67.859452][ T4805] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 67.860627][ T4805] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 67.861530][ T4805] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 67.862420][ T4805] sp : ffff800021ba7a80 [ 67.863110][ T4805] x29: ffff800021ba7b10 x28: 0000000000000104 x27: ffff0000e2af4010 [ 67.864380][ T4805] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c218abb0 [ 67.865660][ T4805] x23: ffff0000ded0b0b0 x22: ffff0000d0e68000 x21: 1fffe0001bda1621 [ 67.866994][ T4805] x20: ffff0000ded0b108 x19: dfff800000000000 x18: 0000000000000000 [ 67.868337][ T4805] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 67.869710][ T4805] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 67.870984][ T4805] x11: ff8080000830061c x10: 0000000000000000 x9 : 98439be3dfdf9900 [ 67.872303][ T4805] x8 : 98439be3dfdf9900 x7 : 0000000000000001 x6 : 0000000000000001 [ 67.873616][ T4805] x5 : ffff800021ba7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 67.874912][ T4805] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 67.876270][ T4805] Call trace: [ 67.876868][ T4805] __btrfs_unlink_inode+0x8d8/0xab8 [ 67.877825][ T4805] btrfs_unlink+0x10c/0x25c [ 67.878631][ T4805] vfs_unlink+0x2e0/0x4f4 [ 67.879367][ T4805] do_unlinkat+0x318/0x624 [ 67.880107][ T4805] __arm64_sys_unlinkat+0xe0/0xfc [ 67.880950][ T4805] invoke_syscall+0x98/0x28c [ 67.881770][ T4805] el0_svc_common+0x13c/0x258 [ 67.882587][ T4805] do_el0_svc+0x5c/0x140 [ 67.883299][ T4805] el0_svc+0x78/0x1d0 [ 67.883961][ T4805] el0t_64_sync_handler+0xcc/0xe4 [ 67.884815][ T4805] el0t_64_sync+0x1a0/0x1a4 [ 67.885543][ T4805] irq event stamp: 81178 [ 67.886262][ T4805] hardirqs last enabled at (81177): [] __up_console_sem+0xb4/0xfc [ 67.887870][ T4805] hardirqs last disabled at (81178): [] el1_dbg+0x24/0x80 [ 67.889311][ T4805] softirqs last enabled at (81158): [] handle_softirqs+0xa70/0xc14 [ 67.890832][ T4805] softirqs last disabled at (81089): [] __irq_exit_rcu+0x240/0x434 [ 67.892412][ T4805] ---[ end trace 8bb78f314527dfcb ]--- [ 67.896426][ T4805] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 67.898068][ T4805] BTRFS info (device loop0): forced readonly [ 68.062278][ T4852] loop0: detected capacity change from 0 to 32768 [ 68.106901][ T4852] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.16 (4852) [ 68.110061][ T4852] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 68.112012][ T4852] BTRFS info (device loop0): using free space tree [ 68.112970][ T4852] BTRFS info (device loop0): has skinny extents [ 68.127996][ T4852] BTRFS info (device loop0): enabling ssd optimizations [ 68.132851][ T4852] FAULT_INJECTION: forcing a failure. [ 68.132851][ T4852] name failslab, interval 1, probability 0, space 0, times 0 [ 68.135370][ T4852] CPU: 0 PID: 4852 Comm: syz.0.16 Tainted: G W syzkaller #0 [ 68.136687][ T4852] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.138274][ T4852] Call trace: [ 68.138740][ T4852] dump_backtrace+0x0/0x458 [ 68.139407][ T4852] show_stack+0x2c/0x3c [ 68.140010][ T4852] __dump_stack+0x30/0x40 [ 68.140776][ T4852] dump_stack_lvl+0xf4/0x15c [ 68.141532][ T4852] dump_stack+0x1c/0x5c [ 68.142207][ T4852] should_fail+0x3c8/0x520 [ 68.142878][ T4852] __should_failslab+0xbc/0x10c [ 68.143740][ T4852] should_failslab+0x10/0x28 [ 68.144447][ T4852] slab_pre_alloc_hook+0x64/0xe8 [ 68.145342][ T4852] kmem_cache_alloc_trace+0x98/0x3f0 [ 68.146155][ T4852] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 68.147155][ T4852] __btrfs_unlink_inode+0x34c/0xab8 [ 68.147892][ T4852] btrfs_unlink+0x10c/0x25c [ 68.148611][ T4852] vfs_unlink+0x2e0/0x4f4 [ 68.149276][ T4852] do_unlinkat+0x318/0x624 [ 68.149963][ T4852] __arm64_sys_unlinkat+0xe0/0xfc [ 68.150729][ T4852] invoke_syscall+0x98/0x28c [ 68.151478][ T4852] el0_svc_common+0x13c/0x258 [ 68.152238][ T4852] do_el0_svc+0x5c/0x140 [ 68.152955][ T4852] el0_svc+0x78/0x1d0 [ 68.153544][ T4852] el0t_64_sync_handler+0xcc/0xe4 [ 68.154453][ T4852] el0t_64_sync+0x1a0/0x1a4 [ 68.157032][ T4852] ------------[ cut here ]------------ [ 68.157932][ T4852] WARNING: CPU: 0 PID: 4852 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 68.159323][ T4852] Modules linked in: [ 68.159908][ T4852] CPU: 0 PID: 4852 Comm: syz.0.16 Tainted: G W syzkaller #0 [ 68.161190][ T4852] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.162642][ T4852] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 68.163947][ T4852] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 68.164890][ T4852] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 68.165887][ T4852] sp : ffff8000222b7a80 [ 68.166539][ T4852] x29: ffff8000222b7b10 x28: 0000000000000104 x27: ffff0000e2af4410 [ 68.167971][ T4852] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c19d2bb0 [ 68.169271][ T4852] x23: ffff0000ded0b210 x22: ffff0000cd88e000 x21: 1fffe0001bda164d [ 68.170517][ T4852] x20: ffff0000ded0b268 x19: dfff800000000000 x18: 0000000000000000 [ 68.171823][ T4852] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 68.173085][ T4852] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 68.174346][ T4852] x11: ff8080000830061c x10: 0000000000000000 x9 : 806b3cccecbda900 [ 68.175669][ T4852] x8 : 806b3cccecbda900 x7 : 0000000000000001 x6 : 0000000000000001 [ 68.176876][ T4852] x5 : ffff8000222b7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 68.178069][ T4852] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 68.179394][ T4852] Call trace: [ 68.179882][ T4852] __btrfs_unlink_inode+0x8d8/0xab8 [ 68.180734][ T4852] btrfs_unlink+0x10c/0x25c [ 68.181461][ T4852] vfs_unlink+0x2e0/0x4f4 [ 68.182166][ T4852] do_unlinkat+0x318/0x624 [ 68.182820][ T4852] __arm64_sys_unlinkat+0xe0/0xfc [ 68.183557][ T4852] invoke_syscall+0x98/0x28c [ 68.184231][ T4852] el0_svc_common+0x13c/0x258 [ 68.184972][ T4852] do_el0_svc+0x5c/0x140 [ 68.185623][ T4852] el0_svc+0x78/0x1d0 [ 68.186216][ T4852] el0t_64_sync_handler+0xcc/0xe4 [ 68.187049][ T4852] el0t_64_sync+0x1a0/0x1a4 [ 68.187879][ T4852] irq event stamp: 79068 [ 68.188671][ T4852] hardirqs last enabled at (79067): [] __up_console_sem+0xb4/0xfc [ 68.190151][ T4852] hardirqs last disabled at (79068): [] el1_dbg+0x24/0x80 [ 68.191501][ T4852] softirqs last enabled at (79048): [] handle_softirqs+0xa70/0xc14 [ 68.193107][ T4852] softirqs last disabled at (79005): [] __irq_exit_rcu+0x240/0x434 [ 68.194707][ T4852] ---[ end trace 8bb78f314527dfcc ]--- [ 68.197855][ T4852] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 68.199290][ T4852] BTRFS info (device loop0): forced readonly [ 68.336720][ T4875] loop0: detected capacity change from 0 to 32768 [ 68.407015][ T4875] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.17 (4875) [ 68.409775][ T4875] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 68.411197][ T4875] BTRFS info (device loop0): using free space tree [ 68.412138][ T4875] BTRFS info (device loop0): has skinny extents [ 68.432928][ T4875] BTRFS info (device loop0): enabling ssd optimizations [ 68.437748][ T4875] FAULT_INJECTION: forcing a failure. [ 68.437748][ T4875] name failslab, interval 1, probability 0, space 0, times 0 [ 68.439721][ T4875] CPU: 1 PID: 4875 Comm: syz.0.17 Tainted: G W syzkaller #0 [ 68.441022][ T4875] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.442587][ T4875] Call trace: [ 68.443198][ T4875] dump_backtrace+0x0/0x458 [ 68.443959][ T4875] show_stack+0x2c/0x3c [ 68.444654][ T4875] __dump_stack+0x30/0x40 [ 68.445309][ T4875] dump_stack_lvl+0xf4/0x15c [ 68.446060][ T4875] dump_stack+0x1c/0x5c [ 68.446745][ T4875] should_fail+0x3c8/0x520 [ 68.447550][ T4875] __should_failslab+0xbc/0x10c [ 68.448360][ T4875] should_failslab+0x10/0x28 [ 68.449118][ T4875] slab_pre_alloc_hook+0x64/0xe8 [ 68.449992][ T4875] kmem_cache_alloc_trace+0x98/0x3f0 [ 68.450836][ T4875] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 68.451741][ T4875] __btrfs_unlink_inode+0x34c/0xab8 [ 68.452597][ T4875] btrfs_unlink+0x10c/0x25c [ 68.453345][ T4875] vfs_unlink+0x2e0/0x4f4 [ 68.454047][ T4875] do_unlinkat+0x318/0x624 [ 68.454734][ T4875] __arm64_sys_unlinkat+0xe0/0xfc [ 68.455559][ T4875] invoke_syscall+0x98/0x28c [ 68.456257][ T4875] el0_svc_common+0x13c/0x258 [ 68.457025][ T4875] do_el0_svc+0x5c/0x140 [ 68.457682][ T4875] el0_svc+0x78/0x1d0 [ 68.458330][ T4875] el0t_64_sync_handler+0xcc/0xe4 [ 68.459197][ T4875] el0t_64_sync+0x1a0/0x1a4 [ 68.460997][ T4875] ------------[ cut here ]------------ [ 68.461928][ T4875] WARNING: CPU: 1 PID: 4875 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 68.463474][ T4875] Modules linked in: [ 68.464030][ T4875] CPU: 1 PID: 4875 Comm: syz.0.17 Tainted: G W syzkaller #0 [ 68.465426][ T4875] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.467077][ T4875] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 68.468332][ T4875] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 68.469257][ T4875] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 68.470116][ T4875] sp : ffff800022397a80 [ 68.470797][ T4875] x29: ffff800022397b10 x28: 0000000000000104 x27: ffff0000ec86c010 [ 68.472187][ T4875] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d2a66c60 [ 68.473494][ T4875] x23: ffff0000defe90b0 x22: ffff0000d5d08000 x21: 1fffe0001bdfd221 [ 68.474758][ T4875] x20: ffff0000defe9108 x19: dfff800000000000 x18: 0000000000000000 [ 68.476194][ T4875] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 68.477490][ T4875] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 68.478872][ T4875] x11: ff8080000830061c x10: 0000000000000000 x9 : a90a4b5db08f1300 [ 68.480163][ T4875] x8 : a90a4b5db08f1300 x7 : 0000000000000001 x6 : 0000000000000001 [ 68.481607][ T4875] x5 : ffff800022397398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 68.482979][ T4875] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 68.484237][ T4875] Call trace: [ 68.484798][ T4875] __btrfs_unlink_inode+0x8d8/0xab8 [ 68.485623][ T4875] btrfs_unlink+0x10c/0x25c [ 68.486348][ T4875] vfs_unlink+0x2e0/0x4f4 [ 68.487041][ T4875] do_unlinkat+0x318/0x624 [ 68.487780][ T4875] __arm64_sys_unlinkat+0xe0/0xfc [ 68.488602][ T4875] invoke_syscall+0x98/0x28c [ 68.489397][ T4875] el0_svc_common+0x13c/0x258 [ 68.490179][ T4875] do_el0_svc+0x5c/0x140 [ 68.490846][ T4875] el0_svc+0x78/0x1d0 [ 68.491477][ T4875] el0t_64_sync_handler+0xcc/0xe4 [ 68.492332][ T4875] el0t_64_sync+0x1a0/0x1a4 [ 68.493040][ T4875] irq event stamp: 79960 [ 68.493700][ T4875] hardirqs last enabled at (79959): [] __up_console_sem+0xb4/0xfc [ 68.495229][ T4875] hardirqs last disabled at (79960): [] el1_dbg+0x24/0x80 [ 68.496744][ T4875] softirqs last enabled at (79940): [] handle_softirqs+0xa70/0xc14 [ 68.498375][ T4875] softirqs last disabled at (79869): [] __irq_exit_rcu+0x240/0x434 [ 68.500034][ T4875] ---[ end trace 8bb78f314527dfcd ]--- [ 68.502907][ T4875] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 68.504547][ T4875] BTRFS info (device loop0): forced readonly [ 68.645915][ T4845] Bluetooth: hci0: command 0x0409 tx timeout [ 68.650631][ T4897] loop0: detected capacity change from 0 to 32768 [ 68.695906][ T4897] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.18 (4897) [ 68.737425][ T4897] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 68.739037][ T4897] BTRFS info (device loop0): using free space tree [ 68.740041][ T4897] BTRFS info (device loop0): has skinny extents [ 68.752444][ T4897] BTRFS info (device loop0): enabling ssd optimizations [ 68.766195][ T4897] FAULT_INJECTION: forcing a failure. [ 68.766195][ T4897] name failslab, interval 1, probability 0, space 0, times 0 [ 68.768150][ T4897] CPU: 0 PID: 4897 Comm: syz.0.18 Tainted: G W syzkaller #0 [ 68.769526][ T4897] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.771181][ T4897] Call trace: [ 68.771766][ T4897] dump_backtrace+0x0/0x458 [ 68.772521][ T4897] show_stack+0x2c/0x3c [ 68.773186][ T4897] __dump_stack+0x30/0x40 [ 68.773935][ T4897] dump_stack_lvl+0xf4/0x15c [ 68.774739][ T4897] dump_stack+0x1c/0x5c [ 68.775447][ T4897] should_fail+0x3c8/0x520 [ 68.776142][ T4897] __should_failslab+0xbc/0x10c [ 68.776931][ T4897] should_failslab+0x10/0x28 [ 68.777661][ T4897] slab_pre_alloc_hook+0x64/0xe8 [ 68.778439][ T4897] kmem_cache_alloc_trace+0x98/0x3f0 [ 68.779259][ T4897] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 68.780196][ T4897] __btrfs_unlink_inode+0x34c/0xab8 [ 68.781084][ T4897] btrfs_unlink+0x10c/0x25c [ 68.781873][ T4897] vfs_unlink+0x2e0/0x4f4 [ 68.782575][ T4897] do_unlinkat+0x318/0x624 [ 68.783295][ T4897] __arm64_sys_unlinkat+0xe0/0xfc [ 68.784061][ T4897] invoke_syscall+0x98/0x28c [ 68.784806][ T4897] el0_svc_common+0x13c/0x258 [ 68.785497][ T4897] do_el0_svc+0x5c/0x140 [ 68.786181][ T4897] el0_svc+0x78/0x1d0 [ 68.786820][ T4897] el0t_64_sync_handler+0xcc/0xe4 [ 68.787618][ T4897] el0t_64_sync+0x1a0/0x1a4 [ 68.789374][ T4897] ------------[ cut here ]------------ [ 68.790230][ T4897] WARNING: CPU: 0 PID: 4897 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 68.791720][ T4897] Modules linked in: [ 68.792271][ T4897] CPU: 0 PID: 4897 Comm: syz.0.18 Tainted: G W syzkaller #0 [ 68.793581][ T4897] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 68.795199][ T4897] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 68.796394][ T4897] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 68.797331][ T4897] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 68.798310][ T4897] sp : ffff800022397a80 [ 68.799000][ T4897] x29: ffff800022397b10 x28: 0000000000000104 x27: ffff0000e2af4810 [ 68.800224][ T4897] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d5640210 [ 68.801486][ T4897] x23: ffff0000ded0b370 x22: ffff0000d94e0000 x21: 1fffe0001bda1679 [ 68.802712][ T4897] x20: ffff0000ded0b3c8 x19: dfff800000000000 x18: 0000000000000000 [ 68.803927][ T4897] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 68.805133][ T4897] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 68.806339][ T4897] x11: ff8080000830061c x10: 0000000000000000 x9 : 087e9b6fc1c79900 [ 68.807585][ T4897] x8 : 087e9b6fc1c79900 x7 : 0000000000000001 x6 : 0000000000000001 [ 68.808873][ T4897] x5 : ffff800022397398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 68.810106][ T4897] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 68.811460][ T4897] Call trace: [ 68.811990][ T4897] __btrfs_unlink_inode+0x8d8/0xab8 [ 68.812791][ T4897] btrfs_unlink+0x10c/0x25c [ 68.813549][ T4897] vfs_unlink+0x2e0/0x4f4 [ 68.814189][ T4897] do_unlinkat+0x318/0x624 [ 68.814908][ T4897] __arm64_sys_unlinkat+0xe0/0xfc [ 68.815649][ T4897] invoke_syscall+0x98/0x28c [ 68.816425][ T4897] el0_svc_common+0x13c/0x258 [ 68.817157][ T4897] do_el0_svc+0x5c/0x140 [ 68.817892][ T4897] el0_svc+0x78/0x1d0 [ 68.818533][ T4897] el0t_64_sync_handler+0xcc/0xe4 [ 68.819374][ T4897] el0t_64_sync+0x1a0/0x1a4 [ 68.820204][ T4897] irq event stamp: 79224 [ 68.820843][ T4897] hardirqs last enabled at (79223): [] __up_console_sem+0xb4/0xfc [ 68.822337][ T4897] hardirqs last disabled at (79224): [] el1_dbg+0x24/0x80 [ 68.823652][ T4897] softirqs last enabled at (79204): [] handle_softirqs+0xa70/0xc14 [ 68.825085][ T4897] softirqs last disabled at (79185): [] __irq_exit_rcu+0x240/0x434 [ 68.826608][ T4897] ---[ end trace 8bb78f314527dfce ]--- [ 68.830391][ T4897] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 68.831952][ T4897] BTRFS info (device loop0): forced readonly [ 69.001465][ T4919] loop0: detected capacity change from 0 to 32768 [ 69.045799][ T4919] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.19 (4919) [ 69.087635][ T4919] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 69.089147][ T4919] BTRFS info (device loop0): using free space tree [ 69.090121][ T4919] BTRFS info (device loop0): has skinny extents [ 69.100815][ T4919] BTRFS info (device loop0): enabling ssd optimizations [ 69.116228][ T4919] FAULT_INJECTION: forcing a failure. [ 69.116228][ T4919] name failslab, interval 1, probability 0, space 0, times 0 [ 69.118163][ T4919] CPU: 0 PID: 4919 Comm: syz.0.19 Tainted: G W syzkaller #0 [ 69.119420][ T4919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.120962][ T4919] Call trace: [ 69.121453][ T4919] dump_backtrace+0x0/0x458 [ 69.122113][ T4919] show_stack+0x2c/0x3c [ 69.122725][ T4919] __dump_stack+0x30/0x40 [ 69.123350][ T4919] dump_stack_lvl+0xf4/0x15c [ 69.124007][ T4919] dump_stack+0x1c/0x5c [ 69.124623][ T4919] should_fail+0x3c8/0x520 [ 69.125328][ T4919] __should_failslab+0xbc/0x10c [ 69.126043][ T4919] should_failslab+0x10/0x28 [ 69.126774][ T4919] slab_pre_alloc_hook+0x64/0xe8 [ 69.127521][ T4919] kmem_cache_alloc_trace+0x98/0x3f0 [ 69.128341][ T4919] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 69.129326][ T4919] __btrfs_unlink_inode+0x34c/0xab8 [ 69.130205][ T4919] btrfs_unlink+0x10c/0x25c [ 69.130969][ T4919] vfs_unlink+0x2e0/0x4f4 [ 69.131608][ T4919] do_unlinkat+0x318/0x624 [ 69.132353][ T4919] __arm64_sys_unlinkat+0xe0/0xfc [ 69.133156][ T4919] invoke_syscall+0x98/0x28c [ 69.133936][ T4919] el0_svc_common+0x13c/0x258 [ 69.134650][ T4919] do_el0_svc+0x5c/0x140 [ 69.135303][ T4919] el0_svc+0x78/0x1d0 [ 69.135967][ T4919] el0t_64_sync_handler+0xcc/0xe4 [ 69.136813][ T4919] el0t_64_sync+0x1a0/0x1a4 [ 69.140093][ T4919] ------------[ cut here ]------------ [ 69.140988][ T4919] WARNING: CPU: 0 PID: 4919 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 69.142341][ T4919] Modules linked in: [ 69.142947][ T4919] CPU: 0 PID: 4919 Comm: syz.0.19 Tainted: G W syzkaller #0 [ 69.144206][ T4919] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.145811][ T4919] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 69.147016][ T4919] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 69.147946][ T4919] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 69.148777][ T4919] sp : ffff800022707a80 [ 69.149432][ T4919] x29: ffff800022707b10 x28: 0000000000000104 x27: ffff0000ec86c410 [ 69.150656][ T4919] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d5640a50 [ 69.151827][ T4919] x23: ffff0000ded0b420 x22: ffff0000c17fa000 x21: 1fffe0001bda168f [ 69.153072][ T4919] x20: ffff0000ded0b478 x19: dfff800000000000 x18: 0000000000000000 [ 69.154245][ T4919] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 69.155532][ T4919] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 69.156704][ T4919] x11: ff8080000830061c x10: 0000000000000000 x9 : 51351f6475437a00 [ 69.157882][ T4919] x8 : 51351f6475437a00 x7 : 0000000000000001 x6 : 0000000000000001 [ 69.159183][ T4919] x5 : ffff800022707398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 69.160426][ T4919] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 69.161665][ T4919] Call trace: [ 69.162148][ T4919] __btrfs_unlink_inode+0x8d8/0xab8 [ 69.162918][ T4919] btrfs_unlink+0x10c/0x25c [ 69.163617][ T4919] vfs_unlink+0x2e0/0x4f4 [ 69.164264][ T4919] do_unlinkat+0x318/0x624 [ 69.164931][ T4919] __arm64_sys_unlinkat+0xe0/0xfc [ 69.165764][ T4919] invoke_syscall+0x98/0x28c [ 69.166480][ T4919] el0_svc_common+0x13c/0x258 [ 69.167235][ T4919] do_el0_svc+0x5c/0x140 [ 69.167953][ T4919] el0_svc+0x78/0x1d0 [ 69.168556][ T4919] el0t_64_sync_handler+0xcc/0xe4 [ 69.169343][ T4919] el0t_64_sync+0x1a0/0x1a4 [ 69.170127][ T4919] irq event stamp: 79320 [ 69.170789][ T4919] hardirqs last enabled at (79319): [] __up_console_sem+0xb4/0xfc [ 69.172311][ T4919] hardirqs last disabled at (79320): [] el1_dbg+0x24/0x80 [ 69.173634][ T4919] softirqs last enabled at (79300): [] handle_softirqs+0xa70/0xc14 [ 69.175208][ T4919] softirqs last disabled at (79225): [] __irq_exit_rcu+0x240/0x434 [ 69.176723][ T4919] ---[ end trace 8bb78f314527dfcf ]--- [ 69.186498][ T136] device hsr_slave_0 left promiscuous mode [ 69.188035][ T4919] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 69.189546][ T4919] BTRFS info (device loop0): forced readonly [ 69.216732][ T136] device hsr_slave_1 left promiscuous mode [ 69.304602][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 69.305915][ T136] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 69.307868][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 69.309029][ T136] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 69.310523][ T136] device bridge_slave_1 left promiscuous mode [ 69.311629][ T136] bridge0: port 2(bridge_slave_1) entered disabled state [ 69.331100][ T4941] loop0: detected capacity change from 0 to 32768 [ 69.334159][ T4941] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.20 (4941) [ 69.337366][ T136] device bridge_slave_0 left promiscuous mode [ 69.338421][ T136] bridge0: port 1(bridge_slave_0) entered disabled state [ 69.342234][ T4941] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 69.343657][ T4941] BTRFS info (device loop0): using free space tree [ 69.345124][ T4941] BTRFS info (device loop0): has skinny extents [ 69.354016][ T4941] BTRFS info (device loop0): enabling ssd optimizations [ 69.358482][ T4941] FAULT_INJECTION: forcing a failure. [ 69.358482][ T4941] name failslab, interval 1, probability 0, space 0, times 0 [ 69.360344][ T4941] CPU: 0 PID: 4941 Comm: syz.0.20 Tainted: G W syzkaller #0 [ 69.361627][ T4941] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.363027][ T4941] Call trace: [ 69.363528][ T4941] dump_backtrace+0x0/0x458 [ 69.364187][ T4941] show_stack+0x2c/0x3c [ 69.364917][ T4941] __dump_stack+0x30/0x40 [ 69.365682][ T4941] dump_stack_lvl+0xf4/0x15c [ 69.366382][ T4941] dump_stack+0x1c/0x5c [ 69.367027][ T4941] should_fail+0x3c8/0x520 [ 69.367730][ T4941] __should_failslab+0xbc/0x10c [ 69.368467][ T4941] should_failslab+0x10/0x28 [ 69.369166][ T4941] slab_pre_alloc_hook+0x64/0xe8 [ 69.369982][ T4941] kmem_cache_alloc_trace+0x98/0x3f0 [ 69.370859][ T4941] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 69.371855][ T4941] __btrfs_unlink_inode+0x34c/0xab8 [ 69.372647][ T4941] btrfs_unlink+0x10c/0x25c [ 69.373321][ T4941] vfs_unlink+0x2e0/0x4f4 [ 69.374027][ T4941] do_unlinkat+0x318/0x624 [ 69.374636][ T4941] __arm64_sys_unlinkat+0xe0/0xfc [ 69.375375][ T4941] invoke_syscall+0x98/0x28c [ 69.376113][ T4941] el0_svc_common+0x13c/0x258 [ 69.376827][ T4941] do_el0_svc+0x5c/0x140 [ 69.377478][ T4941] el0_svc+0x78/0x1d0 [ 69.378111][ T4941] el0t_64_sync_handler+0xcc/0xe4 [ 69.378922][ T4941] el0t_64_sync+0x1a0/0x1a4 [ 69.381790][ T4941] ------------[ cut here ]------------ [ 69.382721][ T4941] WARNING: CPU: 0 PID: 4941 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 69.384167][ T4941] Modules linked in: [ 69.384794][ T4941] CPU: 0 PID: 4941 Comm: syz.0.20 Tainted: G W syzkaller #0 [ 69.386139][ T4941] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.387789][ T4941] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 69.389028][ T4941] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 69.389951][ T4941] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 69.390836][ T4941] sp : ffff8000226d7a80 [ 69.391483][ T4941] x29: ffff8000226d7b10 x28: 0000000000000104 x27: ffff0000e2af4c10 [ 69.392732][ T4941] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c97cf9a0 [ 69.393991][ T4941] x23: ffff0000ded0b580 x22: ffff0000ca6fc000 x21: 1fffe0001bda16bb [ 69.395290][ T4941] x20: ffff0000ded0b5d8 x19: dfff800000000000 x18: 0000000000000000 [ 69.396575][ T4941] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 69.397821][ T4941] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 69.399087][ T4941] x11: ff8080000830061c x10: 0000000000000000 x9 : 058472bb9a597a00 [ 69.400390][ T4941] x8 : 058472bb9a597a00 x7 : 0000000000000001 x6 : 0000000000000001 [ 69.401695][ T4941] x5 : ffff8000226d7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 69.402978][ T4941] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 69.404278][ T4941] Call trace: [ 69.404791][ T4941] __btrfs_unlink_inode+0x8d8/0xab8 [ 69.405691][ T4941] btrfs_unlink+0x10c/0x25c [ 69.406485][ T4941] vfs_unlink+0x2e0/0x4f4 [ 69.407149][ T4941] do_unlinkat+0x318/0x624 [ 69.407844][ T4941] __arm64_sys_unlinkat+0xe0/0xfc [ 69.408717][ T4941] invoke_syscall+0x98/0x28c [ 69.409636][ T4941] el0_svc_common+0x13c/0x258 [ 69.410552][ T4941] do_el0_svc+0x5c/0x140 [ 69.411339][ T4941] el0_svc+0x78/0x1d0 [ 69.412058][ T4941] el0t_64_sync_handler+0xcc/0xe4 [ 69.412854][ T4941] el0t_64_sync+0x1a0/0x1a4 [ 69.413625][ T4941] irq event stamp: 79028 [ 69.414276][ T4941] hardirqs last enabled at (79027): [] __up_console_sem+0xb4/0xfc [ 69.415847][ T4941] hardirqs last disabled at (79028): [] el1_dbg+0x24/0x80 [ 69.417438][ T4941] softirqs last enabled at (79008): [] handle_softirqs+0xa70/0xc14 [ 69.418929][ T4941] softirqs last disabled at (78985): [] __irq_exit_rcu+0x240/0x434 [ 69.420398][ T4941] ---[ end trace 8bb78f314527dfd0 ]--- [ 69.423598][ T4941] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 69.428407][ T4941] BTRFS info (device loop0): forced readonly [ 69.484792][ T136] device veth1_macvtap left promiscuous mode [ 69.485869][ T136] device veth0_macvtap left promiscuous mode [ 69.486875][ T136] device veth1_vlan left promiscuous mode [ 69.487780][ T136] device veth0_vlan left promiscuous mode [ 69.598498][ T4965] loop0: detected capacity change from 0 to 32768 [ 69.605740][ T1540] cfg80211: failed to load regulatory.db [ 69.613489][ T2064] ieee802154 phy0 wpan0: encryption failed: -22 [ 69.615183][ T2064] ieee802154 phy1 wpan1: encryption failed: -22 [ 69.617805][ T136] team0 (unregistering): Port device team_slave_1 removed [ 69.624674][ T136] team0 (unregistering): Port device team_slave_0 removed [ 69.628683][ T136] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 69.672966][ T136] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 69.673230][ T4965] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.21 (4965) [ 69.682906][ T4965] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 69.684356][ T4965] BTRFS info (device loop0): using free space tree [ 69.688842][ T4965] BTRFS info (device loop0): has skinny extents [ 69.805494][ T4965] BTRFS info (device loop0): enabling ssd optimizations [ 69.807961][ T136] bond0 (unregistering): Released all slaves [ 69.811285][ T4965] FAULT_INJECTION: forcing a failure. [ 69.811285][ T4965] name fail_page_alloc, interval 1, probability 0, space 0, times 1 [ 69.813309][ T4965] CPU: 0 PID: 4965 Comm: syz.0.21 Tainted: G W syzkaller #0 [ 69.814583][ T4965] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 69.816086][ T4965] Call trace: [ 69.816592][ T4965] dump_backtrace+0x0/0x458 [ 69.817292][ T4965] show_stack+0x2c/0x3c [ 69.817935][ T4965] __dump_stack+0x30/0x40 [ 69.818636][ T4965] dump_stack_lvl+0xf4/0x15c [ 69.819432][ T4965] dump_stack+0x1c/0x5c [ 69.820116][ T4965] should_fail+0x3c8/0x520 [ 69.820836][ T4965] should_fail_alloc_page+0x74/0xa8 [ 69.821675][ T4965] prepare_alloc_pages+0x160/0x460 [ 69.822468][ T4965] __alloc_pages+0x108/0x474 [ 69.823194][ T4965] alloc_pages+0x34c/0x5c0 [ 69.823853][ T4965] new_slab+0xdc/0x53c [ 69.824459][ T4965] ___slab_alloc+0x6ac/0xd84 [ 69.825169][ T4965] __slab_alloc+0x68/0xc0 [ 69.825881][ T4965] kmem_cache_alloc+0x2a8/0x3d8 [ 69.826678][ T4965] btrfs_alloc_path+0x5c/0x68 [ 69.827427][ T4965] __btrfs_unlink_inode+0x1e0/0xab8 [ 69.828312][ T4965] btrfs_unlink+0x10c/0x25c [ 69.829010][ T4965] vfs_unlink+0x2e0/0x4f4 [ 69.829718][ T4965] do_unlinkat+0x318/0x624 [ 69.830396][ T4965] __arm64_sys_unlinkat+0xe0/0xfc [ 69.831195][ T4965] invoke_syscall+0x98/0x28c [ 69.831923][ T4965] el0_svc_common+0x13c/0x258 [ 69.832655][ T4965] do_el0_svc+0x5c/0x140 [ 69.833310][ T4965] el0_svc+0x78/0x1d0 [ 69.833975][ T4965] el0t_64_sync_handler+0xcc/0xe4 [ 69.834823][ T4965] el0t_64_sync+0x1a0/0x1a4 [ 70.098660][ T4987] loop0: detected capacity change from 0 to 32768 [ 70.104511][ T4987] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.22 (4987) [ 70.108642][ T4987] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 70.110069][ T4987] BTRFS info (device loop0): using free space tree [ 70.110994][ T4987] BTRFS info (device loop0): has skinny extents [ 70.120150][ T4987] BTRFS info (device loop0): enabling ssd optimizations [ 70.124167][ T4987] FAULT_INJECTION: forcing a failure. [ 70.124167][ T4987] name failslab, interval 1, probability 0, space 0, times 0 [ 70.126324][ T4987] CPU: 0 PID: 4987 Comm: syz.0.22 Tainted: G W syzkaller #0 [ 70.127623][ T4987] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.129242][ T4987] Call trace: [ 70.129786][ T4987] dump_backtrace+0x0/0x458 [ 70.130469][ T4987] show_stack+0x2c/0x3c [ 70.131172][ T4987] __dump_stack+0x30/0x40 [ 70.131888][ T4987] dump_stack_lvl+0xf4/0x15c [ 70.132532][ T4987] dump_stack+0x1c/0x5c [ 70.133143][ T4987] should_fail+0x3c8/0x520 [ 70.133827][ T4987] __should_failslab+0xbc/0x10c [ 70.134620][ T4987] should_failslab+0x10/0x28 [ 70.135342][ T4987] slab_pre_alloc_hook+0x64/0xe8 [ 70.136086][ T4987] kmem_cache_alloc_trace+0x98/0x3f0 [ 70.136894][ T4987] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 70.137852][ T4987] __btrfs_unlink_inode+0x34c/0xab8 [ 70.138688][ T4987] btrfs_unlink+0x10c/0x25c [ 70.139360][ T4987] vfs_unlink+0x2e0/0x4f4 [ 70.140010][ T4987] do_unlinkat+0x318/0x624 [ 70.140698][ T4987] __arm64_sys_unlinkat+0xe0/0xfc [ 70.141525][ T4987] invoke_syscall+0x98/0x28c [ 70.142239][ T4987] el0_svc_common+0x13c/0x258 [ 70.142943][ T4987] do_el0_svc+0x5c/0x140 [ 70.143658][ T4987] el0_svc+0x78/0x1d0 [ 70.144316][ T4987] el0t_64_sync_handler+0xcc/0xe4 [ 70.145065][ T4987] el0t_64_sync+0x1a0/0x1a4 [ 70.147271][ T4987] ------------[ cut here ]------------ [ 70.148180][ T4987] WARNING: CPU: 0 PID: 4987 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 70.149575][ T4987] Modules linked in: [ 70.150159][ T4987] CPU: 0 PID: 4987 Comm: syz.0.22 Tainted: G W syzkaller #0 [ 70.151475][ T4987] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.152903][ T4987] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 70.154119][ T4987] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 70.154935][ T4987] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 70.155851][ T4987] sp : ffff800022a77a80 [ 70.156491][ T4987] x29: ffff800022a77b10 x28: 0000000000000104 x27: ffff0000e2af5410 [ 70.157794][ T4987] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000ec57bbb0 [ 70.159022][ T4987] x23: ffff0000ded0b8f0 x22: ffff0000cf0f8000 x21: 1fffe0001bda1729 [ 70.160371][ T4987] x20: ffff0000ded0b948 x19: dfff800000000000 x18: 0000000000000000 [ 70.161646][ T4987] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 70.163031][ T4987] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 70.164329][ T4987] x11: ff8080000830061c x10: 0000000000000000 x9 : 961225779e8d3500 [ 70.165654][ T4987] x8 : 961225779e8d3500 x7 : 0000000000000001 x6 : 0000000000000001 [ 70.166973][ T4987] x5 : ffff800022a77398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 70.168368][ T4987] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 70.169588][ T4987] Call trace: [ 70.170118][ T4987] __btrfs_unlink_inode+0x8d8/0xab8 [ 70.171013][ T4987] btrfs_unlink+0x10c/0x25c [ 70.171676][ T4987] vfs_unlink+0x2e0/0x4f4 [ 70.172340][ T4987] do_unlinkat+0x318/0x624 [ 70.173091][ T4987] __arm64_sys_unlinkat+0xe0/0xfc [ 70.173907][ T4987] invoke_syscall+0x98/0x28c [ 70.174635][ T4987] el0_svc_common+0x13c/0x258 [ 70.175324][ T4987] do_el0_svc+0x5c/0x140 [ 70.176052][ T4987] el0_svc+0x78/0x1d0 [ 70.176807][ T4987] el0t_64_sync_handler+0xcc/0xe4 [ 70.177608][ T4987] el0t_64_sync+0x1a0/0x1a4 [ 70.178481][ T4987] irq event stamp: 78988 [ 70.179208][ T4987] hardirqs last enabled at (78987): [] __up_console_sem+0xb4/0xfc [ 70.180785][ T4987] hardirqs last disabled at (78988): [] el1_dbg+0x24/0x80 [ 70.182205][ T4987] softirqs last enabled at (78968): [] handle_softirqs+0xa70/0xc14 [ 70.183779][ T4987] softirqs last disabled at (78943): [] __irq_exit_rcu+0x240/0x434 [ 70.185222][ T4987] ---[ end trace 8bb78f314527dfd1 ]--- [ 70.186689][ T4987] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 70.188239][ T4987] BTRFS info (device loop0): forced readonly [ 70.356303][ T5008] loop0: detected capacity change from 0 to 32768 [ 70.401366][ T5008] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.23 (5008) [ 70.406952][ T5008] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 