[ 35.452648][ T136] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 38.000887][ T136] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 38.040615][ T136] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 38.081477][ T136] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 39.150460][ T136] device hsr_slave_0 left promiscuous mode [ 39.207918][ T136] device hsr_slave_1 left promiscuous mode [ 39.307860][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 39.309273][ T136] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 39.311254][ T136] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 39.312571][ T136] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 39.314083][ T136] device bridge_slave_1 left promiscuous mode [ 39.315490][ T136] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.359238][ T136] device bridge_slave_0 left promiscuous mode [ 39.360470][ T136] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.497873][ T136] device veth1_macvtap left promiscuous mode [ 39.498990][ T136] device veth0_macvtap left promiscuous mode [ 39.500006][ T136] device veth1_vlan left promiscuous mode [ 39.501175][ T136] device veth0_vlan left promiscuous mode [ 39.584265][ T136] team0 (unregistering): Port device team_slave_1 removed [ 39.590028][ T136] team0 (unregistering): Port device team_slave_0 removed [ 39.593906][ T136] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 39.631303][ T136] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 39.731090][ T136] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.1.142' (ED25519) to the list of known hosts. 1970/01/01 00:00:39 ignoring optional flag "type"="gce" 1970/01/01 00:00:40 parsed 1 programs 1970/01/01 00:00:40 executed programs: 0 [ 40.196836][ T4252] chnl_net:caif_netlink_parms(): no params data found [ 40.213301][ T4252] bridge0: port 1(bridge_slave_0) entered blocking state [ 40.214556][ T4252] bridge0: port 1(bridge_slave_0) entered disabled state [ 40.216154][ T4252] device bridge_slave_0 entered promiscuous mode [ 40.218803][ T4252] bridge0: port 2(bridge_slave_1) entered blocking state [ 40.220118][ T4252] bridge0: port 2(bridge_slave_1) entered disabled state [ 40.221663][ T4252] device bridge_slave_1 entered promiscuous mode [ 40.230062][ T4252] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 40.232605][ T4252] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 40.240821][ T4252] team0: Port device team_slave_0 added [ 40.242646][ T4252] team0: Port device team_slave_1 added [ 40.249775][ T4252] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 40.250943][ T4252] 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. [ 40.255177][ T4252] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 40.257660][ T4252] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 40.259602][ T4252] 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. [ 40.263613][ T4252] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 40.319103][ T4252] device hsr_slave_0 entered promiscuous mode [ 40.367918][ T4252] device hsr_slave_1 entered promiscuous mode [ 41.003823][ T4252] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 41.029079][ T4252] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 41.089004][ T4252] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 41.129093][ T4252] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 41.202803][ T4252] 8021q: adding VLAN 0 to HW filter on device bond0 [ 41.208922][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 41.210471][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.213435][ T4252] 8021q: adding VLAN 0 to HW filter on device team0 [ 41.215826][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 41.217350][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.219217][ T571] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.220431][ T571] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.221976][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 41.225600][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 41.227313][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.229247][ T571] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.230381][ T571] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.235647][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 41.237432][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 41.240118][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 41.241945][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 41.246717][ T4252] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 41.249410][ T4252] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 41.258583][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 41.260323][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 41.279045][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 41.280649][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 41.282129][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 41.284064][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 41.285618][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 41.290386][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 41.341608][ T4252] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 41.348445][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 41.349818][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 41.351079][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 41.352862][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 41.361538][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 41.363144][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 41.365020][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 41.366540][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 41.370685][ T4252] device veth0_vlan entered promiscuous mode [ 41.373675][ T4252] device veth1_vlan entered promiscuous mode [ 41.380779][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 41.382312][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 41.383801][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 41.385607][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 41.389802][ T4252] device veth0_macvtap entered promiscuous mode [ 41.392125][ T4252] device veth1_macvtap entered promiscuous mode [ 41.397844][ T4252] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 41.399073][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 41.400638][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 41.402117][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 41.403673][ T148] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 41.410335][ T4252] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 41.411661][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 41.413254][ T571] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 41.416097][ T4252] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 41.417419][ T4252] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 41.419349][ T4252] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 41.420776][ T4252] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 41.571439][ T4395] loop0: detected capacity change from 0 to 32768 [ 41.581794][ T4395] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4395) [ 41.595862][ T4395] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 41.599062][ T4395] BTRFS info (device loop0): enabling auto defrag [ 41.602509][ T4395] BTRFS info (device loop0): enabling disk space caching [ 41.603527][ T4395] BTRFS info (device loop0): disabling tree log [ 41.611916][ T4395] BTRFS info (device loop0): force clearing of disk cache [ 41.613188][ T4395] BTRFS info (device loop0): force zlib compression, level 3 [ 41.614540][ T4395] BTRFS info (device loop0): disabling disk space caching [ 41.615754][ T4395] BTRFS info (device loop0): has skinny extents [ 41.665665][ T4395] BTRFS info (device loop0): enabling ssd optimizations [ 41.668260][ T4395] BTRFS info (device loop0): clearing free space tree [ 41.669517][ T4395] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 41.671267][ T4395] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 41.690862][ T4395] FAULT_INJECTION: forcing a failure. [ 41.690862][ T4395] name failslab, interval 1, probability 0, space 0, times 1 [ 41.693255][ T4395] CPU: 0 PID: 4395 Comm: syz-executor.0 Not tainted syzkaller #0 [ 41.694473][ T4395] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 41.696170][ T4395] Call trace: [ 41.696728][ T4395] dump_backtrace+0x0/0x458 [ 41.697469][ T4395] show_stack+0x2c/0x3c [ 41.698156][ T4395] __dump_stack+0x30/0x40 [ 41.698903][ T4395] dump_stack_lvl+0xf4/0x15c [ 41.699650][ T4395] dump_stack+0x1c/0x5c [ 41.700311][ T4395] should_fail+0x3c8/0x520 [ 41.701057][ T4395] __should_failslab+0xbc/0x10c [ 41.701882][ T4395] should_failslab+0x10/0x28 [ 41.702648][ T4395] slab_pre_alloc_hook+0x64/0xe8 [ 41.703484][ T4395] kmem_cache_alloc+0x94/0x3d8 [ 41.704288][ T4395] btrfs_alloc_path+0x5c/0x68 [ 41.705114][ T4395] __btrfs_free_extent+0x1a4/0x1ae0 [ 41.705992][ T4395] __btrfs_run_delayed_refs+0xc00/0x3484 [ 41.706937][ T4395] btrfs_run_delayed_refs+0x11c/0x460 [ 41.707814][ T4395] btrfs_commit_transaction+0x1d8/0x30ac [ 41.708841][ T4395] btrfs_sync_fs+0x240/0xb2c [ 41.709631][ T4395] sync_filesystem+0x1a0/0x218 [ 41.710432][ T4395] btrfs_remount+0x190/0x12ac [ 41.711226][ T4395] legacy_reconfigure+0xfc/0x114 [ 41.712074][ T4395] reconfigure_super+0x1d0/0x6c4 [ 41.712942][ T4395] path_mount+0xd20/0xfe8 [ 41.713714][ T4395] __arm64_sys_mount+0x488/0x5f8 [ 41.714528][ T4395] invoke_syscall+0x98/0x28c [ 41.715315][ T4395] el0_svc_common+0x13c/0x258 [ 41.716069][ T4395] do_el0_svc+0x5c/0x140 [ 41.716816][ T4395] el0_svc+0x78/0x1d0 [ 41.717507][ T4395] el0t_64_sync_handler+0xcc/0xe4 [ 41.718390][ T4395] el0t_64_sync+0x1a0/0x1a4 [ 41.720668][ T4395] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 41.722992][ T4395] ------------[ cut here ]------------ [ 41.723975][ T4395] WARNING: CPU: 0 PID: 4395 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 41.725809][ T4395] Modules linked in: [ 41.726470][ T4395] CPU: 0 PID: 4395 Comm: syz-executor.0 Not tainted syzkaller #0 [ 41.727808][ T4395] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 41.729584][ T4395] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 41.730941][ T4395] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 41.731898][ T4395] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 41.732829][ T4395] sp : ffff80001f2f7570 [ 41.733552][ T4395] x29: ffff80001f2f7580 x28: ffff0000c177a000 x27: dfff800000000000 [ 41.734964][ T4395] x26: dfff800000000000 x25: ffff0000dedf3160 x24: 1fffe0001bdbe637 [ 41.736350][ T4395] x23: ffff0000dedf31b8 x22: 00000000fffffff4 x21: 0000000000000000 [ 41.737729][ T4395] x20: 00000000fffffff4 x19: ffff0000dedf3160 x18: 0000000000000000 [ 41.739370][ T4395] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 41.740908][ T4395] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 41.742544][ T4395] x11: ff8080000830061c x10: 0000000000000000 x9 : be438c26ca6b2600 [ 41.744122][ T4395] x8 : be438c26ca6b2600 x7 : 0000000000000001 x6 : 0000000000000001 [ 41.745579][ T4395] x5 : ffff80001f2f6e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 41.747064][ T4395] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 41.748499][ T4395] Call trace: [ 41.749115][ T4395] btrfs_run_delayed_refs+0x3e8/0x460 [ 41.750054][ T4395] btrfs_commit_transaction+0x1d8/0x30ac [ 41.750993][ T4395] btrfs_sync_fs+0x240/0xb2c [ 41.751906][ T4395] sync_filesystem+0x1a0/0x218 [ 41.752883][ T4395] btrfs_remount+0x190/0x12ac [ 41.753713][ T4395] legacy_reconfigure+0xfc/0x114 [ 41.754581][ T4395] reconfigure_super+0x1d0/0x6c4 [ 41.755460][ T4395] path_mount+0xd20/0xfe8 [ 41.756166][ T4395] __arm64_sys_mount+0x488/0x5f8 [ 41.756978][ T4395] invoke_syscall+0x98/0x28c [ 41.757797][ T4395] el0_svc_common+0x13c/0x258 [ 41.758602][ T4395] do_el0_svc+0x5c/0x140 [ 41.759449][ T4395] el0_svc+0x78/0x1d0 [ 41.760137][ T4395] el0t_64_sync_handler+0xcc/0xe4 [ 41.761013][ T4395] el0t_64_sync+0x1a0/0x1a4 [ 41.761761][ T4395] irq event stamp: 81942 [ 41.762480][ T4395] hardirqs last enabled at (81941): [] __up_console_sem+0xb4/0xfc [ 41.764122][ T4395] hardirqs last disabled at (81942): [] el1_dbg+0x24/0x80 [ 41.765629][ T4395] softirqs last enabled at (81894): [] handle_softirqs+0xa70/0xc14 [ 41.767327][ T4395] softirqs last disabled at (81821): [] __irq_exit_rcu+0x240/0x434 [ 41.768909][ T4395] ---[ end trace 811c90d7563d9f72 ]--- [ 41.771249][ T4395] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 41.772975][ T4395] BTRFS info (device loop0): forced readonly [ 41.774899][ T4395] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 41.984340][ T4475] loop0: detected capacity change from 0 to 32768 [ 41.987157][ T4475] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4475) [ 41.993656][ T4475] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 41.995339][ T4475] BTRFS info (device loop0): enabling auto defrag [ 41.996514][ T4475] BTRFS info (device loop0): enabling disk space caching [ 41.999095][ T4475] BTRFS info (device loop0): disabling tree log [ 42.000060][ T4475] BTRFS info (device loop0): force clearing of disk cache [ 42.002310][ T4475] BTRFS info (device loop0): force zlib compression, level 3 [ 42.004738][ T4475] BTRFS info (device loop0): disabling