Warning: Permanently added '10.128.1.87' (ED25519) to the list of known hosts. 1970/01/01 00:01:05 ignoring optional flag "type"="gce" 1970/01/01 00:01:06 parsed 1 programs [ 67.435525][ T4514] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SSFS [ 69.614313][ T2062] ieee802154 phy0 wpan0: encryption failed: -22 [ 69.615491][ T2062] ieee802154 phy1 wpan1: encryption failed: -22 [ 69.624770][ T7] cfg80211: failed to load regulatory.db [ 70.519111][ T1060] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 70.520488][ T1060] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 70.521884][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 70.531812][ T1078] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 70.533441][ T1078] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 70.534771][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 70.752211][ T4563] chnl_net:caif_netlink_parms(): no params data found [ 70.772241][ T4563] bridge0: port 1(bridge_slave_0) entered blocking state [ 70.773777][ T4563] bridge0: port 1(bridge_slave_0) entered disabled state [ 70.775313][ T4563] device bridge_slave_0 entered promiscuous mode [ 70.777335][ T4563] bridge0: port 2(bridge_slave_1) entered blocking state [ 70.778456][ T4563] bridge0: port 2(bridge_slave_1) entered disabled state [ 70.779995][ T4563] device bridge_slave_1 entered promiscuous mode [ 70.788823][ T4563] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 70.791616][ T4563] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 70.801377][ T4563] team0: Port device team_slave_0 added [ 70.803663][ T4563] team0: Port device team_slave_1 added [ 70.811650][ T4563] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 70.813027][ T4563] 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. [ 70.817576][ T4563] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 70.820292][ T4563] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 70.821387][ T4563] 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. [ 70.826028][ T4563] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 70.863868][ T4563] device hsr_slave_0 entered promiscuous mode [ 70.903045][ T4563] device hsr_slave_1 entered promiscuous mode [ 71.513606][ T4563] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 71.544729][ T4563] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 71.594113][ T4563] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 71.633933][ T4563] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 71.703887][ T4563] 8021q: adding VLAN 0 to HW filter on device bond0 [ 71.709048][ T4563] 8021q: adding VLAN 0 to HW filter on device team0 [ 71.716515][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 71.718093][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 71.719465][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 71.720997][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 71.723580][ T1060] bridge0: port 1(bridge_slave_0) entered blocking state [ 71.724833][ T1060] bridge0: port 1(bridge_slave_0) entered forwarding state [ 71.726503][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 71.728318][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 71.729838][ T1060] bridge0: port 2(bridge_slave_1) entered blocking state [ 71.730954][ T1060] bridge0: port 2(bridge_slave_1) entered forwarding state [ 71.741530][ T4563] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 71.746063][ T4563] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 71.748695][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 71.750270][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 71.751973][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 71.756002][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 71.758364][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 71.759885][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 71.761630][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 71.763787][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 71.765363][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 71.767068][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 71.768609][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 71.772513][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 71.774674][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 71.844447][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 71.845799][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 71.849827][ T4563] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 71.857468][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 71.859182][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 71.865745][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 71.867421][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 71.868989][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 71.871424][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 71.875794][ T4563] device veth0_vlan entered promiscuous mode [ 71.879452][ T4563] device veth1_vlan entered promiscuous mode [ 71.889107][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 71.890803][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 71.892237][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 71.894451][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 71.896817][ T4563] device veth0_macvtap entered promiscuous mode [ 71.899558][ T4563] device veth1_macvtap entered promiscuous mode [ 71.905631][ T4563] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 71.906978][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 71.908569][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 71.910023][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 71.911582][ T1078] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 71.916660][ T4563] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 71.919831][ T4563] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.921278][ T4563] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.924423][ T4563] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.925845][ T4563] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 71.928540][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 71.930211][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready 1970/01/01 00:01:12 executed programs: 0 [ 72.285651][ T4690] chnl_net:caif_netlink_parms(): no params data found [ 72.311725][ T4690] bridge0: port 1(bridge_slave_0) entered blocking state [ 72.313471][ T4690] bridge0: port 1(bridge_slave_0) entered disabled state [ 72.314953][ T4690] device bridge_slave_0 entered promiscuous mode [ 72.317552][ T4690] bridge0: port 2(bridge_slave_1) entered blocking state [ 72.318753][ T4690] bridge0: port 2(bridge_slave_1) entered disabled state [ 72.320399][ T4690] device bridge_slave_1 entered promiscuous mode [ 72.330212][ T4690] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 72.340460][ T4690] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 72.356717][ T4690] team0: Port device team_slave_0 added [ 72.358805][ T4690] team0: Port device team_slave_1 added [ 72.370696][ T4690] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 72.371957][ T4690] 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. [ 72.377108][ T4690] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 72.379553][ T4690] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 72.380721][ T4690] 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. [ 72.386274][ T4690] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 72.434163][ T4690] device hsr_slave_0 entered promiscuous mode [ 72.483387][ T4690] device hsr_slave_1 entered promiscuous mode [ 72.503485][ T4690] debugfs: Directory 'hsr0' with parent 'hsr' already present! [ 72.504739][ T4690] Cannot create hsr debugfs directory [ 72.538302][ T4690] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 74.252968][ T7] Bluetooth: hci1: command 0x0409 tx timeout [ 75.512334][ T4690] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 76.332808][ T4173] Bluetooth: hci1: command 0x041b tx timeout [ 77.796950][ T4690] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.847912][ T4690] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 77.977084][ T4690] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 78.034057][ T4690] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 78.084232][ T4690] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 78.123991][ T4690] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 78.197393][ T4690] 8021q: adding VLAN 0 to HW filter on device bond0 [ 78.201393][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 78.203217][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 78.206166][ T4690] 8021q: adding VLAN 0 to HW filter on device team0 [ 78.208783][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 78.210508][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 78.212045][ T136] bridge0: port 1(bridge_slave_0) entered blocking state [ 78.213186][ T136] bridge0: port 1(bridge_slave_0) entered forwarding state [ 78.214793][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 78.217568][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 78.219187][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 78.220704][ T136] bridge0: port 2(bridge_slave_1) entered blocking state [ 78.221942][ T136] bridge0: port 2(bridge_slave_1) entered forwarding state [ 78.224762][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 78.227649][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 78.230599][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 78.232412][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 78.234701][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 78.238542][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 78.240299][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 78.243806][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 78.245376][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 78.248060][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 78.249586][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 78.252181][ T4690] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 78.300584][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 78.302111][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 78.307085][ T4690] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 78.315070][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 78.316836][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 78.324073][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 78.325640][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 78.327325][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 78.328755][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 78.331036][ T4690] device veth0_vlan entered promiscuous mode [ 78.335004][ T4690] device veth1_vlan entered promiscuous mode [ 78.343710][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 78.345353][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 78.346862][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 78.348573][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 78.351104][ T4690] device veth0_macvtap entered promiscuous mode [ 78.354551][ T4690] device veth1_macvtap entered promiscuous mode [ 78.359644][ T4690] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3e) already exists on: batadv_slave_0 [ 78.361407][ T4690] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 78.364649][ T4690] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 78.366014][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 78.367503][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 78.369009][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 78.370538][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 78.373235][ T4690] batman_adv: The newly added mac address (aa:aa:aa:aa:aa:3f) already exists on: batadv_slave_1 [ 78.374955][ T4690] batman_adv: It is strongly recommended to keep mac addresses unique to avoid problems! [ 78.377056][ T4690] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 78.378753][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 78.380360][ T1060] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 78.383333][ T4690] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.384718][ T4690] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.386232][ T4690] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.387712][ T4690] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 78.415315][ T4230] Bluetooth: hci1: command 0x040f tx timeout [ 78.416812][ T136] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.418102][ T136] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.419545][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 78.435311][ T136] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 78.436664][ T136] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 78.438114][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 1970/01/01 00:01:18 executed programs: 2 [ 78.555109][ T4946] loop0: detected capacity change from 0 to 32768 [ 78.600740][ T4946] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.15 (4946) [ 78.607537][ T4946] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 78.609136][ T4946] BTRFS info (device loop0): using free space tree [ 78.610381][ T4946] BTRFS info (device loop0): has skinny extents [ 78.622501][ T4946] BTRFS info (device loop0): enabling ssd optimizations [ 78.632729][ T4946] FAULT_INJECTION: forcing a failure. [ 78.632729][ T4946] name failslab, interval 1, probability 0, space 0, times 1 [ 78.636720][ T4946] CPU: 1 PID: 4946 Comm: syz.0.15 Not tainted syzkaller #0 [ 78.637830][ T4946] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 78.639495][ T4946] Call trace: [ 78.640022][ T4946] dump_backtrace+0x0/0x458 [ 78.640769][ T4946] show_stack+0x2c/0x3c [ 78.641509][ T4946] __dump_stack+0x30/0x40 [ 78.642255][ T4946] dump_stack_lvl+0xf4/0x15c [ 78.643031][ T4946] dump_stack+0x1c/0x5c [ 78.643706][ T4946] should_fail+0x3bc/0x514 [ 78.644441][ T4946] __should_failslab+0xbc/0x10c [ 78.645281][ T4946] should_failslab+0x10/0x28 [ 78.646054][ T4946] slab_pre_alloc_hook+0x64/0xe8 [ 78.646895][ T4946] kmem_cache_alloc_trace+0x98/0x3ec [ 78.647786][ T4946] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 78.648815][ T4946] __btrfs_unlink_inode+0x350/0xaec [ 78.649717][ T4946] btrfs_unlink+0x108/0x258 [ 78.650485][ T4946] vfs_unlink+0x2e0/0x4f4 [ 78.651181][ T4946] do_unlinkat+0x328/0x618 [ 78.651880][ T4946] __arm64_sys_unlinkat+0xe0/0xfc [ 78.652701][ T4946] invoke_syscall+0x98/0x2b0 [ 78.653419][ T4946] el0_svc_common+0x138/0x258 [ 78.654181][ T4946] do_el0_svc+0x58/0x13c [ 78.654914][ T4946] el0_svc+0x78/0x1d0 [ 78.655579][ T4946] el0t_64_sync_handler+0xcc/0xe4 [ 78.656416][ T4946] el0t_64_sync+0x1a0/0x1a4 [ 78.661696][ T4946] ------------[ cut here ]------------ [ 78.662748][ T4946] WARNING: CPU: 1 PID: 4946 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 78.664399][ T4946] Modules linked in: [ 78.665043][ T4946] CPU: 1 PID: 4946 Comm: syz.0.15 Not tainted syzkaller #0 [ 78.666262][ T4946] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 78.668000][ T4946] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 78.669310][ T4946] pc : __btrfs_unlink_inode+0x904/0xaec [ 78.670186][ T4946] lr : __btrfs_unlink_inode+0x904/0xaec [ 78.671087][ T4946] sp : ffff80001f767a60 [ 78.671773][ T4946] x29: ffff80001f767b10 x28: ffff0000d9f18000 x27: ffff0000dd7f4010 [ 78.673042][ T4946] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c26c6f20 [ 78.674301][ T4946] x23: ffff700003eecf54 x22: dfff800000000000 x21: ffff0000ed1b09d0 [ 78.675600][ T4946] x20: ffff0000df1b1108 x19: 1fffe0001be36221 x18: 0000000000000001 [ 78.676949][ T4946] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 78.678356][ T4946] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 78.679611][ T4946] x11: 0000000000000000 x10: 0000000000000000 x9 : 1182e2395e8a1b00 [ 78.680826][ T4946] x8 : 1182e2395e8a1b00 x7 : 0000000000000001 x6 : 0000000000000001 [ 78.682190][ T4946] x5 : ffff80001f767378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 78.683590][ T4946] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 78.684869][ T4946] Call trace: [ 78.685382][ T4946] __btrfs_unlink_inode+0x904/0xaec [ 78.686337][ T4946] btrfs_unlink+0x108/0x258 [ 78.687132][ T4946] vfs_unlink+0x2e0/0x4f4 [ 78.687809][ T4946] do_unlinkat+0x328/0x618 [ 78.688549][ T4946] __arm64_sys_unlinkat+0xe0/0xfc [ 78.689408][ T4946] invoke_syscall+0x98/0x2b0 [ 78.690208][ T4946] el0_svc_common+0x138/0x258 [ 78.690937][ T4946] do_el0_svc+0x58/0x13c [ 78.691643][ T4946] el0_svc+0x78/0x1d0 [ 78.692352][ T4946] el0t_64_sync_handler+0xcc/0xe4 [ 78.693251][ T4946] el0t_64_sync+0x1a0/0x1a4 [ 78.693990][ T4946] irq event stamp: 82188 [ 78.694700][ T4946] hardirqs last enabled at (82187): [] __up_console_sem+0xb4/0xfc [ 78.696296][ T4946] hardirqs last disabled at (82188): [] el1_dbg+0x24/0x80 [ 78.697667][ T4946] softirqs last enabled at (82168): [] handle_softirqs+0xa40/0xbe4 [ 78.699191][ T4946] softirqs last disabled at (82089): [] __irq_exit_rcu+0x240/0x43c [ 78.700755][ T4946] ---[ end trace 27e067890dc39769 ]--- [ 78.702056][ T4946] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 78.703934][ T4946] BTRFS info (device loop0): forced