70.408329][ T5008] BTRFS info (device loop0): using free space tree [ 70.409302][ T5008] BTRFS info (device loop0): has skinny extents [ 70.422058][ T5008] BTRFS info (device loop0): enabling ssd optimizations [ 70.426835][ T5008] FAULT_INJECTION: forcing a failure. [ 70.426835][ T5008] name failslab, interval 1, probability 0, space 0, times 0 [ 70.428813][ T5008] CPU: 0 PID: 5008 Comm: syz.0.23 Tainted: G W syzkaller #0 [ 70.430072][ T5008] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.431637][ T5008] Call trace: [ 70.432129][ T5008] dump_backtrace+0x0/0x458 [ 70.432833][ T5008] show_stack+0x2c/0x3c [ 70.433475][ T5008] __dump_stack+0x30/0x40 [ 70.434240][ T5008] dump_stack_lvl+0xf4/0x15c [ 70.435060][ T5008] dump_stack+0x1c/0x5c [ 70.435811][ T5008] should_fail+0x3c8/0x520 [ 70.436574][ T5008] __should_failslab+0xbc/0x10c [ 70.437409][ T5008] should_failslab+0x10/0x28 [ 70.438226][ T5008] slab_pre_alloc_hook+0x64/0xe8 [ 70.439022][ T5008] kmem_cache_alloc_trace+0x98/0x3f0 [ 70.439923][ T5008] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 70.440976][ T5008] __btrfs_unlink_inode+0x34c/0xab8 [ 70.441781][ T5008] btrfs_unlink+0x10c/0x25c [ 70.442591][ T5008] vfs_unlink+0x2e0/0x4f4 [ 70.443344][ T5008] do_unlinkat+0x318/0x624 [ 70.444095][ T5008] __arm64_sys_unlinkat+0xe0/0xfc [ 70.444885][ T5008] invoke_syscall+0x98/0x28c [ 70.445639][ T5008] el0_svc_common+0x13c/0x258 [ 70.446415][ T5008] do_el0_svc+0x5c/0x140 [ 70.447089][ T5008] el0_svc+0x78/0x1d0 [ 70.447714][ T5008] el0t_64_sync_handler+0xcc/0xe4 [ 70.448595][ T5008] el0t_64_sync+0x1a0/0x1a4 [ 70.451938][ T5008] ------------[ cut here ]------------ [ 70.452802][ T5008] WARNING: CPU: 0 PID: 5008 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 70.454257][ T5008] Modules linked in: [ 70.454895][ T5008] CPU: 0 PID: 5008 Comm: syz.0.23 Tainted: G W syzkaller #0 [ 70.456298][ T5008] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.458153][ T5008] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 70.459467][ T5008] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 70.460395][ T5008] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 70.461500][ T5008] sp : ffff800022a77a80 [ 70.462269][ T5008] x29: ffff800022a77b10 x28: 0000000000000104 x27: ffff0000e2af5810 [ 70.463750][ T5008] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000cad14d10 [ 70.465224][ T5008] x23: ffff0000ded0ba50 x22: ffff0000cec98000 x21: 1fffe0001bda1755 [ 70.466686][ T5008] x20: ffff0000ded0baa8 x19: dfff800000000000 x18: 0000000000000000 [ 70.468040][ T5008] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 70.469320][ T5008] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 70.470564][ T5008] x11: ff8080000830061c x10: 0000000000000000 x9 : ad6f1e573f652800 [ 70.471938][ T5008] x8 : ad6f1e573f652800 x7 : 0000000000000001 x6 : 0000000000000001 [ 70.473165][ T5008] x5 : ffff800022a77398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 70.474431][ T5008] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 70.475720][ T5008] Call trace: [ 70.476240][ T5008] __btrfs_unlink_inode+0x8d8/0xab8 [ 70.477088][ T5008] btrfs_unlink+0x10c/0x25c [ 70.477837][ T5008] vfs_unlink+0x2e0/0x4f4 [ 70.478525][ T5008] do_unlinkat+0x318/0x624 [ 70.479299][ T5008] __arm64_sys_unlinkat+0xe0/0xfc [ 70.480140][ T5008] invoke_syscall+0x98/0x28c [ 70.480886][ T5008] el0_svc_common+0x13c/0x258 [ 70.481680][ T5008] do_el0_svc+0x5c/0x140 [ 70.482358][ T5008] el0_svc+0x78/0x1d0 [ 70.483078][ T5008] el0t_64_sync_handler+0xcc/0xe4 [ 70.483888][ T5008] el0t_64_sync+0x1a0/0x1a4 [ 70.484666][ T5008] irq event stamp: 79060 [ 70.485368][ T5008] hardirqs last enabled at (79059): [] __up_console_sem+0xb4/0xfc [ 70.486814][ T5008] hardirqs last disabled at (79060): [] el1_dbg+0x24/0x80 [ 70.488407][ T5008] softirqs last enabled at (79040): [] handle_softirqs+0xa70/0xc14 [ 70.489929][ T5008] softirqs last disabled at (79017): [] __irq_exit_rcu+0x240/0x434 [ 70.491367][ T5008] ---[ end trace 8bb78f314527dfd2 ]--- [ 70.496551][ T5008] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 70.498111][ T5008] BTRFS info (device loop0): forced readonly [ 70.678846][ T5030] loop0: detected capacity change from 0 to 32768 [ 70.715837][ T5030] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.24 (5030) [ 70.723154][ T5030] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 70.724585][ T4158] Bluetooth: hci0: command 0x041b tx timeout [ 70.725083][ T5030] BTRFS info (device loop0): using free space tree [ 70.726769][ T5030] BTRFS info (device loop0): has skinny extents [ 70.739115][ T5030] BTRFS info (device loop0): enabling ssd optimizations [ 70.743017][ T5030] FAULT_INJECTION: forcing a failure. [ 70.743017][ T5030] name failslab, interval 1, probability 0, space 0, times 0 [ 70.745680][ T5030] CPU: 0 PID: 5030 Comm: syz.0.24 Tainted: G W syzkaller #0 [ 70.746902][ T5030] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.748399][ T5030] Call trace: [ 70.748920][ T5030] dump_backtrace+0x0/0x458 [ 70.749671][ T5030] show_stack+0x2c/0x3c [ 70.750371][ T5030] __dump_stack+0x30/0x40 [ 70.751103][ T5030] dump_stack_lvl+0xf4/0x15c [ 70.751816][ T5030] dump_stack+0x1c/0x5c [ 70.752542][ T5030] should_fail+0x3c8/0x520 [ 70.753264][ T5030] __should_failslab+0xbc/0x10c [ 70.754015][ T5030] should_failslab+0x10/0x28 [ 70.754719][ T5030] slab_pre_alloc_hook+0x64/0xe8 [ 70.755495][ T5030] kmem_cache_alloc_trace+0x98/0x3f0 [ 70.756300][ T5030] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 70.757252][ T5030] __btrfs_unlink_inode+0x34c/0xab8 [ 70.758075][ T5030] btrfs_unlink+0x10c/0x25c [ 70.758734][ T5030] vfs_unlink+0x2e0/0x4f4 [ 70.759405][ T5030] do_unlinkat+0x318/0x624 [ 70.760101][ T5030] __arm64_sys_unlinkat+0xe0/0xfc [ 70.760886][ T5030] invoke_syscall+0x98/0x28c [ 70.761618][ T5030] el0_svc_common+0x13c/0x258 [ 70.762342][ T5030] do_el0_svc+0x5c/0x140 [ 70.762973][ T5030] el0_svc+0x78/0x1d0 [ 70.763620][ T5030] el0t_64_sync_handler+0xcc/0xe4 [ 70.764414][ T5030] el0t_64_sync+0x1a0/0x1a4 [ 70.766698][ T5030] ------------[ cut here ]------------ [ 70.767622][ T5030] WARNING: CPU: 0 PID: 5030 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 70.769074][ T5030] Modules linked in: [ 70.769646][ T5030] CPU: 0 PID: 5030 Comm: syz.0.24 Tainted: G W syzkaller #0 [ 70.770922][ T5030] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 70.772409][ T5030] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 70.773564][ T5030] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 70.774386][ T5030] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 70.775260][ T5030] sp : ffff800022f67a80 [ 70.775904][ T5030] x29: ffff800022f67b10 x28: 0000000000000104 x27: ffff0000e2af5c10 [ 70.777131][ T5030] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000ebfa3e70 [ 70.778411][ T5030] x23: ffff0000ded0bbb0 x22: ffff0000d9b7c000 x21: 1fffe0001bda1781 [ 70.779727][ T5030] x20: ffff0000ded0bc08 x19: dfff800000000000 x18: 0000000000000000 [ 70.780992][ T5030] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 70.782209][ T5030] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 70.783526][ T5030] x11: ff8080000830061c x10: 0000000000000000 x9 : c085d0a36e4f5700 [ 70.784835][ T5030] x8 : c085d0a36e4f5700 x7 : 0000000000000001 x6 : 0000000000000001 [ 70.786202][ T5030] x5 : ffff800022f67398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 70.787486][ T5030] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 70.788751][ T5030] Call trace: [ 70.789275][ T5030] __btrfs_unlink_inode+0x8d8/0xab8 [ 70.790116][ T5030] btrfs_unlink+0x10c/0x25c [ 70.790869][ T5030] vfs_unlink+0x2e0/0x4f4 [ 70.791539][ T5030] do_unlinkat+0x318/0x624 [ 70.792368][ T5030] __arm64_sys_unlinkat+0xe0/0xfc [ 70.793228][ T5030] invoke_syscall+0x98/0x28c [ 70.793931][ T5030] el0_svc_common+0x13c/0x258 [ 70.794722][ T5030] do_el0_svc+0x5c/0x140 [ 70.795436][ T5030] el0_svc+0x78/0x1d0 [ 70.796124][ T5030] el0t_64_sync_handler+0xcc/0xe4 [ 70.796941][ T5030] el0t_64_sync+0x1a0/0x1a4 [ 70.797688][ T5030] irq event stamp: 78982 [ 70.798394][ T5030] hardirqs last enabled at (78981): [] __up_console_sem+0xb4/0xfc [ 70.799864][ T5030] hardirqs last disabled at (78982): [] el1_dbg+0x24/0x80 [ 70.801230][ T5030] softirqs last enabled at (78962): [] handle_softirqs+0xa70/0xc14 [ 70.802819][ T5030] softirqs last disabled at (78939): [] __irq_exit_rcu+0x240/0x434 [ 70.804324][ T5030] ---[ end trace 8bb78f314527dfd3 ]--- [ 70.805481][ T5030] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 70.807037][ T5030] BTRFS info (device loop0): forced readonly [ 71.049919][ T5052] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.25 (5052) [ 71.054277][ T5052] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 71.056429][ T5052] BTRFS info (device loop0): using free space tree [ 71.057695][ T5052] BTRFS info (device loop0): has skinny extents [ 71.080559][ T5052] BTRFS info (device loop0): enabling ssd optimizations [ 71.085573][ T5052] FAULT_INJECTION: forcing a failure. [ 71.085573][ T5052] name failslab, interval 1, probability 0, space 0, times 0 [ 71.087608][ T5052] CPU: 1 PID: 5052 Comm: syz.0.25 Tainted: G W syzkaller #0 [ 71.088927][ T5052] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.090555][ T5052] Call trace: [ 71.091064][ T5052] dump_backtrace+0x0/0x458 [ 71.091781][ T5052] show_stack+0x2c/0x3c [ 71.092424][ T5052] __dump_stack+0x30/0x40 [ 71.093239][ T5052] dump_stack_lvl+0xf4/0x15c [ 71.094001][ T5052] dump_stack+0x1c/0x5c [ 71.094666][ T5052] should_fail+0x3c8/0x520 [ 71.095418][ T5052] __should_failslab+0xbc/0x10c [ 71.096244][ T5052] should_failslab+0x10/0x28 [ 71.097040][ T5052] slab_pre_alloc_hook+0x64/0xe8 [ 71.097867][ T5052] kmem_cache_alloc+0x94/0x3d8 [ 71.098686][ T5052] start_transaction+0x530/0x1438 [ 71.099553][ T5052] btrfs_start_transaction_fallback_global_rsv+0x34/0x44 [ 71.100693][ T5052] btrfs_unlink+0x74/0x25c [ 71.101358][ T5052] vfs_unlink+0x2e0/0x4f4 [ 71.102038][ T5052] do_unlinkat+0x318/0x624 [ 71.102755][ T5052] __arm64_sys_unlinkat+0xe0/0xfc [ 71.103501][ T5052] invoke_syscall+0x98/0x28c [ 71.104274][ T5052] el0_svc_common+0x13c/0x258 [ 71.105076][ T5052] do_el0_svc+0x5c/0x140 [ 71.105762][ T5052] el0_svc+0x78/0x1d0 [ 71.106404][ T5052] el0t_64_sync_handler+0xcc/0xe4 [ 71.107219][ T5052] el0t_64_sync+0x1a0/0x1a4 [ 71.296587][ T5074] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.26 (5074) [ 71.336273][ T5074] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 71.337687][ T5074] BTRFS info (device loop0): using free space tree [ 71.338702][ T5074] BTRFS info (device loop0): has skinny extents [ 71.369286][ T5074] BTRFS info (device loop0): enabling ssd optimizations [ 71.373357][ T5074] FAULT_INJECTION: forcing a failure. [ 71.373357][ T5074] name failslab, interval 1, probability 0, space 0, times 0 [ 71.377473][ T5074] CPU: 1 PID: 5074 Comm: syz.0.26 Tainted: G W syzkaller #0 [ 71.378895][ T5074] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.380378][ T5074] Call trace: [ 71.380880][ T5074] dump_backtrace+0x0/0x458 [ 71.381633][ T5074] show_stack+0x2c/0x3c [ 71.382284][ T5074] __dump_stack+0x30/0x40 [ 71.383031][ T5074] dump_stack_lvl+0xf4/0x15c [ 71.383789][ T5074] dump_stack+0x1c/0x5c [ 71.384425][ T5074] should_fail+0x3c8/0x520 [ 71.385206][ T5074] __should_failslab+0xbc/0x10c [ 71.385973][ T5074] should_failslab+0x10/0x28 [ 71.386792][ T5074] slab_pre_alloc_hook+0x64/0xe8 [ 71.387644][ T5074] kmem_cache_alloc+0x94/0x3d8 [ 71.388547][ T5074] btrfs_alloc_path+0x5c/0x68 [ 71.389407][ T5074] __btrfs_unlink_inode+0x1e0/0xab8 [ 71.390211][ T5074] btrfs_unlink+0x10c/0x25c [ 71.390919][ T5074] vfs_unlink+0x2e0/0x4f4 [ 71.391688][ T5074] do_unlinkat+0x318/0x624 [ 71.392458][ T5074] __arm64_sys_unlinkat+0xe0/0xfc [ 71.393250][ T5074] invoke_syscall+0x98/0x28c [ 71.394044][ T5074] el0_svc_common+0x13c/0x258 [ 71.394907][ T5074] do_el0_svc+0x5c/0x140 [ 71.395684][ T5074] el0_svc+0x78/0x1d0 [ 71.396355][ T5074] el0t_64_sync_handler+0xcc/0xe4 [ 71.397218][ T5074] el0t_64_sync+0x1a0/0x1a4 [ 71.588200][ T5097] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.27 (5097) [ 71.591043][ T5097] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 71.592842][ T5097] BTRFS info (device loop0): using free space tree [ 71.594262][ T5097] BTRFS info (device loop0): has skinny extents [ 71.613909][ T5097] BTRFS info (device loop0): enabling ssd optimizations [ 71.618494][ T5097] FAULT_INJECTION: forcing a failure. [ 71.618494][ T5097] name failslab, interval 1, probability 0, space 0, times 0 [ 71.620407][ T5097] CPU: 0 PID: 5097 Comm: syz.0.27 Tainted: G W syzkaller #0 [ 71.621736][ T5097] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.623232][ T5097] Call trace: [ 71.623696][ T5097] dump_backtrace+0x0/0x458 [ 71.624366][ T5097] show_stack+0x2c/0x3c [ 71.624979][ T5097] __dump_stack+0x30/0x40 [ 71.625727][ T5097] dump_stack_lvl+0xf4/0x15c [ 71.626382][ T5097] dump_stack+0x1c/0x5c [ 71.626964][ T5097] should_fail+0x3c8/0x520 [ 71.627683][ T5097] __should_failslab+0xbc/0x10c [ 71.628474][ T5097] should_failslab+0x10/0x28 [ 71.629200][ T5097] slab_pre_alloc_hook+0x64/0xe8 [ 71.629960][ T5097] kmem_cache_alloc_trace+0x98/0x3f0 [ 71.630828][ T5097] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 71.631793][ T5097] __btrfs_unlink_inode+0x34c/0xab8 [ 71.632582][ T5097] btrfs_unlink+0x10c/0x25c [ 71.633267][ T5097] vfs_unlink+0x2e0/0x4f4 [ 71.633946][ T5097] do_unlinkat+0x318/0x624 [ 71.634692][ T5097] __arm64_sys_unlinkat+0xe0/0xfc [ 71.635526][ T5097] invoke_syscall+0x98/0x28c [ 71.636287][ T5097] el0_svc_common+0x13c/0x258 [ 71.637043][ T5097] do_el0_svc+0x5c/0x140 [ 71.637759][ T5097] el0_svc+0x78/0x1d0 [ 71.638306][ T5097] el0t_64_sync_handler+0xcc/0xe4 [ 71.639105][ T5097] el0t_64_sync+0x1a0/0x1a4 [ 71.640335][ T5097] ------------[ cut here ]------------ [ 71.641299][ T5097] WARNING: CPU: 0 PID: 5097 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 71.642711][ T5097] Modules linked in: [ 71.643279][ T5097] CPU: 0 PID: 5097 Comm: syz.0.27 Tainted: G W syzkaller #0 [ 71.644530][ T5097] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.646181][ T5097] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 71.647554][ T5097] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 71.648442][ T5097] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 71.649322][ T5097] sp : ffff8000232d7a80 [ 71.649994][ T5097] x29: ffff8000232d7b10 x28: 0000000000000104 x27: ffff0000e2af6010 [ 71.651261][ T5097] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000e7204160 [ 71.652569][ T5097] x23: ffff0000ded0bdc0 x22: ffff0000d82e6000 x21: 1fffe0001bda17c3 [ 71.653801][ T5097] x20: ffff0000ded0be18 x19: dfff800000000000 x18: 0000000000000000 [ 71.655005][ T5097] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 71.656313][ T5097] x14: 0000000000000001 x13: 1fffe000341d02d7 x12: 0000000000000000 [ 71.657661][ T5097] x11: ff8080000830061c x10: 0000000000000000 x9 : 8739c9f213c66500 [ 71.659009][ T5097] x8 : 8739c9f213c66500 x7 : 0000000000000001 x6 : 0000000000000001 [ 71.660220][ T5097] x5 : ffff8000232d7398 x4 : ffff80001446f500 x3 : ffff80000a79dba8 [ 71.661508][ T5097] x2 : ffff0001a0e75d50 x1 : 0000000100000000 x0 : 0000000000000026 [ 71.662715][ T5097] Call trace: [ 71.663252][ T5097] __btrfs_unlink_inode+0x8d8/0xab8 [ 71.664101][ T5097] btrfs_unlink+0x10c/0x25c [ 71.664774][ T5097] vfs_unlink+0x2e0/0x4f4 [ 71.665436][ T5097] do_unlinkat+0x318/0x624 [ 71.666133][ T5097] __arm64_sys_unlinkat+0xe0/0xfc [ 71.666937][ T5097] invoke_syscall+0x98/0x28c [ 71.667701][ T5097] el0_svc_common+0x13c/0x258 [ 71.668459][ T5097] do_el0_svc+0x5c/0x140 [ 71.669172][ T5097] el0_svc+0x78/0x1d0 [ 71.669824][ T5097] el0t_64_sync_handler+0xcc/0xe4 [ 71.670582][ T5097] el0t_64_sync+0x1a0/0x1a4 [ 71.671221][ T5097] irq event stamp: 78930 [ 71.671880][ T5097] hardirqs last enabled at (78929): [] __up_console_sem+0xb4/0xfc [ 71.673353][ T5097] hardirqs last disabled at (78930): [] el1_dbg+0x24/0x80 [ 71.674689][ T5097] softirqs last enabled at (78910): [] handle_softirqs+0xa70/0xc14 [ 71.676150][ T5097] softirqs last disabled at (78871): [] __irq_exit_rcu+0x240/0x434 [ 71.677574][ T5097] ---[ end trace 8bb78f314527dfd4 ]--- [ 71.681786][ T5097] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 71.683231][ T5097] BTRFS info (device loop0): forced readonly 1970/01/01 00:01:11 executed programs: 15 [ 71.851325][ T5120] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.28 (5120) [ 71.856471][ T5120] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 71.857941][ T5120] BTRFS info (device loop0): using free space tree [ 71.858933][ T5120] BTRFS info (device loop0): has skinny extents [ 71.866804][ T5120] BTRFS info (device loop0): enabling ssd optimizations [ 71.870691][ T5120] FAULT_INJECTION: forcing a failure. [ 71.870691][ T5120] name failslab, interval 1, probability 0, space 0, times 0 [ 71.872666][ T5120] CPU: 0 PID: 5120 Comm: syz.0.28 Tainted: G W syzkaller #0 [ 71.873955][ T5120] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.875702][ T5120] Call trace: [ 71.876274][ T5120] dump_backtrace+0x0/0x458 [ 71.877030][ T5120] show_stack+0x2c/0x3c [ 71.877721][ T5120] __dump_stack+0x30/0x40 [ 71.878445][ T5120] dump_stack_lvl+0xf4/0x15c [ 71.879154][ T5120] dump_stack+0x1c/0x5c [ 71.879822][ T5120] should_fail+0x3c8/0x520 [ 71.880548][ T5120] __should_failslab+0xbc/0x10c [ 71.881420][ T5120] should_failslab+0x10/0x28 [ 71.882196][ T5120] slab_pre_alloc_hook+0x64/0xe8 [ 71.883054][ T5120] kmem_cache_alloc_trace+0x98/0x3f0 [ 71.883943][ T5120] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 71.884987][ T5120] __btrfs_unlink_inode+0x34c/0xab8 [ 71.885877][ T5120] btrfs_unlink+0x10c/0x25c [ 71.886618][ T5120] vfs_unlink+0x2e0/0x4f4 [ 71.887372][ T5120] do_unlinkat+0x318/0x624 [ 71.888096][ T5120] __arm64_sys_unlinkat+0xe0/0xfc [ 71.888911][ T5120] invoke_syscall+0x98/0x28c [ 71.889636][ T5120] el0_svc_common+0x13c/0x258 [ 71.890405][ T5120] do_el0_svc+0x5c/0x140 [ 71.891137][ T5120] el0_svc+0x78/0x1d0 [ 71.891779][ T5120] el0t_64_sync_handler+0xcc/0xe4 [ 71.892589][ T5120] el0t_64_sync+0x1a0/0x1a4 [ 71.893890][ T5120] ------------[ cut here ]------------ [ 71.897508][ T5120] WARNING: CPU: 0 PID: 5120 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 71.898989][ T5120] Modules linked in: [ 71.899627][ T5120] CPU: 0 PID: 5120 Comm: syz.0.28 Tainted: G W syzkaller #0 [ 71.900973][ T5120] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 71.902491][ T5120] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 71.903641][ T5120] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 71.904511][ T5120] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 71.905444][ T5120] sp : ffff8000232e7a80 [ 71.906124][ T5120] x29: ffff8000232e7b10 x28: 0000000000000104 x27: ffff0000e2af6410 [ 71.907406][ T5120] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d9027210 [ 71.908722][ T5120] x23: ffff0000ded0bf20 x22: ffff0000de02a000 x21: 1fffe0001bda17ef [ 71.909911][ T5120] x20: ffff0000ded0bf78 x19: dfff800000000000 x18: 0000000000000000 [ 71.911083][ T5120] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 71.912372][ T5120] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 71.913742][ T5120] x11: ff8080000830061c x10: 0000000000000000 x9 : fcad86ec3bf80500 [ 71.915047][ T5120] x8 : fcad86ec3bf80500 x7 : 0000000000000001 x6 : 0000000000000001 [ 71.916444][ T5120] x5 : ffff8000232e7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 71.917715][ T5120] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 71.918939][ T5120] Call trace: [ 71.919534][ T5120] __btrfs_unlink_inode+0x8d8/0xab8 [ 71.920367][ T5120] btrfs_unlink+0x10c/0x25c [ 71.921142][ T5120] vfs_unlink+0x2e0/0x4f4 [ 71.921900][ T5120] do_unlinkat+0x318/0x624 [ 71.922648][ T5120] __arm64_sys_unlinkat+0xe0/0xfc [ 71.923556][ T5120] invoke_syscall+0x98/0x28c [ 71.924419][ T5120] el0_svc_common+0x13c/0x258 [ 71.925164][ T5120] do_el0_svc+0x5c/0x140 [ 71.925789][ T5120] el0_svc+0x78/0x1d0 [ 71.926470][ T5120] el0t_64_sync_handler+0xcc/0xe4 [ 71.927306][ T5120] el0t_64_sync+0x1a0/0x1a4 [ 71.928033][ T5120] irq event stamp: 79724 [ 71.928723][ T5120] hardirqs last enabled at (79723): [] __up_console_sem+0xb4/0xfc [ 71.930263][ T5120] hardirqs last disabled at (79724): [] el1_dbg+0x24/0x80 [ 71.931628][ T5120] softirqs last enabled at (79712): [] handle_softirqs+0xa70/0xc14 [ 71.933245][ T5120] softirqs last disabled at (79667): [] __irq_exit_rcu+0x240/0x434 [ 71.934985][ T5120] ---[ end trace 8bb78f314527dfd5 ]--- [ 71.936263][ T5120] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 71.937805][ T5120] BTRFS info (device loop0): forced readonly [ 72.165797][ T5141] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.29 (5141) [ 72.169177][ T5141] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 72.170651][ T5141] BTRFS info (device loop0): using free space tree [ 72.171709][ T5141] BTRFS info (device loop0): has skinny extents [ 72.183387][ T5141] BTRFS info (device loop0): enabling ssd optimizations [ 72.194239][ T5141] FAULT_INJECTION: forcing a failure. [ 72.194239][ T5141] name failslab, interval 1, probability 0, space 0, times 0 [ 72.196310][ T5141] CPU: 0 PID: 5141 Comm: syz.0.29 Tainted: G W syzkaller #0 [ 72.197571][ T5141] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.199134][ T5141] Call trace: [ 72.199617][ T5141] dump_backtrace+0x0/0x458 [ 72.200301][ T5141] show_stack+0x2c/0x3c [ 72.200887][ T5141] __dump_stack+0x30/0x40 [ 72.201530][ T5141] dump_stack_lvl+0xf4/0x15c [ 72.202177][ T5141] dump_stack+0x1c/0x5c [ 72.202811][ T5141] should_fail+0x3c8/0x520 [ 72.203515][ T5141] __should_failslab+0xbc/0x10c [ 72.204246][ T5141] should_failslab+0x10/0x28 [ 72.204947][ T5141] slab_pre_alloc_hook+0x64/0xe8 [ 72.205708][ T5141] kmem_cache_alloc_trace+0x98/0x3f0 [ 72.206556][ T5141] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 72.207484][ T5141] __btrfs_unlink_inode+0x34c/0xab8 [ 72.208365][ T5141] btrfs_unlink+0x10c/0x25c [ 72.209106][ T5141] vfs_unlink+0x2e0/0x4f4 [ 72.209757][ T5141] do_unlinkat+0x318/0x624 [ 72.210482][ T5141] __arm64_sys_unlinkat+0xe0/0xfc [ 72.211262][ T5141] invoke_syscall+0x98/0x28c [ 72.212021][ T5141] el0_svc_common+0x13c/0x258 [ 72.212744][ T5141] do_el0_svc+0x5c/0x140 [ 72.213456][ T5141] el0_svc+0x78/0x1d0 [ 72.214114][ T5141] el0t_64_sync_handler+0xcc/0xe4 [ 72.214901][ T5141] el0t_64_sync+0x1a0/0x1a4 [ 72.216199][ T5141] ------------[ cut here ]------------ [ 72.217211][ T5141] WARNING: CPU: 0 PID: 5141 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 72.218685][ T5141] Modules linked in: [ 72.219268][ T5141] CPU: 0 PID: 5141 Comm: syz.0.29 Tainted: G W syzkaller #0 [ 72.220587][ T5141] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.222039][ T5141] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 72.223253][ T5141] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 72.224061][ T5141] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 72.224905][ T5141] sp : ffff80001f827a80 [ 72.225585][ T5141] x29: ffff80001f827b10 x28: 0000000000000104 x27: ffff0000e2af6810 [ 72.226903][ T5141] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c159a420 [ 72.228215][ T5141] x23: ffff0000ded0b160 x22: ffff0000da09c000 x21: 1fffe0001bda1637 [ 72.229511][ T5141] x20: ffff0000ded0b1b8 x19: dfff800000000000 x18: 0000000000000000 [ 72.230796][ T5141] x17: 0000000000000000 x16: ffff8000082c63e0 x15: 0000000000000000 [ 72.232108][ T5141] x14: 0000000000000001 x13: 1ffff00003f04e70 x12: 0000000000000000 [ 72.233466][ T5141] x11: ff8080000830061c x10: 0000000000000000 x9 : 89b6d83af2f1f100 [ 72.234774][ T5141] x8 : 89b6d83af2f1f100 x7 : 0000000000000001 x6 : 0000000000000001 [ 72.235988][ T5141] x5 : ffff80001f827398 x4 : ffff80001446f500 x3 : ffff800008307f44 [ 72.237271][ T5141] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 72.238545][ T5141] Call trace: [ 72.239033][ T5141] __btrfs_unlink_inode+0x8d8/0xab8 [ 72.239784][ T5141] btrfs_unlink+0x10c/0x25c [ 72.240539][ T5141] vfs_unlink+0x2e0/0x4f4 [ 72.241187][ T5141] do_unlinkat+0x318/0x624 [ 72.241863][ T5141] __arm64_sys_unlinkat+0xe0/0xfc [ 72.242712][ T5141] invoke_syscall+0x98/0x28c [ 72.243416][ T5141] el0_svc_common+0x13c/0x258 [ 72.244152][ T5141] do_el0_svc+0x5c/0x140 [ 72.244811][ T5141] el0_svc+0x78/0x1d0 [ 72.245452][ T5141] el0t_64_sync_handler+0xcc/0xe4 [ 72.246276][ T5141] el0t_64_sync+0x1a0/0x1a4 [ 72.246974][ T5141] irq event stamp: 78876 [ 72.247661][ T5141] hardirqs last enabled at (78875): [] __up_console_sem+0xb4/0xfc [ 72.249153][ T5141] hardirqs last disabled at (78876): [] el1_dbg+0x24/0x80 [ 72.250509][ T5141] softirqs last enabled at (78856): [] handle_softirqs+0xa70/0xc14 [ 72.251981][ T5141] softirqs last disabled at (78823): [] __irq_exit_rcu+0x240/0x434 [ 72.253472][ T5141] ---[ end trace 8bb78f314527dfd6 ]--- [ 72.255022][ T5141] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 72.256574][ T5141] BTRFS info (device loop0): forced readonly [ 72.425641][ T5163] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.30 (5163) [ 72.428897][ T5163] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 72.430360][ T5163] BTRFS info (device loop0): using free space tree [ 72.431346][ T5163] BTRFS info (device loop0): has skinny extents [ 72.446546][ T5163] BTRFS info (device loop0): enabling ssd optimizations [ 72.458059][ T5163] FAULT_INJECTION: forcing a failure. [ 72.458059][ T5163] name failslab, interval 1, probability 0, space 0, times 0 [ 72.459999][ T5163] CPU: 0 PID: 5163 Comm: syz.0.30 Tainted: G W syzkaller #0 [ 72.461285][ T5163] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.462900][ T5163] Call trace: [ 72.463439][ T5163] dump_backtrace+0x0/0x458 [ 72.464151][ T5163] show_stack+0x2c/0x3c [ 72.464920][ T5163] __dump_stack+0x30/0x40 [ 72.465657][ T5163] dump_stack_lvl+0xf4/0x15c [ 72.466397][ T5163] dump_stack+0x1c/0x5c [ 72.467087][ T5163] should_fail+0x3c8/0x520 [ 72.467821][ T5163] __should_failslab+0xbc/0x10c [ 72.468646][ T5163] should_failslab+0x10/0x28 [ 72.469329][ T5163] slab_pre_alloc_hook+0x64/0xe8 [ 72.470188][ T5163] kmem_cache_alloc+0x94/0x3d8 [ 72.470909][ T5163] btrfs_alloc_path+0x5c/0x68 [ 72.471672][ T5163] __btrfs_unlink_inode+0x1e0/0xab8 [ 72.472535][ T5163] btrfs_unlink+0x10c/0x25c [ 72.473265][ T5163] vfs_unlink+0x2e0/0x4f4 [ 72.473929][ T5163] do_unlinkat+0x318/0x624 [ 72.474696][ T5163] __arm64_sys_unlinkat+0xe0/0xfc [ 72.475497][ T5163] invoke_syscall+0x98/0x28c [ 72.476156][ T5163] el0_svc_common+0x13c/0x258 [ 72.476874][ T5163] do_el0_svc+0x5c/0x140 [ 72.477500][ T5163] el0_svc+0x78/0x1d0 [ 72.478095][ T5163] el0t_64_sync_handler+0xcc/0xe4 [ 72.478916][ T5163] el0t_64_sync+0x1a0/0x1a4 [ 72.645621][ T5185] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.31 (5185) [ 72.649084][ T5185] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 72.650533][ T5185] BTRFS info (device loop0): using free space tree [ 72.651566][ T5185] BTRFS info (device loop0): has skinny extents [ 72.659081][ T5185] BTRFS info (device loop0): enabling ssd optimizations [ 72.663319][ T5185] FAULT_INJECTION: forcing a failure. [ 72.663319][ T5185] name failslab, interval 1, probability 0, space 0, times 0 [ 72.665661][ T5185] CPU: 0 PID: 5185 Comm: syz.0.31 Tainted: G W syzkaller #0 [ 72.666876][ T5185] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.668556][ T5185] Call trace: [ 72.669100][ T5185] dump_backtrace+0x0/0x458 [ 72.669916][ T5185] show_stack+0x2c/0x3c [ 72.670655][ T5185] __dump_stack+0x30/0x40 [ 72.671432][ T5185] dump_stack_lvl+0xf4/0x15c [ 72.672203][ T5185] dump_stack+0x1c/0x5c [ 72.672894][ T5185] should_fail+0x3c8/0x520 [ 72.673604][ T5185] __should_failslab+0xbc/0x10c [ 72.674417][ T5185] should_failslab+0x10/0x28 [ 72.675193][ T5185] slab_pre_alloc_hook+0x64/0xe8 [ 72.675958][ T5185] kmem_cache_alloc+0x94/0x3d8 [ 72.676754][ T5185] btrfs_alloc_path+0x5c/0x68 [ 72.677583][ T5185] __btrfs_unlink_inode+0x1e0/0xab8 [ 72.678420][ T5185] btrfs_unlink+0x10c/0x25c [ 72.679199][ T5185] vfs_unlink+0x2e0/0x4f4 [ 72.679894][ T5185] do_unlinkat+0x318/0x624 [ 72.680654][ T5185] __arm64_sys_unlinkat+0xe0/0xfc [ 72.681544][ T5185] invoke_syscall+0x98/0x28c [ 72.682317][ T5185] el0_svc_common+0x13c/0x258 [ 72.683080][ T5185] do_el0_svc+0x5c/0x140 [ 72.683762][ T5185] el0_svc+0x78/0x1d0 [ 72.684425][ T5185] el0t_64_sync_handler+0xcc/0xe4 [ 72.685236][ T5185] el0t_64_sync+0x1a0/0x1a4 [ 72.737666][ T4638] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 10 /dev/loop0 scanned by udevd (4638) [ 72.804661][ T4149] Bluetooth: hci0: command 0x040f tx timeout [ 72.837310][ T5206] set_capacity_and_notify: 7 callbacks suppressed [ 72.837320][ T5206] loop0: detected capacity change from 0 to 32768 [ 72.844076][ T5206] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 72.846186][ T5206] BTRFS info (device loop0): using free space tree [ 72.847241][ T5206] BTRFS info (device loop0): has skinny extents [ 72.873715][ T5206] BTRFS info (device loop0): enabling ssd optimizations [ 72.879195][ T5206] FAULT_INJECTION: forcing a failure. [ 72.879195][ T5206] name failslab, interval 1, probability 0, space 0, times 0 [ 72.881428][ T5206] CPU: 1 PID: 5206 Comm: syz.0.32 Tainted: G W syzkaller #0 [ 72.882696][ T5206] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.884265][ T5206] Call trace: [ 72.884820][ T5206] dump_backtrace+0x0/0x458 [ 72.885627][ T5206] show_stack+0x2c/0x3c [ 72.886384][ T5206] __dump_stack+0x30/0x40 [ 72.887113][ T5206] dump_stack_lvl+0xf4/0x15c [ 72.887896][ T5206] dump_stack+0x1c/0x5c [ 72.888582][ T5206] should_fail+0x3c8/0x520 [ 72.889334][ T5206] __should_failslab+0xbc/0x10c [ 72.890080][ T5206] should_failslab+0x10/0x28 [ 72.890777][ T5206] slab_pre_alloc_hook+0x64/0xe8 [ 72.891586][ T5206] kmem_cache_alloc_trace+0x98/0x3f0 [ 72.892505][ T5206] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 72.893579][ T5206] __btrfs_unlink_inode+0x34c/0xab8 [ 72.894502][ T5206] btrfs_unlink+0x10c/0x25c [ 72.895238][ T5206] vfs_unlink+0x2e0/0x4f4 [ 72.896032][ T5206] do_unlinkat+0x318/0x624 [ 72.896862][ T5206] __arm64_sys_unlinkat+0xe0/0xfc [ 72.897763][ T5206] invoke_syscall+0x98/0x28c [ 72.898613][ T5206] el0_svc_common+0x13c/0x258 [ 72.899412][ T5206] do_el0_svc+0x5c/0x140 [ 72.900138][ T5206] el0_svc+0x78/0x1d0 [ 72.900832][ T5206] el0t_64_sync_handler+0xcc/0xe4 [ 72.901679][ T5206] el0t_64_sync+0x1a0/0x1a4 [ 72.905279][ T5206] ------------[ cut here ]------------ [ 72.906353][ T5206] WARNING: CPU: 1 PID: 5206 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 72.908047][ T5206] Modules linked in: [ 72.908667][ T5206] CPU: 1 PID: 5206 Comm: syz.0.32 Tainted: G W syzkaller #0 [ 72.910024][ T5206] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 72.911746][ T5206] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 72.913028][ T5206] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 72.913912][ T5206] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 72.914867][ T5206] sp : ffff80001f827a80 [ 72.915575][ T5206] x29: ffff80001f827b10 x28: 0000000000000104 x27: ffff0000ec86c410 [ 72.916985][ T5206] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c159ad10 [ 72.918356][ T5206] x23: ffff0000defe90b0 x22: ffff0000d77e2000 x21: 1fffe0001bdfd221 [ 72.919585][ T5206] x20: ffff0000defe9108 x19: dfff800000000000 x18: 0000000000000000 [ 72.920882][ T5206] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 72.922397][ T5206] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 72.923834][ T5206] x11: ff8080000830061c x10: 0000000000000000 x9 : 94619e21f70c4800 [ 72.925328][ T5206] x8 : 94619e21f70c4800 x7 : 0000000000000001 x6 : 0000000000000001 [ 72.926722][ T5206] x5 : ffff80001f827398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 72.928138][ T5206] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 72.929550][ T5206] Call trace: [ 72.930129][ T5206] __btrfs_unlink_inode+0x8d8/0xab8 [ 72.931018][ T5206] btrfs_unlink+0x10c/0x25c [ 72.931916][ T5206] vfs_unlink+0x2e0/0x4f4 [ 72.932759][ T5206] do_unlinkat+0x318/0x624 [ 72.933546][ T5206] __arm64_sys_unlinkat+0xe0/0xfc [ 72.934537][ T5206] invoke_syscall+0x98/0x28c [ 72.935353][ T5206] el0_svc_common+0x13c/0x258 [ 72.936197][ T5206] do_el0_svc+0x5c/0x140 [ 72.936947][ T5206] el0_svc+0x78/0x1d0 [ 72.937601][ T5206] el0t_64_sync_handler+0xcc/0xe4 [ 72.938389][ T5206] el0t_64_sync+0x1a0/0x1a4 [ 72.939201][ T5206] irq event stamp: 79632 [ 72.939950][ T5206] hardirqs last enabled at (79631): [] __up_console_sem+0xb4/0xfc [ 72.941591][ T5206] hardirqs last disabled at (79632): [] el1_dbg+0x24/0x80 [ 72.943164][ T5206] softirqs last enabled at (79612): [] handle_softirqs+0xa70/0xc14 [ 72.944973][ T5206] softirqs last disabled at (79479): [] __irq_exit_rcu+0x240/0x434 [ 72.946716][ T5206] ---[ end trace 8bb78f314527dfd7 ]--- [ 72.949839][ T5206] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 72.951415][ T5206] BTRFS info (device loop0): forced readonly [ 73.124758][ T5229] loop0: detected capacity change from 0 to 32768 [ 73.133018][ T5229] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.33 (5229) [ 73.137795][ T5229] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 73.139584][ T5229] BTRFS info (device loop0): using free space tree [ 73.140689][ T5229] BTRFS info (device loop0): has skinny extents [ 73.161170][ T5229] BTRFS info (device loop0): enabling ssd optimizations [ 73.165964][ T5229] FAULT_INJECTION: forcing a failure. [ 73.165964][ T5229] name failslab, interval 1, probability 0, space 0, times 0 [ 73.167843][ T5229] CPU: 1 PID: 5229 Comm: syz.0.33 Tainted: G W syzkaller #0 [ 73.169153][ T5229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.170675][ T5229] Call trace: [ 73.171174][ T5229] dump_backtrace+0x0/0x458 [ 73.171886][ T5229] show_stack+0x2c/0x3c [ 73.172539][ T5229] __dump_stack+0x30/0x40 [ 73.173227][ T5229] dump_stack_lvl+0xf4/0x15c [ 73.173975][ T5229] dump_stack+0x1c/0x5c [ 73.174622][ T5229] should_fail+0x3c8/0x520 [ 73.175495][ T5229] __should_failslab+0xbc/0x10c [ 73.176357][ T5229] should_failslab+0x10/0x28 [ 73.177130][ T5229] slab_pre_alloc_hook+0x64/0xe8 [ 73.177924][ T5229] kmem_cache_alloc_trace+0x98/0x3f0 [ 73.178807][ T5229] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 73.179832][ T5229] __btrfs_unlink_inode+0x34c/0xab8 [ 73.180697][ T5229] btrfs_unlink+0x10c/0x25c [ 73.181503][ T5229] vfs_unlink+0x2e0/0x4f4 [ 73.182279][ T5229] do_unlinkat+0x318/0x624 [ 73.183027][ T5229] __arm64_sys_unlinkat+0xe0/0xfc [ 73.183889][ T5229] invoke_syscall+0x98/0x28c [ 73.184624][ T5229] el0_svc_common+0x13c/0x258 [ 73.185414][ T5229] do_el0_svc+0x5c/0x140 [ 73.186144][ T5229] el0_svc+0x78/0x1d0 [ 73.186834][ T5229] el0t_64_sync_handler+0xcc/0xe4 [ 73.187714][ T5229] el0t_64_sync+0x1a0/0x1a4 [ 73.189320][ T5229] ------------[ cut here ]------------ [ 73.190280][ T5229] WARNING: CPU: 1 PID: 5229 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 73.191846][ T5229] Modules linked in: [ 73.192463][ T5229] CPU: 1 PID: 5229 Comm: syz.0.33 Tainted: G W syzkaller #0 [ 73.193807][ T5229] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.195411][ T5229] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 73.196856][ T5229] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 73.197757][ T5229] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 73.198656][ T5229] sp : ffff80001f827a80 [ 73.199361][ T5229] x29: ffff80001f827b10 x28: 0000000000000104 x27: ffff0000ec86c010 [ 73.200718][ T5229] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000cdcf14d0 [ 73.202127][ T5229] x23: ffff0000defe9840 x22: ffff0000d8242000 x21: 1fffe0001bdfd313 [ 73.203590][ T5229] x20: ffff0000defe9898 x19: dfff800000000000 x18: 0000000000000000 [ 73.204853][ T5229] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 73.206259][ T5229] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 73.207563][ T5229] x11: ff8080000830061c x10: 0000000000000000 x9 : 2d91185586f38200 [ 73.208823][ T5229] x8 : 2d91185586f38200 x7 : 0000000000000001 x6 : 0000000000000001 [ 73.210193][ T5229] x5 : ffff80001f827398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 73.211541][ T5229] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 73.212879][ T5229] Call trace: [ 73.213411][ T5229] __btrfs_unlink_inode+0x8d8/0xab8 [ 73.214300][ T5229] btrfs_unlink+0x10c/0x25c [ 73.215049][ T5229] vfs_unlink+0x2e0/0x4f4 [ 73.215731][ T5229] do_unlinkat+0x318/0x624 [ 73.216460][ T5229] __arm64_sys_unlinkat+0xe0/0xfc [ 73.217323][ T5229] invoke_syscall+0x98/0x28c [ 73.218101][ T5229] el0_svc_common+0x13c/0x258 [ 73.218881][ T5229] do_el0_svc+0x5c/0x140 [ 73.219611][ T5229] el0_svc+0x78/0x1d0 [ 73.220300][ T5229] el0t_64_sync_handler+0xcc/0xe4 [ 73.221186][ T5229] el0t_64_sync+0x1a0/0x1a4 [ 73.221908][ T5229] irq event stamp: 78852 [ 73.222645][ T5229] hardirqs last enabled at (78851): [] __up_console_sem+0xb4/0xfc [ 73.224339][ T5229] hardirqs last disabled at (78852): [] el1_dbg+0x24/0x80 [ 73.225754][ T5229] softirqs last enabled at (78650): [] handle_softirqs+0xa70/0xc14 [ 73.227389][ T5229] softirqs last disabled at (78601): [] __irq_exit_rcu+0x240/0x434 [ 73.229034][ T5229] ---[ end trace 8bb78f314527dfd8 ]--- [ 73.232897][ T5229] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 73.234797][ T5229] BTRFS info (device loop0): forced readonly [ 73.414194][ T5252] loop0: detected capacity change from 0 to 32768 [ 73.485423][ T5252] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.34 (5252) [ 73.492101][ T5252] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 73.493504][ T5252] BTRFS info (device loop0): using free space tree [ 73.494887][ T5252] BTRFS info (device loop0): has skinny extents [ 73.502349][ T5252] BTRFS info (device loop0): enabling ssd optimizations [ 73.506166][ T5252] FAULT_INJECTION: forcing a failure. [ 73.506166][ T5252] name failslab, interval 1, probability 0, space 0, times 0 [ 73.508299][ T5252] CPU: 0 PID: 5252 Comm: syz.0.34 Tainted: G W syzkaller #0 [ 73.509734][ T5252] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.511191][ T5252] Call trace: [ 73.511715][ T5252] dump_backtrace+0x0/0x458 [ 73.512411][ T5252] show_stack+0x2c/0x3c [ 73.513081][ T5252] __dump_stack+0x30/0x40 [ 73.513758][ T5252] dump_stack_lvl+0xf4/0x15c [ 73.514476][ T5252] dump_stack+0x1c/0x5c [ 73.515215][ T5252] should_fail+0x3c8/0x520 [ 73.515950][ T5252] __should_failslab+0xbc/0x10c [ 73.516818][ T5252] should_failslab+0x10/0x28 [ 73.517559][ T5252] slab_pre_alloc_hook+0x64/0xe8 [ 73.518375][ T5252] kmem_cache_alloc_trace+0x98/0x3f0 [ 73.519353][ T5252] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 73.520476][ T5252] __btrfs_unlink_inode+0x34c/0xab8 [ 73.521438][ T5252] btrfs_unlink+0x10c/0x25c [ 73.522251][ T5252] vfs_unlink+0x2e0/0x4f4 [ 73.523017][ T5252] do_unlinkat+0x318/0x624 [ 73.523792][ T5252] __arm64_sys_unlinkat+0xe0/0xfc [ 73.524690][ T5252] invoke_syscall+0x98/0x28c [ 73.525479][ T5252] el0_svc_common+0x13c/0x258 [ 73.526313][ T5252] do_el0_svc+0x5c/0x140 [ 73.527111][ T5252] el0_svc+0x78/0x1d0 [ 73.527803][ T5252] el0t_64_sync_handler+0xcc/0xe4 [ 73.528640][ T5252] el0t_64_sync+0x1a0/0x1a4 [ 73.530017][ T5252] ------------[ cut here ]------------ [ 73.531004][ T5252] WARNING: CPU: 0 PID: 5252 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 73.532567][ T5252] Modules linked in: [ 73.533217][ T5252] CPU: 0 PID: 5252 Comm: syz.0.34 Tainted: G W syzkaller #0 [ 73.534544][ T5252] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.536181][ T5252] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 73.537520][ T5252] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 73.538404][ T5252] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 73.539347][ T5252] sp : ffff800023bc7a80 [ 73.540022][ T5252] x29: ffff800023bc7b10 x28: 0000000000000104 x27: ffff0000e2af4c10 [ 73.541401][ T5252] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c7ba7e70 [ 73.542758][ T5252] x23: ffff0000dce9a580 x22: ffff0000d64cc000 x21: 1fffe0001b9d34bb [ 73.544130][ T5252] x20: ffff0000dce9a5d8 x19: dfff800000000000 x18: 0000000000000000 [ 73.545553][ T5252] x17: 0000000000000000 x16: ffff8000082c63e0 x15: 0000000000000000 [ 73.546988][ T5252] x14: 0000000000000001 x13: 1ffff00004778e70 x12: 0000000000000000 [ 73.548385][ T5252] x11: ff8080000830061c x10: 0000000000000000 x9 : fd52a5cc16fa8500 [ 73.549764][ T5252] x8 : fd52a5cc16fa8500 x7 : 0000000000000001 x6 : 0000000000000001 [ 73.551195][ T5252] x5 : ffff800023bc7398 x4 : ffff80001446f500 x3 : ffff800008307f44 [ 73.552523][ T5252] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 73.553884][ T5252] Call trace: [ 73.554502][ T5252] __btrfs_unlink_inode+0x8d8/0xab8 [ 73.555400][ T5252] btrfs_unlink+0x10c/0x25c [ 73.556265][ T5252] vfs_unlink+0x2e0/0x4f4 [ 73.556988][ T5252] do_unlinkat+0x318/0x624 [ 73.557717][ T5252] __arm64_sys_unlinkat+0xe0/0xfc [ 73.558541][ T5252] invoke_syscall+0x98/0x28c [ 73.559266][ T5252] el0_svc_common+0x13c/0x258 [ 73.560082][ T5252] do_el0_svc+0x5c/0x140 [ 73.560790][ T5252] el0_svc+0x78/0x1d0 [ 73.561512][ T5252] el0t_64_sync_handler+0xcc/0xe4 [ 73.562323][ T5252] el0t_64_sync+0x1a0/0x1a4 [ 73.563099][ T5252] irq event stamp: 78998 [ 73.563818][ T5252] hardirqs last enabled at (78997): [] __up_console_sem+0xb4/0xfc [ 73.565516][ T5252] hardirqs last disabled at (78998): [] el1_dbg+0x24/0x80 [ 73.566990][ T5252] softirqs last enabled at (78978): [] handle_softirqs+0xa70/0xc14 [ 73.568617][ T5252] softirqs last disabled at (78937): [] __irq_exit_rcu+0x240/0x434 [ 73.570197][ T5252] ---[ end trace 8bb78f314527dfd9 ]--- [ 73.571527][ T5252] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 73.573171][ T5252] BTRFS info (device loop0): forced readonly [ 73.709981][ T5274] loop0: detected capacity change from 0 to 32768 [ 73.718469][ T5274] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.35 (5274) [ 73.723078][ T5274] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 73.724908][ T5274] BTRFS info (device loop0): using free space tree [ 73.726030][ T5274] BTRFS info (device loop0): has skinny extents [ 73.733644][ T5274] BTRFS info (device loop0): enabling ssd optimizations [ 73.738381][ T5274] FAULT_INJECTION: forcing a failure. [ 73.738381][ T5274] name failslab, interval 1, probability 0, space 0, times 0 [ 73.740438][ T5274] CPU: 0 PID: 5274 Comm: syz.0.35 Tainted: G W syzkaller #0 [ 73.741710][ T5274] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.743261][ T5274] Call trace: [ 73.743810][ T5274] dump_backtrace+0x0/0x458 [ 73.744564][ T5274] show_stack+0x2c/0x3c [ 73.745292][ T5274] __dump_stack+0x30/0x40 [ 73.745985][ T5274] dump_stack_lvl+0xf4/0x15c [ 73.746784][ T5274] dump_stack+0x1c/0x5c [ 73.747522][ T5274] should_fail+0x3c8/0x520 [ 73.748278][ T5274] __should_failslab+0xbc/0x10c [ 73.749119][ T5274] should_failslab+0x10/0x28 [ 73.749876][ T5274] slab_pre_alloc_hook+0x64/0xe8 [ 73.750738][ T5274] kmem_cache_alloc_trace+0x98/0x3f0 [ 73.751526][ T5274] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 73.752482][ T5274] __btrfs_unlink_inode+0x34c/0xab8 [ 73.753280][ T5274] btrfs_unlink+0x10c/0x25c [ 73.753999][ T5274] vfs_unlink+0x2e0/0x4f4 [ 73.754696][ T5274] do_unlinkat+0x318/0x624 [ 73.755528][ T5274] __arm64_sys_unlinkat+0xe0/0xfc [ 73.756418][ T5274] invoke_syscall+0x98/0x28c [ 73.757179][ T5274] el0_svc_common+0x13c/0x258 [ 73.757989][ T5274] do_el0_svc+0x5c/0x140 [ 73.758668][ T5274] el0_svc+0x78/0x1d0 [ 73.759418][ T5274] el0t_64_sync_handler+0xcc/0xe4 [ 73.760324][ T5274] el0t_64_sync+0x1a0/0x1a4 [ 73.763034][ T5274] ------------[ cut here ]------------ [ 73.764017][ T5274] WARNING: CPU: 0 PID: 5274 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 73.765502][ T5274] Modules linked in: [ 73.766113][ T5274] CPU: 0 PID: 5274 Comm: syz.0.35 Tainted: G W syzkaller #0 [ 73.767461][ T5274] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 73.769006][ T5274] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 73.770276][ T5274] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 73.771221][ T5274] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 73.772131][ T5274] sp : ffff800023bc7a80 [ 73.772847][ T5274] x29: ffff800023bc7b10 x28: 0000000000000104 x27: ffff0000e2af5410 [ 73.774246][ T5274] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d0722000 [ 73.775593][ T5274] x23: ffff0000dce9a6e0 x22: ffff0000eec50000 x21: 1fffe0001b9d34e7 [ 73.776866][ T5274] x20: ffff0000dce9a738 x19: dfff800000000000 x18: 0000000000000000 [ 73.778279][ T5274] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 73.779638][ T5274] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 73.780952][ T5274] x11: ff8080000830061c x10: 0000000000000000 x9 : 217ee4a6b3e9f400 [ 73.782285][ T5274] x8 : 217ee4a6b3e9f400 x7 : 0000000000000001 x6 : 0000000000000001 [ 73.783571][ T5274] x5 : ffff800023bc7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 73.784916][ T5274] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 73.786262][ T5274] Call trace: [ 73.786788][ T5274] __btrfs_unlink_inode+0x8d8/0xab8 [ 73.787651][ T5274] btrfs_unlink+0x10c/0x25c [ 73.788409][ T5274] vfs_unlink+0x2e0/0x4f4 [ 73.789180][ T5274] do_unlinkat+0x318/0x624 [ 73.789918][ T5274] __arm64_sys_unlinkat+0xe0/0xfc [ 73.790813][ T5274] invoke_syscall+0x98/0x28c [ 73.791565][ T5274] el0_svc_common+0x13c/0x258 [ 73.792362][ T5274] do_el0_svc+0x5c/0x140 [ 73.793092][ T5274] el0_svc+0x78/0x1d0 [ 73.793766][ T5274] el0t_64_sync_handler+0xcc/0xe4 [ 73.794604][ T5274] el0t_64_sync+0x1a0/0x1a4 [ 73.795344][ T5274] irq event stamp: 79336 [ 73.796024][ T5274] hardirqs last enabled at (79335): [] __up_console_sem+0xb4/0xfc [ 73.797582][ T5274] hardirqs last disabled at (79336): [] el1_dbg+0x24/0x80 [ 73.799049][ T5274] softirqs last enabled at (79316): [] handle_softirqs+0xa70/0xc14 [ 73.800664][ T5274] softirqs last disabled at (79255): [] __irq_exit_rcu+0x240/0x434 [ 73.802279][ T5274] ---[ end trace 8bb78f314527dfda ]--- [ 73.805303][ T5274] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 73.806812][ T5274] BTRFS info (device loop0): forced readonly [ 73.940921][ T5296] loop0: detected capacity change from 0 to 32768 [ 74.047189][ T5296] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.36 (5296) [ 74.051188][ T5296] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 74.052731][ T5296] BTRFS info (device loop0): using free space tree [ 74.053760][ T5296] BTRFS info (device loop0): has skinny extents [ 74.062047][ T5296] BTRFS info (device loop0): enabling ssd optimizations [ 74.066549][ T5296] FAULT_INJECTION: forcing a failure. [ 74.066549][ T5296] name failslab, interval 1, probability 0, space 0, times 0 [ 74.068822][ T5296] CPU: 1 PID: 5296 Comm: syz.0.36 Tainted: G W syzkaller #0 [ 74.070275][ T5296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.072143][ T5296] Call trace: [ 74.072666][ T5296] dump_backtrace+0x0/0x458 [ 74.073423][ T5296] show_stack+0x2c/0x3c [ 74.074166][ T5296] __dump_stack+0x30/0x40 [ 74.074996][ T5296] dump_stack_lvl+0xf4/0x15c [ 74.075841][ T5296] dump_stack+0x1c/0x5c [ 74.076604][ T5296] should_fail+0x3c8/0x520 [ 74.077360][ T5296] __should_failslab+0xbc/0x10c [ 74.078269][ T5296] should_failslab+0x10/0x28 [ 74.079211][ T5296] slab_pre_alloc_hook+0x64/0xe8 [ 74.080114][ T5296] kmem_cache_alloc_trace+0x98/0x3f0 [ 74.081088][ T5296] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 74.082247][ T5296] __btrfs_unlink_inode+0x34c/0xab8 [ 74.083196][ T5296] btrfs_unlink+0x10c/0x25c [ 74.084006][ T5296] vfs_unlink+0x2e0/0x4f4 [ 74.084777][ T5296] do_unlinkat+0x318/0x624 [ 74.085599][ T5296] __arm64_sys_unlinkat+0xe0/0xfc [ 74.086511][ T5296] invoke_syscall+0x98/0x28c [ 74.087313][ T5296] el0_svc_common+0x13c/0x258 [ 74.088170][ T5296] do_el0_svc+0x5c/0x140 [ 74.088901][ T5296] el0_svc+0x78/0x1d0 [ 74.089674][ T5296] el0t_64_sync_handler+0xcc/0xe4 [ 74.090548][ T5296] el0t_64_sync+0x1a0/0x1a4 [ 74.094952][ T5296] ------------[ cut here ]------------ [ 74.095973][ T5296] WARNING: CPU: 0 PID: 5296 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 74.097568][ T5296] Modules linked in: [ 74.098180][ T5296] CPU: 0 PID: 5296 Comm: syz.0.36 Tainted: G W syzkaller #0 [ 74.099629][ T5296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.101091][ T5296] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 74.102415][ T5296] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 74.103253][ T5296] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 74.104150][ T5296] sp : ffff800023bc7a80 [ 74.104799][ T5296] x29: ffff800023bc7b10 x28: 0000000000000104 x27: ffff0000ec86d010 [ 74.106088][ T5296] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000dd04e790 [ 74.107572][ T5296] x23: ffff0000defe9370 x22: ffff0000d1c58000 x21: 1fffe0001bdfd279 [ 74.109028][ T5296] x20: ffff0000defe93c8 x19: dfff800000000000 x18: 0000000000000000 [ 74.110408][ T5296] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 74.111775][ T5296] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 74.113078][ T5296] x11: ff8080000830061c x10: 0000000000000000 x9 : 1effeaccf1b53400 [ 74.114519][ T5296] x8 : 1effeaccf1b53400 x7 : 0000000000000001 x6 : 0000000000000001 [ 74.115835][ T5296] x5 : ffff800023bc7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 74.117183][ T5296] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 74.118626][ T5296] Call trace: [ 74.119216][ T5296] __btrfs_unlink_inode+0x8d8/0xab8 [ 74.120104][ T5296] btrfs_unlink+0x10c/0x25c [ 74.120908][ T5296] vfs_unlink+0x2e0/0x4f4 [ 74.121660][ T5296] do_unlinkat+0x318/0x624 [ 74.122340][ T5296] __arm64_sys_unlinkat+0xe0/0xfc [ 74.123199][ T5296] invoke_syscall+0x98/0x28c [ 74.124013][ T5296] el0_svc_common+0x13c/0x258 [ 74.124861][ T5296] do_el0_svc+0x5c/0x140 [ 74.125630][ T5296] el0_svc+0x78/0x1d0 [ 74.126306][ T5296] el0t_64_sync_handler+0xcc/0xe4 [ 74.127127][ T5296] el0t_64_sync+0x1a0/0x1a4 [ 74.127919][ T5296] irq event stamp: 79196 [ 74.128606][ T5296] hardirqs last enabled at (79195): [] __up_console_sem+0xb4/0xfc [ 74.130205][ T5296] hardirqs last disabled at (79196): [] el1_dbg+0x24/0x80 [ 74.131640][ T5296] softirqs last enabled at (79176): [] handle_softirqs+0xa70/0xc14 [ 74.133216][ T5296] softirqs last disabled at (79067): [] __irq_exit_rcu+0x240/0x434 [ 74.134916][ T5296] ---[ end trace 8bb78f314527dfdb ]--- [ 74.138671][ T5296] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 74.140305][ T5296] BTRFS info (device loop0): forced readonly [ 74.293923][ T5318] loop0: detected capacity change from 0 to 32768 [ 74.301288][ T5318] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.37 (5318) [ 74.305772][ T5318] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 74.307152][ T5318] BTRFS info (device loop0): using free space tree [ 74.308126][ T5318] BTRFS info (device loop0): has skinny extents [ 74.315550][ T5318] BTRFS info (device loop0): enabling ssd optimizations [ 74.319128][ T5318] FAULT_INJECTION: forcing a failure. [ 74.319128][ T5318] name failslab, interval 1, probability 0, space 0, times 0 [ 74.321059][ T5318] CPU: 0 PID: 5318 Comm: syz.0.37 Tainted: G W syzkaller #0 [ 74.322390][ T5318] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.323748][ T5318] Call trace: [ 74.324223][ T5318] dump_backtrace+0x0/0x458 [ 74.324937][ T5318] show_stack+0x2c/0x3c [ 74.325613][ T5318] __dump_stack+0x30/0x40 [ 74.326325][ T5318] dump_stack_lvl+0xf4/0x15c [ 74.327062][ T5318] dump_stack+0x1c/0x5c [ 74.327753][ T5318] should_fail+0x3c8/0x520 [ 74.328464][ T5318] __should_failslab+0xbc/0x10c [ 74.329260][ T5318] should_failslab+0x10/0x28 [ 74.330023][ T5318] slab_pre_alloc_hook+0x64/0xe8 [ 74.330895][ T5318] kmem_cache_alloc_trace+0x98/0x3f0 [ 74.331798][ T5318] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 74.332838][ T5318] __btrfs_unlink_inode+0x34c/0xab8 [ 74.333644][ T5318] btrfs_unlink+0x10c/0x25c [ 74.334379][ T5318] vfs_unlink+0x2e0/0x4f4 [ 74.335046][ T5318] do_unlinkat+0x318/0x624 [ 74.335784][ T5318] __arm64_sys_unlinkat+0xe0/0xfc [ 74.336583][ T5318] invoke_syscall+0x98/0x28c [ 74.337353][ T5318] el0_svc_common+0x13c/0x258 [ 74.338051][ T5318] do_el0_svc+0x5c/0x140 [ 74.338724][ T5318] el0_svc+0x78/0x1d0 [ 74.339415][ T5318] el0t_64_sync_handler+0xcc/0xe4 [ 74.340279][ T5318] el0t_64_sync+0x1a0/0x1a4 [ 74.342961][ T5318] ------------[ cut here ]------------ [ 74.343867][ T5318] WARNING: CPU: 0 PID: 5318 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 74.345301][ T5318] Modules linked in: [ 74.345947][ T5318] CPU: 0 PID: 5318 Comm: syz.0.37 Tainted: G W syzkaller #0 [ 74.347244][ T5318] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.348889][ T5318] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 74.350123][ T5318] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 74.351026][ T5318] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 74.351908][ T5318] sp : ffff800023bc7a80 [ 74.352553][ T5318] x29: ffff800023bc7b10 x28: 0000000000000104 x27: ffff0000e2af7410 [ 74.353825][ T5318] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d37760b0 [ 74.355081][ T5318] x23: ffff0000dce9a840 x22: ffff0000ecd24000 x21: 1fffe0001b9d3513 [ 74.356354][ T5318] x20: ffff0000dce9a898 x19: dfff800000000000 x18: 0000000000000000 [ 74.357652][ T5318] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 74.359007][ T5318] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 74.360342][ T5318] x11: ff8080000830061c x10: 0000000000000000 x9 : dc6be31793680500 [ 74.361712][ T5318] x8 : dc6be31793680500 x7 : 0000000000000001 x6 : 0000000000000001 [ 74.363071][ T5318] x5 : ffff800023bc7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 74.364403][ T5318] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 74.365732][ T5318] Call trace: [ 74.366302][ T5318] __btrfs_unlink_inode+0x8d8/0xab8 [ 74.367101][ T5318] btrfs_unlink+0x10c/0x25c [ 74.367795][ T5318] vfs_unlink+0x2e0/0x4f4 [ 74.368445][ T5318] do_unlinkat+0x318/0x624 [ 74.369132][ T5318] __arm64_sys_unlinkat+0xe0/0xfc [ 74.370035][ T5318] invoke_syscall+0x98/0x28c [ 74.370786][ T5318] el0_svc_common+0x13c/0x258 [ 74.371611][ T5318] do_el0_svc+0x5c/0x140 [ 74.372296][ T5318] el0_svc+0x78/0x1d0 [ 74.372921][ T5318] el0t_64_sync_handler+0xcc/0xe4 [ 74.373724][ T5318] el0t_64_sync+0x1a0/0x1a4 [ 74.374423][ T5318] irq event stamp: 79178 [ 74.375092][ T5318] hardirqs last enabled at (79177): [] __up_console_sem+0xb4/0xfc [ 74.376577][ T5318] hardirqs last disabled at (79178): [] el1_dbg+0x24/0x80 [ 74.378018][ T5318] softirqs last enabled at (79158): [] handle_softirqs+0xa70/0xc14 [ 74.379581][ T5318] softirqs last disabled at (79059): [] __irq_exit_rcu+0x240/0x434 [ 74.381137][ T5318] ---[ end trace 8bb78f314527dfdc ]--- [ 74.383849][ T5318] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 74.385503][ T5318] BTRFS info (device loop0): forced readonly [ 74.565316][ T5340] loop0: detected capacity change from 0 to 32768 [ 74.615707][ T5340] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.38 (5340) [ 74.676633][ T5340] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 74.678130][ T5340] BTRFS info (device loop0): using free space tree [ 74.679110][ T5340] BTRFS info (device loop0): has skinny extents [ 74.689941][ T5340] BTRFS info (device loop0): enabling ssd optimizations [ 74.695663][ T5340] FAULT_INJECTION: forcing a failure. [ 74.695663][ T5340] name failslab, interval 1, probability 0, space 0, times 0 [ 74.697735][ T5340] CPU: 0 PID: 5340 Comm: syz.0.38 Tainted: G W syzkaller #0 [ 74.699083][ T5340] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.700644][ T5340] Call trace: [ 74.701124][ T5340] dump_backtrace+0x0/0x458 [ 74.701862][ T5340] show_stack+0x2c/0x3c [ 74.702491][ T5340] __dump_stack+0x30/0x40 [ 74.703179][ T5340] dump_stack_lvl+0xf4/0x15c [ 74.703938][ T5340] dump_stack+0x1c/0x5c [ 74.704620][ T5340] should_fail+0x3c8/0x520 [ 74.705318][ T5340] __should_failslab+0xbc/0x10c [ 74.706053][ T5340] should_failslab+0x10/0x28 [ 74.706800][ T5340] slab_pre_alloc_hook+0x64/0xe8 [ 74.707641][ T5340] kmem_cache_alloc_trace+0x98/0x3f0 [ 74.708518][ T5340] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 74.709532][ T5340] __btrfs_unlink_inode+0x34c/0xab8 [ 74.710361][ T5340] btrfs_unlink+0x10c/0x25c [ 74.711160][ T5340] vfs_unlink+0x2e0/0x4f4 [ 74.711899][ T5340] do_unlinkat+0x318/0x624 [ 74.712570][ T5340] __arm64_sys_unlinkat+0xe0/0xfc [ 74.713379][ T5340] invoke_syscall+0x98/0x28c [ 74.714175][ T5340] el0_svc_common+0x13c/0x258 [ 74.714936][ T5340] do_el0_svc+0x5c/0x140 [ 74.715705][ T5340] el0_svc+0x78/0x1d0 [ 74.716415][ T5340] el0t_64_sync_handler+0xcc/0xe4 [ 74.717228][ T5340] el0t_64_sync+0x1a0/0x1a4 [ 74.718724][ T5340] ------------[ cut here ]------------ [ 74.719702][ T5340] WARNING: CPU: 0 PID: 5340 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 74.721250][ T5340] Modules linked in: [ 74.721845][ T5340] CPU: 0 PID: 5340 Comm: syz.0.38 Tainted: G W syzkaller #0 [ 74.723170][ T5340] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.724622][ T5340] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 74.725938][ T5340] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 74.726860][ T5340] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 74.727817][ T5340] sp : ffff8000241f7a80 [ 74.728486][ T5340] x29: ffff8000241f7b10 x28: 0000000000000104 x27: ffff0000e2af7810 [ 74.729818][ T5340] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c5ded840 [ 74.731226][ T5340] x23: ffff0000dce9a9a0 x22: ffff0000d77f2000 x21: 1fffe0001b9d353f [ 74.732528][ T5340] x20: ffff0000dce9a9f8 x19: dfff800000000000 x18: 0000000000000000 [ 74.733885][ T5340] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 74.735244][ T5340] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 74.736652][ T5340] x11: ff8080000830061c x10: 0000000000000000 x9 : 1940ad7704e61f00 [ 74.737991][ T5340] x8 : 1940ad7704e61f00 x7 : 0000000000000001 x6 : 0000000000000001 [ 74.739466][ T5340] x5 : ffff8000241f7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 74.740790][ T5340] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 74.742160][ T5340] Call trace: [ 74.742684][ T5340] __btrfs_unlink_inode+0x8d8/0xab8 [ 74.743562][ T5340] btrfs_unlink+0x10c/0x25c [ 74.744340][ T5340] vfs_unlink+0x2e0/0x4f4 [ 74.745076][ T5340] do_unlinkat+0x318/0x624 [ 74.745844][ T5340] __arm64_sys_unlinkat+0xe0/0xfc [ 74.746627][ T5340] invoke_syscall+0x98/0x28c [ 74.747415][ T5340] el0_svc_common+0x13c/0x258 [ 74.748228][ T5340] do_el0_svc+0x5c/0x140 [ 74.748917][ T5340] el0_svc+0x78/0x1d0 [ 74.749537][ T5340] el0t_64_sync_handler+0xcc/0xe4 [ 74.750376][ T5340] el0t_64_sync+0x1a0/0x1a4 [ 74.751120][ T5340] irq event stamp: 79044 [ 74.751851][ T5340] hardirqs last enabled at (79043): [] __up_console_sem+0xb4/0xfc [ 74.753405][ T5340] hardirqs last disabled at (79044): [] el1_dbg+0x24/0x80 [ 74.754816][ T5340] softirqs last enabled at (79024): [] handle_softirqs+0xa70/0xc14 [ 74.756480][ T5340] softirqs last disabled at (79017): [] __irq_exit_rcu+0x240/0x434 [ 74.757991][ T5340] ---[ end trace 8bb78f314527dfdd ]--- [ 74.759843][ T5340] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 74.761469][ T5340] BTRFS info (device loop0): forced readonly [ 74.884840][ T4154] Bluetooth: hci0: command 0x0419 tx timeout [ 74.906872][ T5363] loop0: detected capacity change from 0 to 32768 [ 74.914736][ T5363] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.39 (5363) [ 74.919311][ T5363] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 74.920791][ T5363] BTRFS info (device loop0): using free space tree [ 74.922438][ T5363] BTRFS info (device loop0): has skinny extents [ 74.930025][ T5363] BTRFS info (device loop0): enabling ssd optimizations [ 74.933828][ T5363] FAULT_INJECTION: forcing a failure. [ 74.933828][ T5363] name failslab, interval 1, probability 0, space 0, times 0 [ 74.936418][ T5363] CPU: 0 PID: 5363 Comm: syz.0.39 Tainted: G W syzkaller #0 [ 74.937813][ T5363] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.939446][ T5363] Call trace: [ 74.939922][ T5363] dump_backtrace+0x0/0x458 [ 74.940666][ T5363] show_stack+0x2c/0x3c [ 74.941286][ T5363] __dump_stack+0x30/0x40 [ 74.941971][ T5363] dump_stack_lvl+0xf4/0x15c [ 74.942698][ T5363] dump_stack+0x1c/0x5c [ 74.943304][ T5363] should_fail+0x3c8/0x520 [ 74.944001][ T5363] __should_failslab+0xbc/0x10c [ 74.944794][ T5363] should_failslab+0x10/0x28 [ 74.945615][ T5363] slab_pre_alloc_hook+0x64/0xe8 [ 74.946424][ T5363] kmem_cache_alloc_trace+0x98/0x3f0 [ 74.947190][ T5363] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 74.948139][ T5363] __btrfs_unlink_inode+0x34c/0xab8 [ 74.949083][ T5363] btrfs_unlink+0x10c/0x25c [ 74.949847][ T5363] vfs_unlink+0x2e0/0x4f4 [ 74.950549][ T5363] do_unlinkat+0x318/0x624 [ 74.951258][ T5363] __arm64_sys_unlinkat+0xe0/0xfc [ 74.952108][ T5363] invoke_syscall+0x98/0x28c [ 74.952841][ T5363] el0_svc_common+0x13c/0x258 [ 74.953602][ T5363] do_el0_svc+0x5c/0x140 [ 74.954332][ T5363] el0_svc+0x78/0x1d0 [ 74.955041][ T5363] el0t_64_sync_handler+0xcc/0xe4 [ 74.955900][ T5363] el0t_64_sync+0x1a0/0x1a4 [ 74.958230][ T5363] ------------[ cut here ]------------ [ 74.959178][ T5363] WARNING: CPU: 0 PID: 5363 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 74.960715][ T5363] Modules linked in: [ 74.961282][ T5363] CPU: 0 PID: 5363 Comm: syz.0.39 Tainted: G W syzkaller #0 [ 74.962611][ T5363] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 74.964203][ T5363] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 74.965513][ T5363] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 74.966467][ T5363] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 74.967437][ T5363] sp : ffff800024287a80 [ 74.968128][ T5363] x29: ffff800024287b10 x28: 0000000000000104 x27: ffff0000e2af7c10 [ 74.969445][ T5363] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000ca4f8160 [ 74.970846][ T5363] x23: ffff0000dce9ab00 x22: ffff0000d5836000 x21: 1fffe0001b9d356b [ 74.972167][ T5363] x20: ffff0000dce9ab58 x19: dfff800000000000 x18: 0000000000000000 [ 74.973584][ T5363] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 74.975037][ T5363] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 74.976415][ T5363] x11: ff8080000830061c x10: 0000000000000000 x9 : 3f6245291e781900 [ 74.977721][ T5363] x8 : 3f6245291e781900 x7 : 0000000000000001 x6 : 0000000000000001 [ 74.979119][ T5363] x5 : ffff800024287398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 74.980404][ T5363] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 74.981816][ T5363] Call trace: [ 74.982394][ T5363] __btrfs_unlink_inode+0x8d8/0xab8 [ 74.983261][ T5363] btrfs_unlink+0x10c/0x25c [ 74.984011][ T5363] vfs_unlink+0x2e0/0x4f4 [ 74.984739][ T5363] do_unlinkat+0x318/0x624 [ 74.985429][ T5363] __arm64_sys_unlinkat+0xe0/0xfc [ 74.986264][ T5363] invoke_syscall+0x98/0x28c [ 74.987021][ T5363] el0_svc_common+0x13c/0x258 [ 74.987757][ T5363] do_el0_svc+0x5c/0x140 [ 74.988511][ T5363] el0_svc+0x78/0x1d0 [ 74.989187][ T5363] el0t_64_sync_handler+0xcc/0xe4 [ 74.990075][ T5363] el0t_64_sync+0x1a0/0x1a4 [ 74.990850][ T5363] irq event stamp: 78982 [ 74.991542][ T5363] hardirqs last enabled at (78981): [] __up_console_sem+0xb4/0xfc [ 74.993096][ T5363] hardirqs last disabled at (78982): [] el1_dbg+0x24/0x80 [ 74.994604][ T5363] softirqs last enabled at (78962): [] handle_softirqs+0xa70/0xc14 [ 74.996279][ T5363] softirqs last disabled at (78895): [] __irq_exit_rcu+0x240/0x434 [ 74.998034][ T5363] ---[ end trace 8bb78f314527dfde ]--- [ 75.001004][ T5363] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 75.002505][ T5363] BTRFS info (device loop0): forced readonly [ 75.139441][ T5386] loop0: detected capacity change from 0 to 32768 [ 75.185707][ T5386] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.40 (5386) [ 75.188844][ T5386] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 75.190170][ T5386] BTRFS info (device loop0): using free space tree [ 75.191316][ T5386] BTRFS info (device loop0): has skinny extents [ 75.199416][ T5386] BTRFS info (device loop0): enabling ssd optimizations [ 75.205838][ T5386] FAULT_INJECTION: forcing a failure. [ 75.205838][ T5386] name failslab, interval 1, probability 0, space 0, times 0 [ 75.207734][ T5386] CPU: 0 PID: 5386 Comm: syz.0.40 Tainted: G W syzkaller #0 [ 75.209006][ T5386] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.210503][ T5386] Call trace: [ 75.210932][ T5386] dump_backtrace+0x0/0x458 [ 75.211604][ T5386] show_stack+0x2c/0x3c [ 75.212288][ T5386] __dump_stack+0x30/0x40 [ 75.212993][ T5386] dump_stack_lvl+0xf4/0x15c [ 75.213742][ T5386] dump_stack+0x1c/0x5c [ 75.214425][ T5386] should_fail+0x3c8/0x520 [ 75.215123][ T5386] __should_failslab+0xbc/0x10c [ 75.215961][ T5386] should_failslab+0x10/0x28 [ 75.216616][ T5386] slab_pre_alloc_hook+0x64/0xe8 [ 75.217377][ T5386] kmem_cache_alloc_trace+0x98/0x3f0 [ 75.218241][ T5386] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 75.219233][ T5386] __btrfs_unlink_inode+0x34c/0xab8 [ 75.220153][ T5386] btrfs_unlink+0x10c/0x25c [ 75.220854][ T5386] vfs_unlink+0x2e0/0x4f4 [ 75.221538][ T5386] do_unlinkat+0x318/0x624 [ 75.222303][ T5386] __arm64_sys_unlinkat+0xe0/0xfc [ 75.223173][ T5386] invoke_syscall+0x98/0x28c [ 75.223935][ T5386] el0_svc_common+0x13c/0x258 [ 75.224767][ T5386] do_el0_svc+0x5c/0x140 [ 75.225456][ T5386] el0_svc+0x78/0x1d0 [ 75.226110][ T5386] el0t_64_sync_handler+0xcc/0xe4 [ 75.226970][ T5386] el0t_64_sync+0x1a0/0x1a4 [ 75.229818][ T5386] ------------[ cut here ]------------ [ 75.230866][ T5386] WARNING: CPU: 0 PID: 5386 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 75.232314][ T5386] Modules linked in: [ 75.232922][ T5386] CPU: 0 PID: 5386 Comm: syz.0.40 Tainted: G W syzkaller #0 [ 75.234221][ T5386] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.236007][ T5386] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 75.237323][ T5386] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 75.238219][ T5386] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 75.239120][ T5386] sp : ffff8000241e7a80 [ 75.239761][ T5386] x29: ffff8000241e7b10 x28: 0000000000000104 x27: ffff0000e2af6010 [ 75.241066][ T5386] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c23c02c0 [ 75.242418][ T5386] x23: ffff0000dce9ac60 x22: ffff0000daac2000 x21: 1fffe0001b9d3597 [ 75.243768][ T5386] x20: ffff0000dce9acb8 x19: dfff800000000000 x18: 0000000000000000 [ 75.245009][ T5386] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 75.246411][ T5386] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 75.247895][ T5386] x11: ff8080000830061c x10: 0000000000000000 x9 : 6030548130f6f200 [ 75.249173][ T5386] x8 : 6030548130f6f200 x7 : 0000000000000001 x6 : 0000000000000001 [ 75.250503][ T5386] x5 : ffff8000241e7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 75.251916][ T5386] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 75.253245][ T5386] Call trace: [ 75.253816][ T5386] __btrfs_unlink_inode+0x8d8/0xab8 [ 75.254623][ T5386] btrfs_unlink+0x10c/0x25c [ 75.255351][ T5386] vfs_unlink+0x2e0/0x4f4 [ 75.256043][ T5386] do_unlinkat+0x318/0x624 [ 75.256733][ T5386] __arm64_sys_unlinkat+0xe0/0xfc [ 75.257571][ T5386] invoke_syscall+0x98/0x28c [ 75.258310][ T5386] el0_svc_common+0x13c/0x258 [ 75.259055][ T5386] do_el0_svc+0x5c/0x140 [ 75.259718][ T5386] el0_svc+0x78/0x1d0 [ 75.260420][ T5386] el0t_64_sync_handler+0xcc/0xe4 [ 75.261233][ T5386] el0t_64_sync+0x1a0/0x1a4 [ 75.261938][ T5386] irq event stamp: 79430 [ 75.262647][ T5386] hardirqs last enabled at (79429): [] __up_console_sem+0xb4/0xfc [ 75.264222][ T5386] hardirqs last disabled at (79430): [] el1_dbg+0x24/0x80 [ 75.265708][ T5386] softirqs last enabled at (79410): [] handle_softirqs+0xa70/0xc14 [ 75.267393][ T5386] softirqs last disabled at (79383): [] __irq_exit_rcu+0x240/0x434 [ 75.268988][ T5386] ---[ end trace 8bb78f314527dfdf ]--- [ 75.272838][ T5386] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 75.274533][ T5386] BTRFS info (device loop0): forced readonly [ 75.430292][ T5408] loop0: detected capacity change from 0 to 32768 [ 75.485726][ T5408] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.41 (5408) [ 75.534732][ T5408] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 75.536142][ T5408] BTRFS info (device loop0): using free space tree [ 75.537294][ T5408] BTRFS info (device loop0): has skinny extents [ 75.545134][ T5408] BTRFS info (device loop0): enabling ssd optimizations [ 75.549236][ T5408] FAULT_INJECTION: forcing a failure. [ 75.549236][ T5408] name failslab, interval 1, probability 0, space 0, times 0 [ 75.551429][ T5408] CPU: 1 PID: 5408 Comm: syz.0.41 Tainted: G W syzkaller #0 [ 75.552741][ T5408] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.554337][ T5408] Call trace: [ 75.554894][ T5408] dump_backtrace+0x0/0x458 [ 75.555623][ T5408] show_stack+0x2c/0x3c [ 75.556344][ T5408] __dump_stack+0x30/0x40 [ 75.557108][ T5408] dump_stack_lvl+0xf4/0x15c [ 75.557895][ T5408] dump_stack+0x1c/0x5c [ 75.558542][ T5408] should_fail+0x3c8/0x520 [ 75.559265][ T5408] __should_failslab+0xbc/0x10c [ 75.560044][ T5408] should_failslab+0x10/0x28 [ 75.560870][ T5408] slab_pre_alloc_hook+0x64/0xe8 [ 75.561766][ T5408] kmem_cache_alloc_trace+0x98/0x3f0 [ 75.562697][ T5408] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 75.563772][ T5408] __btrfs_unlink_inode+0x34c/0xab8 [ 75.564705][ T5408] btrfs_unlink+0x10c/0x25c [ 75.565580][ T5408] vfs_unlink+0x2e0/0x4f4 [ 75.566350][ T5408] do_unlinkat+0x318/0x624 [ 75.567095][ T5408] __arm64_sys_unlinkat+0xe0/0xfc [ 75.567900][ T5408] invoke_syscall+0x98/0x28c [ 75.568692][ T5408] el0_svc_common+0x13c/0x258 [ 75.569492][ T5408] do_el0_svc+0x5c/0x140 [ 75.570259][ T5408] el0_svc+0x78/0x1d0 [ 75.570901][ T5408] el0t_64_sync_handler+0xcc/0xe4 [ 75.571698][ T5408] el0t_64_sync+0x1a0/0x1a4 [ 75.573947][ T5408] ------------[ cut here ]------------ [ 75.575852][ T5408] WARNING: CPU: 1 PID: 5408 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 75.577396][ T5408] Modules linked in: [ 75.578010][ T5408] CPU: 1 PID: 5408 Comm: syz.0.41 Tainted: G W syzkaller #0 [ 75.579309][ T5408] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.580931][ T5408] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 75.582149][ T5408] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 75.583035][ T5408] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 75.583901][ T5408] sp : ffff8000245b7a80 [ 75.584615][ T5408] x29: ffff8000245b7b10 x28: 0000000000000104 x27: ffff0000ec86cc10 [ 75.586009][ T5408] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000e7204840 [ 75.587362][ T5408] x23: ffff0000defe96e0 x22: ffff0000c1280000 x21: 1fffe0001bdfd2e7 [ 75.588791][ T5408] x20: ffff0000defe9738 x19: dfff800000000000 x18: 0000000000000000 [ 75.590187][ T5408] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 75.591564][ T5408] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 75.593037][ T5408] x11: ff8080000830061c x10: 0000000000000000 x9 : 5a116af6b9cd9700 [ 75.594449][ T5408] x8 : 5a116af6b9cd9700 x7 : 0000000000000001 x6 : 0000000000000001 [ 75.595837][ T5408] x5 : ffff8000245b7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 75.597253][ T5408] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 75.598709][ T5408] Call trace: [ 75.599313][ T5408] __btrfs_unlink_inode+0x8d8/0xab8 [ 75.600220][ T5408] btrfs_unlink+0x10c/0x25c [ 75.600973][ T5408] vfs_unlink+0x2e0/0x4f4 [ 75.601748][ T5408] do_unlinkat+0x318/0x624 [ 75.602456][ T5408] __arm64_sys_unlinkat+0xe0/0xfc [ 75.603321][ T5408] invoke_syscall+0x98/0x28c [ 75.604133][ T5408] el0_svc_common+0x13c/0x258 [ 75.604971][ T5408] do_el0_svc+0x5c/0x140 [ 75.605809][ T5408] el0_svc+0x78/0x1d0 [ 75.606627][ T5408] el0t_64_sync_handler+0xcc/0xe4 [ 75.607556][ T5408] el0t_64_sync+0x1a0/0x1a4 [ 75.608405][ T5408] irq event stamp: 78486 [ 75.609116][ T5408] hardirqs last enabled at (78485): [] __up_console_sem+0xb4/0xfc [ 75.610728][ T5408] hardirqs last disabled at (78486): [] el1_dbg+0x24/0x80 [ 75.612248][ T5408] softirqs last enabled at (78474): [] handle_softirqs+0xa70/0xc14 [ 75.613794][ T5408] softirqs last disabled at (78455): [] __irq_exit_rcu+0x240/0x434 [ 75.615340][ T5408] ---[ end trace 8bb78f314527dfe0 ]--- [ 75.618539][ T5408] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 75.620219][ T5408] BTRFS info (device loop0): forced readonly [ 75.849914][ T5431] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.42 (5431) [ 75.852871][ T5431] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 75.854308][ T5431] BTRFS info (device loop0): using free space tree [ 75.855790][ T5431] BTRFS info (device loop0): has skinny extents [ 75.864000][ T5431] BTRFS info (device loop0): enabling ssd optimizations [ 75.868415][ T5431] FAULT_INJECTION: forcing a failure. [ 75.868415][ T5431] name failslab, interval 1, probability 0, space 0, times 0 [ 75.870513][ T5431] CPU: 0 PID: 5431 Comm: syz.0.42 Tainted: G W syzkaller #0 [ 75.871875][ T5431] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.873514][ T5431] Call trace: [ 75.873994][ T5431] dump_backtrace+0x0/0x458 [ 75.874736][ T5431] show_stack+0x2c/0x3c [ 75.875377][ T5431] __dump_stack+0x30/0x40 [ 75.876122][ T5431] dump_stack_lvl+0xf4/0x15c [ 75.876942][ T5431] dump_stack+0x1c/0x5c [ 75.877576][ T5431] should_fail+0x3c8/0x520 [ 75.878282][ T5431] __should_failslab+0xbc/0x10c [ 75.879056][ T5431] should_failslab+0x10/0x28 [ 75.879814][ T5431] slab_pre_alloc_hook+0x64/0xe8 [ 75.880637][ T5431] kmem_cache_alloc_trace+0x98/0x3f0 [ 75.881492][ T5431] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 75.882440][ T5431] __btrfs_unlink_inode+0x34c/0xab8 [ 75.883265][ T5431] btrfs_unlink+0x10c/0x25c [ 75.883999][ T5431] vfs_unlink+0x2e0/0x4f4 [ 75.884796][ T5431] do_unlinkat+0x318/0x624 [ 75.885494][ T5431] __arm64_sys_unlinkat+0xe0/0xfc [ 75.886355][ T5431] invoke_syscall+0x98/0x28c [ 75.887128][ T5431] el0_svc_common+0x13c/0x258 [ 75.887918][ T5431] do_el0_svc+0x5c/0x140 [ 75.888623][ T5431] el0_svc+0x78/0x1d0 [ 75.889353][ T5431] el0t_64_sync_handler+0xcc/0xe4 [ 75.890240][ T5431] el0t_64_sync+0x1a0/0x1a4 [ 75.891510][ T5431] ------------[ cut here ]------------ [ 75.892533][ T5431] WARNING: CPU: 0 PID: 5431 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 75.894023][ T5431] Modules linked in: [ 75.894591][ T5431] CPU: 0 PID: 5431 Comm: syz.0.42 Tainted: G W syzkaller #0 [ 75.896029][ T5431] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 75.897672][ T5431] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 75.898935][ T5431] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 75.899845][ T5431] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 75.900750][ T5431] sp : ffff8000245b7a80 [ 75.901462][ T5431] x29: ffff8000245b7b10 x28: 0000000000000104 x27: ffff0000e2af6c10 [ 75.902848][ T5431] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000cdc9b420 [ 75.904170][ T5431] x23: ffff0000dce9a0b0 x22: ffff0000d01ba000 x21: 1fffe0001b9d3421 [ 75.905427][ T5431] x20: ffff0000dce9a108 x19: dfff800000000000 x18: 0000000000000000 [ 75.906809][ T5431] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 75.908145][ T5431] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 75.909484][ T5431] x11: ff8080000830061c x10: 0000000000000000 x9 : e88badb1a7cf1300 [ 75.910803][ T5431] x8 : e88badb1a7cf1300 x7 : 0000000000000001 x6 : 0000000000000001 [ 75.912114][ T5431] x5 : ffff8000245b7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 75.913470][ T5431] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 75.914729][ T5431] Call trace: [ 75.915285][ T5431] __btrfs_unlink_inode+0x8d8/0xab8 [ 75.916131][ T5431] btrfs_unlink+0x10c/0x25c [ 75.916866][ T5431] vfs_unlink+0x2e0/0x4f4 [ 75.917603][ T5431] do_unlinkat+0x318/0x624 [ 75.918318][ T5431] __arm64_sys_unlinkat+0xe0/0xfc [ 75.919045][ T5431] invoke_syscall+0x98/0x28c [ 75.919786][ T5431] el0_svc_common+0x13c/0x258 [ 75.920496][ T5431] do_el0_svc+0x5c/0x140 [ 75.921198][ T5431] el0_svc+0x78/0x1d0 [ 75.921864][ T5431] el0t_64_sync_handler+0xcc/0xe4 [ 75.922675][ T5431] el0t_64_sync+0x1a0/0x1a4 [ 75.923446][ T5431] irq event stamp: 79190 [ 75.924117][ T5431] hardirqs last enabled at (79189): [] __up_console_sem+0xb4/0xfc [ 75.925584][ T5431] hardirqs last disabled at (79190): [] el1_dbg+0x24/0x80 [ 75.927006][ T5431] softirqs last enabled at (79170): [] handle_softirqs+0xa70/0xc14 [ 75.928631][ T5431] softirqs last disabled at (79127): [] __irq_exit_rcu+0x240/0x434 [ 75.930237][ T5431] ---[ end trace 8bb78f314527dfe1 ]--- [ 75.931467][ T5431] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 75.933016][ T5431] BTRFS info (device loop0): forced readonly [ 76.147011][ T5453] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.43 (5453) [ 76.150135][ T5453] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 76.151858][ T5453] BTRFS info (device loop0): using free space tree [ 76.152964][ T5453] BTRFS info (device loop0): has skinny extents [ 76.172351][ T5453] BTRFS info (device loop0): enabling ssd optimizations [ 76.176851][ T5453] FAULT_INJECTION: forcing a failure. [ 76.176851][ T5453] name failslab, interval 1, probability 0, space 0, times 0 [ 76.178948][ T5453] CPU: 0 PID: 5453 Comm: syz.0.43 Tainted: G W syzkaller #0 [ 76.180270][ T5453] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.181759][ T5453] Call trace: [ 76.182224][ T5453] dump_backtrace+0x0/0x458 [ 76.182940][ T5453] show_stack+0x2c/0x3c [ 76.183669][ T5453] __dump_stack+0x30/0x40 [ 76.184415][ T5453] dump_stack_lvl+0xf4/0x15c [ 76.185189][ T5453] dump_stack+0x1c/0x5c [ 76.185835][ T5453] should_fail+0x3c8/0x520 [ 76.186518][ T5453] __should_failslab+0xbc/0x10c [ 76.187330][ T5453] should_failslab+0x10/0x28 [ 76.188044][ T5453] slab_pre_alloc_hook+0x64/0xe8 [ 76.188876][ T5453] kmem_cache_alloc_trace+0x98/0x3f0 [ 76.189764][ T5453] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 76.190662][ T5453] __btrfs_unlink_inode+0x34c/0xab8 [ 76.191487][ T5453] btrfs_unlink+0x10c/0x25c [ 76.192284][ T5453] vfs_unlink+0x2e0/0x4f4 [ 76.193036][ T5453] do_unlinkat+0x318/0x624 [ 76.193776][ T5453] __arm64_sys_unlinkat+0xe0/0xfc [ 76.194600][ T5453] invoke_syscall+0x98/0x28c [ 76.195394][ T5453] el0_svc_common+0x13c/0x258 [ 76.196132][ T5453] do_el0_svc+0x5c/0x140 [ 76.196771][ T5453] el0_svc+0x78/0x1d0 [ 76.197406][ T5453] el0t_64_sync_handler+0xcc/0xe4 [ 76.198209][ T5453] el0t_64_sync+0x1a0/0x1a4 [ 76.200066][ T5453] ------------[ cut here ]------------ [ 76.201092][ T5453] WARNING: CPU: 0 PID: 5453 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 76.202548][ T5453] Modules linked in: [ 76.203064][ T5453] CPU: 0 PID: 5453 Comm: syz.0.43 Tainted: G W syzkaller #0 [ 76.204259][ T5453] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.205848][ T5453] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 76.207080][ T5453] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 76.208036][ T5453] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 76.209016][ T5453] sp : ffff8000246c7a80 [ 76.209676][ T5453] x29: ffff8000246c7b10 x28: 0000000000000104 x27: ffff0000e2af7010 [ 76.211012][ T5453] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d9d5f370 [ 76.212363][ T5453] x23: ffff0000dce9a370 x22: ffff0000c92a0000 x21: 1fffe0001b9d3479 [ 76.213720][ T5453] x20: ffff0000dce9a3c8 x19: dfff800000000000 x18: 0000000000000000 [ 76.215054][ T5453] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 76.216342][ T5453] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 76.217692][ T5453] x11: ff8080000830061c x10: 0000000000000000 x9 : a9b15da481f4ae00 [ 76.219120][ T5453] x8 : a9b15da481f4ae00 x7 : 0000000000000001 x6 : 0000000000000001 [ 76.220496][ T5453] x5 : ffff8000246c7398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 76.221686][ T5453] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 76.223267][ T5453] Call trace: [ 76.223803][ T5453] __btrfs_unlink_inode+0x8d8/0xab8 [ 76.224627][ T5453] btrfs_unlink+0x10c/0x25c [ 76.225349][ T5453] vfs_unlink+0x2e0/0x4f4 [ 76.225983][ T5453] do_unlinkat+0x318/0x624 [ 76.226723][ T5453] __arm64_sys_unlinkat+0xe0/0xfc [ 76.227512][ T5453] invoke_syscall+0x98/0x28c [ 76.228262][ T5453] el0_svc_common+0x13c/0x258 [ 76.229017][ T5453] do_el0_svc+0x5c/0x140 [ 76.229747][ T5453] el0_svc+0x78/0x1d0 [ 76.230389][ T5453] el0t_64_sync_handler+0xcc/0xe4 [ 76.231170][ T5453] el0t_64_sync+0x1a0/0x1a4 [ 76.231991][ T5453] irq event stamp: 78754 [ 76.232663][ T5453] hardirqs last enabled at (78753): [] __up_console_sem+0xb4/0xfc [ 76.234096][ T5453] hardirqs last disabled at (78754): [] el1_dbg+0x24/0x80 [ 76.235507][ T5453] softirqs last enabled at (78730): [] handle_softirqs+0xa70/0xc14 [ 76.237186][ T5453] softirqs last disabled at (78711): [] __irq_exit_rcu+0x240/0x434 [ 76.238746][ T5453] ---[ end trace 8bb78f314527dfe2 ]--- [ 76.240085][ T5453] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 76.241571][ T5453] BTRFS info (device loop0): forced readonly [ 76.471015][ T5475] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.44 (5475) [ 76.478571][ T5475] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 76.479940][ T5475] BTRFS info (device loop0): using free space tree [ 76.480851][ T5475] BTRFS info (device loop0): has skinny extents [ 76.554654][ T5475] BTRFS info (device loop0): enabling ssd optimizations [ 76.558535][ T5475] FAULT_INJECTION: forcing a failure. [ 76.558535][ T5475] name failslab, interval 1, probability 0, space 0, times 0 [ 76.561090][ T5475] CPU: 1 PID: 5475 Comm: syz.0.44 Tainted: G W syzkaller #0 [ 76.562483][ T5475] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.564069][ T5475] Call trace: [ 76.564673][ T5475] dump_backtrace+0x0/0x458 [ 76.565494][ T5475] show_stack+0x2c/0x3c [ 76.566216][ T5475] __dump_stack+0x30/0x40 [ 76.567003][ T5475] dump_stack_lvl+0xf4/0x15c [ 76.567789][ T5475] dump_stack+0x1c/0x5c [ 76.568482][ T5475] should_fail+0x3c8/0x520 [ 76.569224][ T5475] __should_failslab+0xbc/0x10c [ 76.570046][ T5475] should_failslab+0x10/0x28 [ 76.570820][ T5475] slab_pre_alloc_hook+0x64/0xe8 [ 76.571621][ T5475] kmem_cache_alloc_trace+0x98/0x3f0 [ 76.572508][ T5475] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 76.573573][ T5475] __btrfs_unlink_inode+0x34c/0xab8 [ 76.574442][ T5475] btrfs_unlink+0x10c/0x25c [ 76.575218][ T5475] vfs_unlink+0x2e0/0x4f4 [ 76.575945][ T5475] do_unlinkat+0x318/0x624 [ 76.576691][ T5475] __arm64_sys_unlinkat+0xe0/0xfc [ 76.577604][ T5475] invoke_syscall+0x98/0x28c [ 76.578385][ T5475] el0_svc_common+0x13c/0x258 [ 76.579204][ T5475] do_el0_svc+0x5c/0x140 [ 76.579936][ T5475] el0_svc+0x78/0x1d0 [ 76.580652][ T5475] el0t_64_sync_handler+0xcc/0xe4 [ 76.581518][ T5475] el0t_64_sync+0x1a0/0x1a4 [ 76.610099][ T5475] ------------[ cut here ]------------ [ 76.611119][ T5475] WARNING: CPU: 1 PID: 5475 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 76.612695][ T5475] Modules linked in: [ 76.613413][ T5475] CPU: 1 PID: 5475 Comm: syz.0.44 Tainted: G W syzkaller #0 [ 76.614911][ T5475] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.616678][ T5475] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 76.617991][ T5475] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 76.618934][ T5475] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 76.619862][ T5475] sp : ffff800024817a80 [ 76.620645][ T5475] x29: ffff800024817b10 x28: 0000000000000104 x27: ffff0000ec86c810 [ 76.622082][ T5475] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d56400b0 [ 76.623518][ T5475] x23: ffff0000defe9580 x22: ffff0000d98d4000 x21: 1fffe0001bdfd2bb [ 76.624910][ T5475] x20: ffff0000defe95d8 x19: dfff800000000000 x18: 0000000000000000 [ 76.626406][ T5475] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 76.627774][ T5475] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 76.629233][ T5475] x11: ff8080000830061c x10: 0000000000000000 x9 : 8a1dc2a6b29f3000 [ 76.630592][ T5475] x8 : 8a1dc2a6b29f3000 x7 : 0000000000000001 x6 : 0000000000000001 [ 76.632018][ T5475] x5 : ffff800024817398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 76.633487][ T5475] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 76.634959][ T5475] Call trace: [ 76.635544][ T5475] __btrfs_unlink_inode+0x8d8/0xab8 [ 76.636415][ T5475] btrfs_unlink+0x10c/0x25c [ 76.637202][ T5475] vfs_unlink+0x2e0/0x4f4 [ 76.637904][ T5475] do_unlinkat+0x318/0x624 [ 76.638786][ T5475] __arm64_sys_unlinkat+0xe0/0xfc [ 76.639605][ T5475] invoke_syscall+0x98/0x28c [ 76.640383][ T5475] el0_svc_common+0x13c/0x258 [ 76.641174][ T5475] do_el0_svc+0x5c/0x140 [ 76.641935][ T5475] el0_svc+0x78/0x1d0 [ 76.642627][ T5475] el0t_64_sync_handler+0xcc/0xe4 [ 76.643538][ T5475] el0t_64_sync+0x1a0/0x1a4 [ 76.644348][ T5475] irq event stamp: 79204 [ 76.645079][ T5475] hardirqs last enabled at (79203): [] __up_console_sem+0xb4/0xfc [ 76.646673][ T5475] hardirqs last disabled at (79204): [] el1_dbg+0x24/0x80 [ 76.648172][ T5475] softirqs last enabled at (79184): [] handle_softirqs+0xa70/0xc14 [ 76.649866][ T5475] softirqs last disabled at (79127): [] __irq_exit_rcu+0x240/0x434 [ 76.651586][ T5475] ---[ end trace 8bb78f314527dfe3 ]--- [ 76.666401][ T5475] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 76.668080][ T5475] BTRFS info (device loop0): forced readonly [ 76.920707][ T5497] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.45 (5497) [ 76.925925][ T5497] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 76.927490][ T5497] BTRFS info (device loop0): using free space tree [ 76.928399][ T5497] BTRFS info (device loop0): has skinny extents [ 76.936424][ T5497] BTRFS info (device loop0): enabling ssd optimizations [ 76.940500][ T5497] FAULT_INJECTION: forcing a failure. [ 76.940500][ T5497] name failslab, interval 1, probability 0, space 0, times 0 [ 76.942722][ T5497] CPU: 1 PID: 5497 Comm: syz.0.45 Tainted: G W syzkaller #0 [ 76.944128][ T5497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.945807][ T5497] Call trace: [ 76.946379][ T5497] dump_backtrace+0x0/0x458 [ 76.947226][ T5497] show_stack+0x2c/0x3c [ 76.947981][ T5497] __dump_stack+0x30/0x40 [ 76.948737][ T5497] dump_stack_lvl+0xf4/0x15c [ 76.949441][ T5497] dump_stack+0x1c/0x5c [ 76.950116][ T5497] should_fail+0x3c8/0x520 [ 76.950952][ T5497] __should_failslab+0xbc/0x10c [ 76.951795][ T5497] should_failslab+0x10/0x28 [ 76.952604][ T5497] slab_pre_alloc_hook+0x64/0xe8 [ 76.953455][ T5497] kmem_cache_alloc_trace+0x98/0x3f0 [ 76.954353][ T5497] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 76.955364][ T5497] __btrfs_unlink_inode+0x34c/0xab8 [ 76.956211][ T5497] btrfs_unlink+0x10c/0x25c [ 76.956977][ T5497] vfs_unlink+0x2e0/0x4f4 [ 76.957763][ T5497] do_unlinkat+0x318/0x624 [ 76.958537][ T5497] __arm64_sys_unlinkat+0xe0/0xfc [ 76.959432][ T5497] invoke_syscall+0x98/0x28c [ 76.960202][ T5497] el0_svc_common+0x13c/0x258 [ 76.961048][ T5497] do_el0_svc+0x5c/0x140 [ 76.961789][ T5497] el0_svc+0x78/0x1d0 [ 76.962507][ T5497] el0t_64_sync_handler+0xcc/0xe4 [ 76.963345][ T5497] el0t_64_sync+0x1a0/0x1a4 [ 76.965884][ T5497] ------------[ cut here ]------------ [ 76.966837][ T5497] WARNING: CPU: 1 PID: 5497 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 76.968340][ T5497] Modules linked in: [ 76.968916][ T5497] CPU: 1 PID: 5497 Comm: syz.0.45 Tainted: G W syzkaller #0 [ 76.970201][ T5497] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 76.971785][ T5497] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 76.973017][ T5497] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 76.973966][ T5497] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 76.974858][ T5497] sp : ffff800024927a80 [ 76.975606][ T5497] x29: ffff800024927b10 x28: 0000000000000104 x27: ffff0000ec86d410 [ 76.977103][ T5497] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d26b4a50 [ 76.978487][ T5497] x23: ffff0000defe94d0 x22: ffff0000ce308000 x21: 1fffe0001bdfd2a5 [ 76.979882][ T5497] x20: ffff0000defe9528 x19: dfff800000000000 x18: 0000000000000000 [ 76.981252][ T5497] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 76.982681][ T5497] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 76.984115][ T5497] x11: ff8080000830061c x10: 0000000000000000 x9 : 5d7037ecfde03b00 [ 76.985534][ T5497] x8 : 5d7037ecfde03b00 x7 : 0000000000000001 x6 : 0000000000000001 [ 76.986973][ T5497] x5 : ffff800024927398 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 76.988419][ T5497] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 76.989848][ T5497] Call trace: [ 76.990458][ T5497] __btrfs_unlink_inode+0x8d8/0xab8 [ 76.991355][ T5497] btrfs_unlink+0x10c/0x25c [ 76.992122][ T5497] vfs_unlink+0x2e0/0x4f4 [ 76.992882][ T5497] do_unlinkat+0x318/0x624 [ 76.993533][ T5497] __arm64_sys_unlinkat+0xe0/0xfc [ 76.994349][ T5497] invoke_syscall+0x98/0x28c [ 76.995079][ T5497] el0_svc_common+0x13c/0x258 [ 76.995953][ T5497] do_el0_svc+0x5c/0x140 [ 76.996655][ T5497] el0_svc+0x78/0x1d0 [ 76.997368][ T5497] el0t_64_sync_handler+0xcc/0xe4 [ 76.998233][ T5497] el0t_64_sync+0x1a0/0x1a4 [ 76.998957][ T5497] irq event stamp: 79594 [ 76.999735][ T5497] hardirqs last enabled at (79593): [] __up_console_sem+0xb4/0xfc [ 77.001386][ T5497] hardirqs last disabled at (79594): [] el1_dbg+0x24/0x80 [ 77.002875][ T5497] softirqs last enabled at (79574): [] handle_softirqs+0xa70/0xc14 [ 77.004638][ T5497] softirqs last disabled at (79557): [] __irq_exit_rcu+0x240/0x434 [ 77.006190][ T5497] ---[ end trace 8bb78f314527dfe4 ]--- [ 77.008962][ T5497] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 77.010498][ T5497] BTRFS info (device loop0): forced readonly 1970/01/01 00:01:17 executed programs: 33 [ 77.233647][ T5519] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.46 (5519) [ 77.244069][ T5519] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 77.245785][ T5519] BTRFS info (device loop0): using free space tree [ 77.246793][ T5519] BTRFS info (device loop0): has skinny extents [ 77.254763][ T5519] BTRFS info (device loop0): enabling ssd optimizations [ 77.258909][ T5519] FAULT_INJECTION: forcing a failure. [ 77.258909][ T5519] name failslab, interval 1, probability 0, space 0, times 0 [ 77.261056][ T5519] CPU: 1 PID: 5519 Comm: syz.0.46 Tainted: G W syzkaller #0 [ 77.262319][ T5519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.263928][ T5519] Call trace: [ 77.264483][ T5519] dump_backtrace+0x0/0x458 [ 77.265282][ T5519] show_stack+0x2c/0x3c [ 77.266056][ T5519] __dump_stack+0x30/0x40 [ 77.266821][ T5519] dump_stack_lvl+0xf4/0x15c [ 77.267632][ T5519] dump_stack+0x1c/0x5c [ 77.268416][ T5519] should_fail+0x3c8/0x520 [ 77.269189][ T5519] __should_failslab+0xbc/0x10c [ 77.270038][ T5519] should_failslab+0x10/0x28 [ 77.270884][ T5519] slab_pre_alloc_hook+0x64/0xe8 [ 77.271746][ T5519] kmem_cache_alloc_trace+0x98/0x3f0 [ 77.272635][ T5519] btrfs_delete_delayed_dir_index+0x22c/0x574 [ 77.273660][ T5519] __btrfs_unlink_inode+0x34c/0xab8 [ 77.274472][ T5519] btrfs_unlink+0x10c/0x25c [ 77.275228][ T5519] vfs_unlink+0x2e0/0x4f4 [ 77.275954][ T5519] do_unlinkat+0x318/0x624 [ 77.276741][ T5519] __arm64_sys_unlinkat+0xe0/0xfc [ 77.277586][ T5519] invoke_syscall+0x98/0x28c [ 77.278393][ T5519] el0_svc_common+0x13c/0x258 [ 77.279196][ T5519] do_el0_svc+0x5c/0x140 [ 77.279913][ T5519] el0_svc+0x78/0x1d0 [ 77.280604][ T5519] el0t_64_sync_handler+0xcc/0xe4 [ 77.281490][ T5519] el0t_64_sync+0x1a0/0x1a4 [ 77.282436][ T5519] ------------[ cut here ]------------ [ 77.283439][ T5519] WARNING: CPU: 1 PID: 5519 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x8d8/0xab8 [ 77.285055][ T5519] Modules linked in: [ 77.285692][ T5519] CPU: 1 PID: 5519 Comm: syz.0.46 Tainted: G W syzkaller #0 [ 77.287171][ T5519] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.288873][ T5519] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 77.290215][ T5519] pc : __btrfs_unlink_inode+0x8d8/0xab8 [ 77.291240][ T5519] lr : __btrfs_unlink_inode+0x8d8/0xab8 [ 77.292218][ T5519] sp : ffff800024b47a80 [ 77.292958][ T5519] x29: ffff800024b47b10 x28: 0000000000000104 x27: ffff0000ec86d810 [ 77.294348][ T5519] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d16c5b00 [ 77.295715][ T5519] x23: ffff0000defe9210 x22: ffff0000cf63a000 x21: 1fffe0001bdfd24d [ 77.297092][ T5519] x20: ffff0000defe9268 x19: dfff800000000000 x18: 0000000000000000 [ 77.298399][ T5519] x17: 0000000000000000 x16: ffff8000082c63e0 x15: 0000000000000000 [ 77.299749][ T5519] x14: 0000000000000001 x13: 1ffff00004968e70 x12: 0000000000000000 [ 77.301121][ T5519] x11: ff8080000830061c x10: 0000000000000000 x9 : d438697ca5279900 [ 77.302450][ T5519] x8 : d438697ca5279900 x7 : 0000000000000001 x6 : 0000000000000001 [ 77.303829][ T5519] x5 : ffff800024b47398 x4 : ffff80001446f500 x3 : ffff800008307f44 [ 77.305186][ T5519] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 77.306600][ T5519] Call trace: [ 77.307144][ T5519] __btrfs_unlink_inode+0x8d8/0xab8 [ 77.308082][ T5519] btrfs_unlink+0x10c/0x25c [ 77.308814][ T5519] vfs_unlink+0x2e0/0x4f4 [ 77.309557][ T5519] do_unlinkat+0x318/0x624 [ 77.310303][ T5519] __arm64_sys_unlinkat+0xe0/0xfc [ 77.311075][ T5519] invoke_syscall+0x98/0x28c [ 77.311892][ T5519] el0_svc_common+0x13c/0x258 [ 77.312710][ T5519] do_el0_svc+0x5c/0x140 [ 77.313432][ T5519] el0_svc+0x78/0x1d0 [ 77.314140][ T5519] el0t_64_sync_handler+0xcc/0xe4 [ 77.315013][ T5519] el0t_64_sync+0x1a0/0x1a4 [ 77.315759][ T5519] irq event stamp: 79228 [ 77.316481][ T5519] hardirqs last enabled at (79227): [] __up_console_sem+0xb4/0xfc [ 77.318101][ T5519] hardirqs last disabled at (79228): [] el1_dbg+0x24/0x80 [ 77.319567][ T5519] softirqs last enabled at (79208): [] handle_softirqs+0xa70/0xc14 [ 77.321278][ T5519] softirqs last disabled at (79185): [] __irq_exit_rcu+0x240/0x434 [ 77.322908][ T5519] ---[ end trace 8bb78f314527dfe5 ]--- [ 77.324177][ T5519] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 77.325872][ T5519] BTRFS info (device loop0): forced readonly [ 77.575733][ T5541] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.47 (5541) [ 77.578804][ T5541] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 77.580508][ T5541] BTRFS info (device loop0): using free space tree [ 77.581673][ T5541] BTRFS info (device loop0): has skinny extents [ 77.591819][ T5541] BTRFS info (device loop0): enabling ssd optimizations [ 77.597277][ T5541] FAULT_INJECTION: forcing a failure. [ 77.597277][ T5541] name failslab, interval 1, probability 0, space 0, times 0 [ 77.599348][ T5541] CPU: 0 PID: 5541 Comm: syz.0.47 Tainted: G W syzkaller #0 [ 77.600803][ T5541] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.602607][ T5541] Call trace: [ 77.603194][ T5541] dump_backtrace+0x0/0x458 [ 77.604001][ T5541] show_stack+0x2c/0x3c [ 77.604707][ T5541] __dump_stack+0x30/0x40 [ 77.605807][ T5541] dump_stack_lvl+0xf4/0x15c [ 77.606707][ T5541] dump_stack+0x1c/0x5c [ 77.607481][ T5541] should_fail+0x3c8/0x520 [ 77.608614][ T5541] __should_failslab+0xbc/0x10c [ 77.609453][ T5541] should_failslab+0x10/0x28 [ 77.610206][ T5541] slab_pre_alloc_hook+0x64/0xe8 [ 77.611083][ T5541] kmem_cache_alloc+0x94/0x3d8 [ 77.611928][ T5541] btrfs_alloc_path+0x5c/0x68 [ 77.612749][ T5541] __btrfs_unlink_inode+0x1e0/0xab8 [ 77.613661][ T5541] btrfs_unlink+0x10c/0x25c [ 77.614485][ T5541] vfs_unlink+0x2e0/0x4f4 [ 77.615274][ T5541] do_unlinkat+0x318/0x624 [ 77.616038][ T5541] __arm64_sys_unlinkat+0xe0/0xfc [ 77.616913][ T5541] invoke_syscall+0x98/0x28c [ 77.617715][ T5541] el0_svc_common+0x13c/0x258 [ 77.618484][ T5541] do_el0_svc+0x5c/0x140 [ 77.619232][ T5541] el0_svc+0x78/0x1d0 [ 77.619922][ T5541] el0t_64_sync_handler+0xcc/0xe4 [ 77.620772][ T5541] el0t_64_sync+0x1a0/0x1a4 [ 77.672006][ T4638] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 10 /dev/loop0 scanned by udevd (4638) [ 77.828356][ T5562] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 77.829860][ T5562] BTRFS info (device loop0): using free space tree [ 77.830858][ T5562] BTRFS info (device loop0): has skinny extents [ 77.845944][ T5562] BTRFS info (device loop0): enabling ssd optimizations [ 77.849671][ T5562] FAULT_INJECTION: forcing a failure. [ 77.849671][ T5562] name failslab, interval 1, probability 0, space 0, times 0 [ 77.851577][ T5562] CPU: 1 PID: 5562 Comm: syz.0.48 Tainted: G W syzkaller #0 [ 77.852923][ T5562] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/02/2026 [ 77.854504][ T5562] Call trace: [ 77.855083][ T5562] dump_backtrace+0x0/0x458