disk space caching [ 42.006884][ T4475] BTRFS info (device loop0): has skinny extents [ 42.071640][ T4475] BTRFS info (device loop0): enabling ssd optimizations [ 42.073783][ T4475] BTRFS info (device loop0): clearing free space tree [ 42.075158][ T4475] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 42.077078][ T4475] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 42.087624][ T4475] FAULT_INJECTION: forcing a failure. [ 42.087624][ T4475] name failslab, interval 1, probability 0, space 0, times 0 [ 42.091069][ T4475] CPU: 0 PID: 4475 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 42.092634][ T4475] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 42.094288][ T4475] Call trace: [ 42.094841][ T4475] dump_backtrace+0x0/0x458 [ 42.095607][ T4475] show_stack+0x2c/0x3c [ 42.096310][ T4475] __dump_stack+0x30/0x40 [ 42.097025][ T4475] dump_stack_lvl+0xf4/0x15c [ 42.097816][ T4475] dump_stack+0x1c/0x5c [ 42.098576][ T4475] should_fail+0x3c8/0x520 [ 42.099367][ T4475] __should_failslab+0xbc/0x10c [ 42.100256][ T4475] should_failslab+0x10/0x28 [ 42.101006][ T4475] slab_pre_alloc_hook+0x64/0xe8 [ 42.101848][ T4475] kmem_cache_alloc+0x94/0x3d8 [ 42.102696][ T4475] start_transaction+0x530/0x1438 [ 42.103490][ T4475] btrfs_attach_transaction_barrier+0x30/0xac [ 42.104469][ T4475] btrfs_sync_fs+0x13c/0xb2c [ 42.105255][ T4475] sync_filesystem+0x1a0/0x218 [ 42.106037][ T4475] btrfs_remount+0x190/0x12ac [ 42.106817][ T4475] legacy_reconfigure+0xfc/0x114 [ 42.107611][ T4475] reconfigure_super+0x1d0/0x6c4 [ 42.108398][ T4475] path_mount+0xd20/0xfe8 [ 42.109081][ T4475] __arm64_sys_mount+0x488/0x5f8 [ 42.109878][ T4475] invoke_syscall+0x98/0x28c [ 42.110571][ T4475] el0_svc_common+0x13c/0x258 [ 42.111315][ T4475] do_el0_svc+0x5c/0x140 [ 42.112001][ T4475] el0_svc+0x78/0x1d0 [ 42.112599][ T4475] el0t_64_sync_handler+0xcc/0xe4 [ 42.113382][ T4475] el0t_64_sync+0x1a0/0x1a4 [ 42.168346][ T13] Bluetooth: hci0: command 0x0409 tx timeout [ 42.255686][ T4523] loop0: detected capacity change from 0 to 32768 [ 42.260168][ T4523] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4523) [ 42.263500][ T4523] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 42.264992][ T4523] BTRFS info (device loop0): enabling auto defrag [ 42.266125][ T4523] BTRFS info (device loop0): enabling disk space caching [ 42.267397][ T4523] BTRFS info (device loop0): disabling tree log [ 42.268969][ T4523] BTRFS info (device loop0): force clearing of disk cache [ 42.270176][ T4523] BTRFS info (device loop0): force zlib compression, level 3 [ 42.271452][ T4523] BTRFS info (device loop0): disabling disk space caching [ 42.272667][ T4523] BTRFS info (device loop0): has skinny extents [ 42.280931][ T4523] BTRFS info (device loop0): enabling ssd optimizations [ 42.282596][ T4523] BTRFS info (device loop0): clearing free space tree [ 42.283787][ T4523] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 42.285369][ T4523] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 42.291399][ T4523] FAULT_INJECTION: forcing a failure. [ 42.291399][ T4523] name failslab, interval 1, probability 0, space 0, times 0 [ 42.293595][ T4523] CPU: 1 PID: 4523 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 42.295072][ T4523] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 42.296621][ T4523] Call trace: [ 42.297130][ T4523] dump_backtrace+0x0/0x458 [ 42.297904][ T4523] show_stack+0x2c/0x3c [ 42.298640][ T4523] __dump_stack+0x30/0x40 [ 42.299366][ T4523] dump_stack_lvl+0xf4/0x15c [ 42.300172][ T4523] dump_stack+0x1c/0x5c [ 42.300862][ T4523] should_fail+0x3c8/0x520 [ 42.301643][ T4523] __should_failslab+0xbc/0x10c [ 42.302484][ T4523] should_failslab+0x10/0x28 [ 42.303419][ T4523] slab_pre_alloc_hook+0x64/0xe8 [ 42.304378][ T4523] kmem_cache_alloc+0x94/0x3d8 [ 42.305220][ T4523] start_transaction+0x530/0x1438 [ 42.306151][ T4523] btrfs_attach_transaction_barrier+0x30/0xac [ 42.307189][ T4523] btrfs_sync_fs+0x13c/0xb2c [ 42.307992][ T4523] sync_filesystem+0x1a0/0x218 [ 42.308830][ T4523] btrfs_remount+0x190/0x12ac [ 42.309851][ T4523] legacy_reconfigure+0xfc/0x114 [ 42.310646][ T4523] reconfigure_super+0x1d0/0x6c4 [ 42.311530][ T4523] path_mount+0xd20/0xfe8 [ 42.312324][ T4523] __arm64_sys_mount+0x488/0x5f8 [ 42.313148][ T4523] invoke_syscall+0x98/0x28c [ 42.313920][ T4523] el0_svc_common+0x13c/0x258 [ 42.314669][ T4523] do_el0_svc+0x5c/0x140 [ 42.315373][ T4523] el0_svc+0x78/0x1d0 [ 42.316093][ T4523] el0t_64_sync_handler+0xcc/0xe4 [ 42.316982][ T4523] el0t_64_sync+0x1a0/0x1a4 [ 42.499908][ T4547] loop0: detected capacity change from 0 to 32768 [ 42.502294][ T4547] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4547) [ 42.505515][ T4547] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 42.506988][ T4547] BTRFS info (device loop0): enabling auto defrag [ 42.508583][ T4547] BTRFS info (device loop0): enabling disk space caching [ 42.509907][ T4547] BTRFS info (device loop0): disabling tree log [ 42.511061][ T4547] BTRFS info (device loop0): force clearing of disk cache [ 42.512285][ T4547] BTRFS info (device loop0): force zlib compression, level 3 [ 42.513635][ T4547] BTRFS info (device loop0): disabling disk space caching [ 42.514878][ T4547] BTRFS info (device loop0): has skinny extents [ 42.530415][ T4547] BTRFS info (device loop0): enabling ssd optimizations [ 42.532169][ T4547] BTRFS info (device loop0): clearing free space tree [ 42.533508][ T4547] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 42.535359][ T4547] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 42.542477][ T4547] FAULT_INJECTION: forcing a failure. [ 42.542477][ T4547] name failslab, interval 1, probability 0, space 0, times 0 [ 42.544913][ T4547] CPU: 0 PID: 4547 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 42.546713][ T4547] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 42.548516][ T4547] Call trace: [ 42.549088][ T4547] dump_backtrace+0x0/0x458 [ 42.549828][ T4547] show_stack+0x2c/0x3c [ 42.550542][ T4547] __dump_stack+0x30/0x40 [ 42.551273][ T4547] dump_stack_lvl+0xf4/0x15c [ 42.552008][ T4547] dump_stack+0x1c/0x5c [ 42.552675][ T4547] should_fail+0x3c8/0x520 [ 42.553386][ T4547] __should_failslab+0xbc/0x10c [ 42.554244][ T4547] should_failslab+0x10/0x28 [ 42.555011][ T4547] slab_pre_alloc_hook+0x64/0xe8 [ 42.555797][ T4547] kmem_cache_alloc+0x94/0x3d8 [ 42.556560][ T4547] btrfs_alloc_path+0x5c/0x68 [ 42.557368][ T4547] __btrfs_free_extent+0x1a4/0x1ae0 [ 42.558275][ T4547] __btrfs_run_delayed_refs+0xc00/0x3484 [ 42.559258][ T4547] btrfs_run_delayed_refs+0x11c/0x460 [ 42.560168][ T4547] btrfs_commit_transaction+0x1d8/0x30ac [ 42.561117][ T4547] btrfs_sync_fs+0x240/0xb2c [ 42.561877][ T4547] sync_filesystem+0x1a0/0x218 [ 42.562667][ T4547] btrfs_remount+0x190/0x12ac [ 42.563480][ T4547] legacy_reconfigure+0xfc/0x114 [ 42.564311][ T4547] reconfigure_super+0x1d0/0x6c4 [ 42.565127][ T4547] path_mount+0xd20/0xfe8 [ 42.565854][ T4547] __arm64_sys_mount+0x488/0x5f8 [ 42.566695][ T4547] invoke_syscall+0x98/0x28c [ 42.567451][ T4547] el0_svc_common+0x13c/0x258 [ 42.568319][ T4547] do_el0_svc+0x5c/0x140 [ 42.569116][ T4547] el0_svc+0x78/0x1d0 [ 42.569875][ T4547] el0t_64_sync_handler+0xcc/0xe4 [ 42.570802][ T4547] el0t_64_sync+0x1a0/0x1a4 [ 42.573093][ T4547] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 42.575311][ T4547] ------------[ cut here ]------------ [ 42.576339][ T4547] WARNING: CPU: 1 PID: 4547 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 42.578042][ T4547] Modules linked in: [ 42.578710][ T4547] CPU: 1 PID: 4547 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 42.580321][ T4547] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 42.582228][ T4547] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 42.583558][ T4547] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 42.584519][ T4547] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 42.585526][ T4547] sp : ffff80001f767570 [ 42.586247][ T4547] x29: ffff80001f767580 x28: ffff0000c9f63000 x27: dfff800000000000 [ 42.587634][ T4547] x26: dfff800000000000 x25: ffff0000dedf3580 x24: 1fffe0001bdbe6bb [ 42.588990][ T4547] x23: ffff0000dedf35d8 x22: 00000000fffffff4 x21: 0000000000000000 [ 42.590401][ T4547] x20: 00000000fffffff4 x19: ffff0000dedf3580 x18: 0000000000000000 [ 42.592041][ T4547] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 42.593685][ T4547] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 42.595277][ T4547] x11: ff8080000830061c x10: 0000000000000000 x9 : 540292f9d0444e00 [ 42.596824][ T4547] x8 : 540292f9d0444e00 x7 : 0000000000000001 x6 : 0000000000000001 [ 42.598248][ T4547] x5 : ffff80001f766e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 42.599700][ T4547] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 42.601183][ T4547] Call trace: [ 42.601779][ T4547] btrfs_run_delayed_refs+0x3e8/0x460 [ 42.602784][ T4547] btrfs_commit_transaction+0x1d8/0x30ac [ 42.603919][ T4547] btrfs_sync_fs+0x240/0xb2c [ 42.604763][ T4547] sync_filesystem+0x1a0/0x218 [ 42.605737][ T4547] btrfs_remount+0x190/0x12ac [ 42.606669][ T4547] legacy_reconfigure+0xfc/0x114 [ 42.607655][ T4547] reconfigure_super+0x1d0/0x6c4 [ 42.608607][ T4547] path_mount+0xd20/0xfe8 [ 42.609439][ T4547] __arm64_sys_mount+0x488/0x5f8 [ 42.610355][ T4547] invoke_syscall+0x98/0x28c [ 42.611178][ T4547] el0_svc_common+0x13c/0x258 [ 42.611955][ T4547] do_el0_svc+0x5c/0x140 [ 42.612788][ T4547] el0_svc+0x78/0x1d0 [ 42.613527][ T4547] el0t_64_sync_handler+0xcc/0xe4 [ 42.614491][ T4547] el0t_64_sync+0x1a0/0x1a4 [ 42.615338][ T4547] irq event stamp: 79374 [ 42.616077][ T4547] hardirqs last enabled at (79373): [] __up_console_sem+0xb4/0xfc [ 42.617694][ T4547] hardirqs last disabled at (79374): [] el1_dbg+0x24/0x80 [ 42.619246][ T4547] softirqs last enabled at (79342): [] handle_softirqs+0xa70/0xc14 [ 42.620870][ T4547] softirqs last disabled at (79249): [] __irq_exit_rcu+0x240/0x434 [ 42.622545][ T4547] ---[ end trace 811c90d7563d9f73 ]--- [ 42.624065][ T4547] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 42.625700][ T4547] BTRFS info (device loop0): forced readonly [ 42.626876][ T4547] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 42.808712][ T4577] loop0: detected capacity change from 0 to 32768 [ 42.811733][ T4577] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4577) [ 42.814851][ T4577] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 42.816508][ T4577] BTRFS info (device loop0): enabling auto defrag [ 42.817660][ T4577] BTRFS info (device loop0): enabling disk space caching [ 42.818989][ T4577] BTRFS info (device loop0): disabling tree log [ 42.819999][ T4577] BTRFS info (device loop0): force clearing of disk cache [ 42.821284][ T4577] BTRFS info (device loop0): force zlib compression, level 3 [ 42.822817][ T4577] BTRFS info (device loop0): disabling disk space caching [ 42.824235][ T4577] BTRFS info (device loop0): has skinny extents [ 42.832617][ T4577] BTRFS info (device loop0): enabling ssd optimizations [ 42.834505][ T4577] BTRFS info (device loop0): clearing free space tree [ 42.835805][ T4577] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 42.837496][ T4577] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 42.844009][ T4577] FAULT_INJECTION: forcing a failure. [ 42.844009][ T4577] name failslab, interval 1, probability 0, space 0, times 0 [ 42.846386][ T4577] CPU: 1 PID: 4577 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 42.847817][ T4577] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 42.849513][ T4577] Call trace: [ 42.850061][ T4577] dump_backtrace+0x0/0x458 [ 42.850857][ T4577] show_stack+0x2c/0x3c [ 42.851543][ T4577] __dump_stack+0x30/0x40 [ 42.852257][ T4577] dump_stack_lvl+0xf4/0x15c [ 42.853011][ T4577] dump_stack+0x1c/0x5c [ 42.853723][ T4577] should_fail+0x3c8/0x520 [ 42.854461][ T4577] __should_failslab+0xbc/0x10c [ 42.855279][ T4577] should_failslab+0x10/0x28 [ 42.856023][ T4577] slab_pre_alloc_hook+0x64/0xe8 [ 42.856843][ T4577] kmem_cache_alloc+0x94/0x3d8 [ 42.857612][ T4577] start_transaction+0x530/0x1438 [ 42.858454][ T4577] btrfs_attach_transaction_barrier+0x30/0xac [ 42.859479][ T4577] btrfs_sync_fs+0x13c/0xb2c [ 42.860237][ T4577] sync_filesystem+0x1a0/0x218 [ 42.861005][ T4577] btrfs_remount+0x190/0x12ac [ 42.861831][ T4577] legacy_reconfigure+0xfc/0x114 [ 42.862641][ T4577] reconfigure_super+0x1d0/0x6c4 [ 42.863480][ T4577] path_mount+0xd20/0xfe8 [ 42.864162][ T4577] __arm64_sys_mount+0x488/0x5f8 [ 42.865034][ T4577] invoke_syscall+0x98/0x28c [ 42.865828][ T4577] el0_svc_common+0x13c/0x258 [ 42.866600][ T4577] do_el0_svc+0x5c/0x140 [ 42.867317][ T4577] el0_svc+0x78/0x1d0 [ 42.867992][ T4577] el0t_64_sync_handler+0xcc/0xe4 [ 42.868803][ T4577] el0t_64_sync+0x1a0/0x1a4 [ 43.050316][ T4598] loop0: detected capacity change from 0 to 32768 [ 43.054433][ T4598] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4598) [ 43.062040][ T4598] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 43.063864][ T4598] BTRFS info (device loop0): enabling auto defrag [ 43.065054][ T4598] BTRFS info (device loop0): enabling disk space caching [ 43.066283][ T4598] BTRFS info (device loop0): disabling tree log [ 43.067501][ T4598] BTRFS info (device loop0): force clearing of disk cache [ 43.068967][ T4598] BTRFS info (device loop0): force zlib compression, level 3 [ 43.070147][ T4598] BTRFS info (device loop0): disabling disk space caching [ 43.071400][ T4598] BTRFS info (device loop0): has skinny extents [ 43.094021][ T4598] BTRFS info (device loop0): enabling ssd optimizations [ 43.095762][ T4598] BTRFS info (device loop0): clearing free space tree [ 43.097127][ T4598] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 43.099277][ T4598] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 43.105044][ T4598] FAULT_INJECTION: forcing a failure. [ 43.105044][ T4598] name failslab, interval 1, probability 0, space 0, times 0 [ 43.107210][ T4598] CPU: 0 PID: 4598 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 43.108786][ T4598] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 43.110611][ T4598] Call trace: [ 43.111270][ T4598] dump_backtrace+0x0/0x458 [ 43.112159][ T4598] show_stack+0x2c/0x3c [ 43.112945][ T4598] __dump_stack+0x30/0x40 [ 43.113745][ T4598] dump_stack_lvl+0xf4/0x15c [ 43.114623][ T4598] dump_stack+0x1c/0x5c [ 43.115427][ T4598] should_fail+0x3c8/0x520 [ 43.116279][ T4598] __should_failslab+0xbc/0x10c [ 43.117274][ T4598] should_failslab+0x10/0x28 [ 43.118150][ T4598] slab_pre_alloc_hook+0x64/0xe8 [ 43.119133][ T4598] kmem_cache_alloc+0x94/0x3d8 [ 43.120076][ T4598] start_transaction+0x530/0x1438 [ 43.121073][ T4598] btrfs_attach_transaction_barrier+0x30/0xac [ 43.122215][ T4598] btrfs_sync_fs+0x13c/0xb2c [ 43.123101][ T4598] sync_filesystem+0x1a0/0x218 [ 43.123966][ T4598] btrfs_remount+0x190/0x12ac [ 43.124795][ T4598] legacy_reconfigure+0xfc/0x114 [ 43.125628][ T4598] reconfigure_super+0x1d0/0x6c4 [ 43.126427][ T4598] path_mount+0xd20/0xfe8 [ 43.127113][ T4598] __arm64_sys_mount+0x488/0x5f8 [ 43.127949][ T4598] invoke_syscall+0x98/0x28c [ 43.128780][ T4598] el0_svc_common+0x13c/0x258 [ 43.129559][ T4598] do_el0_svc+0x5c/0x140 [ 43.130308][ T4598] el0_svc+0x78/0x1d0 [ 43.130972][ T4598] el0t_64_sync_handler+0xcc/0xe4 [ 43.131820][ T4598] el0t_64_sync+0x1a0/0x1a4 [ 43.306798][ T4619] loop0: detected capacity change from 0 to 32768 [ 43.315503][ T4619] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4619) [ 43.323918][ T4619] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 43.325304][ T4619] BTRFS info (device loop0): enabling auto defrag [ 43.326290][ T4619] BTRFS info (device loop0): enabling disk space caching [ 43.327373][ T4619] BTRFS info (device loop0): disabling tree log [ 43.328492][ T4619] BTRFS info (device loop0): force clearing of disk cache [ 43.329826][ T4619] BTRFS info (device loop0): force zlib compression, level 3 [ 43.331244][ T4619] BTRFS info (device loop0): disabling disk space caching [ 43.332497][ T4619] BTRFS info (device loop0): has skinny extents [ 43.340898][ T4619] BTRFS info (device loop0): enabling ssd optimizations [ 43.342589][ T4619] BTRFS info (device loop0): clearing free space tree [ 43.343948][ T4619] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 43.345714][ T4619] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 43.353067][ T4619] FAULT_INJECTION: forcing a failure. [ 43.353067][ T4619] name failslab, interval 1, probability 0, space 0, times 0 [ 43.355136][ T4619] CPU: 0 PID: 4619 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 43.356761][ T4619] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 43.358371][ T4619] Call trace: [ 43.358915][ T4619] dump_backtrace+0x0/0x458 [ 43.359710][ T4619] show_stack+0x2c/0x3c [ 43.360380][ T4619] __dump_stack+0x30/0x40 [ 43.361108][ T4619] dump_stack_lvl+0xf4/0x15c [ 43.361896][ T4619] dump_stack+0x1c/0x5c [ 43.362589][ T4619] should_fail+0x3c8/0x520 [ 43.363308][ T4619] __should_failslab+0xbc/0x10c [ 43.364095][ T4619] should_failslab+0x10/0x28 [ 43.364878][ T4619] slab_pre_alloc_hook+0x64/0xe8 [ 43.365735][ T4619] kmem_cache_alloc+0x94/0x3d8 [ 43.366534][ T4619] btrfs_alloc_path+0x5c/0x68 [ 43.367289][ T4619] __btrfs_free_extent+0x1a4/0x1ae0 [ 43.368129][ T4619] __btrfs_run_delayed_refs+0xc00/0x3484 [ 43.369070][ T4619] btrfs_run_delayed_refs+0x11c/0x460 [ 43.370004][ T4619] btrfs_commit_transaction+0x1d8/0x30ac [ 43.370978][ T4619] btrfs_sync_fs+0x240/0xb2c [ 43.371755][ T4619] sync_filesystem+0x1a0/0x218 [ 43.372539][ T4619] btrfs_remount+0x190/0x12ac [ 43.373255][ T4619] legacy_reconfigure+0xfc/0x114 [ 43.374056][ T4619] reconfigure_super+0x1d0/0x6c4 [ 43.374899][ T4619] path_mount+0xd20/0xfe8 [ 43.375629][ T4619] __arm64_sys_mount+0x488/0x5f8 [ 43.376437][ T4619] invoke_syscall+0x98/0x28c [ 43.377121][ T4619] el0_svc_common+0x13c/0x258 [ 43.377885][ T4619] do_el0_svc+0x5c/0x140 [ 43.378606][ T4619] el0_svc+0x78/0x1d0 [ 43.379285][ T4619] el0t_64_sync_handler+0xcc/0xe4 [ 43.380251][ T4619] el0t_64_sync+0x1a0/0x1a4 [ 43.382871][ T4619] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 43.385037][ T4619] ------------[ cut here ]------------ [ 43.386127][ T4619] WARNING: CPU: 0 PID: 4619 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 43.387931][ T4619] Modules linked in: [ 43.388610][ T4619] CPU: 0 PID: 4619 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 43.390115][ T4619] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 43.391860][ T4619] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 43.393208][ T4619] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 43.394189][ T4619] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 43.395178][ T4619] sp : ffff80001fa07570 [ 43.395880][ T4619] x29: ffff80001fa07580 x28: ffff0000c2adb000 x27: dfff800000000000 [ 43.397211][ T4619] x26: dfff800000000000 x25: ffff0000dedf39a0 x24: 1fffe0001bdbe73f [ 43.398500][ T4619] x23: ffff0000dedf39f8 x22: 00000000fffffff4 x21: 0000000000000000 [ 43.399809][ T4619] x20: 00000000fffffff4 x19: ffff0000dedf39a0 x18: 0000000000000000 [ 43.401176][ T4619] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 43.402509][ T4619] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 43.403861][ T4619] x11: ff8080000830061c x10: 0000000000000000 x9 : c15d16dd17cccf00 [ 43.405205][ T4619] x8 : c15d16dd17cccf00 x7 : 0000000000000001 x6 : 0000000000000001 [ 43.406531][ T4619] x5 : ffff80001fa06e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 43.407870][ T4619] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 43.409223][ T4619] Call trace: [ 43.409745][ T4619] btrfs_run_delayed_refs+0x3e8/0x460 [ 43.410629][ T4619] btrfs_commit_transaction+0x1d8/0x30ac [ 43.411570][ T4619] btrfs_sync_fs+0x240/0xb2c [ 43.412346][ T4619] sync_filesystem+0x1a0/0x218 [ 43.413146][ T4619] btrfs_remount+0x190/0x12ac [ 43.413941][ T4619] legacy_reconfigure+0xfc/0x114 [ 43.414755][ T4619] reconfigure_super+0x1d0/0x6c4 [ 43.415575][ T4619] path_mount+0xd20/0xfe8 [ 43.416286][ T4619] __arm64_sys_mount+0x488/0x5f8 [ 43.417074][ T4619] invoke_syscall+0x98/0x28c [ 43.417837][ T4619] el0_svc_common+0x13c/0x258 [ 43.418617][ T4619] do_el0_svc+0x5c/0x140 [ 43.419372][ T4619] el0_svc+0x78/0x1d0 [ 43.420064][ T4619] el0t_64_sync_handler+0xcc/0xe4 [ 43.420912][ T4619] el0t_64_sync+0x1a0/0x1a4 [ 43.421693][ T4619] irq event stamp: 80158 [ 43.422374][ T4619] hardirqs last enabled at (80157): [] __up_console_sem+0xb4/0xfc [ 43.423913][ T4619] hardirqs last disabled at (80158): [] el1_dbg+0x24/0x80 [ 43.425367][ T4619] softirqs last enabled at (80122): [] handle_softirqs+0xa70/0xc14 [ 43.427008][ T4619] softirqs last disabled at (80083): [] __irq_exit_rcu+0x240/0x434 [ 43.428557][ T4619] ---[ end trace 811c90d7563d9f74 ]--- [ 43.430309][ T4619] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 43.431749][ T4619] BTRFS info (device loop0): forced readonly [ 43.432717][ T4619] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 43.594630][ T4641] loop0: detected capacity change from 0 to 32768 [ 43.598078][ T4641] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4641) [ 43.601323][ T4641] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 43.603766][ T4641] BTRFS info (device loop0): enabling auto defrag [ 43.604937][ T4641] BTRFS info (device loop0): enabling disk space caching [ 43.606306][ T4641] BTRFS info (device loop0): disabling tree log [ 43.607500][ T4641] BTRFS info (device loop0): force clearing of disk cache [ 43.609002][ T4641] BTRFS info (device loop0): force zlib compression, level 3 [ 43.610392][ T4641] BTRFS info (device loop0): disabling disk space caching [ 43.611661][ T4641] BTRFS info (device loop0): has skinny extents [ 43.622470][ T4641] BTRFS info (device loop0): enabling ssd optimizations [ 43.624259][ T4641] BTRFS info (device loop0): clearing free space tree [ 43.625627][ T4641] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 43.627386][ T4641] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 43.633866][ T4641] FAULT_INJECTION: forcing a failure. [ 43.633866][ T4641] name failslab, interval 1, probability 0, space 0, times 0 [ 43.636168][ T4641] CPU: 0 PID: 4641 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 43.637759][ T4641] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 43.639551][ T4641] Call trace: [ 43.640126][ T4641] dump_backtrace+0x0/0x458 [ 43.640958][ T4641] show_stack+0x2c/0x3c [ 43.641654][ T4641] __dump_stack+0x30/0x40 [ 43.642388][ T4641] dump_stack_lvl+0xf4/0x15c [ 43.643154][ T4641] dump_stack+0x1c/0x5c [ 43.643974][ T4641] should_fail+0x3c8/0x520 [ 43.644813][ T4641] __should_failslab+0xbc/0x10c [ 43.645732][ T4641] should_failslab+0x10/0x28 [ 43.646589][ T4641] slab_pre_alloc_hook+0x64/0xe8 [ 43.647512][ T4641] kmem_cache_alloc+0x94/0x3d8 [ 43.648395][ T4641] start_transaction+0x530/0x1438 [ 43.649309][ T4641] btrfs_attach_transaction_barrier+0x30/0xac [ 43.650308][ T4641] btrfs_sync_fs+0x13c/0xb2c [ 43.651074][ T4641] sync_filesystem+0x1a0/0x218 [ 43.651834][ T4641] btrfs_remount+0x190/0x12ac [ 43.652628][ T4641] legacy_reconfigure+0xfc/0x114 [ 43.653506][ T4641] reconfigure_super+0x1d0/0x6c4 [ 43.654338][ T4641] path_mount+0xd20/0xfe8 [ 43.655041][ T4641] __arm64_sys_mount+0x488/0x5f8 [ 43.655838][ T4641] invoke_syscall+0x98/0x28c [ 43.656573][ T4641] el0_svc_common+0x13c/0x258 [ 43.657324][ T4641] do_el0_svc+0x5c/0x140 [ 43.658028][ T4641] el0_svc+0x78/0x1d0 [ 43.658698][ T4641] el0t_64_sync_handler+0xcc/0xe4 [ 43.659457][ T4641] el0t_64_sync+0x1a0/0x1a4 [ 43.856926][ T4663] loop0: detected capacity change from 0 to 32768 [ 43.859620][ T4663] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4663) [ 43.863255][ T4663] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 43.876783][ T4663] FAULT_INJECTION: forcing a failure. [ 43.876783][ T4663] name failslab, interval 1, probability 0, space 0, times 0 [ 43.879154][ T4663] CPU: 1 PID: 4663 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 43.880703][ T4663] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 43.882341][ T4663] Call trace: [ 43.882890][ T4663] dump_backtrace+0x0/0x458 [ 43.883660][ T4663] show_stack+0x2c/0x3c [ 43.884337][ T4663] __dump_stack+0x30/0x40 [ 43.885061][ T4663] dump_stack_lvl+0xf4/0x15c [ 43.885786][ T4663] dump_stack+0x1c/0x5c [ 43.886460][ T4663] should_fail+0x3c8/0x520 [ 43.887182][ T4663] __should_failslab+0xbc/0x10c [ 43.887987][ T4663] should_failslab+0x10/0x28 [ 43.888740][ T4663] slab_pre_alloc_hook+0x64/0xe8 [ 43.889579][ T4663] kmem_cache_alloc+0x94/0x3d8 [ 43.890371][ T4663] btrfs_alloc_path+0x5c/0x68 [ 43.891203][ T4663] __btrfs_free_extent+0x1a4/0x1ae0 [ 43.892275][ T4663] __btrfs_run_delayed_refs+0xc00/0x3484 [ 43.893428][ T4663] btrfs_run_delayed_refs+0x11c/0x460 [ 43.894425][ T4663] btrfs_commit_transaction+0x1d8/0x30ac [ 43.895483][ T4663] btrfs_sync_fs+0x240/0xb2c [ 43.896313][ T4663] sync_filesystem+0x1a0/0x218 [ 43.897186][ T4663] btrfs_remount+0x190/0x12ac [ 43.898050][ T4663] legacy_reconfigure+0xfc/0x114 [ 43.898937][ T4663] reconfigure_super+0x1d0/0x6c4 [ 43.899915][ T4663] path_mount+0xd20/0xfe8 [ 43.900787][ T4663] __arm64_sys_mount+0x488/0x5f8 [ 43.901683][ T4663] invoke_syscall+0x98/0x28c [ 43.902645][ T4663] el0_svc_common+0x13c/0x258 [ 43.903612][ T4663] do_el0_svc+0x5c/0x140 [ 43.904307][ T4663] el0_svc+0x78/0x1d0 [ 43.904948][ T4663] el0t_64_sync_handler+0xcc/0xe4 [ 43.905786][ T4663] el0t_64_sync+0x1a0/0x1a4 [ 43.906645][ T4663] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 43.908859][ T4663] ------------[ cut here ]------------ [ 43.910038][ T4663] WARNING: CPU: 1 PID: 4663 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 43.911813][ T4663] Modules linked in: [ 43.912482][ T4663] CPU: 1 PID: 4663 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 43.914011][ T4663] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 43.915556][ T4663] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 43.916826][ T4663] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 43.917770][ T4663] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 43.918702][ T4663] sp : ffff80001fff7570 [ 43.919406][ T4663] x29: ffff80001fff7580 x28: ffff0000dccf8000 x27: dfff800000000000 [ 43.920974][ T4663] x26: dfff800000000000 x25: ffff0000dd6359a0 x24: 1fffe0001bac6b3f [ 43.922508][ T4663] x23: ffff0000dd6359f8 x22: 00000000fffffff4 x21: 0000000000000000 [ 43.924165][ T4663] x20: 00000000fffffff4 x19: ffff0000dd6359a0 x18: 0000000000000000 [ 43.925669][ T4663] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 43.927162][ T4663] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 43.928659][ T4663] x11: ff8080000830061c x10: 0000000000000000 x9 : 8fe70004ae16c700 [ 43.930156][ T4663] x8 : 8fe70004ae16c700 x7 : 0000000000000001 x6 : 0000000000000001 [ 43.931653][ T4663] x5 : ffff80001fff6e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 43.933198][ T4663] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 43.934756][ T4663] Call trace: [ 43.935337][ T4663] btrfs_run_delayed_refs+0x3e8/0x460 [ 43.936330][ T4663] btrfs_commit_transaction+0x1d8/0x30ac [ 43.937327][ T4663] btrfs_sync_fs+0x240/0xb2c [ 43.938108][ T4663] sync_filesystem+0x1a0/0x218 [ 43.938899][ T4663] btrfs_remount+0x190/0x12ac [ 43.939735][ T4663] legacy_reconfigure+0xfc/0x114 [ 43.940656][ T4663] reconfigure_super+0x1d0/0x6c4 [ 43.941483][ T4663] path_mount+0xd20/0xfe8 [ 43.942264][ T4663] __arm64_sys_mount+0x488/0x5f8 [ 43.943128][ T4663] invoke_syscall+0x98/0x28c [ 43.943906][ T4663] el0_svc_common+0x13c/0x258 [ 43.944694][ T4663] do_el0_svc+0x5c/0x140 [ 43.945395][ T4663] el0_svc+0x78/0x1d0 [ 43.946070][ T4663] el0t_64_sync_handler+0xcc/0xe4 [ 43.946945][ T4663] el0t_64_sync+0x1a0/0x1a4 [ 43.947718][ T4663] irq event stamp: 79552 [ 43.948436][ T4663] hardirqs last enabled at (79551): [] __up_console_sem+0xb4/0xfc [ 43.949996][ T4663] hardirqs last disabled at (79552): [] el1_dbg+0x24/0x80 [ 43.951461][ T4663] softirqs last enabled at (79522): [] handle_softirqs+0xa70/0xc14 [ 43.953023][ T4663] softirqs last disabled at (79473): [] __irq_exit_rcu+0x240/0x434 [ 43.954657][ T4663] ---[ end trace 811c90d7563d9f75 ]--- [ 43.955660][ T4663] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 43.957447][ T4663] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 44.145103][ T4684] loop0: detected capacity change from 0 to 32768 [ 44.147535][ T4684] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4684) [ 44.164170][ T4684] FAULT_INJECTION: forcing a failure. [ 44.164170][ T4684] name failslab, interval 1, probability 0, space 0, times 0 [ 44.166503][ T4684] CPU: 1 PID: 4684 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.168099][ T4684] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.169876][ T4684] Call trace: [ 44.170440][ T4684] dump_backtrace+0x0/0x458 [ 44.171204][ T4684] show_stack+0x2c/0x3c [ 44.171901][ T4684] __dump_stack+0x30/0x40 [ 44.172653][ T4684] dump_stack_lvl+0xf4/0x15c [ 44.173587][ T4684] dump_stack+0x1c/0x5c [ 44.174289][ T4684] should_fail+0x3c8/0x520 [ 44.175079][ T4684] __should_failslab+0xbc/0x10c [ 44.175996][ T4684] should_failslab+0x10/0x28 [ 44.176828][ T4684] slab_pre_alloc_hook+0x64/0xe8 [ 44.177744][ T4684] kmem_cache_alloc+0x94/0x3d8 [ 44.178639][ T4684] alloc_extent_state+0x38/0x434 [ 44.179541][ T4684] set_extent_bit+0x1ac/0x13a8 [ 44.180435][ T4684] btrfs_alloc_tree_block+0x930/0x10f0 [ 44.181371][ T4684] btrfs_force_cow_block+0x3ac/0x172c [ 44.182239][ T4684] btrfs_cow_block+0x2d4/0x674 [ 44.182986][ T4684] btrfs_search_slot+0xa10/0x1ec8 [ 44.183828][ T4684] btrfs_insert_empty_items+0x1e8/0x2b0 [ 44.184779][ T4684] __btrfs_run_delayed_refs+0xb84/0x3484 [ 44.185699][ T4684] btrfs_run_delayed_refs+0x11c/0x460 [ 44.186578][ T4684] btrfs_commit_transaction+0x1d8/0x30ac [ 44.187521][ T4684] btrfs_sync_fs+0x240/0xb2c [ 44.188359][ T4684] sync_filesystem+0x1a0/0x218 [ 44.189149][ T4684] btrfs_remount+0x190/0x12ac [ 44.189927][ T4684] legacy_reconfigure+0xfc/0x114 [ 44.190753][ T4684] reconfigure_super+0x1d0/0x6c4 [ 44.191559][ T4684] path_mount+0xd20/0xfe8 [ 44.192251][ T4684] __arm64_sys_mount+0x488/0x5f8 [ 44.193057][ T4684] invoke_syscall+0x98/0x28c [ 44.193843][ T4684] el0_svc_common+0x13c/0x258 [ 44.194592][ T4684] do_el0_svc+0x5c/0x140 [ 44.195265][ T4684] el0_svc+0x78/0x1d0 [ 44.195914][ T4684] el0t_64_sync_handler+0xcc/0xe4 [ 44.196766][ T4684] el0t_64_sync+0x1a0/0x1a4 [ 44.247944][ T4543] Bluetooth: hci0: command 0x041b tx timeout [ 44.368453][ T4705] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4705) [ 44.398842][ T4705] FAULT_INJECTION: forcing a failure. [ 44.398842][ T4705] name failslab, interval 1, probability 0, space 0, times 0 [ 44.401345][ T4705] CPU: 0 PID: 4705 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.402760][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.404424][ T4705] Call trace: [ 44.405003][ T4705] dump_backtrace+0x0/0x458 [ 44.405753][ T4705] show_stack+0x2c/0x3c [ 44.406465][ T4705] __dump_stack+0x30/0x40 [ 44.407198][ T4705] dump_stack_lvl+0xf4/0x15c [ 44.407972][ T4705] dump_stack+0x1c/0x5c [ 44.408696][ T4705] should_fail+0x3c8/0x520 [ 44.409493][ T4705] __should_failslab+0xbc/0x10c [ 44.410345][ T4705] should_failslab+0x10/0x28 [ 44.411127][ T4705] slab_pre_alloc_hook+0x64/0xe8 [ 44.411982][ T4705] kmem_cache_alloc+0x94/0x3d8 [ 44.412825][ T4705] btrfs_alloc_path+0x5c/0x68 [ 44.413631][ T4705] __btrfs_run_delayed_refs+0xe6c/0x3484 [ 44.414544][ T4705] btrfs_run_delayed_refs+0x11c/0x460 [ 44.415397][ T4705] btrfs_commit_transaction+0x1d8/0x30ac [ 44.416333][ T4705] btrfs_sync_fs+0x240/0xb2c [ 44.417116][ T4705] sync_filesystem+0x1a0/0x218 [ 44.417944][ T4705] btrfs_remount+0x190/0x12ac [ 44.418730][ T4705] legacy_reconfigure+0xfc/0x114 [ 44.419521][ T4705] reconfigure_super+0x1d0/0x6c4 [ 44.420344][ T4705] path_mount+0xd20/0xfe8 [ 44.421088][ T4705] __arm64_sys_mount+0x488/0x5f8 [ 44.421906][ T4705] invoke_syscall+0x98/0x28c [ 44.422688][ T4705] el0_svc_common+0x13c/0x258 [ 44.423489][ T4705] do_el0_svc+0x5c/0x140 [ 44.424183][ T4705] el0_svc+0x78/0x1d0 [ 44.424866][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 44.425700][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 44.427858][ T4705] BTRFS error (device loop0): failed to run delayed ref for logical 5246976 num_bytes 4096 type 176 action 1 ref_mod 1: -12 [ 44.430205][ T4705] ------------[ cut here ]------------ [ 44.431179][ T4705] WARNING: CPU: 1 PID: 4705 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 44.433021][ T4705] Modules linked in: [ 44.433710][ T4705] CPU: 1 PID: 4705 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.435345][ T4705] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.437136][ T4705] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 44.438692][ T4705] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 44.439809][ T4705] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 44.440828][ T4705] sp : ffff800020227570 [ 44.441590][ T4705] x29: ffff800020227580 x28: ffff0000d55f9000 x27: dfff800000000000 [ 44.442921][ T4705] x26: dfff800000000000 x25: ffff0000dedf3d10 x24: 1fffe0001bdbe7ad [ 44.444267][ T4705] x23: ffff0000dedf3d68 x22: 00000000fffffff4 x21: 0000000000000000 [ 44.445891][ T4705] x20: 00000000fffffff4 x19: ffff0000dedf3d10 x18: 0000000000000000 [ 44.447540][ T4705] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 44.449198][ T4705] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 44.450763][ T4705] x11: ff8080000830061c x10: 0000000000000000 x9 : 6dc3f7e25927d300 [ 44.452233][ T4705] x8 : 6dc3f7e25927d300 x7 : 0000000000000001 x6 : 0000000000000001 [ 44.453552][ T4705] x5 : ffff800020226e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 44.455131][ T4705] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 44.456601][ T4705] Call trace: [ 44.457211][ T4705] btrfs_run_delayed_refs+0x3e8/0x460 [ 44.458190][ T4705] btrfs_commit_transaction+0x1d8/0x30ac [ 44.459121][ T4705] btrfs_sync_fs+0x240/0xb2c [ 44.459883][ T4705] sync_filesystem+0x1a0/0x218 [ 44.460669][ T4705] btrfs_remount+0x190/0x12ac [ 44.461410][ T4705] legacy_reconfigure+0xfc/0x114 [ 44.462234][ T4705] reconfigure_super+0x1d0/0x6c4 [ 44.463130][ T4705] path_mount+0xd20/0xfe8 [ 44.463898][ T4705] __arm64_sys_mount+0x488/0x5f8 [ 44.464726][ T4705] invoke_syscall+0x98/0x28c [ 44.465472][ T4705] el0_svc_common+0x13c/0x258 [ 44.466244][ T4705] do_el0_svc+0x5c/0x140 [ 44.466918][ T4705] el0_svc+0x78/0x1d0 [ 44.467598][ T4705] el0t_64_sync_handler+0xcc/0xe4 [ 44.468464][ T4705] el0t_64_sync+0x1a0/0x1a4 [ 44.469254][ T4705] irq event stamp: 79534 [ 44.470012][ T4705] hardirqs last enabled at (79533): [] __up_console_sem+0xb4/0xfc [ 44.471696][ T4705] hardirqs last disabled at (79534): [] el1_dbg+0x24/0x80 [ 44.473174][ T4705] softirqs last enabled at (79496): [] handle_softirqs+0xa70/0xc14 [ 44.474775][ T4705] softirqs last disabled at (79421): [] __irq_exit_rcu+0x240/0x434 [ 44.476271][ T4705] ---[ end trace 811c90d7563d9f76 ]--- [ 44.477330][ T4705] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 44.479493][ T4705] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 44.669068][ T4726] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4726) [ 44.702343][ T4726] FAULT_INJECTION: forcing a failure. [ 44.702343][ T4726] name failslab, interval 1, probability 0, space 0, times 0 [ 44.704399][ T4726] CPU: 0 PID: 4726 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.705956][ T4726] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.707450][ T4726] Call trace: [ 44.707974][ T4726] dump_backtrace+0x0/0x458 [ 44.708902][ T4726] show_stack+0x2c/0x3c [ 44.709717][ T4726] __dump_stack+0x30/0x40 [ 44.710495][ T4726] dump_stack_lvl+0xf4/0x15c [ 44.711297][ T4726] dump_stack+0x1c/0x5c [ 44.712050][ T4726] should_fail+0x3c8/0x520 [ 44.712788][ T4726] __should_failslab+0xbc/0x10c [ 44.713626][ T4726] should_failslab+0x10/0x28 [ 44.714418][ T4726] slab_pre_alloc_hook+0x64/0xe8 [ 44.715323][ T4726] kmem_cache_alloc+0x94/0x3d8 [ 44.716099][ T4726] start_transaction+0x530/0x1438 [ 44.716968][ T4726] btrfs_attach_transaction_barrier+0x30/0xac [ 44.718027][ T4726] btrfs_sync_fs+0x13c/0xb2c [ 44.718833][ T4726] sync_filesystem+0x1a0/0x218 [ 44.719693][ T4726] btrfs_remount+0x190/0x12ac [ 44.720542][ T4726] legacy_reconfigure+0xfc/0x114 [ 44.721404][ T4726] reconfigure_super+0x1d0/0x6c4 [ 44.722246][ T4726] path_mount+0xd20/0xfe8 [ 44.723000][ T4726] __arm64_sys_mount+0x488/0x5f8 [ 44.723857][ T4726] invoke_syscall+0x98/0x28c [ 44.724693][ T4726] el0_svc_common+0x13c/0x258 [ 44.725510][ T4726] do_el0_svc+0x5c/0x140 [ 44.726278][ T4726] el0_svc+0x78/0x1d0 [ 44.726985][ T4726] el0t_64_sync_handler+0xcc/0xe4 [ 44.727848][ T4726] el0t_64_sync+0x1a0/0x1a4 [ 44.863874][ T4747] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4747) [ 44.878938][ T4747] FAULT_INJECTION: forcing a failure. [ 44.878938][ T4747] name failslab, interval 1, probability 0, space 0, times 0 [ 44.881058][ T4747] CPU: 0 PID: 4747 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.882583][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.884230][ T4747] Call trace: [ 44.884755][ T4747] dump_backtrace+0x0/0x458 [ 44.885510][ T4747] show_stack+0x2c/0x3c [ 44.886170][ T4747] __dump_stack+0x30/0x40 [ 44.886851][ T4747] dump_stack_lvl+0xf4/0x15c [ 44.887556][ T4747] dump_stack+0x1c/0x5c [ 44.888257][ T4747] should_fail+0x3c8/0x520 [ 44.889043][ T4747] __should_failslab+0xbc/0x10c [ 44.889943][ T4747] should_failslab+0x10/0x28 [ 44.890713][ T4747] slab_pre_alloc_hook+0x64/0xe8 [ 44.891704][ T4747] kmem_cache_alloc+0x94/0x3d8 [ 44.892624][ T4747] btrfs_alloc_path+0x5c/0x68 [ 44.893408][ T4747] __btrfs_free_extent+0x1a4/0x1ae0 [ 44.894308][ T4747] __btrfs_run_delayed_refs+0xc00/0x3484 [ 44.895250][ T4747] btrfs_run_delayed_refs+0x11c/0x460 [ 44.896111][ T4747] btrfs_commit_transaction+0x1d8/0x30ac [ 44.897075][ T4747] btrfs_sync_fs+0x240/0xb2c [ 44.897843][ T4747] sync_filesystem+0x1a0/0x218 [ 44.898666][ T4747] btrfs_remount+0x190/0x12ac [ 44.899460][ T4747] legacy_reconfigure+0xfc/0x114 [ 44.900283][ T4747] reconfigure_super+0x1d0/0x6c4 [ 44.901090][ T4747] path_mount+0xd20/0xfe8 [ 44.901810][ T4747] __arm64_sys_mount+0x488/0x5f8 [ 44.902820][ T4747] invoke_syscall+0x98/0x28c [ 44.903738][ T4747] el0_svc_common+0x13c/0x258 [ 44.904573][ T4747] do_el0_svc+0x5c/0x140 [ 44.905319][ T4747] el0_svc+0x78/0x1d0 [ 44.906013][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 44.906888][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 44.909322][ T4747] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 44.911260][ T4747] ------------[ cut here ]------------ [ 44.912311][ T4747] WARNING: CPU: 0 PID: 4747 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 44.914040][ T4747] Modules linked in: [ 44.914687][ T4747] CPU: 0 PID: 4747 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.916141][ T4747] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.917652][ T4747] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 44.919019][ T4747] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 44.919976][ T4747] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 44.920946][ T4747] sp : ffff800020347570 [ 44.921663][ T4747] x29: ffff800020347580 x28: ffff0000d7208000 x27: dfff800000000000 [ 44.923242][ T4747] x26: dfff800000000000 x25: ffff0000dd694210 x24: 1fffe0001bad284d [ 44.924731][ T4747] x23: ffff0000dd694268 x22: 00000000fffffff4 x21: 0000000000000000 [ 44.926311][ T4747] x20: 00000000fffffff4 x19: ffff0000dd694210 x18: 0000000000000000 [ 44.927755][ T4747] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 44.929222][ T4747] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 44.930762][ T4747] x11: ff8080000830061c x10: 0000000000000000 x9 : 96040ec2e2943600 [ 44.932341][ T4747] x8 : 96040ec2e2943600 x7 : 0000000000000001 x6 : 0000000000000001 [ 44.933770][ T4747] x5 : ffff800020346e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 44.935228][ T4747] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 44.936617][ T4747] Call trace: [ 44.937193][ T4747] btrfs_run_delayed_refs+0x3e8/0x460 [ 44.938275][ T4747] btrfs_commit_transaction+0x1d8/0x30ac [ 44.939354][ T4747] btrfs_sync_fs+0x240/0xb2c [ 44.940225][ T4747] sync_filesystem+0x1a0/0x218 [ 44.941215][ T4747] btrfs_remount+0x190/0x12ac [ 44.942076][ T4747] legacy_reconfigure+0xfc/0x114 [ 44.942943][ T4747] reconfigure_super+0x1d0/0x6c4 [ 44.943769][ T4747] path_mount+0xd20/0xfe8 [ 44.944545][ T4747] __arm64_sys_mount+0x488/0x5f8 [ 44.945408][ T4747] invoke_syscall+0x98/0x28c [ 44.946230][ T4747] el0_svc_common+0x13c/0x258 [ 44.947069][ T4747] do_el0_svc+0x5c/0x140 [ 44.947831][ T4747] el0_svc+0x78/0x1d0 [ 44.948487][ T4747] el0t_64_sync_handler+0xcc/0xe4 [ 44.949361][ T4747] el0t_64_sync+0x1a0/0x1a4 [ 44.950139][ T4747] irq event stamp: 79340 [ 44.950882][ T4747] hardirqs last enabled at (79339): [] __up_console_sem+0xb4/0xfc [ 44.952445][ T4747] hardirqs last disabled at (79340): [] el1_dbg+0x24/0x80 [ 44.953861][ T4747] softirqs last enabled at (79308): [] handle_softirqs+0xa70/0xc14 [ 44.955445][ T4747] softirqs last disabled at (79237): [] __irq_exit_rcu+0x240/0x434 [ 44.956967][ T4747] ---[ end trace 811c90d7563d9f77 ]--- [ 44.960535][ T4747] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 44.962400][ T4747] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 45.156685][ T4768] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4768) [ 45.174600][ T4768] FAULT_INJECTION: forcing a failure. [ 45.174600][ T4768] name failslab, interval 1, probability 0, space 0, times 0 [ 45.176804][ T4768] CPU: 0 PID: 4768 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 45.178330][ T4768] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.180124][ T4768] Call trace: [ 45.180711][ T4768] dump_backtrace+0x0/0x458 [ 45.181476][ T4768] show_stack+0x2c/0x3c [ 45.182150][ T4768] __dump_stack+0x30/0x40 [ 45.182877][ T4768] dump_stack_lvl+0xf4/0x15c [ 45.183627][ T4768] dump_stack+0x1c/0x5c [ 45.184355][ T4768] should_fail+0x3c8/0x520 [ 45.185066][ T4768] __should_failslab+0xbc/0x10c [ 45.185891][ T4768] should_failslab+0x10/0x28 [ 45.186615][ T4768] slab_pre_alloc_hook+0x64/0xe8 [ 45.187441][ T4768] kmem_cache_alloc+0x94/0x3d8 [ 45.188265][ T4768] alloc_extent_state+0x38/0x434 [ 45.189074][ T4768] set_extent_bit+0x1ac/0x13a8 [ 45.189929][ T4768] btrfs_alloc_tree_block+0x930/0x10f0 [ 45.190843][ T4768] btrfs_force_cow_block+0x3ac/0x172c [ 45.191732][ T4768] btrfs_cow_block+0x2d4/0x674 [ 45.192597][ T4768] btrfs_search_slot+0xa10/0x1ec8 [ 45.193443][ T4768] btrfs_insert_empty_items+0x1e8/0x2b0 [ 45.194309][ T4768] __btrfs_run_delayed_refs+0xb84/0x3484 [ 45.195227][ T4768] btrfs_run_delayed_refs+0x11c/0x460 [ 45.196080][ T4768] btrfs_commit_transaction+0x1d8/0x30ac [ 45.197069][ T4768] btrfs_sync_fs+0x240/0xb2c [ 45.197856][ T4768] sync_filesystem+0x1a0/0x218 [ 45.198674][ T4768] btrfs_remount+0x190/0x12ac [ 45.199513][ T4768] legacy_reconfigure+0xfc/0x114 [ 45.200338][ T4768] reconfigure_super+0x1d0/0x6c4 [ 45.201112][ T4768] path_mount+0xd20/0xfe8 [ 45.201838][ T4768] __arm64_sys_mount+0x488/0x5f8 [ 45.202656][ T4768] invoke_syscall+0x98/0x28c [ 45.203429][ T4768] el0_svc_common+0x13c/0x258 [ 45.204241][ T4768] do_el0_svc+0x5c/0x140 [ 45.204938][ T4768] el0_svc+0x78/0x1d0 [ 45.205600][ T4768] el0t_64_sync_handler+0xcc/0xe4 [ 45.206415][ T4768] el0t_64_sync+0x1a0/0x1a4 1970/01/01 00:00:45 executed programs: 14 [ 45.380796][ T4789] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4789) [ 45.408241][ T4789] FAULT_INJECTION: forcing a failure. [ 45.408241][ T4789] name failslab, interval 1, probability 0, space 0, times 0 [ 45.410698][ T4789] CPU: 0 PID: 4789 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 45.412147][ T4789] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.413927][ T4789] Call trace: [ 45.414504][ T4789] dump_backtrace+0x0/0x458 [ 45.415260][ T4789] show_stack+0x2c/0x3c [ 45.415980][ T4789] __dump_stack+0x30/0x40 [ 45.416685][ T4789] dump_stack_lvl+0xf4/0x15c [ 45.417473][ T4789] dump_stack+0x1c/0x5c [ 45.418137][ T4789] should_fail+0x3c8/0x520 [ 45.418863][ T4789] __should_failslab+0xbc/0x10c [ 45.419794][ T4789] should_failslab+0x10/0x28 [ 45.420713][ T4789] slab_pre_alloc_hook+0x64/0xe8 [ 45.421591][ T4789] kmem_cache_alloc+0x94/0x3d8 [ 45.422431][ T4789] btrfs_alloc_path+0x5c/0x68 [ 45.423325][ T4789] __btrfs_run_delayed_refs+0xe6c/0x3484 [ 45.424350][ T4789] btrfs_run_delayed_refs+0x11c/0x460 [ 45.425293][ T4789] btrfs_commit_transaction+0x1d8/0x30ac [ 45.426288][ T4789] btrfs_sync_fs+0x240/0xb2c [ 45.427035][ T4789] sync_filesystem+0x1a0/0x218 [ 45.427793][ T4789] btrfs_remount+0x190/0x12ac [ 45.428515][ T4789] legacy_reconfigure+0xfc/0x114 [ 45.429338][ T4789] reconfigure_super+0x1d0/0x6c4 [ 45.430165][ T4789] path_mount+0xd20/0xfe8 [ 45.430815][ T4789] __arm64_sys_mount+0x488/0x5f8 [ 45.431653][ T4789] invoke_syscall+0x98/0x28c [ 45.432407][ T4789] el0_svc_common+0x13c/0x258 [ 45.433228][ T4789] do_el0_svc+0x5c/0x140 [ 45.433943][ T4789] el0_svc+0x78/0x1d0 [ 45.434641][ T4789] el0t_64_sync_handler+0xcc/0xe4 [ 45.435478][ T4789] el0t_64_sync+0x1a0/0x1a4 [ 45.438564][ T4789] BTRFS error (device loop0): failed to run delayed ref for logical 5246976 num_bytes 4096 type 176 action 1 ref_mod 1: -12 [ 45.440704][ T4789] ------------[ cut here ]------------ [ 45.441658][ T4789] WARNING: CPU: 0 PID: 4789 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 45.443275][ T4789] Modules linked in: [ 45.443910][ T4789] CPU: 0 PID: 4789 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 45.445401][ T4789] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.447044][ T4789] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 45.448293][ T4789] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 45.449261][ T4789] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 45.450258][ T4789] sp : ffff800020a97570 [ 45.450955][ T4789] x29: ffff800020a97580 x28: ffff0000ddbea000 x27: dfff800000000000 [ 45.452307][ T4789] x26: dfff800000000000 x25: ffff0000dd694630 x24: 1fffe0001bad28d1 [ 45.453592][ T4789] x23: ffff0000dd694688 x22: 00000000fffffff4 x21: 0000000000000000 [ 45.454982][ T4789] x20: 00000000fffffff4 x19: ffff0000dd694630 x18: 0000000000000000 [ 45.456288][ T4789] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 45.457507][ T4789] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 45.458811][ T4789] x11: ff8080000830061c x10: 0000000000000000 x9 : dc3609f715198f00 [ 45.460056][ T4789] x8 : dc3609f715198f00 x7 : 0000000000000001 x6 : 0000000000000001 [ 45.461384][ T4789] x5 : ffff800020a96e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 45.462717][ T4789] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 45.464055][ T4789] Call trace: [ 45.464619][ T4789] btrfs_run_delayed_refs+0x3e8/0x460 [ 45.465541][ T4789] btrfs_commit_transaction+0x1d8/0x30ac [ 45.466508][ T4789] btrfs_sync_fs+0x240/0xb2c [ 45.467294][ T4789] sync_filesystem+0x1a0/0x218 [ 45.468113][ T4789] btrfs_remount+0x190/0x12ac [ 45.468943][ T4789] legacy_reconfigure+0xfc/0x114 [ 45.469800][ T4789] reconfigure_super+0x1d0/0x6c4 [ 45.470616][ T4789] path_mount+0xd20/0xfe8 [ 45.471325][ T4789] __arm64_sys_mount+0x488/0x5f8 [ 45.472124][ T4789] invoke_syscall+0x98/0x28c [ 45.472902][ T4789] el0_svc_common+0x13c/0x258 [ 45.473670][ T4789] do_el0_svc+0x5c/0x140 [ 45.474370][ T4789] el0_svc+0x78/0x1d0 [ 45.475047][ T4789] el0t_64_sync_handler+0xcc/0xe4 [ 45.475928][ T4789] el0t_64_sync+0x1a0/0x1a4 [ 45.476706][ T4789] irq event stamp: 79400 [ 45.477442][ T4789] hardirqs last enabled at (79399): [] __up_console_sem+0xb4/0xfc [ 45.479107][ T4789] hardirqs last disabled at (79400): [] el1_dbg+0x24/0x80 [ 45.480642][ T4789] softirqs last enabled at (79352): [] handle_softirqs+0xa70/0xc14 [ 45.482244][ T4789] softirqs last disabled at (79301): [] __irq_exit_rcu+0x240/0x434 [ 45.483931][ T4789] ---[ end trace 811c90d7563d9f78 ]--- [ 45.487000][ T4789] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 45.488684][ T4789] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 45.680495][ T4810] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4810) [ 45.702252][ T4810] FAULT_INJECTION: forcing a failure. [ 45.702252][ T4810] name failslab, interval 1, probability 0, space 0, times 0 [ 45.704518][ T4810] CPU: 0 PID: 4810 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 45.705954][ T4810] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.707620][ T4810] Call trace: [ 45.708148][ T4810] dump_backtrace+0x0/0x458 [ 45.708897][ T4810] show_stack+0x2c/0x3c [ 45.709574][ T4810] __dump_stack+0x30/0x40 [ 45.710291][ T4810] dump_stack_lvl+0xf4/0x15c [ 45.711047][ T4810] dump_stack+0x1c/0x5c [ 45.711752][ T4810] should_fail+0x3c8/0x520 [ 45.712523][ T4810] __should_failslab+0xbc/0x10c [ 45.713383][ T4810] should_failslab+0x10/0x28 [ 45.714178][ T4810] slab_pre_alloc_hook+0x64/0xe8 [ 45.714956][ T4810] kmem_cache_alloc+0x94/0x3d8 [ 45.715745][ T4810] alloc_extent_state+0x38/0x434 [ 45.716550][ T4810] set_extent_bit+0x1ac/0x13a8 [ 45.717315][ T4810] btrfs_alloc_tree_block+0x930/0x10f0 [ 45.718225][ T4810] btrfs_force_cow_block+0x3ac/0x172c [ 45.719106][ T4810] btrfs_cow_block+0x2d4/0x674 [ 45.719924][ T4810] btrfs_search_slot+0xa10/0x1ec8 [ 45.720708][ T4810] btrfs_insert_empty_items+0x1e8/0x2b0 [ 45.721619][ T4810] __btrfs_run_delayed_refs+0xb84/0x3484 [ 45.722619][ T4810] btrfs_run_delayed_refs+0x11c/0x460 [ 45.723540][ T4810] btrfs_commit_transaction+0x1d8/0x30ac [ 45.724489][ T4810] btrfs_sync_fs+0x240/0xb2c [ 45.725276][ T4810] sync_filesystem+0x1a0/0x218 [ 45.726113][ T4810] btrfs_remount+0x190/0x12ac [ 45.726927][ T4810] legacy_reconfigure+0xfc/0x114 [ 45.727755][ T4810] reconfigure_super+0x1d0/0x6c4 [ 45.728597][ T4810] path_mount+0xd20/0xfe8 [ 45.729397][ T4810] __arm64_sys_mount+0x488/0x5f8 [ 45.730273][ T4810] invoke_syscall+0x98/0x28c [ 45.731094][ T4810] el0_svc_common+0x13c/0x258 [ 45.731919][ T4810] do_el0_svc+0x5c/0x140 [ 45.732677][ T4810] el0_svc+0x78/0x1d0 [ 45.733370][ T4810] el0t_64_sync_handler+0xcc/0xe4 [ 45.734241][ T4810] el0t_64_sync+0x1a0/0x1a4 [ 45.906608][ T4831] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4831) [ 45.928899][ T4831] FAULT_INJECTION: forcing a failure. [ 45.928899][ T4831] name failslab, interval 1, probability 0, space 0, times 0 [ 45.931266][ T4831] CPU: 1 PID: 4831 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 45.932633][ T4831] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.934311][ T4831] Call trace: [ 45.934849][ T4831] dump_backtrace+0x0/0x458 [ 45.935633][ T4831] show_stack+0x2c/0x3c [ 45.936317][ T4831] __dump_stack+0x30/0x40 [ 45.937062][ T4831] dump_stack_lvl+0xf4/0x15c [ 45.937827][ T4831] dump_stack+0x1c/0x5c [ 45.938532][ T4831] should_fail+0x3c8/0x520 [ 45.939252][ T4831] __should_failslab+0xbc/0x10c [ 45.940027][ T4831] should_failslab+0x10/0x28 [ 45.940792][ T4831] slab_pre_alloc_hook+0x64/0xe8 [ 45.941621][ T4831] kmem_cache_alloc+0x94/0x3d8 [ 45.942416][ T4831] btrfs_alloc_path+0x5c/0x68 [ 45.943228][ T4831] __btrfs_run_delayed_refs+0xe6c/0x3484 [ 45.944215][ T4831] btrfs_run_delayed_refs+0x11c/0x460 [ 45.945103][ T4831] btrfs_commit_transaction+0x1d8/0x30ac [ 45.946038][ T4831] btrfs_sync_fs+0x240/0xb2c [ 45.946823][ T4831] sync_filesystem+0x1a0/0x218 [ 45.947649][ T4831] btrfs_remount+0x190/0x12ac [ 45.948468][ T4831] legacy_reconfigure+0xfc/0x114 [ 45.949306][ T4831] reconfigure_super+0x1d0/0x6c4 [ 45.950264][ T4831] path_mount+0xd20/0xfe8 [ 45.951062][ T4831] __arm64_sys_mount+0x488/0x5f8 [ 45.951938][ T4831] invoke_syscall+0x98/0x28c [ 45.952734][ T4831] el0_svc_common+0x13c/0x258 [ 45.953505][ T4831] do_el0_svc+0x5c/0x140 [ 45.954215][ T4831] el0_svc+0x78/0x1d0 [ 45.954902][ T4831] el0t_64_sync_handler+0xcc/0xe4 [ 45.955785][ T4831] el0t_64_sync+0x1a0/0x1a4 [ 45.957482][ T4831] BTRFS error (device loop0): failed to run delayed ref for logical 5246976 num_bytes 4096 type 176 action 1 ref_mod 1: -12 [ 45.960355][ T4831] ------------[ cut here ]------------ [ 45.961363][ T4831] WARNING: CPU: 1 PID: 4831 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 45.963247][ T4831] Modules linked in: [ 45.963975][ T4831] CPU: 1 PID: 4831 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 45.965758][ T4831] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.967672][ T4831] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 45.969052][ T4831] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 45.970061][ T4831] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 45.971147][ T4831] sp : ffff800020a97570 [ 45.971926][ T4831] x29: ffff800020a97580 x28: ffff0000dab05000 x27: dfff800000000000 [ 45.973384][ T4831] x26: dfff800000000000 x25: ffff0000ded0c0b0 x24: 1fffe0001bda1821 [ 45.974995][ T4831] x23: ffff0000ded0c108 x22: 00000000fffffff4 x21: 0000000000000000 [ 45.976626][ T4831] x20: 00000000fffffff4 x19: ffff0000ded0c0b0 x18: 0000000000000000 [ 45.978265][ T4831] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 45.979881][ T4831] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 45.981506][ T4831] x11: ff8080000830061c x10: 0000000000000000 x9 : e9db9cb2002a9c00 [ 45.982948][ T4831] x8 : e9db9cb2002a9c00 x7 : 0000000000000001 x6 : 0000000000000001 [ 45.984349][ T4831] x5 : ffff800020a96e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 45.985950][ T4831] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 45.987543][ T4831] Call trace: [ 45.988200][ T4831] btrfs_run_delayed_refs+0x3e8/0x460 [ 45.989255][ T4831] btrfs_commit_transaction+0x1d8/0x30ac [ 45.990338][ T4831] btrfs_sync_fs+0x240/0xb2c [ 45.991216][ T4831] sync_filesystem+0x1a0/0x218 [ 45.992145][ T4831] btrfs_remount+0x190/0x12ac [ 45.993069][ T4831] legacy_reconfigure+0xfc/0x114 [ 45.993999][ T4831] reconfigure_super+0x1d0/0x6c4 [ 45.994944][ T4831] path_mount+0xd20/0xfe8 [ 45.995755][ T4831] __arm64_sys_mount+0x488/0x5f8 [ 45.996675][ T4831] invoke_syscall+0x98/0x28c [ 45.997560][ T4831] el0_svc_common+0x13c/0x258 [ 45.998396][ T4831] do_el0_svc+0x5c/0x140 [ 45.999142][ T4831] el0_svc+0x78/0x1d0 [ 45.999881][ T4831] el0t_64_sync_handler+0xcc/0xe4 [ 46.000730][ T4831] el0t_64_sync+0x1a0/0x1a4 [ 46.001495][ T4831] irq event stamp: 79192 [ 46.002207][ T4831] hardirqs last enabled at (79191): [] __up_console_sem+0xb4/0xfc [ 46.003780][ T4831] hardirqs last disabled at (79192): [] el1_dbg+0x24/0x80 [ 46.005199][ T4831] softirqs last enabled at (79152): [] handle_softirqs+0xa70/0xc14 [ 46.006782][ T4831] softirqs last disabled at (79093): [] __irq_exit_rcu+0x240/0x434 [ 46.008409][ T4831] ---[ end trace 811c90d7563d9f79 ]--- [ 46.010378][ T4831] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 46.012196][ T4831] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 46.195117][ T4852] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4852) [ 46.211457][ T4852] FAULT_INJECTION: forcing a failure. [ 46.211457][ T4852] name failslab, interval 1, probability 0, space 0, times 0 [ 46.213705][ T4852] CPU: 0 PID: 4852 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 46.215296][ T4852] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.216937][ T4852] Call trace: [ 46.217453][ T4852] dump_backtrace+0x0/0x458 [ 46.218243][ T4852] show_stack+0x2c/0x3c [ 46.218942][ T4852] __dump_stack+0x30/0x40 [ 46.219724][ T4852] dump_stack_lvl+0xf4/0x15c [ 46.220460][ T4852] dump_stack+0x1c/0x5c [ 46.221292][ T4852] should_fail+0x3c8/0x520 [ 46.222156][ T4852] __should_failslab+0xbc/0x10c [ 46.223084][ T4852] should_failslab+0x10/0x28 [ 46.223968][ T4852] slab_pre_alloc_hook+0x64/0xe8 [ 46.224953][ T4852] kmem_cache_alloc+0x94/0x3d8 [ 46.225931][ T4852] btrfs_alloc_path+0x5c/0x68 [ 46.226837][ T4852] __btrfs_free_extent+0x1a4/0x1ae0 [ 46.227729][ T4852] __btrfs_run_delayed_refs+0xc00/0x3484 [ 46.228784][ T4852] btrfs_run_delayed_refs+0x11c/0x460 [ 46.229697][ T4852] btrfs_commit_transaction+0x1d8/0x30ac [ 46.230658][ T4852] btrfs_sync_fs+0x240/0xb2c [ 46.231469][ T4852] sync_filesystem+0x1a0/0x218 [ 46.232269][ T4852] btrfs_remount+0x190/0x12ac [ 46.233247][ T4852] legacy_reconfigure+0xfc/0x114 [ 46.234200][ T4852] reconfigure_super+0x1d0/0x6c4 [ 46.235151][ T4852] path_mount+0xd20/0xfe8 [ 46.235919][ T4852] __arm64_sys_mount+0x488/0x5f8 [ 46.236775][ T4852] invoke_syscall+0x98/0x28c [ 46.237605][ T4852] el0_svc_common+0x13c/0x258 [ 46.238367][ T4852] do_el0_svc+0x5c/0x140 [ 46.239089][ T4852] el0_svc+0x78/0x1d0 [ 46.239786][ T4852] el0t_64_sync_handler+0xcc/0xe4 [ 46.240673][ T4852] el0t_64_sync+0x1a0/0x1a4 [ 46.242181][ T4852] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 46.244525][ T4852] ------------[ cut here ]------------ [ 46.245867][ T4852] WARNING: CPU: 0 PID: 4852 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 46.247457][ T4852] Modules linked in: [ 46.248104][ T4852] CPU: 0 PID: 4852 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 46.249613][ T4852] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.251272][ T4852] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 46.252621][ T4852] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 46.253599][ T4852] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 46.254480][ T4852] sp : ffff800020d07570 [ 46.255178][ T4852] x29: ffff800020d07580 x28: ffff0000ddbec000 x27: dfff800000000000 [ 46.256546][ T4852] x26: dfff800000000000 x25: ffff0000dd694bb0 x24: 1fffe0001bad2981 [ 46.257962][ T4852] x23: ffff0000dd694c08 x22: 00000000fffffff4 x21: 0000000000000000 [ 46.259400][ T4852] x20: 00000000fffffff4 x19: ffff0000dd694bb0 x18: 0000000000000000 [ 46.260784][ T4852] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 46.262235][ T4852] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 46.263685][ T4852] x11: ff8080000830061c x10: 0000000000000000 x9 : b0de354805558700 [ 46.265054][ T4852] x8 : b0de354805558700 x7 : 0000000000000001 x6 : 0000000000000001 [ 46.266375][ T4852] x5 : ffff800020d06e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 46.267640][ T4852] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 46.268943][ T4852] Call trace: [ 46.269472][ T4852] btrfs_run_delayed_refs+0x3e8/0x460 [ 46.270373][ T4852] btrfs_commit_transaction+0x1d8/0x30ac [ 46.271336][ T4852] btrfs_sync_fs+0x240/0xb2c [ 46.272144][ T4852] sync_filesystem+0x1a0/0x218 [ 46.272969][ T4852] btrfs_remount+0x190/0x12ac [ 46.273762][ T4852] legacy_reconfigure+0xfc/0x114 [ 46.274601][ T4852] reconfigure_super+0x1d0/0x6c4 [ 46.275613][ T4852] path_mount+0xd20/0xfe8 [ 46.276406][ T4852] __arm64_sys_mount+0x488/0x5f8 [ 46.277420][ T4852] invoke_syscall+0x98/0x28c [ 46.278243][ T4852] el0_svc_common+0x13c/0x258 [ 46.279076][ T4852] do_el0_svc+0x5c/0x140 [ 46.279776][ T4852] el0_svc+0x78/0x1d0 [ 46.280467][ T4852] el0t_64_sync_handler+0xcc/0xe4 [ 46.281291][ T4852] el0t_64_sync+0x1a0/0x1a4 [ 46.282013][ T4852] irq event stamp: 78986 [ 46.282712][ T4852] hardirqs last enabled at (78985): [] __up_console_sem+0xb4/0xfc [ 46.284292][ T4852] hardirqs last disabled at (78986): [] el1_dbg+0x24/0x80 [ 46.285661][ T4852] softirqs last enabled at (78946): [] handle_softirqs+0xa70/0xc14 [ 46.287237][ T4852] softirqs last disabled at (78919): [] __irq_exit_rcu+0x240/0x434 [ 46.288842][ T4852] ---[ end trace 811c90d7563d9f7a ]--- [ 46.290739][ T4852] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 46.292273][ T4852] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 46.328344][ T4571] Bluetooth: hci0: command 0x040f tx timeout [ 46.457779][ T4873] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4873) [ 46.472485][ T4873] FAULT_INJECTION: forcing a failure. [ 46.472485][ T4873] name failslab, interval 1, probability 0, space 0, times 0 [ 46.474649][ T4873] CPU: 0 PID: 4873 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 46.476083][ T4873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.478037][ T4873] Call trace: [ 46.478666][ T4873] dump_backtrace+0x0/0x458 [ 46.479524][ T4873] show_stack+0x2c/0x3c [ 46.480369][ T4873] __dump_stack+0x30/0x40 [ 46.481163][ T4873] dump_stack_lvl+0xf4/0x15c [ 46.481999][ T4873] dump_stack+0x1c/0x5c [ 46.482773][ T4873] should_fail+0x3c8/0x520 [ 46.483610][ T4873] __should_failslab+0xbc/0x10c [ 46.484486][ T4873] should_failslab+0x10/0x28 [ 46.485435][ T4873] slab_pre_alloc_hook+0x64/0xe8 [ 46.486460][ T4873] kmem_cache_alloc+0x94/0x3d8 [ 46.487347][ T4873] btrfs_alloc_path+0x5c/0x68 [ 46.488152][ T4873] __btrfs_free_extent+0x1a4/0x1ae0 [ 46.489050][ T4873] __btrfs_run_delayed_refs+0xc00/0x3484 [ 46.490066][ T4873] btrfs_run_delayed_refs+0x11c/0x460 [ 46.491118][ T4873] btrfs_commit_transaction+0x1d8/0x30ac [ 46.492187][ T4873] btrfs_sync_fs+0x240/0xb2c [ 46.493064][ T4873] sync_filesystem+0x1a0/0x218 [ 46.493858][ T4873] btrfs_remount+0x190/0x12ac [ 46.494635][ T4873] legacy_reconfigure+0xfc/0x114 [ 46.495417][ T4873] reconfigure_super+0x1d0/0x6c4 [ 46.496184][ T4873] path_mount+0xd20/0xfe8 [ 46.496867][ T4873] __arm64_sys_mount+0x488/0x5f8 [ 46.497660][ T4873] invoke_syscall+0x98/0x28c [ 46.498437][ T4873] el0_svc_common+0x13c/0x258 [ 46.499228][ T4873] do_el0_svc+0x5c/0x140 [ 46.499921][ T4873] el0_svc+0x78/0x1d0 [ 46.500582][ T4873] el0t_64_sync_handler+0xcc/0xe4 [ 46.501423][ T4873] el0t_64_sync+0x1a0/0x1a4 [ 46.502731][ T4873] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 46.504812][ T4873] ------------[ cut here ]------------ [ 46.505853][ T4873] WARNING: CPU: 0 PID: 4873 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 46.507453][ T4873] Modules linked in: [ 46.508117][ T4873] CPU: 0 PID: 4873 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 46.509643][ T4873] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.511238][ T4873] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 46.512643][ T4873] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 46.513665][ T4873] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 46.514689][ T4873] sp : ffff800020d07570 [ 46.515513][ T4873] x29: ffff800020d07580 x28: ffff0000dab4a000 x27: dfff800000000000 [ 46.516958][ T4873] x26: dfff800000000000 x25: ffff0000dd694dc0 x24: 1fffe0001bad29c3 [ 46.518321][ T4873] x23: ffff0000dd694e18 x22: 00000000fffffff4 x21: 0000000000000000 [ 46.519688][ T4873] x20: 00000000fffffff4 x19: ffff0000dd694dc0 x18: 0000000000000000 [ 46.521105][ T4873] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 46.522559][ T4873] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 46.523998][ T4873] x11: ff8080000830061c x10: 0000000000000000 x9 : f5a6693f88644900 [ 46.525338][ T4873] x8 : f5a6693f88644900 x7 : 0000000000000001 x6 : 0000000000000001 [ 46.526661][ T4873] x5 : ffff800020d06e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 46.528011][ T4873] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 46.529407][ T4873] Call trace: [ 46.529984][ T4873] btrfs_run_delayed_refs+0x3e8/0x460 [ 46.530883][ T4873] btrfs_commit_transaction+0x1d8/0x30ac [ 46.531863][ T4873] btrfs_sync_fs+0x240/0xb2c [ 46.532643][ T4873] sync_filesystem+0x1a0/0x218 [ 46.533628][ T4873] btrfs_remount+0x190/0x12ac [ 46.534545][ T4873] legacy_reconfigure+0xfc/0x114 [ 46.535467][ T4873] reconfigure_super+0x1d0/0x6c4 [ 46.536376][ T4873] path_mount+0xd20/0xfe8 [ 46.537158][ T4873] __arm64_sys_mount+0x488/0x5f8 [ 46.538070][ T4873] invoke_syscall+0x98/0x28c [ 46.538971][ T4873] el0_svc_common+0x13c/0x258 [ 46.539848][ T4873] do_el0_svc+0x5c/0x140 [ 46.540578][ T4873] el0_svc+0x78/0x1d0 [ 46.541386][ T4873] el0t_64_sync_handler+0xcc/0xe4 [ 46.542304][ T4873] el0t_64_sync+0x1a0/0x1a4 [ 46.543133][ T4873] irq event stamp: 79284 [ 46.543850][ T4873] hardirqs last enabled at (79283): [] __up_console_sem+0xb4/0xfc [ 46.545448][ T4873] hardirqs last disabled at (79284): [] el1_dbg+0x24/0x80 [ 46.547200][ T4873] softirqs last enabled at (79252): [] handle_softirqs+0xa70/0xc14 [ 46.548863][ T4873] softirqs last disabled at (79093): [] __irq_exit_rcu+0x240/0x434 [ 46.550450][ T4873] ---[ end trace 811c90d7563d9f7b ]--- [ 46.552027][ T4873] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 46.553548][ T4873] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 46.735829][ T4894] set_capacity_and_notify: 9 callbacks suppressed [ 46.735837][ T4894] loop0: detected capacity change from 0 to 32768 [ 46.739818][ T4894] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4894) [ 46.743458][ T4894] btrfs_printk: 138 callbacks suppressed [ 46.743472][ T4894] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 46.746171][ T4894] BTRFS info (device loop0): enabling auto defrag [ 46.747446][ T4894] BTRFS info (device loop0): enabling disk space caching [ 46.749155][ T4894] BTRFS info (device loop0): disabling tree log [ 46.750284][ T4894] BTRFS info (device loop0): force clearing of disk cache [ 46.751516][ T4894] BTRFS info (device loop0): force zlib compression, level 3 [ 46.753054][ T4894] BTRFS info (device loop0): disabling disk space caching [ 46.754439][ T4894] BTRFS info (device loop0): has skinny extents [ 46.774914][ T4894] BTRFS info (device loop0): enabling ssd optimizations [ 46.776606][ T4894] BTRFS info (device loop0): clearing free space tree [ 46.778312][ T4894] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 46.779903][ T4894] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 46.785048][ T4894] FAULT_INJECTION: forcing a failure. [ 46.785048][ T4894] name failslab, interval 1, probability 0, space 0, times 0 [ 46.787127][ T4894] CPU: 1 PID: 4894 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 46.788752][ T4894] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.790568][ T4894] Call trace: [ 46.791118][ T4894] dump_backtrace+0x0/0x458 [ 46.791894][ T4894] show_stack+0x2c/0x3c [ 46.792574][ T4894] __dump_stack+0x30/0x40 [ 46.793336][ T4894] dump_stack_lvl+0xf4/0x15c [ 46.794149][ T4894] dump_stack+0x1c/0x5c [ 46.794832][ T4894] should_fail+0x3c8/0x520 [ 46.795551][ T4894] __should_failslab+0xbc/0x10c [ 46.796387][ T4894] should_failslab+0x10/0x28 [ 46.797110][ T4894] slab_pre_alloc_hook+0x64/0xe8 [ 46.797920][ T4894] kmem_cache_alloc+0x94/0x3d8 [ 46.798713][ T4894] start_transaction+0x530/0x1438 [ 46.799595][ T4894] btrfs_attach_transaction_barrier+0x30/0xac [ 46.800621][ T4894] btrfs_sync_fs+0x13c/0xb2c [ 46.801385][ T4894] sync_filesystem+0x1a0/0x218 [ 46.802203][ T4894] btrfs_remount+0x190/0x12ac [ 46.803022][ T4894] legacy_reconfigure+0xfc/0x114 [ 46.803847][ T4894] reconfigure_super+0x1d0/0x6c4 [ 46.804705][ T4894] path_mount+0xd20/0xfe8 [ 46.805396][ T4894] __arm64_sys_mount+0x488/0x5f8 [ 46.806212][ T4894] invoke_syscall+0x98/0x28c [ 46.806955][ T4894] el0_svc_common+0x13c/0x258 [ 46.807693][ T4894] do_el0_svc+0x5c/0x140 [ 46.808354][ T4894] el0_svc+0x78/0x1d0 [ 46.808981][ T4894] el0t_64_sync_handler+0xcc/0xe4 [ 46.809775][ T4894] el0t_64_sync+0x1a0/0x1a4 [ 46.974828][ T4915] loop0: detected capacity change from 0 to 32768 [ 46.977338][ T4915] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4915) [ 46.987291][ T4915] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 