readonly [ 78.848278][ T4969] loop0: detected capacity change from 0 to 32768 [ 78.928085][ T4969] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.16 (4969) [ 78.934514][ T4969] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 78.936142][ T4969] BTRFS info (device loop0): using free space tree [ 78.937358][ T4969] BTRFS info (device loop0): has skinny extents [ 78.945579][ T4969] BTRFS info (device loop0): enabling ssd optimizations [ 78.951081][ T4969] FAULT_INJECTION: forcing a failure. [ 78.951081][ T4969] name failslab, interval 1, probability 0, space 0, times 0 [ 78.953666][ T4969] CPU: 0 PID: 4969 Comm: syz.0.16 Tainted: G W syzkaller #0 [ 78.955100][ T4969] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 78.956849][ T4969] Call trace: [ 78.957369][ T4969] dump_backtrace+0x0/0x458 [ 78.958110][ T4969] show_stack+0x2c/0x3c [ 78.958808][ T4969] __dump_stack+0x30/0x40 [ 78.959506][ T4969] dump_stack_lvl+0xf4/0x15c [ 78.960259][ T4969] dump_stack+0x1c/0x5c [ 78.960925][ T4969] should_fail+0x3bc/0x514 [ 78.961701][ T4969] __should_failslab+0xbc/0x10c [ 78.962557][ T4969] should_failslab+0x10/0x28 [ 78.963370][ T4969] slab_pre_alloc_hook+0x64/0xe8 [ 78.964158][ T4969] kmem_cache_alloc+0x94/0x3d4 [ 78.965041][ T4969] btrfs_alloc_path+0x5c/0x68 [ 78.965934][ T4969] __btrfs_unlink_inode+0x1dc/0xaec [ 78.966844][ T4969] btrfs_unlink+0x108/0x258 [ 78.967608][ T4969] vfs_unlink+0x2e0/0x4f4 [ 78.968321][ T4969] do_unlinkat+0x328/0x618 [ 78.969037][ T4969] __arm64_sys_unlinkat+0xe0/0xfc [ 78.969849][ T4969] invoke_syscall+0x98/0x2b0 [ 78.970613][ T4969] el0_svc_common+0x138/0x258 [ 78.971428][ T4969] do_el0_svc+0x58/0x13c [ 78.972148][ T4969] el0_svc+0x78/0x1d0 [ 78.972787][ T4969] el0t_64_sync_handler+0xcc/0xe4 [ 78.973641][ T4969] el0t_64_sync+0x1a0/0x1a4 [ 79.202294][ T4990] loop0: detected capacity change from 0 to 32768 [ 79.210045][ T4990] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.17 (4990) [ 79.218076][ T4990] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 79.219654][ T4990] BTRFS info (device loop0): using free space tree [ 79.220752][ T4990] BTRFS info (device loop0): has skinny extents [ 79.229665][ T4990] BTRFS info (device loop0): enabling ssd optimizations [ 79.235204][ T4990] FAULT_INJECTION: forcing a failure. [ 79.235204][ T4990] name failslab, interval 1, probability 0, space 0, times 0 [ 79.237240][ T4990] CPU: 0 PID: 4990 Comm: syz.0.17 Tainted: G W syzkaller #0 [ 79.238586][ T4990] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 79.240306][ T4990] Call trace: [ 79.240839][ T4990] dump_backtrace+0x0/0x458 [ 79.241550][ T4990] show_stack+0x2c/0x3c [ 79.242206][ T4990] __dump_stack+0x30/0x40 [ 79.242954][ T4990] dump_stack_lvl+0xf4/0x15c [ 79.243763][ T4990] dump_stack+0x1c/0x5c [ 79.244420][ T4990] should_fail+0x3bc/0x514 [ 79.245189][ T4990] __should_failslab+0xbc/0x10c [ 79.245956][ T4990] should_failslab+0x10/0x28 [ 79.246597][ T4990] slab_pre_alloc_hook+0x64/0xe8 [ 79.247304][ T4990] kmem_cache_alloc_trace+0x98/0x3ec [ 79.248268][ T4990] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 79.249322][ T4990] __btrfs_unlink_inode+0x350/0xaec [ 79.250191][ T4990] btrfs_unlink+0x108/0x258 [ 79.251007][ T4990] vfs_unlink+0x2e0/0x4f4 [ 79.251798][ T4990] do_unlinkat+0x328/0x618 [ 79.252525][ T4990] __arm64_sys_unlinkat+0xe0/0xfc [ 79.253486][ T4990] invoke_syscall+0x98/0x2b0 [ 79.254259][ T4990] el0_svc_common+0x138/0x258 [ 79.255008][ T4990] do_el0_svc+0x58/0x13c [ 79.255723][ T4990] el0_svc+0x78/0x1d0 [ 79.256373][ T4990] el0t_64_sync_handler+0xcc/0xe4 [ 79.257231][ T4990] el0t_64_sync+0x1a0/0x1a4 [ 79.260282][ T4990] ------------[ cut here ]------------ [ 79.261247][ T4990] WARNING: CPU: 0 PID: 4990 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 79.262710][ T4990] Modules linked in: [ 79.263328][ T4990] CPU: 0 PID: 4990 Comm: syz.0.17 Tainted: G W syzkaller #0 [ 79.264744][ T4990] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 79.266433][ T4990] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 79.267805][ T4990] pc : __btrfs_unlink_inode+0x904/0xaec [ 79.268729][ T4990] lr : __btrfs_unlink_inode+0x904/0xaec [ 79.269630][ T4990] sp : ffff80001bb57a60 [ 79.270306][ T4990] x29: ffff80001bb57b10 x28: ffff0000c94f4000 x27: ffff0000e2e54410 [ 79.271715][ T4990] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d296ad10 [ 79.273127][ T4990] x23: ffff70000376af54 x22: dfff800000000000 x21: ffff0000ed11c4b0 [ 79.274711][ T4990] x20: ffff0000df2e0268 x19: 1fffe0001be5c04d x18: 0000000000000001 [ 79.276059][ T4990] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 79.277483][ T4990] x14: 0000000000000001 x13: 1fffe000341f05ab x12: 0000000000ff0100 [ 79.278812][ T4990] x11: 0000000000000000 x10: 0000000000000000 x9 : eb21f925e2130c00 [ 79.280150][ T4990] x8 : eb21f925e2130c00 x7 : 0000000000000001 x6 : 0000000000000001 [ 79.281463][ T4990] x5 : ffff80001bb57378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 79.282854][ T4990] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 79.284290][ T4990] Call trace: [ 79.284802][ T4990] __btrfs_unlink_inode+0x904/0xaec [ 79.285657][ T4990] btrfs_unlink+0x108/0x258 [ 79.286406][ T4990] vfs_unlink+0x2e0/0x4f4 [ 79.287139][ T4990] do_unlinkat+0x328/0x618 [ 79.287895][ T4990] __arm64_sys_unlinkat+0xe0/0xfc [ 79.288739][ T4990] invoke_syscall+0x98/0x2b0 [ 79.289461][ T4990] el0_svc_common+0x138/0x258 [ 79.290272][ T4990] do_el0_svc+0x58/0x13c [ 79.290982][ T4990] el0_svc+0x78/0x1d0 [ 79.291651][ T4990] el0t_64_sync_handler+0xcc/0xe4 [ 79.292507][ T4990] el0t_64_sync+0x1a0/0x1a4 [ 79.293280][ T4990] irq event stamp: 80086 [ 79.294005][ T4990] hardirqs last enabled at (80085): [] __up_console_sem+0xb4/0xfc [ 79.295466][ T4990] hardirqs last disabled at (80086): [] el1_dbg+0x24/0x80 [ 79.296881][ T4990] softirqs last enabled at (80066): [] handle_softirqs+0xa40/0xbe4 [ 79.298421][ T4990] softirqs last disabled at (79963): [] __irq_exit_rcu+0x240/0x43c [ 79.300065][ T4990] ---[ end trace 27e067890dc3976a ]--- [ 79.304209][ T4990] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 79.305804][ T4990] BTRFS info (device loop0): forced readonly [ 79.448893][ T5018] loop0: detected capacity change from 0 to 32768 [ 79.460660][ T5018] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.18 (5018) [ 79.466281][ T5018] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 79.467831][ T5018] BTRFS info (device loop0): using free space tree [ 79.468864][ T5018] BTRFS info (device loop0): has skinny extents [ 79.477847][ T5018] BTRFS info (device loop0): enabling ssd optimizations [ 79.482699][ T5018] FAULT_INJECTION: forcing a failure. [ 79.482699][ T5018] name failslab, interval 1, probability 0, space 0, times 0 [ 79.485102][ T5018] CPU: 0 PID: 5018 Comm: syz.0.18 Tainted: G W syzkaller #0 [ 79.486459][ T5018] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 79.488097][ T5018] Call trace: [ 79.488650][ T5018] dump_backtrace+0x0/0x458 [ 79.489339][ T5018] show_stack+0x2c/0x3c [ 79.489995][ T5018] __dump_stack+0x30/0x40 [ 79.490721][ T5018] dump_stack_lvl+0xf4/0x15c [ 79.491469][ T5018] dump_stack+0x1c/0x5c [ 79.492155][ T5018] should_fail+0x3bc/0x514 [ 79.492855][ T5018] __should_failslab+0xbc/0x10c [ 79.493645][ T5018] should_failslab+0x10/0x28 [ 79.494448][ T5018] slab_pre_alloc_hook+0x64/0xe8 [ 79.495297][ T5018] kmem_cache_alloc+0x94/0x3d4 [ 79.496103][ T5018] start_transaction+0x4d0/0x13ec [ 79.496977][ T5018] btrfs_start_transaction_fallback_global_rsv+0x34/0x44 [ 79.498174][ T5018] btrfs_unlink+0x74/0x258 [ 79.498909][ T5018] vfs_unlink+0x2e0/0x4f4 [ 79.499678][ T5018] do_unlinkat+0x328/0x618 [ 79.500421][ T5018] __arm64_sys_unlinkat+0xe0/0xfc [ 79.501324][ T5018] invoke_syscall+0x98/0x2b0 [ 79.502123][ T5018] el0_svc_common+0x138/0x258 [ 79.502903][ T5018] do_el0_svc+0x58/0x13c [ 79.503633][ T5018] el0_svc+0x78/0x1d0 [ 79.504299][ T5018] el0t_64_sync_handler+0xcc/0xe4 [ 79.505165][ T5018] el0t_64_sync+0x1a0/0x1a4 [ 79.559609][ T4524] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 10 /dev/loop0 scanned by udevd (4524) [ 79.626080][ T148] device hsr_slave_0 left promiscuous mode [ 79.662381][ T5039] loop0: detected capacity change from 0 to 32768 [ 79.693172][ T148] device hsr_slave_1 left promiscuous mode [ 79.752923][ T148] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 79.754271][ T148] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 79.756173][ T148] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 79.757433][ T148] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 79.763303][ T5039] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 79.764836][ T5039] BTRFS info (device loop0): using free space tree [ 79.765952][ T5039] BTRFS info (device loop0): has skinny extents [ 79.773378][ T148] device bridge_slave_1 left promiscuous mode [ 79.774459][ T148] bridge0: port 2(bridge_slave_1) entered disabled state [ 79.788245][ T5039] BTRFS info (device loop0): enabling ssd optimizations [ 79.792539][ T5039] FAULT_INJECTION: forcing a failure. [ 79.792539][ T5039] name fail_page_alloc, interval 1, probability 0, space 0, times 1 [ 79.797283][ T5039] CPU: 1 PID: 5039 Comm: syz.0.19 Tainted: G W syzkaller #0 [ 79.798682][ T5039] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 79.800224][ T5039] Call trace: [ 79.800740][ T5039] dump_backtrace+0x0/0x458 [ 79.801511][ T5039] show_stack+0x2c/0x3c [ 79.802264][ T5039] __dump_stack+0x30/0x40 [ 79.803015][ T5039] dump_stack_lvl+0xf4/0x15c [ 79.803722][ T5039] dump_stack+0x1c/0x5c [ 79.804443][ T5039] should_fail+0x3bc/0x514 [ 79.805158][ T5039] should_fail_alloc_page+0x74/0xa8 [ 79.806051][ T5039] prepare_alloc_pages+0x160/0x45c [ 79.806909][ T5039] __alloc_pages+0x108/0x470 [ 79.807657][ T5039] alloc_pages+0x34c/0x5c0 [ 79.808405][ T5039] new_slab+0xe0/0x544 [ 79.809143][ T5039] ___slab_alloc+0x6b4/0xd8c [ 79.809912][ T5039] __slab_alloc+0x68/0xc0 [ 79.810694][ T5039] kmem_cache_alloc+0x2a4/0x3d4 [ 79.811546][ T5039] btrfs_alloc_path+0x5c/0x68 [ 79.812398][ T5039] __btrfs_unlink_inode+0x1dc/0xaec [ 79.813271][ T5039] btrfs_unlink+0x108/0x258 [ 79.813998][ T5039] vfs_unlink+0x2e0/0x4f4 [ 79.814718][ T5039] do_unlinkat+0x328/0x618 [ 79.815429][ T5039] __arm64_sys_unlinkat+0xe0/0xfc [ 79.816237][ T5039] invoke_syscall+0x98/0x2b0 [ 79.816987][ T5039] el0_svc_common+0x138/0x258 [ 79.817766][ T5039] do_el0_svc+0x58/0x13c [ 79.818479][ T5039] el0_svc+0x78/0x1d0 [ 79.819183][ T5039] el0t_64_sync_handler+0xcc/0xe4 [ 79.820004][ T5039] el0t_64_sync+0x1a0/0x1a4 [ 79.823813][ T148] device bridge_slave_0 left promiscuous mode [ 79.824848][ T148] bridge0: port 1(bridge_slave_0) entered disabled state [ 79.952989][ T148] device veth1_macvtap left promiscuous mode [ 79.954614][ T148] device veth0_macvtap left promiscuous mode [ 79.955638][ T148] device veth1_vlan left promiscuous mode [ 79.956688][ T148] device veth0_vlan left promiscuous mode [ 79.975227][ T5063] loop0: detected capacity change from 0 to 32768 [ 79.985882][ T5063] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.20 (5063) [ 79.989859][ T5063] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 79.991450][ T5063] BTRFS info (device loop0): using free space tree [ 79.992583][ T5063] BTRFS info (device loop0): has skinny extents [ 80.041449][ T5063] BTRFS info (device loop0): enabling ssd optimizations [ 80.053113][ T5063] FAULT_INJECTION: forcing a failure. [ 80.053113][ T5063] name failslab, interval 1, probability 0, space 0, times 0 [ 80.055302][ T5063] CPU: 1 PID: 5063 Comm: syz.0.20 Tainted: G W syzkaller #0 [ 80.056812][ T5063] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 80.058570][ T5063] Call trace: [ 80.059076][ T5063] dump_backtrace+0x0/0x458 [ 80.059842][ T5063] show_stack+0x2c/0x3c [ 80.060522][ T5063] __dump_stack+0x30/0x40 [ 80.061276][ T5063] dump_stack_lvl+0xf4/0x15c [ 80.062080][ T5063] dump_stack+0x1c/0x5c [ 80.062793][ T5063] should_fail+0x3bc/0x514 [ 80.063551][ T5063] __should_failslab+0xbc/0x10c [ 80.064410][ T5063] should_failslab+0x10/0x28 [ 80.065186][ T5063] slab_pre_alloc_hook+0x64/0xe8 [ 80.066061][ T5063] kmem_cache_alloc_trace+0x98/0x3ec [ 80.066960][ T5063] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 80.067948][ T5063] __btrfs_unlink_inode+0x350/0xaec [ 80.068788][ T5063] btrfs_unlink+0x108/0x258 [ 80.069547][ T5063] vfs_unlink+0x2e0/0x4f4 [ 80.070257][ T5063] do_unlinkat+0x328/0x618 [ 80.071008][ T5063] __arm64_sys_unlinkat+0xe0/0xfc [ 80.071872][ T5063] invoke_syscall+0x98/0x2b0 [ 80.072641][ T5063] el0_svc_common+0x138/0x258 [ 80.073430][ T5063] do_el0_svc+0x58/0x13c [ 80.074137][ T5063] el0_svc+0x78/0x1d0 [ 80.074843][ T5063] el0t_64_sync_handler+0xcc/0xe4 [ 80.075754][ T5063] el0t_64_sync+0x1a0/0x1a4 [ 80.078926][ T5063] ------------[ cut here ]------------ [ 80.087795][ T5063] WARNING: CPU: 1 PID: 5063 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 80.089413][ T5063] Modules linked in: [ 80.090033][ T5063] CPU: 1 PID: 5063 Comm: syz.0.20 Tainted: G W syzkaller #0 [ 80.091445][ T5063] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 80.093166][ T5063] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 80.094534][ T5063] pc : __btrfs_unlink_inode+0x904/0xaec [ 80.095389][ T5063] lr : __btrfs_unlink_inode+0x904/0xaec [ 80.096317][ T5063] sp : ffff800020447a60 [ 80.097008][ T5063] x29: ffff800020447b10 x28: ffff0000ce438000 x27: ffff0000dd7f4810 [ 80.098400][ T5063] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d3f6f160 [ 80.099684][ T5063] x23: ffff700004088f54 x22: dfff800000000000 x21: ffff0000ed1b4e80 [ 80.101076][ T5063] x20: ffff0000df1b1898 x19: 1fffe0001be36313 x18: 0000000000000001 [ 80.102451][ T5063] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 80.103799][ T5063] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 80.105212][ T5063] x11: 0000000000000000 x10: 0000000000000000 x9 : fc9fafb6226f9200 [ 80.106648][ T5063] x8 : fc9fafb6226f9200 x7 : 0000000000000001 x6 : 0000000000000001 [ 80.108015][ T5063] x5 : ffff800020447378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 80.109382][ T5063] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 80.110793][ T5063] Call trace: [ 80.111374][ T5063] __btrfs_unlink_inode+0x904/0xaec [ 80.112215][ T5063] btrfs_unlink+0x108/0x258 [ 80.112956][ T5063] vfs_unlink+0x2e0/0x4f4 [ 80.113664][ T5063] do_unlinkat+0x328/0x618 [ 80.114423][ T5063] __arm64_sys_unlinkat+0xe0/0xfc [ 80.115271][ T5063] invoke_syscall+0x98/0x2b0 [ 80.116079][ T5063] el0_svc_common+0x138/0x258 [ 80.116872][ T5063] do_el0_svc+0x58/0x13c [ 80.117547][ T5063] el0_svc+0x78/0x1d0 [ 80.118187][ T5063] el0t_64_sync_handler+0xcc/0xe4 [ 80.119018][ T5063] el0t_64_sync+0x1a0/0x1a4 [ 80.119804][ T5063] irq event stamp: 81026 [ 80.120528][ T5063] hardirqs last enabled at (81025): [] __up_console_sem+0xb4/0xfc [ 80.122142][ T5063] hardirqs last disabled at (81026): [] el1_dbg+0x24/0x80 [ 80.123634][ T5063] softirqs last enabled at (81002): [] handle_softirqs+0xa40/0xbe4 [ 80.125185][ T5063] softirqs last disabled at (80889): [] __irq_exit_rcu+0x240/0x43c [ 80.126668][ T5063] ---[ end trace 27e067890dc3976b ]--- [ 80.130382][ T5063] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 80.132166][ T5063] BTRFS info (device loop0): forced readonly [ 80.187258][ T148] team0 (unregistering): Port device team_slave_1 removed [ 80.194245][ T148] team0 (unregistering): Port device team_slave_0 removed [ 80.198629][ T148] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 80.239661][ T148] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 80.292314][ T5085] loop0: detected capacity change from 0 to 32768 [ 80.314073][ T5085] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.21 (5085) [ 80.319282][ T5085] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 80.320786][ T5085] BTRFS info (device loop0): using free space tree [ 80.321807][ T5085] BTRFS info (device loop0): has skinny extents [ 80.336192][ T5085] BTRFS info (device loop0): enabling ssd optimizations [ 80.340741][ T5085] FAULT_INJECTION: forcing a failure. [ 80.340741][ T5085] name failslab, interval 1, probability 0, space 0, times 0 [ 80.343242][ T5085] CPU: 0 PID: 5085 Comm: syz.0.21 Tainted: G W syzkaller #0 [ 80.344706][ T5085] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 80.346433][ T5085] Call trace: [ 80.347046][ T5085] dump_backtrace+0x0/0x458 [ 80.347823][ T5085] show_stack+0x2c/0x3c [ 80.348545][ T5085] __dump_stack+0x30/0x40 [ 80.349270][ T5085] dump_stack_lvl+0xf4/0x15c [ 80.350003][ T5085] dump_stack+0x1c/0x5c [ 80.350732][ T5085] should_fail+0x3bc/0x514 [ 80.351519][ T5085] __should_failslab+0xbc/0x10c [ 80.352317][ T5085] should_failslab+0x10/0x28 [ 80.353129][ T5085] slab_pre_alloc_hook+0x64/0xe8 [ 80.353938][ T5085] kmem_cache_alloc_trace+0x98/0x3ec [ 80.354828][ T5085] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 80.355858][ T5085] __btrfs_unlink_inode+0x350/0xaec [ 80.356743][ T5085] btrfs_unlink+0x108/0x258 [ 80.357516][ T5085] vfs_unlink+0x2e0/0x4f4 [ 80.358246][ T5085] do_unlinkat+0x328/0x618 [ 80.359028][ T5085] __arm64_sys_unlinkat+0xe0/0xfc [ 80.359911][ T5085] invoke_syscall+0x98/0x2b0 [ 80.360645][ T5085] el0_svc_common+0x138/0x258 [ 80.361460][ T5085] do_el0_svc+0x58/0x13c [ 80.362171][ T5085] el0_svc+0x78/0x1d0 [ 80.362860][ T5085] el0t_64_sync_handler+0xcc/0xe4 [ 80.363742][ T5085] el0t_64_sync+0x1a0/0x1a4 [ 80.365060][ T5085] ------------[ cut here ]------------ [ 80.366485][ T5085] WARNING: CPU: 0 PID: 5085 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 80.368081][ T5085] Modules linked in: [ 80.368742][ T5085] CPU: 0 PID: 5085 Comm: syz.0.21 Tainted: G W syzkaller #0 [ 80.370187][ T5085] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 80.371941][ T5085] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 80.373234][ T5085] pc : __btrfs_unlink_inode+0x904/0xaec [ 80.374226][ T5085] lr : __btrfs_unlink_inode+0x904/0xaec [ 80.375268][ T5085] sp : ffff800020217a60 [ 80.375950][ T5085] x29: ffff800020217b10 x28: ffff0000d8aec000 x27: ffff0000e2e54c10 [ 80.377174][ T148] bond0 (unregistering): Released all slaves [ 80.377396][ T5085] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d2c532c0 [ 80.379750][ T5085] x23: ffff700004042f54 x22: dfff800000000000 x21: ffff0000e2f41d70 [ 80.381079][ T5085] x20: ffff0000df2e05d8 x19: 1fffe0001be5c0bb x18: 0000000000000001 [ 80.382362][ T5085] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 80.383725][ T5085] x14: 0000000000000001 x13: 1fffe000341f05ab x12: 0000000000ff0100 [ 80.385084][ T5085] x11: 0000000000000000 x10: 0000000000000000 x9 : 14eb28907af62600 [ 80.386475][ T5085] x8 : 14eb28907af62600 x7 : 0000000000000001 x6 : 0000000000000001 [ 80.387873][ T5085] x5 : ffff800020217378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 80.389240][ T5085] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 80.390553][ T5085] Call trace: [ 80.391087][ T5085] __btrfs_unlink_inode+0x904/0xaec [ 80.391959][ T5085] btrfs_unlink+0x108/0x258 [ 80.392733][ T5085] vfs_unlink+0x2e0/0x4f4 [ 80.393497][ T5085] do_unlinkat+0x328/0x618 [ 80.394268][ T5085] __arm64_sys_unlinkat+0xe0/0xfc [ 80.395164][ T5085] invoke_syscall+0x98/0x2b0 [ 80.395928][ T5085] el0_svc_common+0x138/0x258 [ 80.396729][ T5085] do_el0_svc+0x58/0x13c [ 80.397465][ T5085] el0_svc+0x78/0x1d0 [ 80.398101][ T5085] el0t_64_sync_handler+0xcc/0xe4 [ 80.398978][ T5085] el0t_64_sync+0x1a0/0x1a4 [ 80.399766][ T5085] irq event stamp: 80214 [ 80.400415][ T5085] hardirqs last enabled at (80213): [] __up_console_sem+0xb4/0xfc [ 80.402012][ T5085] hardirqs last disabled at (80214): [] el1_dbg+0x24/0x80 [ 80.403494][ T5085] softirqs last enabled at (80190): [] handle_softirqs+0xa40/0xbe4 [ 80.405072][ T5085] softirqs last disabled at (80175): [] __irq_exit_rcu+0x240/0x43c [ 80.406661][ T5085] ---[ end trace 27e067890dc3976c ]--- [ 80.411032][ T5085] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 80.412734][ T5085] BTRFS info (device loop0): forced readonly [ 80.493015][ T4228] Bluetooth: hci1: command 0x0419 tx timeout [ 80.573036][ T5108] loop0: detected capacity change from 0 to 32768 [ 80.580596][ T5108] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.22 (5108) [ 80.585393][ T5108] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 80.587177][ T5108] BTRFS info (device loop0): using free space tree [ 80.588247][ T5108] BTRFS info (device loop0): has skinny extents [ 80.611544][ T5108] BTRFS info (device loop0): enabling ssd optimizations [ 80.617263][ T5108] FAULT_INJECTION: forcing a failure. [ 80.617263][ T5108] name failslab, interval 1, probability 0, space 0, times 0 [ 80.619457][ T5108] CPU: 0 PID: 5108 Comm: syz.0.22 Tainted: G W syzkaller #0 [ 80.620981][ T5108] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 80.622685][ T5108] Call trace: [ 80.623290][ T5108] dump_backtrace+0x0/0x458 [ 80.624087][ T5108] show_stack+0x2c/0x3c [ 80.624826][ T5108] __dump_stack+0x30/0x40 [ 80.625567][ T5108] dump_stack_lvl+0xf4/0x15c [ 80.626295][ T5108] dump_stack+0x1c/0x5c [ 80.626974][ T5108] should_fail+0x3bc/0x514 [ 80.627722][ T5108] __should_failslab+0xbc/0x10c [ 80.628574][ T5108] should_failslab+0x10/0x28 [ 80.629365][ T5108] slab_pre_alloc_hook+0x64/0xe8 [ 80.630215][ T5108] kmem_cache_alloc_trace+0x98/0x3ec [ 80.631115][ T5108] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 80.632141][ T5108] __btrfs_unlink_inode+0x350/0xaec [ 80.633112][ T5108] btrfs_unlink+0x108/0x258 [ 80.633927][ T5108] vfs_unlink+0x2e0/0x4f4 [ 80.634679][ T5108] do_unlinkat+0x328/0x618 [ 80.635451][ T5108] __arm64_sys_unlinkat+0xe0/0xfc [ 80.636322][ T5108] invoke_syscall+0x98/0x2b0 [ 80.637168][ T5108] el0_svc_common+0x138/0x258 [ 80.637983][ T5108] do_el0_svc+0x58/0x13c [ 80.638744][ T5108] el0_svc+0x78/0x1d0 [ 80.639363][ T5108] el0t_64_sync_handler+0xcc/0xe4 [ 80.645884][ T5108] el0t_64_sync+0x1a0/0x1a4 [ 80.647332][ T5108] ------------[ cut here ]------------ [ 80.648323][ T5108] WARNING: CPU: 0 PID: 5108 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 80.649816][ T5108] Modules linked in: [ 80.650465][ T5108] CPU: 0 PID: 5108 Comm: syz.0.22 Tainted: G W syzkaller #0 [ 80.651773][ T5108] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 80.653482][ T5108] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 80.654760][ T5108] pc : __btrfs_unlink_inode+0x904/0xaec [ 80.655726][ T5108] lr : __btrfs_unlink_inode+0x904/0xaec [ 80.656656][ T5108] sp : ffff800020217a60 [ 80.657414][ T5108] x29: ffff800020217b10 x28: ffff0000d5934000 x27: ffff0000dd7f4c10 [ 80.658840][ T5108] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d2c534d0 [ 80.660281][ T5108] x23: ffff700004042f54 x22: dfff800000000000 x21: ffff0000ed1b75c0 [ 80.661674][ T5108] x20: ffff0000df2e0688 x19: 1fffe0001be5c0d1 x18: 0000000000000001 [ 80.663099][ T5108] x17: 0000000000000000 x16: ffff800008304c04 x15: 00000000ffffffff [ 80.664468][ T5108] x14: 0000000000000001 x13: 1ffff00004042e6c x12: 0000000000ff0100 [ 80.665879][ T5108] x11: 0000000000000000 x10: 0000000000000000 x9 : e7192545468fb700 [ 80.667266][ T5108] x8 : e7192545468fb700 x7 : 0000000000000001 x6 : 0000000000000001 [ 80.668700][ T5108] x5 : ffff800020217378 x4 : ffff80001437f3e0 x3 : ffff800008304d14 [ 80.670041][ T5108] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 80.671469][ T5108] Call trace: [ 80.672021][ T5108] __btrfs_unlink_inode+0x904/0xaec [ 80.672852][ T5108] btrfs_unlink+0x108/0x258 [ 80.673612][ T5108] vfs_unlink+0x2e0/0x4f4 [ 80.674330][ T5108] do_unlinkat+0x328/0x618 [ 80.675100][ T5108] __arm64_sys_unlinkat+0xe0/0xfc [ 80.675954][ T5108] invoke_syscall+0x98/0x2b0 [ 80.676787][ T5108] el0_svc_common+0x138/0x258 [ 80.677608][ T5108] do_el0_svc+0x58/0x13c [ 80.678309][ T5108] el0_svc+0x78/0x1d0 [ 80.679031][ T5108] el0t_64_sync_handler+0xcc/0xe4 [ 80.679861][ T5108] el0t_64_sync+0x1a0/0x1a4 [ 80.680673][ T5108] irq event stamp: 81300 [ 80.681400][ T5108] hardirqs last enabled at (81299): [] __up_console_sem+0xb4/0xfc [ 80.683093][ T5108] hardirqs last disabled at (81300): [] el1_dbg+0x24/0x80 [ 80.684656][ T5108] softirqs last enabled at (81280): [] handle_softirqs+0xa40/0xbe4 [ 80.686209][ T5108] softirqs last disabled at (81165): [] __irq_exit_rcu+0x240/0x43c [ 80.687797][ T5108] ---[ end trace 27e067890dc3976d ]--- [ 80.689122][ T5108] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 80.690738][ T5108] BTRFS info (device loop0): forced readonly [ 80.883462][ T5130] loop0: detected capacity change from 0 to 32768 [ 80.928247][ T5130] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.23 (5130) [ 80.932580][ T5130] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 80.935747][ T5130] BTRFS info (device loop0): using free space tree [ 80.936987][ T5130] BTRFS info (device loop0): has skinny extents [ 80.945055][ T5130] BTRFS info (device loop0): enabling ssd optimizations [ 80.949565][ T5130] FAULT_INJECTION: forcing a failure. [ 80.949565][ T5130] name failslab, interval 1, probability 0, space 0, times 0 [ 80.951770][ T5130] CPU: 1 PID: 5130 Comm: syz.0.23 Tainted: G W syzkaller #0 [ 80.953164][ T5130] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 80.954819][ T5130] Call trace: [ 80.955381][ T5130] dump_backtrace+0x0/0x458 [ 80.956135][ T5130] show_stack+0x2c/0x3c [ 80.956822][ T5130] __dump_stack+0x30/0x40 [ 80.957563][ T5130] dump_stack_lvl+0xf4/0x15c [ 80.958342][ T5130] dump_stack+0x1c/0x5c [ 80.959021][ T5130] should_fail+0x3bc/0x514 [ 80.959718][ T5130] __should_failslab+0xbc/0x10c [ 80.960530][ T5130] should_failslab+0x10/0x28 [ 80.961258][ T5130] slab_pre_alloc_hook+0x64/0xe8 [ 80.962101][ T5130] kmem_cache_alloc_trace+0x98/0x3ec [ 80.962997][ T5130] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 80.963997][ T5130] __btrfs_unlink_inode+0x350/0xaec [ 80.964869][ T5130] btrfs_unlink+0x108/0x258 [ 80.965632][ T5130] vfs_unlink+0x2e0/0x4f4 [ 80.966373][ T5130] do_unlinkat+0x328/0x618 [ 80.967120][ T5130] __arm64_sys_unlinkat+0xe0/0xfc [ 80.968072][ T5130] invoke_syscall+0x98/0x2b0 [ 80.968788][ T5130] el0_svc_common+0x138/0x258 [ 80.969567][ T5130] do_el0_svc+0x58/0x13c [ 80.970241][ T5130] el0_svc+0x78/0x1d0 [ 80.970915][ T5130] el0t_64_sync_handler+0xcc/0xe4 [ 80.971808][ T5130] el0t_64_sync+0x1a0/0x1a4 [ 80.975533][ T5130] ------------[ cut here ]------------ [ 80.976555][ T5130] WARNING: CPU: 1 PID: 5130 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 80.978061][ T5130] Modules linked in: [ 80.978675][ T5130] CPU: 1 PID: 5130 Comm: syz.0.23 Tainted: G W syzkaller #0 [ 80.980126][ T5130] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 80.981851][ T5130] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 80.983213][ T5130] pc : __btrfs_unlink_inode+0x904/0xaec [ 80.984144][ T5130] lr : __btrfs_unlink_inode+0x904/0xaec [ 80.985047][ T5130] sp : ffff8000206c7a60 [ 80.985751][ T5130] x29: ffff8000206c7b10 x28: ffff0000ecf86000 x27: ffff0000dd7f5010 [ 80.987022][ T5130] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d22d1d10 [ 80.988347][ T5130] x23: ffff7000040d8f54 x22: dfff800000000000 x21: ffff0000ed1c1d70 [ 80.989753][ T5130] x20: ffff0000df1b1aa8 x19: 1fffe0001be36355 x18: 0000000000000001 [ 80.991140][ T5130] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 80.992462][ T5130] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 80.993797][ T5130] x11: 0000000000000000 x10: 0000000000000000 x9 : 26fdb84b34493c00 [ 80.995151][ T5130] x8 : 26fdb84b34493c00 x7 : 0000000000000001 x6 : 0000000000000001 [ 80.996371][ T5130] x5 : ffff8000206c7378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 80.997696][ T5130] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 80.998990][ T5130] Call trace: [ 80.999536][ T5130] __btrfs_unlink_inode+0x904/0xaec [ 81.000390][ T5130] btrfs_unlink+0x108/0x258 [ 81.001119][ T5130] vfs_unlink+0x2e0/0x4f4 [ 81.001802][ T5130] do_unlinkat+0x328/0x618 [ 81.002517][ T5130] __arm64_sys_unlinkat+0xe0/0xfc [ 81.003351][ T5130] invoke_syscall+0x98/0x2b0 [ 81.004134][ T5130] el0_svc_common+0x138/0x258 [ 81.004899][ T5130] do_el0_svc+0x58/0x13c [ 81.005620][ T5130] el0_svc+0x78/0x1d0 [ 81.006318][ T5130] el0t_64_sync_handler+0xcc/0xe4 [ 81.007241][ T5130] el0t_64_sync+0x1a0/0x1a4 [ 81.007993][ T5130] irq event stamp: 80476 [ 81.008663][ T5130] hardirqs last enabled at (80475): [] __up_console_sem+0xb4/0xfc [ 81.010151][ T5130] hardirqs last disabled at (80476): [] el1_dbg+0x24/0x80 [ 81.011642][ T5130] softirqs last enabled at (80456): [] handle_softirqs+0xa40/0xbe4 [ 81.013309][ T5130] softirqs last disabled at (80439): [] __irq_exit_rcu+0x240/0x43c [ 81.014977][ T5130] ---[ end trace 27e067890dc3976e ]--- [ 81.020737][ T5130] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 81.022219][ T5130] BTRFS info (device loop0): forced readonly [ 81.178595][ T5152] loop0: detected capacity change from 0 to 32768 [ 81.186975][ T5152] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.24 (5152) [ 81.191941][ T5152] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 81.193657][ T5152] BTRFS info (device loop0): using free space tree [ 81.194746][ T5152] BTRFS info (device loop0): has skinny extents [ 81.207193][ T5152] BTRFS info (device loop0): enabling ssd optimizations [ 81.211124][ T5152] FAULT_INJECTION: forcing a failure. [ 81.211124][ T5152] name failslab, interval 1, probability 0, space 0, times 0 [ 81.213966][ T5152] CPU: 1 PID: 5152 Comm: syz.0.24 Tainted: G W syzkaller #0 [ 81.215457][ T5152] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 81.217187][ T5152] Call trace: [ 81.217740][ T5152] dump_backtrace+0x0/0x458 [ 81.218513][ T5152] show_stack+0x2c/0x3c [ 81.219229][ T5152] __dump_stack+0x30/0x40 [ 81.219987][ T5152] dump_stack_lvl+0xf4/0x15c [ 81.220770][ T5152] dump_stack+0x1c/0x5c [ 81.221474][ T5152] should_fail+0x3bc/0x514 [ 81.222199][ T5152] __should_failslab+0xbc/0x10c [ 81.223008][ T5152] should_failslab+0x10/0x28 [ 81.223802][ T5152] slab_pre_alloc_hook+0x64/0xe8 [ 81.224646][ T5152] kmem_cache_alloc_trace+0x98/0x3ec [ 81.225574][ T5152] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 81.226649][ T5152] __btrfs_unlink_inode+0x350/0xaec [ 81.227526][ T5152] btrfs_unlink+0x108/0x258 [ 81.228235][ T5152] vfs_unlink+0x2e0/0x4f4 [ 81.228878][ T5152] do_unlinkat+0x328/0x618 [ 81.229625][ T5152] __arm64_sys_unlinkat+0xe0/0xfc [ 81.230463][ T5152] invoke_syscall+0x98/0x2b0 [ 81.231188][ T5152] el0_svc_common+0x138/0x258 [ 81.231963][ T5152] do_el0_svc+0x58/0x13c [ 81.232676][ T5152] el0_svc+0x78/0x1d0 [ 81.233345][ T5152] el0t_64_sync_handler+0xcc/0xe4 [ 81.234135][ T5152] el0t_64_sync+0x1a0/0x1a4 [ 81.238812][ T5152] ------------[ cut here ]------------ [ 81.239871][ T5152] WARNING: CPU: 1 PID: 5152 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 81.241355][ T5152] Modules linked in: [ 81.241975][ T5152] CPU: 1 PID: 5152 Comm: syz.0.24 Tainted: G W syzkaller #0 [ 81.243509][ T5152] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 81.245218][ T5152] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 81.246471][ T5152] pc : __btrfs_unlink_inode+0x904/0xaec [ 81.247452][ T5152] lr : __btrfs_unlink_inode+0x904/0xaec [ 81.248434][ T5152] sp : ffff8000206c7a60 [ 81.249125][ T5152] x29: ffff8000206c7b10 x28: ffff0000ccafe000 x27: ffff0000dd7f5410 [ 81.250544][ T5152] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000ccac4dc0 [ 81.251954][ T5152] x23: ffff7000040d8f54 x22: dfff800000000000 x21: ffff0000ed1c44b0 [ 81.253344][ T5152] x20: ffff0000df1b1c08 x19: 1fffe0001be36381 x18: 0000000000000001 [ 81.254725][ T5152] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 81.256073][ T5152] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 81.257398][ T5152] x11: 0000000000000000 x10: 0000000000000000 x9 : 26f5d3a9aab99b00 [ 81.258713][ T5152] x8 : 26f5d3a9aab99b00 x7 : 0000000000000001 x6 : 0000000000000001 [ 81.260034][ T5152] x5 : ffff8000206c7378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 81.261306][ T5152] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 81.262579][ T5152] Call trace: [ 81.263136][ T5152] __btrfs_unlink_inode+0x904/0xaec [ 81.263977][ T5152] btrfs_unlink+0x108/0x258 [ 81.264704][ T5152] vfs_unlink+0x2e0/0x4f4 [ 81.265347][ T5152] do_unlinkat+0x328/0x618 [ 81.265987][ T5152] __arm64_sys_unlinkat+0xe0/0xfc [ 81.266802][ T5152] invoke_syscall+0x98/0x2b0 [ 81.267604][ T5152] el0_svc_common+0x138/0x258 [ 81.268389][ T5152] do_el0_svc+0x58/0x13c [ 81.269082][ T5152] el0_svc+0x78/0x1d0 [ 81.269731][ T5152] el0t_64_sync_handler+0xcc/0xe4 [ 81.270572][ T5152] el0t_64_sync+0x1a0/0x1a4 [ 81.271308][ T5152] irq event stamp: 80410 [ 81.271983][ T5152] hardirqs last enabled at (80409): [] __up_console_sem+0xb4/0xfc [ 81.273502][ T5152] hardirqs last disabled at (80410): [] el1_dbg+0x24/0x80 [ 81.274964][ T5152] softirqs last enabled at (80390): [] handle_softirqs+0xa40/0xbe4 [ 81.276492][ T5152] softirqs last disabled at (80287): [] __irq_exit_rcu+0x240/0x43c [ 81.278023][ T5152] ---[ end trace 27e067890dc3976f ]--- [ 81.281128][ T5152] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 81.282749][ T5152] BTRFS info (device loop0): forced readonly [ 81.519769][ T5174] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.25 (5174) [ 81.524639][ T5174] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 81.526196][ T5174] BTRFS info (device loop0): using free space tree [ 81.527284][ T5174] BTRFS info (device loop0): has skinny extents [ 81.535911][ T5174] BTRFS info (device loop0): enabling ssd optimizations [ 81.540273][ T5174] FAULT_INJECTION: forcing a failure. [ 81.540273][ T5174] name failslab, interval 1, probability 0, space 0, times 0 [ 81.542386][ T5174] CPU: 1 PID: 5174 Comm: syz.0.25 Tainted: G W syzkaller #0 [ 81.543772][ T5174] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 81.545503][ T5174] Call trace: [ 81.546034][ T5174] dump_backtrace+0x0/0x458 [ 81.546782][ T5174] show_stack+0x2c/0x3c [ 81.547541][ T5174] __dump_stack+0x30/0x40 [ 81.548244][ T5174] dump_stack_lvl+0xf4/0x15c [ 81.549061][ T5174] dump_stack+0x1c/0x5c [ 81.549775][ T5174] should_fail+0x3bc/0x514 [ 81.550507][ T5174] __should_failslab+0xbc/0x10c [ 81.551371][ T5174] should_failslab+0x10/0x28 [ 81.552148][ T5174] slab_pre_alloc_hook+0x64/0xe8 [ 81.553030][ T5174] kmem_cache_alloc_trace+0x98/0x3ec [ 81.553885][ T5174] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 81.554916][ T5174] __btrfs_unlink_inode+0x350/0xaec [ 81.555772][ T5174] btrfs_unlink+0x108/0x258 [ 81.556536][ T5174] vfs_unlink+0x2e0/0x4f4 [ 81.557227][ T5174] do_unlinkat+0x328/0x618 [ 81.557910][ T5174] __arm64_sys_unlinkat+0xe0/0xfc [ 81.558743][ T5174] invoke_syscall+0x98/0x2b0 [ 81.559505][ T5174] el0_svc_common+0x138/0x258 [ 81.560312][ T5174] do_el0_svc+0x58/0x13c [ 81.560977][ T5174] el0_svc+0x78/0x1d0 [ 81.561669][ T5174] el0t_64_sync_handler+0xcc/0xe4 [ 81.562495][ T5174] el0t_64_sync+0x1a0/0x1a4 [ 81.566563][ T5174] ------------[ cut here ]------------ [ 81.567557][ T5174] WARNING: CPU: 1 PID: 5174 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 81.569187][ T5174] Modules linked in: [ 81.569851][ T5174] CPU: 1 PID: 5174 Comm: syz.0.25 Tainted: G W syzkaller #0 [ 81.571257][ T5174] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 81.572966][ T5174] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 81.574305][ T5174] pc : __btrfs_unlink_inode+0x904/0xaec [ 81.575152][ T5174] lr : __btrfs_unlink_inode+0x904/0xaec [ 81.576098][ T5174] sp : ffff800020707a60 [ 81.576804][ T5174] x29: ffff800020707b10 x28: ffff0000dce44000 x27: ffff0000dd7f5810 [ 81.578188][ T5174] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000dea23f20 [ 81.579581][ T5174] x23: ffff7000040e0f54 x22: dfff800000000000 x21: ffff0000ed1c6220 [ 81.581022][ T5174] x20: ffff0000df1b1d68 x19: 1fffe0001be363ad x18: 0000000000000001 [ 81.582403][ T5174] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 81.583735][ T5174] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 81.585077][ T5174] x11: 0000000000000000 x10: 0000000000000000 x9 : 7633349e8bd00d00 [ 81.586370][ T5174] x8 : 7633349e8bd00d00 x7 : 0000000000000001 x6 : 0000000000000001 [ 81.587784][ T5174] x5 : ffff800020707378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 81.589228][ T5174] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 81.590598][ T5174] Call trace: [ 81.591123][ T5174] __btrfs_unlink_inode+0x904/0xaec [ 81.591959][ T5174] btrfs_unlink+0x108/0x258 [ 81.592715][ T5174] vfs_unlink+0x2e0/0x4f4 [ 81.593467][ T5174] do_unlinkat+0x328/0x618 [ 81.594223][ T5174] __arm64_sys_unlinkat+0xe0/0xfc [ 81.595002][ T5174] invoke_syscall+0x98/0x2b0 [ 81.595772][ T5174] el0_svc_common+0x138/0x258 [ 81.596556][ T5174] do_el0_svc+0x58/0x13c [ 81.597249][ T5174] el0_svc+0x78/0x1d0 [ 81.597886][ T5174] el0t_64_sync_handler+0xcc/0xe4 [ 81.598673][ T5174] el0t_64_sync+0x1a0/0x1a4 [ 81.599405][ T5174] irq event stamp: 81288 [ 81.600126][ T5174] hardirqs last enabled at (81287): [] __up_console_sem+0xb4/0xfc [ 81.601728][ T5174] hardirqs last disabled at (81288): [] el1_dbg+0x24/0x80 [ 81.603190][ T5174] softirqs last enabled at (81268): [] handle_softirqs+0xa40/0xbe4 [ 81.604817][ T5174] softirqs last disabled at (81235): [] __irq_exit_rcu+0x240/0x43c [ 81.606405][ T5174] ---[ end trace 27e067890dc39770 ]--- [ 81.609837][ T5174] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 81.611314][ T5174] BTRFS info (device loop0): forced readonly [ 81.822527][ T5196] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.26 (5196) [ 81.830357][ T5196] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 81.832144][ T5196] BTRFS info (device loop0): using free space tree [ 81.837981][ T5196] BTRFS info (device loop0): has skinny extents [ 81.893357][ T5196] BTRFS info (device loop0): enabling ssd optimizations [ 81.897592][ T5196] FAULT_INJECTION: forcing a failure. [ 81.897592][ T5196] name failslab, interval 1, probability 0, space 0, times 0 [ 81.899640][ T5196] CPU: 1 PID: 5196 Comm: syz.0.26 Tainted: G W syzkaller #0 [ 81.901058][ T5196] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 81.902798][ T5196] Call trace: [ 81.903333][ T5196] dump_backtrace+0x0/0x458 [ 81.904075][ T5196] show_stack+0x2c/0x3c [ 81.904753][ T5196] __dump_stack+0x30/0x40 [ 81.905478][ T5196] dump_stack_lvl+0xf4/0x15c [ 81.906214][ T5196] dump_stack+0x1c/0x5c [ 81.906897][ T5196] should_fail+0x3bc/0x514 [ 81.907601][ T5196] __should_failslab+0xbc/0x10c [ 81.908491][ T5196] should_failslab+0x10/0x28 [ 81.909280][ T5196] slab_pre_alloc_hook+0x64/0xe8 [ 81.910121][ T5196] kmem_cache_alloc_trace+0x98/0x3ec [ 81.911095][ T5196] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 81.912084][ T5196] __btrfs_unlink_inode+0x350/0xaec [ 81.912956][ T5196] btrfs_unlink+0x108/0x258 [ 81.913698][ T5196] vfs_unlink+0x2e0/0x4f4 [ 81.914413][ T5196] do_unlinkat+0x328/0x618 [ 81.915133][ T5196] __arm64_sys_unlinkat+0xe0/0xfc [ 81.915987][ T5196] invoke_syscall+0x98/0x2b0 [ 81.916774][ T5196] el0_svc_common+0x138/0x258 [ 81.917572][ T5196] do_el0_svc+0x58/0x13c [ 81.918243][ T5196] el0_svc+0x78/0x1d0 [ 81.918874][ T5196] el0t_64_sync_handler+0xcc/0xe4 [ 81.919658][ T5196] el0t_64_sync+0x1a0/0x1a4 [ 81.953262][ T5196] ------------[ cut here ]------------ [ 81.954334][ T5196] WARNING: CPU: 1 PID: 5196 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 81.955849][ T5196] Modules linked in: [ 81.956511][ T5196] CPU: 1 PID: 5196 Comm: syz.0.26 Tainted: G W syzkaller #0 [ 81.957921][ T5196] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 81.959585][ T5196] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 81.960907][ T5196] pc : __btrfs_unlink_inode+0x904/0xaec [ 81.961843][ T5196] lr : __btrfs_unlink_inode+0x904/0xaec [ 81.962772][ T5196] sp : ffff8000206c7a60 [ 81.963470][ T5196] x29: ffff8000206c7b10 x28: ffff0000d16fa000 x27: ffff0000dd7f5c10 [ 81.964873][ T5196] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c22bec60 [ 81.966205][ T5196] x23: ffff7000040d8f54 x22: dfff800000000000 x21: ffff0000e2ec8000 [ 81.967501][ T5196] x20: ffff0000df1b1ec8 x19: 1fffe0001be363d9 x18: 0000000000000001 [ 81.968850][ T5196] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 81.970172][ T5196] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 81.971477][ T5196] x11: 0000000000000000 x10: 0000000000000000 x9 : 3d6760bf6b24ca00 [ 81.972765][ T5196] x8 : 3d6760bf6b24ca00 x7 : 0000000000000001 x6 : 0000000000000001 [ 81.974141][ T5196] x5 : ffff8000206c7378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 81.975498][ T5196] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 81.976833][ T5196] Call trace: [ 81.977383][ T5196] __btrfs_unlink_inode+0x904/0xaec [ 81.978274][ T5196] btrfs_unlink+0x108/0x258 [ 81.979044][ T5196] vfs_unlink+0x2e0/0x4f4 [ 81.979752][ T5196] do_unlinkat+0x328/0x618 [ 81.980469][ T5196] __arm64_sys_unlinkat+0xe0/0xfc [ 81.981318][ T5196] invoke_syscall+0x98/0x2b0 [ 81.982094][ T5196] el0_svc_common+0x138/0x258 [ 81.982858][ T5196] do_el0_svc+0x58/0x13c [ 81.983554][ T5196] el0_svc+0x78/0x1d0 [ 81.984243][ T5196] el0t_64_sync_handler+0xcc/0xe4 [ 81.985090][ T5196] el0t_64_sync+0x1a0/0x1a4 [ 81.985802][ T5196] irq event stamp: 80400 [ 81.986497][ T5196] hardirqs last enabled at (80399): [] __up_console_sem+0xb4/0xfc [ 81.988037][ T5196] hardirqs last disabled at (80400): [] el1_dbg+0x24/0x80 [ 81.989444][ T5196] softirqs last enabled at (80376): [] handle_softirqs+0xa40/0xbe4 [ 81.991053][ T5196] softirqs last disabled at (80353): [] __irq_exit_rcu+0x240/0x43c [ 81.992608][ T5196] ---[ end trace 27e067890dc39771 ]--- [ 81.996030][ T5196] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 81.997610][ T5196] BTRFS info (device loop0): forced readonly [ 82.252232][ T5218] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.27 (5218) [ 82.259427][ T5218] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 82.261259][ T5218] BTRFS info (device loop0): using free space tree [ 82.262350][ T5218] BTRFS info (device loop0): has skinny extents [ 82.277739][ T5218] BTRFS info (device loop0): enabling ssd optimizations [ 82.283673][ T5218] FAULT_INJECTION: forcing a failure. [ 82.283673][ T5218] name failslab, interval 1, probability 0, space 0, times 0 [ 82.285892][ T5218] CPU: 1 PID: 5218 Comm: syz.0.27 Tainted: G W syzkaller #0 [ 82.287310][ T5218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 82.289008][ T5218] Call trace: [ 82.289534][ T5218] dump_backtrace+0x0/0x458 [ 82.290258][ T5218] show_stack+0x2c/0x3c [ 82.290982][ T5218] __dump_stack+0x30/0x40 [ 82.291659][ T5218] dump_stack_lvl+0xf4/0x15c [ 82.292530][ T5218] dump_stack+0x1c/0x5c [ 82.293195][ T5218] should_fail+0x3bc/0x514 [ 82.293923][ T5218] __should_failslab+0xbc/0x10c [ 82.294720][ T5218] should_failslab+0x10/0x28 [ 82.295528][ T5218] slab_pre_alloc_hook+0x64/0xe8 [ 82.296345][ T5218] kmem_cache_alloc_trace+0x98/0x3ec [ 82.297242][ T5218] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 82.298268][ T5218] __btrfs_unlink_inode+0x350/0xaec [ 82.299085][ T5218] btrfs_unlink+0x108/0x258 [ 82.299931][ T5218] vfs_unlink+0x2e0/0x4f4 [ 82.300652][ T5218] do_unlinkat+0x328/0x618 [ 82.301433][ T5218] __arm64_sys_unlinkat+0xe0/0xfc [ 82.302268][ T5218] invoke_syscall+0x98/0x2b0 [ 82.303022][ T5218] el0_svc_common+0x138/0x258 [ 82.303864][ T5218] do_el0_svc+0x58/0x13c [ 82.304592][ T5218] el0_svc+0x78/0x1d0 [ 82.305259][ T5218] el0t_64_sync_handler+0xcc/0xe4 [ 82.306151][ T5218] el0t_64_sync+0x1a0/0x1a4 [ 82.309061][ T5218] ------------[ cut here ]------------ [ 82.310053][ T5218] WARNING: CPU: 1 PID: 5218 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 82.311629][ T5218] Modules linked in: [ 82.312288][ T5218] CPU: 1 PID: 5218 Comm: syz.0.27 Tainted: G W syzkaller #0 [ 82.313776][ T5218] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 82.315441][ T5218] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 82.316771][ T5218] pc : __btrfs_unlink_inode+0x904/0xaec [ 82.317719][ T5218] lr : __btrfs_unlink_inode+0x904/0xaec [ 82.318605][ T5218] sp : ffff800020b17a60 [ 82.319300][ T5218] x29: ffff800020b17b10 x28: ffff0000d9c7e000 x27: ffff0000dd7f6010 [ 82.320554][ T5218] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000ca05e420 [ 82.321888][ T5218] x23: ffff700004162f54 x22: dfff800000000000 x21: ffff0000e2eca740 [ 82.323221][ T5218] x20: ffff0000df1b1058 x19: 1fffe0001be3620b x18: 0000000000000001 [ 82.324563][ T5218] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 82.326051][ T5218] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 82.327355][ T5218] x11: 0000000000000000 x10: 0000000000000000 x9 : 43664bf00d1a1e00 [ 82.328727][ T5218] x8 : 43664bf00d1a1e00 x7 : 0000000000000001 x6 : 0000000000000001 [ 82.330037][ T5218] x5 : ffff800020b17378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 82.331353][ T5218] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 82.332637][ T5218] Call trace: [ 82.333139][ T5218] __btrfs_unlink_inode+0x904/0xaec [ 82.333983][ T5218] btrfs_unlink+0x108/0x258 [ 82.334743][ T5218] vfs_unlink+0x2e0/0x4f4 [ 82.335485][ T5218] do_unlinkat+0x328/0x618 [ 82.336215][ T5218] __arm64_sys_unlinkat+0xe0/0xfc [ 82.337041][ T5218] invoke_syscall+0x98/0x2b0 [ 82.337840][ T5218] el0_svc_common+0x138/0x258 [ 82.338622][ T5218] do_el0_svc+0x58/0x13c [ 82.339374][ T5218] el0_svc+0x78/0x1d0 [ 82.340058][ T5218] el0t_64_sync_handler+0xcc/0xe4 [ 82.340905][ T5218] el0t_64_sync+0x1a0/0x1a4 [ 82.341648][ T5218] irq event stamp: 81306 [ 82.342314][ T5218] hardirqs last enabled at (81305): [] __up_console_sem+0xb4/0xfc [ 82.343808][ T5218] hardirqs last disabled at (81306): [] el1_dbg+0x24/0x80 [ 82.345179][ T5218] softirqs last enabled at (81286): [] handle_softirqs+0xa40/0xbe4 [ 82.346708][ T5218] softirqs last disabled at (81267): [] __irq_exit_rcu+0x240/0x43c [ 82.348235][ T5218] ---[ end trace 27e067890dc39772 ]--- [ 82.352172][ T5218] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 82.353763][ T5218] BTRFS info (device loop0): forced readonly [ 82.544093][ T5240] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.28 (5240) [ 82.585633][ T5240] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 82.587259][ T5240] BTRFS info (device loop0): using free space tree [ 82.588376][ T5240] BTRFS info (device loop0): has skinny extents [ 82.596011][ T5240] BTRFS info (device loop0): enabling ssd optimizations [ 82.600934][ T5240] FAULT_INJECTION: forcing a failure. [ 82.600934][ T5240] name failslab, interval 1, probability 0, space 0, times 0 [ 82.603820][ T5240] CPU: 0 PID: 5240 Comm: syz.0.28 Tainted: G W syzkaller #0 [ 82.605166][ T5240] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 82.606800][ T5240] Call trace: [ 82.607315][ T5240] dump_backtrace+0x0/0x458 [ 82.608008][ T5240] show_stack+0x2c/0x3c [ 82.608646][ T5240] __dump_stack+0x30/0x40 [ 82.609341][ T5240] dump_stack_lvl+0xf4/0x15c [ 82.610104][ T5240] dump_stack+0x1c/0x5c [ 82.610781][ T5240] should_fail+0x3bc/0x514 [ 82.611494][ T5240] __should_failslab+0xbc/0x10c [ 82.612302][ T5240] should_failslab+0x10/0x28 [ 82.613082][ T5240] slab_pre_alloc_hook+0x64/0xe8 [ 82.613876][ T5240] kmem_cache_alloc_trace+0x98/0x3ec [ 82.614778][ T5240] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 82.615743][ T5240] __btrfs_unlink_inode+0x350/0xaec [ 82.616550][ T5240] btrfs_unlink+0x108/0x258 [ 82.617296][ T5240] vfs_unlink+0x2e0/0x4f4 [ 82.617993][ T5240] do_unlinkat+0x328/0x618 [ 82.618750][ T5240] __arm64_sys_unlinkat+0xe0/0xfc [ 82.619560][ T5240] invoke_syscall+0x98/0x2b0 [ 82.620317][ T5240] el0_svc_common+0x138/0x258 [ 82.621115][ T5240] do_el0_svc+0x58/0x13c [ 82.621853][ T5240] el0_svc+0x78/0x1d0 [ 82.622506][ T5240] el0t_64_sync_handler+0xcc/0xe4 [ 82.623348][ T5240] el0t_64_sync+0x1a0/0x1a4 [ 82.624996][ T5240] ------------[ cut here ]------------ [ 82.625971][ T5240] WARNING: CPU: 0 PID: 5240 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 82.627530][ T5240] Modules linked in: [ 82.628234][ T5240] CPU: 0 PID: 5240 Comm: syz.0.28 Tainted: G W syzkaller #0 [ 82.629653][ T5240] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 82.631311][ T5240] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 82.632634][ T5240] pc : __btrfs_unlink_inode+0x904/0xaec [ 82.633577][ T5240] lr : __btrfs_unlink_inode+0x904/0xaec [ 82.634483][ T5240] sp : ffff800020b17a60 [ 82.635158][ T5240] x29: ffff800020b17b10 x28: ffff0000c9388000 x27: ffff0000e2e54010 [ 82.636540][ T5240] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d4c93580 [ 82.637866][ T5240] x23: ffff700004162f54 x22: dfff800000000000 x21: ffff0000e2f45850 [ 82.639241][ T5240] x20: ffff0000df2e0058 x19: 1fffe0001be5c00b x18: 0000000000000001 [ 82.640580][ T5240] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 82.641954][ T5240] x14: 0000000000000001 x13: 1fffe000341f05ab x12: 0000000000ff0100 [ 82.643326][ T5240] x11: 0000000000000000 x10: 0000000000000000 x9 : bfdfb110736d9b00 [ 82.644697][ T5240] x8 : bfdfb110736d9b00 x7 : 0000000000000001 x6 : 0000000000000001 [ 82.646044][ T5240] x5 : ffff800020b17378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 82.647435][ T5240] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 82.648927][ T5240] Call trace: [ 82.649462][ T5240] __btrfs_unlink_inode+0x904/0xaec [ 82.650326][ T5240] btrfs_unlink+0x108/0x258 [ 82.651115][ T5240] vfs_unlink+0x2e0/0x4f4 [ 82.651879][ T5240] do_unlinkat+0x328/0x618 [ 82.652613][ T5240] __arm64_sys_unlinkat+0xe0/0xfc [ 82.653521][ T5240] invoke_syscall+0x98/0x2b0 [ 82.654263][ T5240] el0_svc_common+0x138/0x258 [ 82.655061][ T5240] do_el0_svc+0x58/0x13c [ 82.655732][ T5240] el0_svc+0x78/0x1d0 [ 82.656373][ T5240] el0t_64_sync_handler+0xcc/0xe4 [ 82.657354][ T5240] el0t_64_sync+0x1a0/0x1a4 [ 82.658141][ T5240] irq event stamp: 79758 [ 82.658847][ T5240] hardirqs last enabled at (79757): [] __up_console_sem+0xb4/0xfc [ 82.660372][ T5240] hardirqs last disabled at (79758): [] el1_dbg+0x24/0x80 [ 82.661768][ T5240] softirqs last enabled at (79738): [] handle_softirqs+0xa40/0xbe4 [ 82.663389][ T5240] softirqs last disabled at (79691): [] __irq_exit_rcu+0x240/0x43c [ 82.664886][ T5240] ---[ end trace 27e067890dc39773 ]--- [ 82.666245][ T5240] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 82.667831][ T5240] BTRFS info (device loop0): forced readonly [ 82.868345][ T5262] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.29 (5262) [ 82.872895][ T5262] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 82.874475][ T5262] BTRFS info (device loop0): using free space tree [ 82.875657][ T5262] BTRFS info (device loop0): has skinny extents [ 82.889790][ T5262] BTRFS info (device loop0): enabling ssd optimizations [ 82.894561][ T5262] FAULT_INJECTION: forcing a failure. [ 82.894561][ T5262] name failslab, interval 1, probability 0, space 0, times 0 [ 82.896758][ T5262] CPU: 1 PID: 5262 Comm: syz.0.29 Tainted: G W syzkaller #0 [ 82.898211][ T5262] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 82.899934][ T5262] Call trace: [ 82.900530][ T5262] dump_backtrace+0x0/0x458 [ 82.901305][ T5262] show_stack+0x2c/0x3c [ 82.902017][ T5262] __dump_stack+0x30/0x40 [ 82.902694][ T5262] dump_stack_lvl+0xf4/0x15c [ 82.903485][ T5262] dump_stack+0x1c/0x5c [ 82.904186][ T5262] should_fail+0x3bc/0x514 [ 82.904947][ T5262] __should_failslab+0xbc/0x10c [ 82.905716][ T5262] should_failslab+0x10/0x28 [ 82.906546][ T5262] slab_pre_alloc_hook+0x64/0xe8 [ 82.907357][ T5262] kmem_cache_alloc+0x94/0x3d4 [ 82.908228][ T5262] btrfs_alloc_path+0x5c/0x68 [ 82.909033][ T5262] __btrfs_unlink_inode+0x1dc/0xaec [ 82.909953][ T5262] btrfs_unlink+0x108/0x258 [ 82.910717][ T5262] vfs_unlink+0x2e0/0x4f4 [ 82.911426][ T5262] do_unlinkat+0x328/0x618 [ 82.912171][ T5262] __arm64_sys_unlinkat+0xe0/0xfc [ 82.912953][ T5262] invoke_syscall+0x98/0x2b0 [ 82.913716][ T5262] el0_svc_common+0x138/0x258 [ 82.914457][ T5262] do_el0_svc+0x58/0x13c [ 82.915186][ T5262] el0_svc+0x78/0x1d0 [ 82.915829][ T5262] el0t_64_sync_handler+0xcc/0xe4 [ 82.916674][ T5262] el0t_64_sync+0x1a0/0x1a4 [ 83.138153][ T5284] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.30 (5284) [ 83.143510][ T5284] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 83.145046][ T5284] BTRFS info (device loop0): using free space tree [ 83.146101][ T5284] BTRFS info (device loop0): has skinny extents [ 83.154425][ T5284] BTRFS info (device loop0): enabling ssd optimizations [ 83.159553][ T5284] FAULT_INJECTION: forcing a failure. [ 83.159553][ T5284] name failslab, interval 1, probability 0, space 0, times 0 [ 83.161706][ T5284] CPU: 1 PID: 5284 Comm: syz.0.30 Tainted: G W syzkaller #0 [ 83.163297][ T5284] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 83.165056][ T5284] Call trace: [ 83.165647][ T5284] dump_backtrace+0x0/0x458 [ 83.166419][ T5284] show_stack+0x2c/0x3c [ 83.167148][ T5284] __dump_stack+0x30/0x40 [ 83.167887][ T5284] dump_stack_lvl+0xf4/0x15c [ 83.168685][ T5284] dump_stack+0x1c/0x5c [ 83.169418][ T5284] should_fail+0x3bc/0x514 [ 83.170152][ T5284] __should_failslab+0xbc/0x10c [ 83.171003][ T5284] should_failslab+0x10/0x28 [ 83.171785][ T5284] slab_pre_alloc_hook+0x64/0xe8 [ 83.172649][ T5284] kmem_cache_alloc+0x94/0x3d4 [ 83.173409][ T5284] btrfs_alloc_path+0x5c/0x68 [ 83.174203][ T5284] __btrfs_unlink_inode+0x1dc/0xaec [ 83.175060][ T5284] btrfs_unlink+0x108/0x258 [ 83.175807][ T5284] vfs_unlink+0x2e0/0x4f4 [ 83.176488][ T5284] do_unlinkat+0x328/0x618 [ 83.177218][ T5284] __arm64_sys_unlinkat+0xe0/0xfc [ 83.178060][ T5284] invoke_syscall+0x98/0x2b0 [ 83.178869][ T5284] el0_svc_common+0x138/0x258 [ 83.179694][ T5284] do_el0_svc+0x58/0x13c [ 83.180446][ T5284] el0_svc+0x78/0x1d0 [ 83.181110][ T5284] el0t_64_sync_handler+0xcc/0xe4 [ 83.181974][ T5284] el0t_64_sync+0x1a0/0x1a4 [ 83.236952][ T4524] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 10 /dev/loop0 scanned by udevd (4524) [ 83.376573][ T5305] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 83.378149][ T5305] BTRFS info (device loop0): using free space tree [ 83.379218][ T5305] BTRFS info (device loop0): has skinny extents [ 83.390764][ T5305] BTRFS info (device loop0): enabling ssd optimizations [ 83.396400][ T5305] FAULT_INJECTION: forcing a failure. [ 83.396400][ T5305] name failslab, interval 1, probability 0, space 0, times 0 [ 83.398583][ T5305] CPU: 1 PID: 5305 Comm: syz.0.31 Tainted: G W syzkaller #0 [ 83.399855][ T5305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 83.401358][ T5305] Call trace: [ 83.401895][ T5305] dump_backtrace+0x0/0x458 [ 83.402664][ T5305] show_stack+0x2c/0x3c [ 83.403391][ T5305] __dump_stack+0x30/0x40 [ 83.404122][ T5305] dump_stack_lvl+0xf4/0x15c [ 83.404889][ T5305] dump_stack+0x1c/0x5c [ 83.405588][ T5305] should_fail+0x3bc/0x514 [ 83.406328][ T5305] __should_failslab+0xbc/0x10c [ 83.407094][ T5305] should_failslab+0x10/0x28 [ 83.407874][ T5305] slab_pre_alloc_hook+0x64/0xe8 [ 83.408730][ T5305] kmem_cache_alloc_trace+0x98/0x3ec [ 83.409630][ T5305] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 83.410653][ T5305] __btrfs_unlink_inode+0x350/0xaec [ 83.411521][ T5305] btrfs_unlink+0x108/0x258 [ 83.412274][ T5305] vfs_unlink+0x2e0/0x4f4 [ 83.412954][ T5305] do_unlinkat+0x328/0x618 [ 83.413676][ T5305] __arm64_sys_unlinkat+0xe0/0xfc [ 83.414563][ T5305] invoke_syscall+0x98/0x2b0 [ 83.415208][ T5305] el0_svc_common+0x138/0x258 [ 83.415923][ T5305] do_el0_svc+0x58/0x13c [ 83.416600][ T5305] el0_svc+0x78/0x1d0 [ 83.417232][ T5305] el0t_64_sync_handler+0xcc/0xe4 [ 83.418075][ T5305] el0t_64_sync+0x1a0/0x1a4 [ 83.419150][ T5305] ------------[ cut here ]------------ [ 83.420187][ T5305] WARNING: CPU: 1 PID: 5305 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 83.421741][ T5305] Modules linked in: [ 83.422421][ T5305] CPU: 1 PID: 5305 Comm: syz.0.31 Tainted: G W syzkaller #0 [ 83.423805][ T5305] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 83.425490][ T5305] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 83.426780][ T5305] pc : __btrfs_unlink_inode+0x904/0xaec [ 83.427722][ T5305] lr : __btrfs_unlink_inode+0x904/0xaec [ 83.428571][ T5305] sp : ffff8000212f7a60 [ 83.429180][ T5305] x29: ffff8000212f7b10 x28: ffff0000dac98000 x27: ffff0000dd7f6c10 [ 83.430508][ T5305] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d20c2e70 [ 83.431860][ T5305] x23: ffff70000425ef54 x22: dfff800000000000 x21: ffff0000e2eb89d0 [ 83.433167][ T5305] x20: ffff0000dd627268 x19: 1fffe0001bac4e4d x18: 0000000000000001 [ 83.434532][ T5305] x17: 0000000000000000 x16: ffff800008304c04 x15: 00000000ffffffff [ 83.435905][ T5305] x14: 0000000000000001 x13: 1ffff0000425ee6c x12: 0000000000ff0100 [ 83.437274][ T5305] x11: 0000000000000000 x10: 0000000000000000 x9 : bc953e2f9a96ca00 [ 83.438686][ T5305] x8 : bc953e2f9a96ca00 x7 : 0000000000000001 x6 : 0000000000000001 [ 83.440103][ T5305] x5 : ffff8000212f7378 x4 : ffff80001437f3e0 x3 : ffff800008304d14 [ 83.441460][ T5305] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 83.442807][ T5305] Call trace: [ 83.443364][ T5305] __btrfs_unlink_inode+0x904/0xaec [ 83.444189][ T5305] btrfs_unlink+0x108/0x258 [ 83.444968][ T5305] vfs_unlink+0x2e0/0x4f4 [ 83.445698][ T5305] do_unlinkat+0x328/0x618 [ 83.446446][ T5305] __arm64_sys_unlinkat+0xe0/0xfc [ 83.447293][ T5305] invoke_syscall+0x98/0x2b0 [ 83.448073][ T5305] el0_svc_common+0x138/0x258 [ 83.448834][ T5305] do_el0_svc+0x58/0x13c [ 83.449536][ T5305] el0_svc+0x78/0x1d0 [ 83.450217][ T5305] el0t_64_sync_handler+0xcc/0xe4 [ 83.451027][ T5305] el0t_64_sync+0x1a0/0x1a4 [ 83.451760][ T5305] irq event stamp: 80064 [ 83.452496][ T5305] hardirqs last enabled at (80063): [] __up_console_sem+0xb4/0xfc [ 83.454179][ T5305] hardirqs last disabled at (80064): [] el1_dbg+0x24/0x80 [ 83.455620][ T5305] softirqs last enabled at (80044): [] handle_softirqs+0xa40/0xbe4 [ 83.457196][ T5305] softirqs last disabled at (79985): [] __irq_exit_rcu+0x240/0x43c [ 83.458857][ T5305] ---[ end trace 27e067890dc39774 ]--- [ 83.460302][ T5305] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 83.461982][ T5305] BTRFS info (device loop0): forced readonly 1970/01/01 00:01:23 executed programs: 19 [ 83.600040][ T5328] set_capacity_and_notify: 7 callbacks suppressed [ 83.600049][ T5328] loop0: detected capacity change from 0 to 32768 [ 83.646206][ T5328] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.32 (5328) [ 83.649711][ T5328] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 83.651205][ T5328] BTRFS info (device loop0): using free space tree [ 83.652378][ T5328] BTRFS info (device loop0): has skinny extents [ 83.660193][ T5328] BTRFS info (device loop0): enabling ssd optimizations [ 83.666701][ T5328] FAULT_INJECTION: forcing a failure. [ 83.666701][ T5328] name failslab, interval 1, probability 0, space 0, times 0 [ 83.669086][ T5328] CPU: 0 PID: 5328 Comm: syz.0.32 Tainted: G W syzkaller #0 [ 83.670514][ T5328] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 83.672150][ T5328] Call trace: [ 83.672670][ T5328] dump_backtrace+0x0/0x458 [ 83.673439][ T5328] show_stack+0x2c/0x3c [ 83.674251][ T5328] __dump_stack+0x30/0x40 [ 83.674999][ T5328] dump_stack_lvl+0xf4/0x15c [ 83.675818][ T5328] dump_stack+0x1c/0x5c [ 83.676590][ T5328] should_fail+0x3bc/0x514 [ 83.677324][ T5328] __should_failslab+0xbc/0x10c [ 83.678170][ T5328] should_failslab+0x10/0x28 [ 83.678929][ T5328] slab_pre_alloc_hook+0x64/0xe8 [ 83.679809][ T5328] kmem_cache_alloc_trace+0x98/0x3ec [ 83.680728][ T5328] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 83.681762][ T5328] __btrfs_unlink_inode+0x350/0xaec [ 83.682621][ T5328] btrfs_unlink+0x108/0x258 [ 83.683359][ T5328] vfs_unlink+0x2e0/0x4f4 [ 83.684108][ T5328] do_unlinkat+0x328/0x618 [ 83.684890][ T5328] __arm64_sys_unlinkat+0xe0/0xfc [ 83.685768][ T5328] invoke_syscall+0x98/0x2b0 [ 83.686561][ T5328] el0_svc_common+0x138/0x258 [ 83.687342][ T5328] do_el0_svc+0x58/0x13c [ 83.688019][ T5328] el0_svc+0x78/0x1d0 [ 83.688698][ T5328] el0t_64_sync_handler+0xcc/0xe4 [ 83.689478][ T5328] el0t_64_sync+0x1a0/0x1a4 [ 83.692505][ T5328] ------------[ cut here ]------------ [ 83.693695][ T5328] WARNING: CPU: 0 PID: 5328 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 83.695114][ T5328] Modules linked in: [ 83.695729][ T5328] CPU: 0 PID: 5328 Comm: syz.0.32 Tainted: G W syzkaller #0 [ 83.697184][ T5328] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 83.698922][ T5328] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 83.700260][ T5328] pc : __btrfs_unlink_inode+0x904/0xaec [ 83.701185][ T5328] lr : __btrfs_unlink_inode+0x904/0xaec [ 83.702038][ T5328] sp : ffff800021547a60 [ 83.702762][ T5328] x29: ffff800021547b10 x28: ffff0000dc146000 x27: ffff0000e2e55010 [ 83.704052][ T5328] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000ecd95bb0 [ 83.705399][ T5328] x23: ffff7000042a8f54 x22: dfff800000000000 x21: ffff0000ed11e220 [ 83.706791][ T5328] x20: ffff0000df2e0898 x19: 1fffe0001be5c113 x18: 0000000000000001 [ 83.708213][ T5328] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 83.709569][ T5328] x14: 0000000000000001 x13: 1fffe000341f05ab x12: 0000000000ff0100 [ 83.710927][ T5328] x11: 0000000000000000 x10: 0000000000000000 x9 : ea886bc80e5b7f00 [ 83.712322][ T5328] x8 : ea886bc80e5b7f00 x7 : 0000000000000001 x6 : 0000000000000001 [ 83.713656][ T5328] x5 : ffff800021547378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 83.714990][ T5328] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 83.716415][ T5328] Call trace: [ 83.716997][ T5328] __btrfs_unlink_inode+0x904/0xaec [ 83.717845][ T5328] btrfs_unlink+0x108/0x258 [ 83.718651][ T5328] vfs_unlink+0x2e0/0x4f4 [ 83.719413][ T5328] do_unlinkat+0x328/0x618 [ 83.720179][ T5328] __arm64_sys_unlinkat+0xe0/0xfc [ 83.720985][ T5328] invoke_syscall+0x98/0x2b0 [ 83.721800][ T5328] el0_svc_common+0x138/0x258 [ 83.722588][ T5328] do_el0_svc+0x58/0x13c [ 83.723326][ T5328] el0_svc+0x78/0x1d0 [ 83.724042][ T5328] el0t_64_sync_handler+0xcc/0xe4 [ 83.724982][ T5328] el0t_64_sync+0x1a0/0x1a4 [ 83.725729][ T5328] irq event stamp: 81212 [ 83.726420][ T5328] hardirqs last enabled at (81211): [] __up_console_sem+0xb4/0xfc [ 83.728090][ T5328] hardirqs last disabled at (81212): [] el1_dbg+0x24/0x80 [ 83.729615][ T5328] softirqs last enabled at (81200): [] handle_softirqs+0xa40/0xbe4 [ 83.731199][ T5328] softirqs last disabled at (81177): [] __irq_exit_rcu+0x240/0x43c [ 83.732804][ T5328] ---[ end trace 27e067890dc39775 ]--- [ 83.735787][ T5328] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 83.737485][ T5328] BTRFS info (device loop0): forced readonly [ 83.874852][ T5350] loop0: detected capacity change from 0 to 32768 [ 83.914874][ T5350] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.33 (5350) [ 83.956008][ T5350] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 83.957662][ T5350] BTRFS info (device loop0): using free space tree [ 83.958769][ T5350] BTRFS info (device loop0): has skinny extents [ 83.966909][ T5350] BTRFS info (device loop0): enabling ssd optimizations [ 83.970986][ T5350] FAULT_INJECTION: forcing a failure. [ 83.970986][ T5350] name failslab, interval 1, probability 0, space 0, times 0 [ 83.974219][ T5350] CPU: 0 PID: 5350 Comm: syz.0.33 Tainted: G W syzkaller #0 [ 83.975702][ T5350] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 83.977380][ T5350] Call trace: [ 83.977878][ T5350] dump_backtrace+0x0/0x458 [ 83.978664][ T5350] show_stack+0x2c/0x3c [ 83.979311][ T5350] __dump_stack+0x30/0x40 [ 83.980035][ T5350] dump_stack_lvl+0xf4/0x15c [ 83.980806][ T5350] dump_stack+0x1c/0x5c [ 83.981509][ T5350] should_fail+0x3bc/0x514 [ 83.982342][ T5350] __should_failslab+0xbc/0x10c [ 83.983215][ T5350] should_failslab+0x10/0x28 [ 83.984021][ T5350] slab_pre_alloc_hook+0x64/0xe8 [ 83.984840][ T5350] kmem_cache_alloc_trace+0x98/0x3ec [ 83.985811][ T5350] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 83.986863][ T5350] __btrfs_unlink_inode+0x350/0xaec [ 83.987806][ T5350] btrfs_unlink+0x108/0x258 [ 83.988583][ T5350] vfs_unlink+0x2e0/0x4f4 [ 83.989336][ T5350] do_unlinkat+0x328/0x618 [ 83.990081][ T5350] __arm64_sys_unlinkat+0xe0/0xfc [ 83.990939][ T5350] invoke_syscall+0x98/0x2b0 [ 83.991725][ T5350] el0_svc_common+0x138/0x258 [ 83.992564][ T5350] do_el0_svc+0x58/0x13c [ 83.993292][ T5350] el0_svc+0x78/0x1d0 [ 83.993970][ T5350] el0t_64_sync_handler+0xcc/0xe4 [ 83.994815][ T5350] el0t_64_sync+0x1a0/0x1a4 [ 83.998252][ T5350] ------------[ cut here ]------------ [ 83.999320][ T5350] WARNING: CPU: 0 PID: 5350 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 84.000751][ T5350] Modules linked in: [ 84.001374][ T5350] CPU: 0 PID: 5350 Comm: syz.0.33 Tainted: G W syzkaller #0 [ 84.002775][ T5350] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 84.004417][ T5350] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 84.005722][ T5350] pc : __btrfs_unlink_inode+0x904/0xaec [ 84.006679][ T5350] lr : __btrfs_unlink_inode+0x904/0xaec [ 84.007579][ T5350] sp : ffff8000212f7a60 [ 84.008281][ T5350] x29: ffff8000212f7b10 x28: ffff0000d3f0a000 x27: ffff0000e2e55410 [ 84.009684][ T5350] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d3f6f2c0 [ 84.011004][ T5350] x23: ffff70000425ef54 x22: dfff800000000000 x21: ffff0000ed11ce80 [ 84.012350][ T5350] x20: ffff0000df2e0948 x19: 1fffe0001be5c129 x18: 0000000000000001 [ 84.013695][ T5350] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 84.015081][ T5350] x14: 0000000000000001 x13: 1fffe000341f05ab x12: 0000000000ff0100 [ 84.016444][ T5350] x11: 0000000000000000 x10: 0000000000000000 x9 : f4dbc39d3fbccc00 [ 84.017783][ T5350] x8 : f4dbc39d3fbccc00 x7 : 0000000000000001 x6 : 0000000000000001 [ 84.019103][ T5350] x5 : ffff8000212f7378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 84.020551][ T5350] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 84.021907][ T5350] Call trace: [ 84.022425][ T5350] __btrfs_unlink_inode+0x904/0xaec [ 84.023278][ T5350] btrfs_unlink+0x108/0x258 [ 84.024134][ T5350] vfs_unlink+0x2e0/0x4f4 [ 84.024828][ T5350] do_unlinkat+0x328/0x618 [ 84.025663][ T5350] __arm64_sys_unlinkat+0xe0/0xfc [ 84.026524][ T5350] invoke_syscall+0x98/0x2b0 [ 84.027328][ T5350] el0_svc_common+0x138/0x258 [ 84.028125][ T5350] do_el0_svc+0x58/0x13c [ 84.028809][ T5350] el0_svc+0x78/0x1d0 [ 84.029440][ T5350] el0t_64_sync_handler+0xcc/0xe4 [ 84.030267][ T5350] el0t_64_sync+0x1a0/0x1a4 [ 84.031014][ T5350] irq event stamp: 80602 [ 84.031723][ T5350] hardirqs last enabled at (80601): [] __up_console_sem+0xb4/0xfc [ 84.033267][ T5350] hardirqs last disabled at (80602): [] el1_dbg+0x24/0x80 [ 84.034778][ T5350] softirqs last enabled at (80582): [] handle_softirqs+0xa40/0xbe4 [ 84.036395][ T5350] softirqs last disabled at (80499): [] __irq_exit_rcu+0x240/0x43c [ 84.037988][ T5350] ---[ end trace 27e067890dc39776 ]--- [ 84.041251][ T5350] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 84.042881][ T5350] BTRFS info (device loop0): forced readonly [ 84.227426][ T5372] loop0: detected capacity change from 0 to 32768 [ 84.279079][ T5372] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.34 (5372) [ 84.284919][ T5372] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 84.286514][ T5372] BTRFS info (device loop0): using free space tree [ 84.287746][ T5372] BTRFS info (device loop0): has skinny extents [ 84.298655][ T5372] BTRFS info (device loop0): enabling ssd optimizations [ 84.305435][ T5372] FAULT_INJECTION: forcing a failure. [ 84.305435][ T5372] name failslab, interval 1, probability 0, space 0, times 0 [ 84.307550][ T5372] CPU: 1 PID: 5372 Comm: syz.0.34 Tainted: G W syzkaller #0 [ 84.309063][ T5372] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 84.310766][ T5372] Call trace: [ 84.311308][ T5372] dump_backtrace+0x0/0x458 [ 84.312009][ T5372] show_stack+0x2c/0x3c [ 84.312687][ T5372] __dump_stack+0x30/0x40 [ 84.313420][ T5372] dump_stack_lvl+0xf4/0x15c [ 84.314181][ T5372] dump_stack+0x1c/0x5c [ 84.314881][ T5372] should_fail+0x3bc/0x514 [ 84.315621][ T5372] __should_failslab+0xbc/0x10c [ 84.316441][ T5372] should_failslab+0x10/0x28 [ 84.317209][ T5372] slab_pre_alloc_hook+0x64/0xe8 [ 84.318006][ T5372] kmem_cache_alloc_trace+0x98/0x3ec [ 84.318864][ T5372] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 84.319883][ T5372] __btrfs_unlink_inode+0x350/0xaec [ 84.320786][ T5372] btrfs_unlink+0x108/0x258 [ 84.321533][ T5372] vfs_unlink+0x2e0/0x4f4 [ 84.322245][ T5372] do_unlinkat+0x328/0x618 [ 84.322958][ T5372] __arm64_sys_unlinkat+0xe0/0xfc [ 84.323793][ T5372] invoke_syscall+0x98/0x2b0 [ 84.324574][ T5372] el0_svc_common+0x138/0x258 [ 84.325363][ T5372] do_el0_svc+0x58/0x13c [ 84.326092][ T5372] el0_svc+0x78/0x1d0 [ 84.326769][ T5372] el0t_64_sync_handler+0xcc/0xe4 [ 84.327630][ T5372] el0t_64_sync+0x1a0/0x1a4 [ 84.330017][ T5372] ------------[ cut here ]------------ [ 84.331009][ T5372] WARNING: CPU: 1 PID: 5372 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 84.332573][ T5372] Modules linked in: [ 84.333234][ T5372] CPU: 1 PID: 5372 Comm: syz.0.34 Tainted: G W syzkaller #0 [ 84.334696][ T5372] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 84.336424][ T5372] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 84.337773][ T5372] pc : __btrfs_unlink_inode+0x904/0xaec [ 84.338671][ T5372] lr : __btrfs_unlink_inode+0x904/0xaec [ 84.339593][ T5372] sp : ffff800021767a60 [ 84.340296][ T5372] x29: ffff800021767b10 x28: ffff0000d56c2000 x27: ffff0000e2e55810 [ 84.341634][ T5372] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000eee53b00 [ 84.342941][ T5372] x23: ffff7000042ecf54 x22: dfff800000000000 x21: ffff0000ed1189d0 [ 84.344253][ T5372] x20: ffff0000dd627318 x19: 1fffe0001bac4e63 x18: 0000000000000001 [ 84.345571][ T5372] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 84.346929][ T5372] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 84.348249][ T5372] x11: 0000000000000000 x10: 0000000000000000 x9 : b0cd936b7c093400 [ 84.349622][ T5372] x8 : b0cd936b7c093400 x7 : 0000000000000001 x6 : 0000000000000001 [ 84.350982][ T5372] x5 : ffff800021767378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 84.352368][ T5372] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 84.353718][ T5372] Call trace: [ 84.354269][ T5372] __btrfs_unlink_inode+0x904/0xaec [ 84.355286][ T5372] btrfs_unlink+0x108/0x258 [ 84.356034][ T5372] vfs_unlink+0x2e0/0x4f4 [ 84.356804][ T5372] do_unlinkat+0x328/0x618 [ 84.357623][ T5372] __arm64_sys_unlinkat+0xe0/0xfc [ 84.358481][ T5372] invoke_syscall+0x98/0x2b0 [ 84.359263][ T5372] el0_svc_common+0x138/0x258 [ 84.360029][ T5372] do_el0_svc+0x58/0x13c [ 84.360692][ T5372] el0_svc+0x78/0x1d0 [ 84.361348][ T5372] el0t_64_sync_handler+0xcc/0xe4 [ 84.362165][ T5372] el0t_64_sync+0x1a0/0x1a4 [ 84.362922][ T5372] irq event stamp: 80156 [ 84.363587][ T5372] hardirqs last enabled at (80155): [] __up_console_sem+0xb4/0xfc [ 84.365091][ T5372] hardirqs last disabled at (80156): [] el1_dbg+0x24/0x80 [ 84.366567][ T5372] softirqs last enabled at (80136): [] handle_softirqs+0xa40/0xbe4 [ 84.368148][ T5372] softirqs last disabled at (80019): [] __irq_exit_rcu+0x240/0x43c [ 84.369707][ T5372] ---[ end trace 27e067890dc39777 ]--- [ 84.372933][ T5372] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 84.374483][ T5372] BTRFS info (device loop0): forced readonly [ 84.512915][ T5394] loop0: detected capacity change from 0 to 32768 [ 84.598865][ T5394] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.35 (5394) [ 84.602165][ T5394] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 84.603745][ T5394] BTRFS info (device loop0): using free space tree [ 84.604775][ T5394] BTRFS info (device loop0): has skinny extents [ 84.613733][ T5394] BTRFS info (device loop0): enabling ssd optimizations [ 84.617786][ T5394] FAULT_INJECTION: forcing a failure. [ 84.617786][ T5394] name failslab, interval 1, probability 0, space 0, times 0 [ 84.620070][ T5394] CPU: 0 PID: 5394 Comm: syz.0.35 Tainted: G W syzkaller #0 [ 84.621561][ T5394] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 84.623301][ T5394] Call trace: [ 84.623847][ T5394] dump_backtrace+0x0/0x458 [ 84.624588][ T5394] show_stack+0x2c/0x3c [ 84.625281][ T5394] __dump_stack+0x30/0x40 [ 84.625984][ T5394] dump_stack_lvl+0xf4/0x15c [ 84.626773][ T5394] dump_stack+0x1c/0x5c [ 84.627445][ T5394] should_fail+0x3bc/0x514 [ 84.628203][ T5394] __should_failslab+0xbc/0x10c [ 84.628998][ T5394] should_failslab+0x10/0x28 [ 84.629771][ T5394] slab_pre_alloc_hook+0x64/0xe8 [ 84.630594][ T5394] kmem_cache_alloc_trace+0x98/0x3ec [ 84.631553][ T5394] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 84.632611][ T5394] __btrfs_unlink_inode+0x350/0xaec [ 84.633475][ T5394] btrfs_unlink+0x108/0x258 [ 84.634257][ T5394] vfs_unlink+0x2e0/0x4f4 [ 84.635027][ T5394] do_unlinkat+0x328/0x618 [ 84.635795][ T5394] __arm64_sys_unlinkat+0xe0/0xfc [ 84.636656][ T5394] invoke_syscall+0x98/0x2b0 [ 84.637425][ T5394] el0_svc_common+0x138/0x258 [ 84.638210][ T5394] do_el0_svc+0x58/0x13c [ 84.638913][ T5394] el0_svc+0x78/0x1d0 [ 84.639556][ T5394] el0t_64_sync_handler+0xcc/0xe4 [ 84.640392][ T5394] el0t_64_sync+0x1a0/0x1a4 [ 84.641320][ T5394] ------------[ cut here ]------------ [ 84.642409][ T5394] WARNING: CPU: 0 PID: 5394 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 84.644013][ T5394] Modules linked in: [ 84.644658][ T5394] CPU: 0 PID: 5394 Comm: syz.0.35 Tainted: G W syzkaller #0 [ 84.646121][ T5394] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 84.647778][ T5394] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 84.649071][ T5394] pc : __btrfs_unlink_inode+0x904/0xaec [ 84.649981][ T5394] lr : __btrfs_unlink_inode+0x904/0xaec [ 84.650959][ T5394] sp : ffff800021767a60 [ 84.651649][ T5394] x29: ffff800021767b10 x28: ffff0000d6dbe000 x27: ffff0000e2e55c10 [ 84.653045][ T5394] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d8d376e0 [ 84.654418][ T5394] x23: ffff7000042ecf54 x22: dfff800000000000 x21: ffff0000ed118000 [ 84.655793][ T5394] x20: ffff0000df2e0aa8 x19: 1fffe0001be5c155 x18: 0000000000000001 [ 84.657101][ T5394] x17: 0000000000000000 x16: ffff800008304c04 x15: 00000000ffffffff [ 84.658518][ T5394] x14: 0000000000000001 x13: 1ffff000042ece6c x12: 0000000000ff0100 [ 84.659939][ T5394] x11: 0000000000000000 x10: 0000000000000000 x9 : 10cc39b7a4fdc400 [ 84.661296][ T5394] x8 : 10cc39b7a4fdc400 x7 : 0000000000000001 x6 : 0000000000000001 [ 84.662592][ T5394] x5 : ffff800021767378 x4 : ffff80001437f3e0 x3 : ffff800008304d14 [ 84.663957][ T5394] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 84.665335][ T5394] Call trace: [ 84.665838][ T5394] __btrfs_unlink_inode+0x904/0xaec [ 84.666672][ T5394] btrfs_unlink+0x108/0x258 [ 84.667405][ T5394] vfs_unlink+0x2e0/0x4f4 [ 84.668113][ T5394] do_unlinkat+0x328/0x618 [ 84.668876][ T5394] __arm64_sys_unlinkat+0xe0/0xfc [ 84.669717][ T5394] invoke_syscall+0x98/0x2b0 [ 84.670514][ T5394] el0_svc_common+0x138/0x258 [ 84.671323][ T5394] do_el0_svc+0x58/0x13c [ 84.672001][ T5394] el0_svc+0x78/0x1d0 [ 84.672699][ T5394] el0t_64_sync_handler+0xcc/0xe4 [ 84.673567][ T5394] el0t_64_sync+0x1a0/0x1a4 [ 84.674327][ T5394] irq event stamp: 80082 [ 84.675025][ T5394] hardirqs last enabled at (80081): [] __up_console_sem+0xb4/0xfc [ 84.676612][ T5394] hardirqs last disabled at (80082): [] el1_dbg+0x24/0x80 [ 84.678047][ T5394] softirqs last enabled at (80062): [] handle_softirqs+0xa40/0xbe4 [ 84.679661][ T5394] softirqs last disabled at (80045): [] __irq_exit_rcu+0x240/0x43c [ 84.681184][ T5394] ---[ end trace 27e067890dc39778 ]--- [ 84.682528][ T5394] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 84.684231][ T5394] BTRFS info (device loop0): forced readonly [ 84.820727][ T5416] loop0: detected capacity change from 0 to 32768 [ 84.895155][ T5416] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.36 (5416) [ 84.901085][ T5416] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 84.903096][ T5416] BTRFS info (device loop0): using free space tree [ 84.904121][ T5416] BTRFS info (device loop0): has skinny extents [ 84.913269][ T5416] BTRFS info (device loop0): enabling ssd optimizations [ 84.920685][ T5416] FAULT_INJECTION: forcing a failure. [ 84.920685][ T5416] name failslab, interval 1, probability 0, space 0, times 0 [ 84.923683][ T5416] CPU: 1 PID: 5416 Comm: syz.0.36 Tainted: G W syzkaller #0 [ 84.925082][ T5416] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 84.926742][ T5416] Call trace: [ 84.927271][ T5416] dump_backtrace+0x0/0x458 [ 84.928016][ T5416] show_stack+0x2c/0x3c [ 84.928725][ T5416] __dump_stack+0x30/0x40 [ 84.929444][ T5416] dump_stack_lvl+0xf4/0x15c [ 84.930218][ T5416] dump_stack+0x1c/0x5c [ 84.930907][ T5416] should_fail+0x3bc/0x514 [ 84.931662][ T5416] __should_failslab+0xbc/0x10c [ 84.932469][ T5416] should_failslab+0x10/0x28 [ 84.933241][ T5416] slab_pre_alloc_hook+0x64/0xe8 [ 84.934075][ T5416] kmem_cache_alloc+0x94/0x3d4 [ 84.934920][ T5416] btrfs_alloc_path+0x5c/0x68 [ 84.935714][ T5416] __btrfs_unlink_inode+0x1dc/0xaec [ 84.936559][ T5416] btrfs_unlink+0x108/0x258 [ 84.937325][ T5416] vfs_unlink+0x2e0/0x4f4 [ 84.938041][ T5416] do_unlinkat+0x328/0x618 [ 84.938762][ T5416] __arm64_sys_unlinkat+0xe0/0xfc [ 84.939573][ T5416] invoke_syscall+0x98/0x2b0 [ 84.940327][ T5416] el0_svc_common+0x138/0x258 [ 84.941077][ T5416] do_el0_svc+0x58/0x13c [ 84.941795][ T5416] el0_svc+0x78/0x1d0 [ 84.942464][ T5416] el0t_64_sync_handler+0xcc/0xe4 [ 84.943324][ T5416] el0t_64_sync+0x1a0/0x1a4 [ 84.985136][ T4524] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 10 /dev/loop0 scanned by udevd (4524) [ 85.087712][ T5437] loop0: detected capacity change from 0 to 32768 [ 85.206273][ T5437] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 85.207785][ T5437] BTRFS info (device loop0): using free space tree [ 85.208896][ T5437] BTRFS info (device loop0): has skinny extents [ 85.222144][ T5437] BTRFS info (device loop0): enabling ssd optimizations [ 85.235347][ T5437] FAULT_INJECTION: forcing a failure. [ 85.235347][ T5437] name failslab, interval 1, probability 0, space 0, times 0 [ 85.237593][ T5437] CPU: 0 PID: 5437 Comm: syz.0.37 Tainted: G W syzkaller #0 [ 85.239110][ T5437] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 85.240872][ T5437] Call trace: [ 85.241396][ T5437] dump_backtrace+0x0/0x458 [ 85.242154][ T5437] show_stack+0x2c/0x3c [ 85.242835][ T5437] __dump_stack+0x30/0x40 [ 85.243586][ T5437] dump_stack_lvl+0xf4/0x15c [ 85.244366][ T5437] dump_stack+0x1c/0x5c [ 85.245031][ T5437] should_fail+0x3bc/0x514 [ 85.245842][ T5437] __should_failslab+0xbc/0x10c [ 85.246669][ T5437] should_failslab+0x10/0x28 [ 85.247438][ T5437] slab_pre_alloc_hook+0x64/0xe8 [ 85.248265][ T5437] kmem_cache_alloc+0x94/0x3d4 [ 85.249063][ T5437] btrfs_alloc_path+0x5c/0x68 [ 85.249812][ T5437] __btrfs_unlink_inode+0x1dc/0xaec [ 85.250654][ T5437] btrfs_unlink+0x108/0x258 [ 85.251403][ T5437] vfs_unlink+0x2e0/0x4f4 [ 85.252167][ T5437] do_unlinkat+0x328/0x618 [ 85.252941][ T5437] __arm64_sys_unlinkat+0xe0/0xfc [ 85.253754][ T5437] invoke_syscall+0x98/0x2b0 [ 85.254530][ T5437] el0_svc_common+0x138/0x258 [ 85.255341][ T5437] do_el0_svc+0x58/0x13c [ 85.256068][ T5437] el0_svc+0x78/0x1d0 [ 85.256706][ T5437] el0t_64_sync_handler+0xcc/0xe4 [ 85.257556][ T5437] el0t_64_sync+0x1a0/0x1a4 [ 85.415190][ T5460] loop0: detected capacity change from 0 to 32768 [ 85.454777][ T5460] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.38 (5460) [ 85.458274][ T5460] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 85.459794][ T5460] BTRFS info (device loop0): using free space tree [ 85.460842][ T5460] BTRFS info (device loop0): has skinny extents [ 85.470343][ T5460] BTRFS info (device loop0): enabling ssd optimizations [ 85.476176][ T5460] FAULT_INJECTION: forcing a failure. [ 85.476176][ T5460] name failslab, interval 1, probability 0, space 0, times 0 [ 85.478292][ T5460] CPU: 0 PID: 5460 Comm: syz.0.38 Tainted: G W syzkaller #0 [ 85.479789][ T5460] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 85.481574][ T5460] Call trace: [ 85.482161][ T5460] dump_backtrace+0x0/0x458 [ 85.482902][ T5460] show_stack+0x2c/0x3c [ 85.483664][ T5460] __dump_stack+0x30/0x40 [ 85.484407][ T5460] dump_stack_lvl+0xf4/0x15c [ 85.485225][ T5460] dump_stack+0x1c/0x5c [ 85.485919][ T5460] should_fail+0x3bc/0x514 [ 85.486681][ T5460] __should_failslab+0xbc/0x10c [ 85.487570][ T5460] should_failslab+0x10/0x28 [ 85.488366][ T5460] slab_pre_alloc_hook+0x64/0xe8 [ 85.489276][ T5460] kmem_cache_alloc_trace+0x98/0x3ec [ 85.490225][ T5460] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 85.491344][ T5460] __btrfs_unlink_inode+0x350/0xaec [ 85.492267][ T5460] btrfs_unlink+0x108/0x258 [ 85.493056][ T5460] vfs_unlink+0x2e0/0x4f4 [ 85.493793][ T5460] do_unlinkat+0x328/0x618 [ 85.494528][ T5460] __arm64_sys_unlinkat+0xe0/0xfc [ 85.495392][ T5460] invoke_syscall+0x98/0x2b0 [ 85.496178][ T5460] el0_svc_common+0x138/0x258 [ 85.496971][ T5460] do_el0_svc+0x58/0x13c [ 85.497717][ T5460] el0_svc+0x78/0x1d0 [ 85.498422][ T5460] el0t_64_sync_handler+0xcc/0xe4 [ 85.499263][ T5460] el0t_64_sync+0x1a0/0x1a4 [ 85.501401][ T5460] ------------[ cut here ]------------ [ 85.502454][ T5460] WARNING: CPU: 0 PID: 5460 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 85.503976][ T5460] Modules linked in: [ 85.504648][ T5460] CPU: 0 PID: 5460 Comm: syz.0.38 Tainted: G W syzkaller #0 [ 85.506075][ T5460] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 85.507643][ T5460] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 85.508875][ T5460] pc : __btrfs_unlink_inode+0x904/0xaec [ 85.509811][ T5460] lr : __btrfs_unlink_inode+0x904/0xaec [ 85.510772][ T5460] sp : ffff800021bc7a60 [ 85.511513][ T5460] x29: ffff800021bc7b10 x28: ffff0000dcd74000 x27: ffff0000e2e56410 [ 85.512900][ T5460] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000ca93fd10 [ 85.514257][ T5460] x23: ffff700004378f54 x22: dfff800000000000 x21: ffff0000ed1c5850 [ 85.515714][ T5460] x20: ffff0000df2e0d68 x19: 1fffe0001be5c1ad x18: 0000000000000001 [ 85.517046][ T5460] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 85.518445][ T5460] x14: 0000000000000001 x13: 1fffe000341f05ab x12: 0000000000ff0100 [ 85.519801][ T5460] x11: 0000000000000000 x10: 0000000000000000 x9 : 40f056a7ad236900 [ 85.521182][ T5460] x8 : 40f056a7ad236900 x7 : 0000000000000001 x6 : 0000000000000001 [ 85.522518][ T5460] x5 : ffff800021bc7378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 85.523924][ T5460] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 85.525313][ T5460] Call trace: [ 85.525877][ T5460] __btrfs_unlink_inode+0x904/0xaec [ 85.526756][ T5460] btrfs_unlink+0x108/0x258 [ 85.527549][ T5460] vfs_unlink+0x2e0/0x4f4 [ 85.528281][ T5460] do_unlinkat+0x328/0x618 [ 85.529052][ T5460] __arm64_sys_unlinkat+0xe0/0xfc [ 85.529919][ T5460] invoke_syscall+0x98/0x2b0 [ 85.530694][ T5460] el0_svc_common+0x138/0x258 [ 85.531505][ T5460] do_el0_svc+0x58/0x13c [ 85.532228][ T5460] el0_svc+0x78/0x1d0 [ 85.532938][ T5460] el0t_64_sync_handler+0xcc/0xe4 [ 85.533823][ T5460] el0t_64_sync+0x1a0/0x1a4 [ 85.534585][ T5460] irq event stamp: 80538 [ 85.535318][ T5460] hardirqs last enabled at (80537): [] __up_console_sem+0xb4/0xfc [ 85.536966][ T5460] hardirqs last disabled at (80538): [] el1_dbg+0x24/0x80 [ 85.538380][ T5460] softirqs last enabled at (80518): [] handle_softirqs+0xa40/0xbe4 [ 85.540027][ T5460] softirqs last disabled at (80495): [] __irq_exit_rcu+0x240/0x43c [ 85.541761][ T5460] ---[ end trace 27e067890dc39779 ]--- [ 85.543028][ T5460] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 85.544501][ T5460] BTRFS info (device loop0): forced readonly [ 85.698406][ T5482] loop0: detected capacity change from 0 to 32768 [ 85.763836][ T5482] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.39 (5482) [ 85.766898][ T5482] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 85.768436][ T5482] BTRFS info (device loop0): using free space tree [ 85.773566][ T5482] BTRFS info (device loop0): has skinny extents [ 85.780861][ T5482] BTRFS info (device loop0): enabling ssd optimizations [ 85.786535][ T5482] FAULT_INJECTION: forcing a failure. [ 85.786535][ T5482] name failslab, interval 1, probability 0, space 0, times 0 [ 85.788719][ T5482] CPU: 1 PID: 5482 Comm: syz.0.39 Tainted: G W syzkaller #0 [ 85.790164][ T5482] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 85.791842][ T5482] Call trace: [ 85.792376][ T5482] dump_backtrace+0x0/0x458 [ 85.793145][ T5482] show_stack+0x2c/0x3c [ 85.793895][ T5482] __dump_stack+0x30/0x40 [ 85.794651][ T5482] dump_stack_lvl+0xf4/0x15c [ 85.795434][ T5482] dump_stack+0x1c/0x5c [ 85.796213][ T5482] should_fail+0x3bc/0x514 [ 85.796969][ T5482] __should_failslab+0xbc/0x10c [ 85.797801][ T5482] should_failslab+0x10/0x28 [ 85.798565][ T5482] slab_pre_alloc_hook+0x64/0xe8 [ 85.799399][ T5482] kmem_cache_alloc+0x94/0x3d4 [ 85.800228][ T5482] btrfs_alloc_path+0x5c/0x68 [ 85.800988][ T5482] __btrfs_unlink_inode+0x1dc/0xaec [ 85.801917][ T5482] btrfs_unlink+0x108/0x258 [ 85.802691][ T5482] vfs_unlink+0x2e0/0x4f4 [ 85.803435][ T5482] do_unlinkat+0x328/0x618 [ 85.804184][ T5482] __arm64_sys_unlinkat+0xe0/0xfc [ 85.805018][ T5482] invoke_syscall+0x98/0x2b0 [ 85.805785][ T5482] el0_svc_common+0x138/0x258 [ 85.806584][ T5482] do_el0_svc+0x58/0x13c [ 85.807294][ T5482] el0_svc+0x78/0x1d0 [ 85.807925][ T5482] el0t_64_sync_handler+0xcc/0xe4 [ 85.808753][ T5482] el0t_64_sync+0x1a0/0x1a4 [ 85.874164][ T4524] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 10 /dev/loop0 scanned by udevd (4524) [ 85.952405][ T5503] loop0: detected capacity change from 0 to 32768 [ 85.996934][ T5503] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 85.998355][ T5503] BTRFS info (device loop0): using free space tree [ 85.999382][ T5503] BTRFS info (device loop0): has skinny extents [ 86.007174][ T5503] BTRFS info (device loop0): enabling ssd optimizations [ 86.010916][ T5503] FAULT_INJECTION: forcing a failure. [ 86.010916][ T5503] name failslab, interval 1, probability 0, space 0, times 0 [ 86.013182][ T5503] CPU: 1 PID: 5503 Comm: syz.0.40 Tainted: G W syzkaller #0 [ 86.014605][ T5503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 86.016248][ T5503] Call trace: [ 86.016797][ T5503] dump_backtrace+0x0/0x458 [ 86.017614][ T5503] show_stack+0x2c/0x3c [ 86.018291][ T5503] __dump_stack+0x30/0x40 [ 86.018999][ T5503] dump_stack_lvl+0xf4/0x15c [ 86.019724][ T5503] dump_stack+0x1c/0x5c [ 86.020400][ T5503] should_fail+0x3bc/0x514 [ 86.021089][ T5503] __should_failslab+0xbc/0x10c [ 86.021836][ T5503] should_failslab+0x10/0x28 [ 86.022651][ T5503] slab_pre_alloc_hook+0x64/0xe8 [ 86.023487][ T5503] kmem_cache_alloc_trace+0x98/0x3ec [ 86.024405][ T5503] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 86.025408][ T5503] __btrfs_unlink_inode+0x350/0xaec [ 86.026279][ T5503] btrfs_unlink+0x108/0x258 [ 86.027044][ T5503] vfs_unlink+0x2e0/0x4f4 [ 86.027757][ T5503] do_unlinkat+0x328/0x618 [ 86.028455][ T5503] __arm64_sys_unlinkat+0xe0/0xfc [ 86.029284][ T5503] invoke_syscall+0x98/0x2b0 [ 86.030040][ T5503] el0_svc_common+0x138/0x258 [ 86.030777][ T5503] do_el0_svc+0x58/0x13c [ 86.031434][ T5503] el0_svc+0x78/0x1d0 [ 86.032090][ T5503] el0t_64_sync_handler+0xcc/0xe4 [ 86.032885][ T5503] el0t_64_sync+0x1a0/0x1a4 [ 86.033804][ T5503] ------------[ cut here ]------------ [ 86.034834][ T5503] WARNING: CPU: 1 PID: 5503 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 86.036312][ T5503] Modules linked in: [ 86.036947][ T5503] CPU: 1 PID: 5503 Comm: syz.0.40 Tainted: G W syzkaller #0 [ 86.038357][ T5503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 86.040031][ T5503] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 86.041273][ T5503] pc : __btrfs_unlink_inode+0x904/0xaec [ 86.042193][ T5503] lr : __btrfs_unlink_inode+0x904/0xaec [ 86.043120][ T5503] sp : ffff800021e27a60 [ 86.043767][ T5503] x29: ffff800021e27b10 x28: ffff0000d55be000 x27: ffff0000dd7f6010 [ 86.045138][ T5503] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d0bc5790 [ 86.046476][ T5503] x23: ffff7000043c4f54 x22: dfff800000000000 x21: ffff0000e2eca740 [ 86.047839][ T5503] x20: ffff0000dd6279f8 x19: 1fffe0001bac4f3f x18: 0000000000000001 [ 86.049150][ T5503] x17: 0000000000000000 x16: ffff800008304c04 x15: 00000000ffffffff [ 86.050459][ T5503] x14: 0000000000000001 x13: 1ffff000043c4e6c x12: 0000000000ff0100 [ 86.051769][ T5503] x11: 0000000000000000 x10: 0000000000000000 x9 : e71b8ef76f3eae00 [ 86.053098][ T5503] x8 : e71b8ef76f3eae00 x7 : 0000000000000001 x6 : 0000000000000001 [ 86.054444][ T5503] x5 : ffff800021e27378 x4 : ffff80001437f3e0 x3 : ffff800008304d14 [ 86.055844][ T5503] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 86.057206][ T5503] Call trace: [ 86.057760][ T5503] __btrfs_unlink_inode+0x904/0xaec [ 86.058626][ T5503] btrfs_unlink+0x108/0x258 [ 86.059369][ T5503] vfs_unlink+0x2e0/0x4f4 [ 86.060084][ T5503] do_unlinkat+0x328/0x618 [ 86.060837][ T5503] __arm64_sys_unlinkat+0xe0/0xfc [ 86.061672][ T5503] invoke_syscall+0x98/0x2b0 [ 86.062381][ T5503] el0_svc_common+0x138/0x258 [ 86.063140][ T5503] do_el0_svc+0x58/0x13c [ 86.063838][ T5503] el0_svc+0x78/0x1d0 [ 86.064491][ T5503] el0t_64_sync_handler+0xcc/0xe4 [ 86.065319][ T5503] el0t_64_sync+0x1a0/0x1a4 [ 86.066045][ T5503] irq event stamp: 79932 [ 86.066824][ T5503] hardirqs last enabled at (79931): [] __up_console_sem+0xb4/0xfc [ 86.068477][ T5503] hardirqs last disabled at (79932): [] el1_dbg+0x24/0x80 [ 86.069910][ T5503] softirqs last enabled at (79912): [] handle_softirqs+0xa40/0xbe4 [ 86.071500][ T5503] softirqs last disabled at (79901): [] __irq_exit_rcu+0x240/0x43c [ 86.073092][ T5503] ---[ end trace 27e067890dc3977a ]--- [ 86.074252][ T5503] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 86.075869][ T5503] BTRFS info (device loop0): forced readonly [ 86.215922][ T5526] loop0: detected capacity change from 0 to 32768 [ 86.286934][ T5526] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.41 (5526) [ 86.290832][ T5526] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 86.292319][ T5526] BTRFS info (device loop0): using free space tree [ 86.293804][ T5526] BTRFS info (device loop0): has skinny extents [ 86.301875][ T5526] BTRFS info (device loop0): enabling ssd optimizations [ 86.306537][ T5526] FAULT_INJECTION: forcing a failure. [ 86.306537][ T5526] name failslab, interval 1, probability 0, space 0, times 0 [ 86.308656][ T5526] CPU: 0 PID: 5526 Comm: syz.0.41 Tainted: G W syzkaller #0 [ 86.310107][ T5526] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 86.311830][ T5526] Call trace: [ 86.312362][ T5526] dump_backtrace+0x0/0x458 [ 86.313126][ T5526] show_stack+0x2c/0x3c [ 86.313883][ T5526] __dump_stack+0x30/0x40 [ 86.314619][ T5526] dump_stack_lvl+0xf4/0x15c [ 86.315413][ T5526] dump_stack+0x1c/0x5c [ 86.316087][ T5526] should_fail+0x3bc/0x514 [ 86.316835][ T5526] __should_failslab+0xbc/0x10c [ 86.317643][ T5526] should_failslab+0x10/0x28 [ 86.318476][ T5526] slab_pre_alloc_hook+0x64/0xe8 [ 86.319355][ T5526] kmem_cache_alloc_trace+0x98/0x3ec [ 86.320229][ T5526] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 86.321203][ T5526] __btrfs_unlink_inode+0x350/0xaec [ 86.322119][ T5526] btrfs_unlink+0x108/0x258 [ 86.322851][ T5526] vfs_unlink+0x2e0/0x4f4 [ 86.323602][ T5526] do_unlinkat+0x328/0x618 [ 86.324297][ T5526] __arm64_sys_unlinkat+0xe0/0xfc [ 86.325150][ T5526] invoke_syscall+0x98/0x2b0 [ 86.325931][ T5526] el0_svc_common+0x138/0x258 [ 86.326686][ T5526] do_el0_svc+0x58/0x13c [ 86.327421][ T5526] el0_svc+0x78/0x1d0 [ 86.328107][ T5526] el0t_64_sync_handler+0xcc/0xe4 [ 86.328983][ T5526] el0t_64_sync+0x1a0/0x1a4 [ 86.332029][ T5526] ------------[ cut here ]------------ [ 86.333132][ T5526] WARNING: CPU: 0 PID: 5526 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 86.334676][ T5526] Modules linked in: [ 86.335287][ T5526] CPU: 0 PID: 5526 Comm: syz.0.41 Tainted: G W syzkaller #0 [ 86.336787][ T5526] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 86.338453][ T5526] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 86.339866][ T5526] pc : __btrfs_unlink_inode+0x904/0xaec [ 86.340749][ T5526] lr : __btrfs_unlink_inode+0x904/0xaec [ 86.341709][ T5526] sp : ffff800021bc7a60 [ 86.342395][ T5526] x29: ffff800021bc7b10 x28: ffff0000c9b9e000 x27: ffff0000e2e56810 [ 86.343727][ T5526] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d146bb00 [ 86.345103][ T5526] x23: ffff700004378f54 x22: dfff800000000000 x21: ffff0000ed1c1d70 [ 86.346481][ T5526] x20: ffff0000df2e0108 x19: 1fffe0001be5c021 x18: 0000000000000001 [ 86.347858][ T5526] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 86.349146][ T5526] x14: 0000000000000001 x13: 1fffe000341f05ab x12: 0000000000ff0100 [ 86.350539][ T5526] x11: 0000000000000000 x10: 0000000000000000 x9 : 8489e1c1fb6f1900 [ 86.352028][ T5526] x8 : 8489e1c1fb6f1900 x7 : 0000000000000001 x6 : 0000000000000001 [ 86.353396][ T5526] x5 : ffff800021bc7378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 86.354817][ T5526] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 86.356282][ T5526] Call trace: [ 86.356805][ T5526] __btrfs_unlink_inode+0x904/0xaec [ 86.357673][ T5526] btrfs_unlink+0x108/0x258 [ 86.358394][ T5526] vfs_unlink+0x2e0/0x4f4 [ 86.359111][ T5526] do_unlinkat+0x328/0x618 [ 86.359850][ T5526] __arm64_sys_unlinkat+0xe0/0xfc [ 86.360700][ T5526] invoke_syscall+0x98/0x2b0 [ 86.361476][ T5526] el0_svc_common+0x138/0x258 [ 86.362268][ T5526] do_el0_svc+0x58/0x13c [ 86.362946][ T5526] el0_svc+0x78/0x1d0 [ 86.363589][ T5526] el0t_64_sync_handler+0xcc/0xe4 [ 86.364359][ T5526] el0t_64_sync+0x1a0/0x1a4 [ 86.365137][ T5526] irq event stamp: 81188 [ 86.365900][ T5526] hardirqs last enabled at (81187): [] __up_console_sem+0xb4/0xfc [ 86.367590][ T5526] hardirqs last disabled at (81188): [] el1_dbg+0x24/0x80 [ 86.369097][ T5526] softirqs last enabled at (81178): [] handle_softirqs+0xa40/0xbe4 [ 86.370759][ T5526] softirqs last disabled at (81169): [] __irq_exit_rcu+0x240/0x43c [ 86.372386][ T5526] ---[ end trace 27e067890dc3977b ]--- [ 86.375199][ T5526] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 86.376838][ T5526] BTRFS info (device loop0): forced readonly [ 86.587972][ T5547] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.42 (5547) [ 86.592676][ T5547] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 86.594376][ T5547] BTRFS info (device loop0): using free space tree [ 86.595562][ T5547] BTRFS info (device loop0): has skinny extents [ 86.607902][ T5547] BTRFS info (device loop0): enabling ssd optimizations [ 86.612263][ T5547] FAULT_INJECTION: forcing a failure. [ 86.612263][ T5547] name failslab, interval 1, probability 0, space 0, times 0 [ 86.615755][ T5547] CPU: 1 PID: 5547 Comm: syz.0.42 Tainted: G W syzkaller #0 [ 86.617105][ T5547] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 86.618788][ T5547] Call trace: [ 86.619349][ T5547] dump_backtrace+0x0/0x458 [ 86.620131][ T5547] show_stack+0x2c/0x3c [ 86.620837][ T5547] __dump_stack+0x30/0x40 [ 86.621559][ T5547] dump_stack_lvl+0xf4/0x15c [ 86.622285][ T5547] dump_stack+0x1c/0x5c [ 86.622989][ T5547] should_fail+0x3bc/0x514 [ 86.623731][ T5547] __should_failslab+0xbc/0x10c [ 86.624577][ T5547] should_failslab+0x10/0x28 [ 86.625377][ T5547] slab_pre_alloc_hook+0x64/0xe8 [ 86.626184][ T5547] kmem_cache_alloc_trace+0x98/0x3ec [ 86.627096][ T5547] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 86.628140][ T5547] __btrfs_unlink_inode+0x350/0xaec [ 86.629055][ T5547] btrfs_unlink+0x108/0x258 [ 86.629820][ T5547] vfs_unlink+0x2e0/0x4f4 [ 86.630583][ T5547] do_unlinkat+0x328/0x618 [ 86.631252][ T5547] __arm64_sys_unlinkat+0xe0/0xfc [ 86.632092][ T5547] invoke_syscall+0x98/0x2b0 [ 86.632866][ T5547] el0_svc_common+0x138/0x258 [ 86.633685][ T5547] do_el0_svc+0x58/0x13c [ 86.634370][ T5547] el0_svc+0x78/0x1d0 [ 86.635069][ T5547] el0t_64_sync_handler+0xcc/0xe4 [ 86.635850][ T5547] el0t_64_sync+0x1a0/0x1a4 [ 86.638644][ T5547] ------------[ cut here ]------------ [ 86.639707][ T5547] WARNING: CPU: 1 PID: 5547 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 86.641169][ T5547] Modules linked in: [ 86.641809][ T5547] CPU: 1 PID: 5547 Comm: syz.0.42 Tainted: G W syzkaller #0 [ 86.643248][ T5547] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 86.644910][ T5547] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 86.646173][ T5547] pc : __btrfs_unlink_inode+0x904/0xaec [ 86.647071][ T5547] lr : __btrfs_unlink_inode+0x904/0xaec [ 86.647971][ T5547] sp : ffff8000220c7a60 [ 86.648739][ T5547] x29: ffff8000220c7b10 x28: ffff0000cbffe000 x27: ffff0000dd7f6410 [ 86.650104][ T5547] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d296a4d0 [ 86.651505][ T5547] x23: ffff700004418f54 x22: dfff800000000000 x21: ffff0000e2ecbae0 [ 86.652934][ T5547] x20: ffff0000dd627b58 x19: 1fffe0001bac4f6b x18: 0000000000000001 [ 86.654292][ T5547] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 86.655670][ T5547] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 86.657057][ T5547] x11: 0000000000000000 x10: 0000000000000000 x9 : f598e3d4426e4f00 [ 86.658375][ T5547] x8 : f598e3d4426e4f00 x7 : 0000000000000001 x6 : 0000000000000001 [ 86.659650][ T5547] x5 : ffff8000220c7378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 86.660933][ T5547] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 86.662269][ T5547] Call trace: [ 86.662842][ T5547] __btrfs_unlink_inode+0x904/0xaec [ 86.663707][ T5547] btrfs_unlink+0x108/0x258 [ 86.664482][ T5547] vfs_unlink+0x2e0/0x4f4 [ 86.665235][ T5547] do_unlinkat+0x328/0x618 [ 86.665978][ T5547] __arm64_sys_unlinkat+0xe0/0xfc [ 86.666799][ T5547] invoke_syscall+0x98/0x2b0 [ 86.667559][ T5547] el0_svc_common+0x138/0x258 [ 86.668393][ T5547] do_el0_svc+0x58/0x13c [ 86.669104][ T5547] el0_svc+0x78/0x1d0 [ 86.669810][ T5547] el0t_64_sync_handler+0xcc/0xe4 [ 86.670729][ T5547] el0t_64_sync+0x1a0/0x1a4 [ 86.671479][ T5547] irq event stamp: 79748 [ 86.672168][ T5547] hardirqs last enabled at (79747): [] __up_console_sem+0xb4/0xfc [ 86.673831][ T5547] hardirqs last disabled at (79748): [] el1_dbg+0x24/0x80 [ 86.675265][ T5547] softirqs last enabled at (79728): [] handle_softirqs+0xa40/0xbe4 [ 86.676854][ T5547] softirqs last disabled at (79663): [] __irq_exit_rcu+0x240/0x43c [ 86.678479][ T5547] ---[ end trace 27e067890dc3977c ]--- [ 86.681805][ T5547] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 86.683374][ T5547] BTRFS info (device loop0): forced readonly [ 86.936794][ T5569] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.43 (5569) [ 86.940215][ T5569] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 86.941668][ T5569] BTRFS info (device loop0): using free space tree [ 86.942752][ T5569] BTRFS info (device loop0): has skinny extents [ 86.951761][ T5569] BTRFS info (device loop0): enabling ssd optimizations [ 86.957356][ T5569] FAULT_INJECTION: forcing a failure. [ 86.957356][ T5569] name failslab, interval 1, probability 0, space 0, times 0 [ 86.959621][ T5569] CPU: 1 PID: 5569 Comm: syz.0.43 Tainted: G W syzkaller #0 [ 86.961112][ T5569] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 86.962777][ T5569] Call trace: [ 86.963366][ T5569] dump_backtrace+0x0/0x458 [ 86.964167][ T5569] show_stack+0x2c/0x3c [ 86.964871][ T5569] __dump_stack+0x30/0x40 [ 86.965547][ T5569] dump_stack_lvl+0xf4/0x15c [ 86.966312][ T5569] dump_stack+0x1c/0x5c [ 86.967087][ T5569] should_fail+0x3bc/0x514 [ 86.967809][ T5569] __should_failslab+0xbc/0x10c [ 86.968627][ T5569] should_failslab+0x10/0x28 [ 86.969388][ T5569] slab_pre_alloc_hook+0x64/0xe8 [ 86.970181][ T5569] kmem_cache_alloc_trace+0x98/0x3ec [ 86.971093][ T5569] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 86.972008][ T5569] __btrfs_unlink_inode+0x350/0xaec [ 86.972836][ T5569] btrfs_unlink+0x108/0x258 [ 86.973596][ T5569] vfs_unlink+0x2e0/0x4f4 [ 86.974304][ T5569] do_unlinkat+0x328/0x618 [ 86.975053][ T5569] __arm64_sys_unlinkat+0xe0/0xfc [ 86.975902][ T5569] invoke_syscall+0x98/0x2b0 [ 86.976702][ T5569] el0_svc_common+0x138/0x258 [ 86.977460][ T5569] do_el0_svc+0x58/0x13c [ 86.978190][ T5569] el0_svc+0x78/0x1d0 [ 86.978821][ T5569] el0t_64_sync_handler+0xcc/0xe4 [ 86.979631][ T5569] el0t_64_sync+0x1a0/0x1a4 [ 86.983440][ T5569] ------------[ cut here ]------------ [ 86.984427][ T5569] WARNING: CPU: 1 PID: 5569 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 86.985929][ T5569] Modules linked in: [ 86.986524][ T5569] CPU: 1 PID: 5569 Comm: syz.0.43 Tainted: G W syzkaller #0 [ 86.987930][ T5569] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 86.989618][ T5569] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 86.990934][ T5569] pc : __btrfs_unlink_inode+0x904/0xaec [ 86.991855][ T5569] lr : __btrfs_unlink_inode+0x904/0xaec [ 86.992778][ T5569] sp : ffff800022217a60 [ 86.993456][ T5569] x29: ffff800022217b10 x28: ffff0000c667c000 x27: ffff0000dd7f5410 [ 86.994820][ T5569] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000d4cc2210 [ 86.996249][ T5569] x23: ffff700004442f54 x22: dfff800000000000 x21: ffff0000e2f444b0 [ 86.997621][ T5569] x20: ffff0000dd627cb8 x19: 1fffe0001bac4f97 x18: 0000000000000001 [ 86.998969][ T5569] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 87.000268][ T5569] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 87.001584][ T5569] x11: 0000000000000000 x10: 0000000000000000 x9 : 946d59ca579fc300 [ 87.002857][ T5569] x8 : 946d59ca579fc300 x7 : 0000000000000001 x6 : 0000000000000001 [ 87.004193][ T5569] x5 : ffff800022217378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 87.005543][ T5569] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 87.006791][ T5569] Call trace: [ 87.007308][ T5569] __btrfs_unlink_inode+0x904/0xaec [ 87.008150][ T5569] btrfs_unlink+0x108/0x258 [ 87.008912][ T5569] vfs_unlink+0x2e0/0x4f4 [ 87.009610][ T5569] do_unlinkat+0x328/0x618 [ 87.010350][ T5569] __arm64_sys_unlinkat+0xe0/0xfc [ 87.011180][ T5569] invoke_syscall+0x98/0x2b0 [ 87.011897][ T5569] el0_svc_common+0x138/0x258 [ 87.012680][ T5569] do_el0_svc+0x58/0x13c [ 87.013379][ T5569] el0_svc+0x78/0x1d0 [ 87.014056][ T5569] el0t_64_sync_handler+0xcc/0xe4 [ 87.014922][ T5569] el0t_64_sync+0x1a0/0x1a4 [ 87.015689][ T5569] irq event stamp: 80642 [ 87.016366][ T5569] hardirqs last enabled at (80641): [] __up_console_sem+0xb4/0xfc [ 87.017978][ T5569] hardirqs last disabled at (80642): [] el1_dbg+0x24/0x80 [ 87.019458][ T5569] softirqs last enabled at (80622): [] handle_softirqs+0xa40/0xbe4 [ 87.021073][ T5569] softirqs last disabled at (80601): [] __irq_exit_rcu+0x240/0x43c [ 87.022673][ T5569] ---[ end trace 27e067890dc3977d ]--- [ 87.025842][ T5569] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 87.027432][ T5569] BTRFS info (device loop0): forced readonly [ 87.214287][ T5591] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.44 (5591) [ 87.265482][ T5591] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 87.267079][ T5591] BTRFS info (device loop0): using free space tree [ 87.268278][ T5591] BTRFS info (device loop0): has skinny extents [ 87.278449][ T5591] BTRFS info (device loop0): enabling ssd optimizations [ 87.282632][ T5591] FAULT_INJECTION: forcing a failure. [ 87.282632][ T5591] name failslab, interval 1, probability 0, space 0, times 0 [ 87.284895][ T5591] CPU: 0 PID: 5591 Comm: syz.0.44 Tainted: G W syzkaller #0 [ 87.286345][ T5591] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 87.287927][ T5591] Call trace: [ 87.288510][ T5591] dump_backtrace+0x0/0x458 [ 87.289272][ T5591] show_stack+0x2c/0x3c [ 87.289991][ T5591] __dump_stack+0x30/0x40 [ 87.290740][ T5591] dump_stack_lvl+0xf4/0x15c [ 87.291484][ T5591] dump_stack+0x1c/0x5c [ 87.292173][ T5591] should_fail+0x3bc/0x514 [ 87.292892][ T5591] __should_failslab+0xbc/0x10c [ 87.293704][ T5591] should_failslab+0x10/0x28 [ 87.294513][ T5591] slab_pre_alloc_hook+0x64/0xe8 [ 87.295324][ T5591] kmem_cache_alloc+0x94/0x3d4 [ 87.296143][ T5591] btrfs_alloc_path+0x5c/0x68 [ 87.296951][ T5591] __btrfs_unlink_inode+0x1dc/0xaec [ 87.297849][ T5591] btrfs_unlink+0x108/0x258 [ 87.298580][ T5591] vfs_unlink+0x2e0/0x4f4 [ 87.299316][ T5591] do_unlinkat+0x328/0x618 [ 87.300075][ T5591] __arm64_sys_unlinkat+0xe0/0xfc [ 87.300896][ T5591] invoke_syscall+0x98/0x2b0 [ 87.301684][ T5591] el0_svc_common+0x138/0x258 [ 87.302484][ T5591] do_el0_svc+0x58/0x13c [ 87.303183][ T5591] el0_svc+0x78/0x1d0 [ 87.303903][ T5591] el0t_64_sync_handler+0xcc/0xe4 [ 87.304703][ T5591] el0t_64_sync+0x1a0/0x1a4 [ 87.348758][ T4524] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 10 /dev/loop0 scanned by udevd (4524) [ 87.584964][ T5612] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 87.586535][ T5612] BTRFS info (device loop0): using free space tree [ 87.587707][ T5612] BTRFS info (device loop0): has skinny extents [ 87.595648][ T5612] BTRFS info (device loop0): enabling ssd optimizations [ 87.600537][ T5612] FAULT_INJECTION: forcing a failure. [ 87.600537][ T5612] name failslab, interval 1, probability 0, space 0, times 0 [ 87.602733][ T5612] CPU: 1 PID: 5612 Comm: syz.0.45 Tainted: G W syzkaller #0 [ 87.604125][ T5612] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 87.605803][ T5612] Call trace: [ 87.606330][ T5612] dump_backtrace+0x0/0x458 [ 87.607141][ T5612] show_stack+0x2c/0x3c [ 87.607824][ T5612] __dump_stack+0x30/0x40 [ 87.608592][ T5612] dump_stack_lvl+0xf4/0x15c [ 87.609413][ T5612] dump_stack+0x1c/0x5c [ 87.610075][ T5612] should_fail+0x3bc/0x514 [ 87.610820][ T5612] __should_failslab+0xbc/0x10c [ 87.611625][ T5612] should_failslab+0x10/0x28 [ 87.612359][ T5612] slab_pre_alloc_hook+0x64/0xe8 [ 87.613181][ T5612] kmem_cache_alloc_trace+0x98/0x3ec [ 87.614064][ T5612] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 87.615071][ T5612] __btrfs_unlink_inode+0x350/0xaec [ 87.615988][ T5612] btrfs_unlink+0x108/0x258 [ 87.616803][ T5612] vfs_unlink+0x2e0/0x4f4 [ 87.617524][ T5612] do_unlinkat+0x328/0x618 [ 87.618389][ T5612] __arm64_sys_unlinkat+0xe0/0xfc [ 87.619261][ T5612] invoke_syscall+0x98/0x2b0 [ 87.620083][ T5612] el0_svc_common+0x138/0x258 [ 87.620907][ T5612] do_el0_svc+0x58/0x13c [ 87.621637][ T5612] el0_svc+0x78/0x1d0 [ 87.622301][ T5612] el0t_64_sync_handler+0xcc/0xe4 [ 87.623153][ T5612] el0t_64_sync+0x1a0/0x1a4 [ 87.625303][ T5612] ------------[ cut here ]------------ [ 87.626326][ T5612] WARNING: CPU: 1 PID: 5612 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 87.627902][ T5612] Modules linked in: [ 87.628519][ T5612] CPU: 1 PID: 5612 Comm: syz.0.45 Tainted: G W syzkaller #0 [ 87.629954][ T5612] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 87.631535][ T5612] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 87.632853][ T5612] pc : __btrfs_unlink_inode+0x904/0xaec [ 87.633803][ T5612] lr : __btrfs_unlink_inode+0x904/0xaec [ 87.634660][ T5612] sp : ffff800022767a60 [ 87.635333][ T5612] x29: ffff800022767b10 x28: ffff0000c2fb8000 x27: ffff0000dd7f6c10 [ 87.636576][ T5612] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000ce495bb0 [ 87.637980][ T5612] x23: ffff7000044ecf54 x22: dfff800000000000 x21: ffff0000e2f43ae0 [ 87.639393][ T5612] x20: ffff0000dd627e18 x19: 1fffe0001bac4fc3 x18: 0000000000000001 [ 87.640747][ T5612] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 87.642170][ T5612] x14: 0000000000000001 x13: 1fffe000341f47ab x12: 0000000000ff0100 [ 87.643567][ T5612] x11: 0000000000000000 x10: 0000000000000000 x9 : 2c8c4ae523b6e300 [ 87.644974][ T5612] x8 : 2c8c4ae523b6e300 x7 : 0000000000000001 x6 : 0000000000000001 [ 87.646375][ T5612] x5 : ffff800022767378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 87.647725][ T5612] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 87.649063][ T5612] Call trace: [ 87.649625][ T5612] __btrfs_unlink_inode+0x904/0xaec [ 87.650532][ T5612] btrfs_unlink+0x108/0x258 [ 87.651262][ T5612] vfs_unlink+0x2e0/0x4f4 [ 87.651980][ T5612] do_unlinkat+0x328/0x618 [ 87.652814][ T5612] __arm64_sys_unlinkat+0xe0/0xfc [ 87.653671][ T5612] invoke_syscall+0x98/0x2b0 [ 87.654423][ T5612] el0_svc_common+0x138/0x258 [ 87.655224][ T5612] do_el0_svc+0x58/0x13c [ 87.655899][ T5612] el0_svc+0x78/0x1d0 [ 87.656597][ T5612] el0t_64_sync_handler+0xcc/0xe4 [ 87.657491][ T5612] el0t_64_sync+0x1a0/0x1a4 [ 87.658256][ T5612] irq event stamp: 80074 [ 87.658977][ T5612] hardirqs last enabled at (80073): [] __up_console_sem+0xb4/0xfc [ 87.660497][ T5612] hardirqs last disabled at (80074): [] el1_dbg+0x24/0x80 [ 87.661888][ T5612] softirqs last enabled at (80054): [] handle_softirqs+0xa40/0xbe4 [ 87.663603][ T5612] softirqs last disabled at (80033): [] __irq_exit_rcu+0x240/0x43c [ 87.665133][ T5612] ---[ end trace 27e067890dc3977e ]--- [ 87.667895][ T5612] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 87.669366][ T5612] BTRFS info (device loop0): forced readonly [ 87.843619][ T5635] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.46 (5635) [ 87.848794][ T5635] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 87.850415][ T5635] BTRFS info (device loop0): using free space tree [ 87.851465][ T5635] BTRFS info (device loop0): has skinny extents [ 87.913617][ T5635] BTRFS info (device loop0): enabling ssd optimizations [ 87.923948][ T5635] FAULT_INJECTION: forcing a failure. [ 87.923948][ T5635] name failslab, interval 1, probability 0, space 0, times 0 [ 87.927902][ T5635] CPU: 1 PID: 5635 Comm: syz.0.46 Tainted: G W syzkaller #0 [ 87.929294][ T5635] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 87.931056][ T5635] Call trace: [ 87.931608][ T5635] dump_backtrace+0x0/0x458 [ 87.932345][ T5635] show_stack+0x2c/0x3c [ 87.933033][ T5635] __dump_stack+0x30/0x40 [ 87.933768][ T5635] dump_stack_lvl+0xf4/0x15c [ 87.934496][ T5635] dump_stack+0x1c/0x5c [ 87.935202][ T5635] should_fail+0x3bc/0x514 [ 87.935941][ T5635] __should_failslab+0xbc/0x10c [ 87.936829][ T5635] should_failslab+0x10/0x28 [ 87.937607][ T5635] slab_pre_alloc_hook+0x64/0xe8 [ 87.938472][ T5635] kmem_cache_alloc_trace+0x98/0x3ec [ 87.939349][ T5635] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 87.940361][ T5635] __btrfs_unlink_inode+0x350/0xaec [ 87.941211][ T5635] btrfs_unlink+0x108/0x258 [ 87.941940][ T5635] vfs_unlink+0x2e0/0x4f4 [ 87.942726][ T5635] do_unlinkat+0x328/0x618 [ 87.943454][ T5635] __arm64_sys_unlinkat+0xe0/0xfc [ 87.944339][ T5635] invoke_syscall+0x98/0x2b0 [ 87.945160][ T5635] el0_svc_common+0x138/0x258 [ 87.946014][ T5635] do_el0_svc+0x58/0x13c [ 87.946759][ T5635] el0_svc+0x78/0x1d0 [ 87.947464][ T5635] el0t_64_sync_handler+0xcc/0xe4 [ 87.948357][ T5635] el0t_64_sync+0x1a0/0x1a4 [ 87.950484][ T5635] ------------[ cut here ]------------ [ 87.951535][ T5635] WARNING: CPU: 1 PID: 5635 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 87.953054][ T5635] Modules linked in: [ 87.953662][ T5635] CPU: 1 PID: 5635 Comm: syz.0.46 Tainted: G W syzkaller #0 [ 87.955167][ T5635] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 87.956747][ T5635] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 87.958018][ T5635] pc : __btrfs_unlink_inode+0x904/0xaec [ 87.958901][ T5635] lr : __btrfs_unlink_inode+0x904/0xaec [ 87.959802][ T5635] sp : ffff800022c47a60 [ 87.960466][ T5635] x29: ffff800022c47b10 x28: ffff0000e8fa2000 x27: ffff0000dd7f4810 [ 87.961843][ T5635] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000c9e88c60 [ 87.963103][ T5635] x23: ffff700004588f54 x22: dfff800000000000 x21: ffff0000e2f41d70 [ 87.964479][ T5635] x20: ffff0000dd627f78 x19: 1fffe0001bac4fef x18: 0000000000000001 [ 87.965759][ T5635] x17: 0000000000000000 x16: ffff800008304c04 x15: 00000000ffffffff [ 87.967058][ T5635] x14: 0000000000000001 x13: 1ffff00004588e6c x12: 0000000000ff0100 [ 87.968707][ T5635] x11: 0000000000000000 x10: 0000000000000000 x9 : 13878a1a4263d800 [ 87.970139][ T5635] x8 : 13878a1a4263d800 x7 : 0000000000000001 x6 : 0000000000000001 [ 87.971470][ T5635] x5 : ffff800022c47378 x4 : ffff80001437f3e0 x3 : ffff800008304d14 [ 87.972917][ T5635] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 87.974342][ T5635] Call trace: [ 87.974894][ T5635] __btrfs_unlink_inode+0x904/0xaec [ 87.975773][ T5635] btrfs_unlink+0x108/0x258 [ 87.976542][ T5635] vfs_unlink+0x2e0/0x4f4 [ 87.977247][ T5635] do_unlinkat+0x328/0x618 [ 87.978019][ T5635] __arm64_sys_unlinkat+0xe0/0xfc [ 87.978878][ T5635] invoke_syscall+0x98/0x2b0 [ 87.979581][ T5635] el0_svc_common+0x138/0x258 [ 87.980306][ T5635] do_el0_svc+0x58/0x13c [ 87.981042][ T5635] el0_svc+0x78/0x1d0 [ 87.981720][ T5635] el0t_64_sync_handler+0xcc/0xe4 [ 87.982561][ T5635] el0t_64_sync+0x1a0/0x1a4 [ 87.983328][ T5635] irq event stamp: 79566 [ 87.984060][ T5635] hardirqs last enabled at (79565): [] __up_console_sem+0xb4/0xfc [ 87.985700][ T5635] hardirqs last disabled at (79566): [] el1_dbg+0x24/0x80 [ 87.987190][ T5635] softirqs last enabled at (79550): [] handle_softirqs+0xa40/0xbe4 [ 87.988725][ T5635] softirqs last disabled at (79541): [] __irq_exit_rcu+0x240/0x43c [ 87.990213][ T5635] ---[ end trace 27e067890dc3977f ]--- [ 87.991285][ T5635] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 87.992795][ T5635] BTRFS info (device loop0): forced readonly [ 88.237319][ T5658] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.47 (5658) [ 88.241116][ T5658] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 88.242502][ T5658] BTRFS info (device loop0): using free space tree [ 88.244062][ T5658] BTRFS info (device loop0): has skinny extents [ 88.251452][ T5658] BTRFS info (device loop0): enabling ssd optimizations [ 88.255914][ T5658] FAULT_INJECTION: forcing a failure. [ 88.255914][ T5658] name failslab, interval 1, probability 0, space 0, times 0 [ 88.258030][ T5658] CPU: 0 PID: 5658 Comm: syz.0.47 Tainted: G W syzkaller #0 [ 88.259430][ T5658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 88.261155][ T5658] Call trace: [ 88.261649][ T5658] dump_backtrace+0x0/0x458 [ 88.262430][ T5658] show_stack+0x2c/0x3c [ 88.263133][ T5658] __dump_stack+0x30/0x40 [ 88.263896][ T5658] dump_stack_lvl+0xf4/0x15c [ 88.264647][ T5658] dump_stack+0x1c/0x5c [ 88.265326][ T5658] should_fail+0x3bc/0x514 [ 88.266059][ T5658] __should_failslab+0xbc/0x10c [ 88.266868][ T5658] should_failslab+0x10/0x28 [ 88.267632][ T5658] slab_pre_alloc_hook+0x64/0xe8 [ 88.268527][ T5658] kmem_cache_alloc_trace+0x98/0x3ec [ 88.269406][ T5658] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 88.270441][ T5658] __btrfs_unlink_inode+0x350/0xaec [ 88.271304][ T5658] btrfs_unlink+0x108/0x258 [ 88.272019][ T5658] vfs_unlink+0x2e0/0x4f4 [ 88.272768][ T5658] do_unlinkat+0x328/0x618 [ 88.273535][ T5658] __arm64_sys_unlinkat+0xe0/0xfc [ 88.274398][ T5658] invoke_syscall+0x98/0x2b0 [ 88.275207][ T5658] el0_svc_common+0x138/0x258 [ 88.276013][ T5658] do_el0_svc+0x58/0x13c [ 88.276720][ T5658] el0_svc+0x78/0x1d0 [ 88.277452][ T5658] el0t_64_sync_handler+0xcc/0xe4 [ 88.278349][ T5658] el0t_64_sync+0x1a0/0x1a4 [ 88.280759][ T5658] ------------[ cut here ]------------ [ 88.282009][ T5658] WARNING: CPU: 0 PID: 5658 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 88.283643][ T5658] Modules linked in: [ 88.284287][ T5658] CPU: 0 PID: 5658 Comm: syz.0.47 Tainted: G W syzkaller #0 [ 88.285707][ T5658] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 88.287424][ T5658] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 88.288720][ T5658] pc : __btrfs_unlink_inode+0x904/0xaec [ 88.289680][ T5658] lr : __btrfs_unlink_inode+0x904/0xaec [ 88.290622][ T5658] sp : ffff8000227b7a60 [ 88.291293][ T5658] x29: ffff8000227b7b10 x28: ffff0000ce61c000 x27: ffff0000e2e55810 [ 88.292668][ T5658] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000ec0ffc60 [ 88.294090][ T5658] x23: ffff7000044f6f54 x22: dfff800000000000 x21: ffff0000ed11a740 [ 88.295489][ T5658] x20: ffff0000df2e0948 x19: 1fffe0001be5c129 x18: 0000000000000001 [ 88.296820][ T5658] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 88.298173][ T5658] x14: 0000000000000001 x13: 1fffe000341f05ab x12: 0000000000ff0100 [ 88.299547][ T5658] x11: 0000000000000000 x10: 0000000000000000 x9 : 5ccc2d35862a9000 [ 88.300848][ T5658] x8 : 5ccc2d35862a9000 x7 : 0000000000000001 x6 : 0000000000000001 [ 88.302121][ T5658] x5 : ffff8000227b7378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 88.303387][ T5658] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 88.304804][ T5658] Call trace: [ 88.305304][ T5658] __btrfs_unlink_inode+0x904/0xaec [ 88.306240][ T5658] btrfs_unlink+0x108/0x258 [ 88.307001][ T5658] vfs_unlink+0x2e0/0x4f4 [ 88.307717][ T5658] do_unlinkat+0x328/0x618 [ 88.308491][ T5658] __arm64_sys_unlinkat+0xe0/0xfc [ 88.309387][ T5658] invoke_syscall+0x98/0x2b0 [ 88.310120][ T5658] el0_svc_common+0x138/0x258 [ 88.310895][ T5658] do_el0_svc+0x58/0x13c [ 88.311609][ T5658] el0_svc+0x78/0x1d0 [ 88.312245][ T5658] el0t_64_sync_handler+0xcc/0xe4 [ 88.313098][ T5658] el0t_64_sync+0x1a0/0x1a4 [ 88.313819][ T5658] irq event stamp: 81018 [ 88.314502][ T5658] hardirqs last enabled at (81017): [] __up_console_sem+0xb4/0xfc [ 88.316077][ T5658] hardirqs last disabled at (81018): [] el1_dbg+0x24/0x80 [ 88.317527][ T5658] softirqs last enabled at (81008): [] handle_softirqs+0xa40/0xbe4 [ 88.319129][ T5658] softirqs last disabled at (80899): [] __irq_exit_rcu+0x240/0x43c [ 88.320748][ T5658] ---[ end trace 27e067890dc39780 ]--- [ 88.323612][ T5658] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 88.325172][ T5658] BTRFS info (device loop0): forced readonly [ 88.554251][ T5680] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz.0.48 (5680) [ 88.560016][ T5680] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 88.561541][ T5680] BTRFS info (device loop0): using free space tree [ 88.562608][ T5680] BTRFS info (device loop0): has skinny extents [ 88.570340][ T5680] BTRFS info (device loop0): enabling ssd optimizations [ 88.574838][ T5680] FAULT_INJECTION: forcing a failure. [ 88.574838][ T5680] name failslab, interval 1, probability 0, space 0, times 0 [ 88.577381][ T5680] CPU: 0 PID: 5680 Comm: syz.0.48 Tainted: G W syzkaller #0 [ 88.578739][ T5680] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 88.580365][ T5680] Call trace: [ 88.580971][ T5680] dump_backtrace+0x0/0x458 [ 88.581710][ T5680] show_stack+0x2c/0x3c [ 88.582388][ T5680] __dump_stack+0x30/0x40 [ 88.583113][ T5680] dump_stack_lvl+0xf4/0x15c [ 88.583885][ T5680] dump_stack+0x1c/0x5c [ 88.584602][ T5680] should_fail+0x3bc/0x514 [ 88.585321][ T5680] __should_failslab+0xbc/0x10c [ 88.586143][ T5680] should_failslab+0x10/0x28 [ 88.586914][ T5680] slab_pre_alloc_hook+0x64/0xe8 [ 88.587750][ T5680] kmem_cache_alloc_trace+0x98/0x3ec [ 88.588676][ T5680] btrfs_delete_delayed_dir_index+0x22c/0x56c [ 88.589686][ T5680] __btrfs_unlink_inode+0x350/0xaec [ 88.590551][ T5680] btrfs_unlink+0x108/0x258 [ 88.591296][ T5680] vfs_unlink+0x2e0/0x4f4 [ 88.592041][ T5680] do_unlinkat+0x328/0x618 [ 88.592772][ T5680] __arm64_sys_unlinkat+0xe0/0xfc [ 88.593588][ T5680] invoke_syscall+0x98/0x2b0 [ 88.594314][ T5680] el0_svc_common+0x138/0x258 [ 88.595085][ T5680] do_el0_svc+0x58/0x13c [ 88.595755][ T5680] el0_svc+0x78/0x1d0 [ 88.596367][ T5680] el0t_64_sync_handler+0xcc/0xe4 [ 88.597140][ T5680] el0t_64_sync+0x1a0/0x1a4 [ 88.600333][ T5680] ------------[ cut here ]------------ [ 88.601374][ T5680] WARNING: CPU: 0 PID: 5680 at fs/btrfs/inode.c:4182 __btrfs_unlink_inode+0x904/0xaec [ 88.602988][ T5680] Modules linked in: [ 88.603658][ T5680] CPU: 0 PID: 5680 Comm: syz.0.48 Tainted: G W syzkaller #0 [ 88.605082][ T5680] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 88.606793][ T5680] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 88.608102][ T5680] pc : __btrfs_unlink_inode+0x904/0xaec [ 88.609045][ T5680] lr : __btrfs_unlink_inode+0x904/0xaec [ 88.610068][ T5680] sp : ffff800022ef7a60 [ 88.610809][ T5680] x29: ffff800022ef7b10 x28: ffff0000dbda4000 x27: ffff0000e2e55410 [ 88.612097][ T5680] x26: 0000000000000100 x25: 00000000fffffff4 x24: ffff0000ecd95160 [ 88.613362][ T5680] x23: ffff7000045def54 x22: dfff800000000000 x21: ffff0000ed11c4b0 [ 88.614657][ T5680] x20: ffff0000df2e0aa8 x19: 1fffe0001be5c155 x18: 0000000000000001 [ 88.615886][ T5680] x17: 0000000000000000 x16: ffff80001125f77c x15: 00000000ffffffff [ 88.617127][ T5680] x14: 0000000000000001 x13: 1fffe000341f05ab x12: 0000000000ff0100 [ 88.618431][ T5680] x11: 0000000000000000 x10: 0000000000000000 x9 : c90dd3c2afa49500 [ 88.619789][ T5680] x8 : c90dd3c2afa49500 x7 : 0000000000000001 x6 : 0000000000000001 [ 88.621203][ T5680] x5 : ffff800022ef7378 x4 : ffff80001437f3e0 x3 : ffff80000850932c [ 88.622614][ T5680] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 88.623919][ T5680] Call trace: [ 88.624438][ T5680] __btrfs_unlink_inode+0x904/0xaec [ 88.625310][ T5680] btrfs_unlink+0x108/0x258 [ 88.626067][ T5680] vfs_unlink+0x2e0/0x4f4 [ 88.626816][ T5680] do_unlinkat+0x328/0x618 [ 88.627512][ T5680] __arm64_sys_unlinkat+0xe0/0xfc [ 88.628377][ T5680] invoke_syscall+0x98/0x2b0 [ 88.629189][ T5680] el0_svc_common+0x138/0x258 [ 88.629920][ T5680] do_el0_svc+0x58/0x13c [ 88.630657][ T5680] el0_svc+0x78/0x1d0 [ 88.631325][ T5680] el0t_64_sync_handler+0xcc/0xe4 [ 88.632153][ T5680] el0t_64_sync+0x1a0/0x1a4 [ 88.632872][ T5680] irq event stamp: 80346 [ 88.633581][ T5680] hardirqs last enabled at (80345): [] __up_console_sem+0xb4/0xfc [ 88.635124][ T5680] hardirqs last disabled at (80346): [] el1_dbg+0x24/0x80 [ 88.636641][ T5680] softirqs last enabled at (80326): [] handle_softirqs+0xa40/0xbe4 [ 88.638199][ T5680] softirqs last disabled at (80141): [] __irq_exit_rcu+0x240/0x43c [ 88.639810][ T5680] ---[ end trace 27e067890dc39781 ]--- [ 88.642742][ T5680] BTRFS: error (device loop0) in __btrfs_unlink_inode:4182: errno=-12 Out of memory [ 88.644237][ T5680] BTRFS info (device loop0): forced readonly