46.989186][ T4915] BTRFS info (device loop0): enabling auto defrag [ 46.990600][ T4915] BTRFS info (device loop0): enabling disk space caching [ 46.992011][ T4915] BTRFS info (device loop0): disabling tree log [ 46.992996][ T4915] BTRFS info (device loop0): force clearing of disk cache [ 46.994245][ T4915] BTRFS info (device loop0): force zlib compression, level 3 [ 46.995500][ T4915] BTRFS info (device loop0): disabling disk space caching [ 46.996690][ T4915] BTRFS info (device loop0): has skinny extents [ 47.012831][ T4915] BTRFS info (device loop0): enabling ssd optimizations [ 47.014708][ T4915] BTRFS info (device loop0): clearing free space tree [ 47.016043][ T4915] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 47.017584][ T4915] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 47.023520][ T4915] FAULT_INJECTION: forcing a failure. [ 47.023520][ T4915] name failslab, interval 1, probability 0, space 0, times 0 [ 47.025545][ T4915] CPU: 0 PID: 4915 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.027080][ T4915] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.028991][ T4915] Call trace: [ 47.029561][ T4915] dump_backtrace+0x0/0x458 [ 47.030305][ T4915] show_stack+0x2c/0x3c [ 47.031017][ T4915] __dump_stack+0x30/0x40 [ 47.031729][ T4915] dump_stack_lvl+0xf4/0x15c [ 47.032489][ T4915] dump_stack+0x1c/0x5c [ 47.033147][ T4915] should_fail+0x3c8/0x520 [ 47.033872][ T4915] __should_failslab+0xbc/0x10c [ 47.034681][ T4915] should_failslab+0x10/0x28 [ 47.035466][ T4915] slab_pre_alloc_hook+0x64/0xe8 [ 47.036275][ T4915] kmem_cache_alloc+0x94/0x3d8 [ 47.037071][ T4915] btrfs_alloc_path+0x5c/0x68 [ 47.037847][ T4915] __btrfs_free_extent+0x1a4/0x1ae0 [ 47.038739][ T4915] __btrfs_run_delayed_refs+0xc00/0x3484 [ 47.039693][ T4915] btrfs_run_delayed_refs+0x11c/0x460 [ 47.040582][ T4915] btrfs_commit_transaction+0x1d8/0x30ac [ 47.041535][ T4915] btrfs_sync_fs+0x240/0xb2c [ 47.042261][ T4915] sync_filesystem+0x1a0/0x218 [ 47.043016][ T4915] btrfs_remount+0x190/0x12ac [ 47.043771][ T4915] legacy_reconfigure+0xfc/0x114 [ 47.044621][ T4915] reconfigure_super+0x1d0/0x6c4 [ 47.045413][ T4915] path_mount+0xd20/0xfe8 [ 47.046110][ T4915] __arm64_sys_mount+0x488/0x5f8 [ 47.046948][ T4915] invoke_syscall+0x98/0x28c [ 47.047732][ T4915] el0_svc_common+0x13c/0x258 [ 47.048523][ T4915] do_el0_svc+0x5c/0x140 [ 47.049236][ T4915] el0_svc+0x78/0x1d0 [ 47.049875][ T4915] el0t_64_sync_handler+0xcc/0xe4 [ 47.050723][ T4915] el0t_64_sync+0x1a0/0x1a4 [ 47.052587][ T4915] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 47.054841][ T4915] ------------[ cut here ]------------ [ 47.055812][ T4915] WARNING: CPU: 0 PID: 4915 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 47.057586][ T4915] Modules linked in: [ 47.058259][ T4915] CPU: 0 PID: 4915 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.059898][ T4915] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.061568][ T4915] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 47.062913][ T4915] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 47.063912][ T4915] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 47.064920][ T4915] sp : ffff800020ba7570 [ 47.065625][ T4915] x29: ffff800020ba7580 x28: ffff0000dab4d000 x27: dfff800000000000 [ 47.066988][ T4915] x26: dfff800000000000 x25: ffff0000dedf3160 x24: 1fffe0001bdbe637 [ 47.068317][ T4915] x23: ffff0000dedf31b8 x22: 00000000fffffff4 x21: 0000000000000000 [ 47.069568][ T4915] x20: 00000000fffffff4 x19: ffff0000dedf3160 x18: 0000000000000000 [ 47.070902][ T4915] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 47.072257][ T4915] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 47.073860][ T4915] x11: ff8080000830061c x10: 0000000000000000 x9 : 07f48bfc867b4b00 [ 47.075384][ T4915] x8 : 07f48bfc867b4b00 x7 : 0000000000000001 x6 : 0000000000000001 [ 47.076752][ T4915] x5 : ffff800020ba6e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 47.078087][ T4915] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 47.079461][ T4915] Call trace: [ 47.080030][ T4915] btrfs_run_delayed_refs+0x3e8/0x460 [ 47.081137][ T4915] btrfs_commit_transaction+0x1d8/0x30ac [ 47.082231][ T4915] btrfs_sync_fs+0x240/0xb2c [ 47.083138][ T4915] sync_filesystem+0x1a0/0x218 [ 47.083958][ T4915] btrfs_remount+0x190/0x12ac [ 47.084754][ T4915] legacy_reconfigure+0xfc/0x114 [ 47.085585][ T4915] reconfigure_super+0x1d0/0x6c4 [ 47.086430][ T4915] path_mount+0xd20/0xfe8 [ 47.087150][ T4915] __arm64_sys_mount+0x488/0x5f8 [ 47.087985][ T4915] invoke_syscall+0x98/0x28c [ 47.088813][ T4915] el0_svc_common+0x13c/0x258 [ 47.089631][ T4915] do_el0_svc+0x5c/0x140 [ 47.090367][ T4915] el0_svc+0x78/0x1d0 [ 47.091060][ T4915] el0t_64_sync_handler+0xcc/0xe4 [ 47.091939][ T4915] el0t_64_sync+0x1a0/0x1a4 [ 47.092710][ T4915] irq event stamp: 79800 [ 47.093414][ T4915] hardirqs last enabled at (79799): [] __up_console_sem+0xb4/0xfc [ 47.094953][ T4915] hardirqs last disabled at (79800): [] el1_dbg+0x24/0x80 [ 47.096383][ T4915] softirqs last enabled at (79764): [] handle_softirqs+0xa70/0xc14 [ 47.098067][ T4915] softirqs last disabled at (79695): [] __irq_exit_rcu+0x240/0x434 [ 47.099726][ T4915] ---[ end trace 811c90d7563d9f7c ]--- [ 47.102395][ T4915] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 47.104029][ T4915] BTRFS info (device loop0): forced readonly [ 47.104974][ T4915] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 47.280544][ T4936] loop0: detected capacity change from 0 to 32768 [ 47.283029][ T4936] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4936) [ 47.287282][ T4936] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 47.288867][ T4936] BTRFS info (device loop0): enabling auto defrag [ 47.289916][ T4936] BTRFS info (device loop0): enabling disk space caching [ 47.291047][ T4936] BTRFS info (device loop0): disabling tree log [ 47.292028][ T4936] BTRFS info (device loop0): force clearing of disk cache [ 47.293392][ T4936] BTRFS info (device loop0): force zlib compression, level 3 [ 47.294836][ T4936] BTRFS info (device loop0): disabling disk space caching [ 47.295996][ T4936] BTRFS info (device loop0): has skinny extents [ 47.304048][ T4936] BTRFS info (device loop0): enabling ssd optimizations [ 47.305701][ T4936] BTRFS info (device loop0): clearing free space tree [ 47.306892][ T4936] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 47.309020][ T4936] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 47.314749][ T4936] FAULT_INJECTION: forcing a failure. [ 47.314749][ T4936] name failslab, interval 1, probability 0, space 0, times 0 [ 47.317049][ T4936] CPU: 1 PID: 4936 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.318494][ T4936] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.320362][ T4936] Call trace: [ 47.320923][ T4936] dump_backtrace+0x0/0x458 [ 47.321751][ T4936] show_stack+0x2c/0x3c [ 47.322484][ T4936] __dump_stack+0x30/0x40 [ 47.323277][ T4936] dump_stack_lvl+0xf4/0x15c [ 47.324110][ T4936] dump_stack+0x1c/0x5c [ 47.324862][ T4936] should_fail+0x3c8/0x520 [ 47.325668][ T4936] __should_failslab+0xbc/0x10c [ 47.326466][ T4936] should_failslab+0x10/0x28 [ 47.327216][ T4936] slab_pre_alloc_hook+0x64/0xe8 [ 47.328054][ T4936] kmem_cache_alloc+0x94/0x3d8 [ 47.328827][ T4936] start_transaction+0x530/0x1438 [ 47.329655][ T4936] btrfs_attach_transaction_barrier+0x30/0xac [ 47.330721][ T4936] btrfs_sync_fs+0x13c/0xb2c [ 47.331541][ T4936] sync_filesystem+0x1a0/0x218 [ 47.332342][ T4936] btrfs_remount+0x190/0x12ac [ 47.333046][ T4936] legacy_reconfigure+0xfc/0x114 [ 47.333847][ T4936] reconfigure_super+0x1d0/0x6c4 [ 47.334681][ T4936] path_mount+0xd20/0xfe8 [ 47.335386][ T4936] __arm64_sys_mount+0x488/0x5f8 [ 47.336196][ T4936] invoke_syscall+0x98/0x28c [ 47.336963][ T4936] el0_svc_common+0x13c/0x258 [ 47.337801][ T4936] do_el0_svc+0x5c/0x140 [ 47.338550][ T4936] el0_svc+0x78/0x1d0 [ 47.339236][ T4936] el0t_64_sync_handler+0xcc/0xe4 [ 47.340090][ T4936] el0t_64_sync+0x1a0/0x1a4 [ 47.515162][ T4957] loop0: detected capacity change from 0 to 32768 [ 47.517597][ T4957] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4957) [ 47.521534][ T4957] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 47.523217][ T4957] BTRFS info (device loop0): enabling auto defrag [ 47.524447][ T4957] BTRFS info (device loop0): enabling disk space caching [ 47.525815][ T4957] BTRFS info (device loop0): disabling tree log [ 47.527014][ T4957] BTRFS info (device loop0): force clearing of disk cache [ 47.528445][ T4957] BTRFS info (device loop0): force zlib compression, level 3 [ 47.529803][ T4957] BTRFS info (device loop0): disabling disk space caching [ 47.531045][ T4957] BTRFS info (device loop0): has skinny extents [ 47.547592][ T4957] BTRFS info (device loop0): enabling ssd optimizations [ 47.549534][ T4957] BTRFS info (device loop0): clearing free space tree [ 47.550837][ T4957] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 47.552581][ T4957] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 47.559541][ T4957] FAULT_INJECTION: forcing a failure. [ 47.559541][ T4957] name failslab, interval 1, probability 0, space 0, times 0 [ 47.561845][ T4957] CPU: 0 PID: 4957 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.563413][ T4957] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.565291][ T4957] Call trace: [ 47.565852][ T4957] dump_backtrace+0x0/0x458 [ 47.566747][ T4957] show_stack+0x2c/0x3c [ 47.567470][ T4957] __dump_stack+0x30/0x40 [ 47.568217][ T4957] dump_stack_lvl+0xf4/0x15c [ 47.569007][ T4957] dump_stack+0x1c/0x5c [ 47.569745][ T4957] should_fail+0x3c8/0x520 [ 47.570514][ T4957] __should_failslab+0xbc/0x10c [ 47.571351][ T4957] should_failslab+0x10/0x28 [ 47.572143][ T4957] slab_pre_alloc_hook+0x64/0xe8 [ 47.573024][ T4957] kmem_cache_alloc+0x94/0x3d8 [ 47.573849][ T4957] btrfs_alloc_path+0x5c/0x68 [ 47.574688][ T4957] __btrfs_free_extent+0x1a4/0x1ae0 [ 47.575606][ T4957] __btrfs_run_delayed_refs+0xc00/0x3484 [ 47.576573][ T4957] btrfs_run_delayed_refs+0x11c/0x460 [ 47.577510][ T4957] btrfs_commit_transaction+0x1d8/0x30ac [ 47.578484][ T4957] btrfs_sync_fs+0x240/0xb2c [ 47.579294][ T4957] sync_filesystem+0x1a0/0x218 [ 47.580101][ T4957] btrfs_remount+0x190/0x12ac [ 47.580890][ T4957] legacy_reconfigure+0xfc/0x114 [ 47.581729][ T4957] reconfigure_super+0x1d0/0x6c4 [ 47.582580][ T4957] path_mount+0xd20/0xfe8 [ 47.583320][ T4957] __arm64_sys_mount+0x488/0x5f8 [ 47.584154][ T4957] invoke_syscall+0x98/0x28c [ 47.584922][ T4957] el0_svc_common+0x13c/0x258 [ 47.585704][ T4957] do_el0_svc+0x5c/0x140 [ 47.586426][ T4957] el0_svc+0x78/0x1d0 [ 47.587108][ T4957] el0t_64_sync_handler+0xcc/0xe4 [ 47.587977][ T4957] el0t_64_sync+0x1a0/0x1a4 [ 47.591120][ T4957] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 47.593533][ T4957] ------------[ cut here ]------------ [ 47.594569][ T4957] WARNING: CPU: 0 PID: 4957 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 47.596325][ T4957] Modules linked in: [ 47.596959][ T4957] CPU: 0 PID: 4957 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.598491][ T4957] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.600151][ T4957] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 47.601458][ T4957] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 47.602425][ T4957] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 47.603405][ T4957] sp : ffff800020f87570 [ 47.604084][ T4957] x29: ffff800020f87580 x28: ffff0000d8388000 x27: dfff800000000000 [ 47.605423][ T4957] x26: dfff800000000000 x25: ffff0000dedf30b0 x24: 1fffe0001bdbe621 [ 47.606745][ T4957] x23: ffff0000dedf3108 x22: 00000000fffffff4 x21: 0000000000000000 [ 47.608094][ T4957] x20: 00000000fffffff4 x19: ffff0000dedf30b0 x18: 0000000000000000 [ 47.609493][ T4957] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 47.610815][ T4957] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 47.612147][ T4957] x11: ff8080000830061c x10: 0000000000000000 x9 : 48a47e6e87a7a200 [ 47.613478][ T4957] x8 : 48a47e6e87a7a200 x7 : 0000000000000001 x6 : 0000000000000001 [ 47.614796][ T4957] x5 : ffff800020f86e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 47.616131][ T4957] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 47.617433][ T4957] Call trace: [ 47.617944][ T4957] btrfs_run_delayed_refs+0x3e8/0x460 [ 47.618856][ T4957] btrfs_commit_transaction+0x1d8/0x30ac [ 47.619800][ T4957] btrfs_sync_fs+0x240/0xb2c [ 47.620580][ T4957] sync_filesystem+0x1a0/0x218 [ 47.621353][ T4957] btrfs_remount+0x190/0x12ac [ 47.622093][ T4957] legacy_reconfigure+0xfc/0x114 [ 47.622882][ T4957] reconfigure_super+0x1d0/0x6c4 [ 47.623696][ T4957] path_mount+0xd20/0xfe8 [ 47.624433][ T4957] __arm64_sys_mount+0x488/0x5f8 [ 47.625297][ T4957] invoke_syscall+0x98/0x28c [ 47.626059][ T4957] el0_svc_common+0x13c/0x258 [ 47.626852][ T4957] do_el0_svc+0x5c/0x140 [ 47.627560][ T4957] el0_svc+0x78/0x1d0 [ 47.628265][ T4957] el0t_64_sync_handler+0xcc/0xe4 [ 47.629080][ T4957] el0t_64_sync+0x1a0/0x1a4 [ 47.629787][ T4957] irq event stamp: 79494 [ 47.630447][ T4957] hardirqs last enabled at (79493): [] __up_console_sem+0xb4/0xfc [ 47.631986][ T4957] hardirqs last disabled at (79494): [] el1_dbg+0x24/0x80 [ 47.633501][ T4957] softirqs last enabled at (79458): [] handle_softirqs+0xa70/0xc14 [ 47.635078][ T4957] softirqs last disabled at (79437): [] __irq_exit_rcu+0x240/0x434 [ 47.636679][ T4957] ---[ end trace 811c90d7563d9f7d ]--- [ 47.637939][ T4957] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 47.639469][ T4957] BTRFS info (device loop0): forced readonly [ 47.640626][ T4957] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 47.814692][ T4978] loop0: detected capacity change from 0 to 32768 [ 47.817108][ T4978] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4978) [ 47.821437][ T4978] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 47.822906][ T4978] BTRFS info (device loop0): enabling auto defrag [ 47.824083][ T4978] BTRFS info (device loop0): enabling disk space caching [ 47.825491][ T4978] BTRFS info (device loop0): disabling tree log [ 47.826610][ T4978] BTRFS info (device loop0): force clearing of disk cache [ 47.828088][ T4978] BTRFS info (device loop0): force zlib compression, level 3 [ 47.829384][ T4978] BTRFS info (device loop0): disabling disk space caching [ 47.830663][ T4978] BTRFS info (device loop0): has skinny extents [ 47.839430][ T4978] BTRFS info (device loop0): enabling ssd optimizations [ 47.841213][ T4978] BTRFS info (device loop0): clearing free space tree [ 47.842549][ T4978] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 47.844399][ T4978] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 47.850423][ T4978] FAULT_INJECTION: forcing a failure. [ 47.850423][ T4978] name failslab, interval 1, probability 0, space 0, times 0 [ 47.852705][ T4978] CPU: 1 PID: 4978 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.854237][ T4978] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.856101][ T4978] Call trace: [ 47.856680][ T4978] dump_backtrace+0x0/0x458 [ 47.857447][ T4978] show_stack+0x2c/0x3c [ 47.858154][ T4978] __dump_stack+0x30/0x40 [ 47.859049][ T4978] dump_stack_lvl+0xf4/0x15c [ 47.859963][ T4978] dump_stack+0x1c/0x5c [ 47.860809][ T4978] should_fail+0x3c8/0x520 [ 47.861712][ T4978] __should_failslab+0xbc/0x10c [ 47.862631][ T4978] should_failslab+0x10/0x28 [ 47.863512][ T4978] slab_pre_alloc_hook+0x64/0xe8 [ 47.864379][ T4978] kmem_cache_alloc+0x94/0x3d8 [ 47.865166][ T4978] btrfs_alloc_path+0x5c/0x68 [ 47.865965][ T4978] __btrfs_free_extent+0x1a4/0x1ae0 [ 47.866806][ T4978] __btrfs_run_delayed_refs+0xc00/0x3484 [ 47.867738][ T4978] btrfs_run_delayed_refs+0x11c/0x460 [ 47.868592][ T4978] btrfs_commit_transaction+0x1d8/0x30ac [ 47.869481][ T4978] btrfs_sync_fs+0x240/0xb2c [ 47.870218][ T4978] sync_filesystem+0x1a0/0x218 [ 47.871031][ T4978] btrfs_remount+0x190/0x12ac [ 47.871812][ T4978] legacy_reconfigure+0xfc/0x114 [ 47.872687][ T4978] reconfigure_super+0x1d0/0x6c4 [ 47.873508][ T4978] path_mount+0xd20/0xfe8 [ 47.874198][ T4978] __arm64_sys_mount+0x488/0x5f8 [ 47.875038][ T4978] invoke_syscall+0x98/0x28c [ 47.875889][ T4978] el0_svc_common+0x13c/0x258 [ 47.876626][ T4978] do_el0_svc+0x5c/0x140 [ 47.877309][ T4978] el0_svc+0x78/0x1d0 [ 47.877941][ T4978] el0t_64_sync_handler+0xcc/0xe4 [ 47.878772][ T4978] el0t_64_sync+0x1a0/0x1a4 [ 47.880371][ T4978] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 47.882547][ T4978] ------------[ cut here ]------------ [ 47.883586][ T4978] WARNING: CPU: 1 PID: 4978 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 47.885178][ T4978] Modules linked in: [ 47.885816][ T4978] CPU: 1 PID: 4978 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.887219][ T4978] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.888800][ T4978] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 47.890074][ T4978] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 47.890989][ T4978] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 47.891912][ T4978] sp : ffff800021447570 [ 47.892618][ T4978] x29: ffff800021447580 x28: ffff0000c9f68000 x27: dfff800000000000 [ 47.893955][ T4978] x26: dfff800000000000 x25: ffff0000ded0c6e0 x24: 1fffe0001bda18e7 [ 47.895585][ T4978] x23: ffff0000ded0c738 x22: 00000000fffffff4 x21: 0000000000000000 [ 47.896886][ T4978] x20: 00000000fffffff4 x19: ffff0000ded0c6e0 x18: 0000000000000000 [ 47.898499][ T4978] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 47.900079][ T4978] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 47.901736][ T4978] x11: ff8080000830061c x10: 0000000000000000 x9 : ad7ec2895482d600 [ 47.903347][ T4978] x8 : ad7ec2895482d600 x7 : 0000000000000001 x6 : 0000000000000001 [ 47.904737][ T4978] x5 : ffff800021446e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 47.906056][ T4978] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 47.907309][ T4978] Call trace: [ 47.907840][ T4978] btrfs_run_delayed_refs+0x3e8/0x460 [ 47.908751][ T4978] btrfs_commit_transaction+0x1d8/0x30ac [ 47.909884][ T4978] btrfs_sync_fs+0x240/0xb2c [ 47.910831][ T4978] sync_filesystem+0x1a0/0x218 [ 47.911771][ T4978] btrfs_remount+0x190/0x12ac [ 47.912564][ T4978] legacy_reconfigure+0xfc/0x114 [ 47.913375][ T4978] reconfigure_super+0x1d0/0x6c4 [ 47.914217][ T4978] path_mount+0xd20/0xfe8 [ 47.915101][ T4978] __arm64_sys_mount+0x488/0x5f8 [ 47.916127][ T4978] invoke_syscall+0x98/0x28c [ 47.917075][ T4978] el0_svc_common+0x13c/0x258 [ 47.918007][ T4978] do_el0_svc+0x5c/0x140 [ 47.918694][ T4978] el0_svc+0x78/0x1d0 [ 47.919339][ T4978] el0t_64_sync_handler+0xcc/0xe4 [ 47.920149][ T4978] el0t_64_sync+0x1a0/0x1a4 [ 47.920870][ T4978] irq event stamp: 79642 [ 47.921623][ T4978] hardirqs last enabled at (79641): [] __up_console_sem+0xb4/0xfc [ 47.923144][ T4978] hardirqs last disabled at (79642): [] el1_dbg+0x24/0x80 [ 47.924579][ T4978] softirqs last enabled at (79610): [] handle_softirqs+0xa70/0xc14 [ 47.926283][ T4978] softirqs last disabled at (79543): [] __irq_exit_rcu+0x240/0x434 [ 47.927933][ T4978] ---[ end trace 811c90d7563d9f7e ]--- [ 47.929042][ T4978] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 47.930637][ T4978] BTRFS info (device loop0): forced readonly [ 47.931731][ T4978] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 48.113795][ T4999] loop0: detected capacity change from 0 to 32768 [ 48.116300][ T4999] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4999) [ 48.121041][ T4999] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 48.122673][ T4999] BTRFS info (device loop0): enabling auto defrag [ 48.123859][ T4999] BTRFS info (device loop0): enabling disk space caching [ 48.125211][ T4999] BTRFS info (device loop0): disabling tree log [ 48.126393][ T4999] BTRFS info (device loop0): force clearing of disk cache [ 48.127784][ T4999] BTRFS info (device loop0): force zlib compression, level 3 [ 48.129080][ T4999] BTRFS info (device loop0): disabling disk space caching [ 48.130354][ T4999] BTRFS info (device loop0): has skinny extents [ 48.144220][ T4999] BTRFS info (device loop0): enabling ssd optimizations [ 48.146036][ T4999] BTRFS info (device loop0): clearing free space tree [ 48.147244][ T4999] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 48.149292][ T4999] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 48.155343][ T4999] FAULT_INJECTION: forcing a failure. [ 48.155343][ T4999] name failslab, interval 1, probability 0, space 0, times 0 [ 48.158949][ T4999] CPU: 0 PID: 4999 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.160462][ T4999] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.162212][ T4999] Call trace: [ 48.162792][ T4999] dump_backtrace+0x0/0x458 [ 48.163613][ T4999] show_stack+0x2c/0x3c [ 48.164399][ T4999] __dump_stack+0x30/0x40 [ 48.165203][ T4999] dump_stack_lvl+0xf4/0x15c [ 48.166050][ T4999] dump_stack+0x1c/0x5c [ 48.166900][ T4999] should_fail+0x3c8/0x520 [ 48.167758][ T4999] __should_failslab+0xbc/0x10c [ 48.168677][ T4999] should_failslab+0x10/0x28 [ 48.169433][ T4999] slab_pre_alloc_hook+0x64/0xe8 [ 48.170210][ T4999] kmem_cache_alloc+0x94/0x3d8 [ 48.170981][ T4999] start_transaction+0x530/0x1438 [ 48.171847][ T4999] btrfs_attach_transaction_barrier+0x30/0xac [ 48.172834][ T4999] btrfs_sync_fs+0x13c/0xb2c [ 48.173619][ T4999] sync_filesystem+0x1a0/0x218 [ 48.174468][ T4999] btrfs_remount+0x190/0x12ac [ 48.175279][ T4999] legacy_reconfigure+0xfc/0x114 [ 48.176168][ T4999] reconfigure_super+0x1d0/0x6c4 [ 48.177023][ T4999] path_mount+0xd20/0xfe8 [ 48.177771][ T4999] __arm64_sys_mount+0x488/0x5f8 [ 48.178631][ T4999] invoke_syscall+0x98/0x28c [ 48.179356][ T4999] el0_svc_common+0x13c/0x258 [ 48.180125][ T4999] do_el0_svc+0x5c/0x140 [ 48.180922][ T4999] el0_svc+0x78/0x1d0 [ 48.181600][ T4999] el0t_64_sync_handler+0xcc/0xe4 [ 48.182598][ T4999] el0t_64_sync+0x1a0/0x1a4 [ 48.367320][ T5020] loop0: detected capacity change from 0 to 32768 [ 48.370818][ T5020] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5020) [ 48.374391][ T5020] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 48.376041][ T5020] BTRFS info (device loop0): enabling auto defrag [ 48.377246][ T5020] BTRFS info (device loop0): enabling disk space caching [ 48.378549][ T5020] BTRFS info (device loop0): disabling tree log [ 48.379676][ T5020] BTRFS info (device loop0): force clearing of disk cache [ 48.381009][ T5020] BTRFS info (device loop0): force zlib compression, level 3 [ 48.382423][ T5020] BTRFS info (device loop0): disabling disk space caching [ 48.383678][ T5020] BTRFS info (device loop0): has skinny extents [ 48.392565][ T5020] BTRFS info (device loop0): enabling ssd optimizations [ 48.394238][ T5020] BTRFS info (device loop0): clearing free space tree [ 48.395589][ T5020] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 48.397275][ T5020] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 48.403052][ T5020] FAULT_INJECTION: forcing a failure. [ 48.403052][ T5020] name failslab, interval 1, probability 0, space 0, times 0 [ 48.405304][ T5020] CPU: 1 PID: 5020 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.406822][ T5020] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.408519][ T5020] Call trace: [ 48.409116][ T5020] dump_backtrace+0x0/0x458 [ 48.409855][ T5020] show_stack+0x2c/0x3c [ 48.410512][ T5020] __dump_stack+0x30/0x40 [ 48.411255][ T5020] dump_stack_lvl+0xf4/0x15c [ 48.412029][ T5020] dump_stack+0x1c/0x5c [ 48.412711][ T5020] should_fail+0x3c8/0x520 [ 48.413437][ T5020] __should_failslab+0xbc/0x10c [ 48.414357][ T5020] should_failslab+0x10/0x28 [ 48.415258][ T5020] slab_pre_alloc_hook+0x64/0xe8 [ 48.416151][ T5020] kmem_cache_alloc+0x94/0x3d8 [ 48.417066][ T5020] btrfs_alloc_path+0x5c/0x68 [ 48.417980][ T5020] __btrfs_run_delayed_refs+0xe6c/0x3484 [ 48.419158][ T5020] btrfs_run_delayed_refs+0x11c/0x460 [ 48.420088][ T5020] btrfs_commit_transaction+0x1d8/0x30ac [ 48.421063][ T5020] btrfs_sync_fs+0x240/0xb2c [ 48.421898][ T5020] sync_filesystem+0x1a0/0x218 [ 48.422738][ T5020] btrfs_remount+0x190/0x12ac [ 48.423536][ T5020] legacy_reconfigure+0xfc/0x114 [ 48.424364][ T5020] reconfigure_super+0x1d0/0x6c4 [ 48.425195][ T5020] path_mount+0xd20/0xfe8 [ 48.425946][ T5020] __arm64_sys_mount+0x488/0x5f8 [ 48.426784][ T5020] invoke_syscall+0x98/0x28c [ 48.427547][ T5020] el0_svc_common+0x13c/0x258 [ 48.428341][ T5020] do_el0_svc+0x5c/0x140 [ 48.429063][ T5020] el0_svc+0x78/0x1d0 [ 48.429764][ T5020] el0t_64_sync_handler+0xcc/0xe4 [ 48.430606][ T5020] el0t_64_sync+0x1a0/0x1a4 [ 48.432337][ T5020] BTRFS error (device loop0): failed to run delayed ref for logical 5251072 num_bytes 4096 type 176 action 1 ref_mod 1: -12 [ 48.434601][ T5020] ------------[ cut here ]------------ [ 48.435845][ T5020] WARNING: CPU: 1 PID: 5020 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 48.437626][ T5020] Modules linked in: [ 48.437808][ T4543] Bluetooth: hci0: command 0x0419 tx timeout [ 48.438323][ T5020] CPU: 1 PID: 5020 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.440896][ T5020] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.442501][ T5020] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 48.443728][ T5020] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 48.444639][ T5020] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 48.445543][ T5020] sp : ffff8000214e7570 [ 48.446181][ T5020] x29: ffff8000214e7580 x28: ffff0000d92aa000 x27: dfff800000000000 [ 48.447458][ T5020] x26: dfff800000000000 x25: ffff0000ded0c8f0 x24: 1fffe0001bda1929 [ 48.448729][ T5020] x23: ffff0000ded0c948 x22: 00000000fffffff4 x21: 0000000000000000 [ 48.450012][ T5020] x20: 00000000fffffff4 x19: ffff0000ded0c8f0 x18: 0000000000000000 [ 48.451303][ T5020] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 48.452643][ T5020] x14: 0000000000000001 x13: 1fffe000341d2dab x12: 0000000000000000 [ 48.454061][ T5020] x11: ff8080000830061c x10: 0000000000000000 x9 : 0773c90f20959c00 [ 48.455557][ T5020] x8 : 0773c90f20959c00 x7 : 0000000000000001 x6 : 0000000000000001 [ 48.456829][ T5020] x5 : ffff8000214e6e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 48.458138][ T5020] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 48.459543][ T5020] Call trace: [ 48.460131][ T5020] btrfs_run_delayed_refs+0x3e8/0x460 [ 48.461066][ T5020] btrfs_commit_transaction+0x1d8/0x30ac [ 48.462030][ T5020] btrfs_sync_fs+0x240/0xb2c [ 48.462819][ T5020] sync_filesystem+0x1a0/0x218 [ 48.463602][ T5020] btrfs_remount+0x190/0x12ac [ 48.464372][ T5020] legacy_reconfigure+0xfc/0x114 [ 48.465390][ T5020] reconfigure_super+0x1d0/0x6c4 [ 48.466377][ T5020] path_mount+0xd20/0xfe8 [ 48.467205][ T5020] __arm64_sys_mount+0x488/0x5f8 [ 48.468143][ T5020] invoke_syscall+0x98/0x28c [ 48.468999][ T5020] el0_svc_common+0x13c/0x258 [ 48.469880][ T5020] do_el0_svc+0x5c/0x140 [ 48.470609][ T5020] el0_svc+0x78/0x1d0 [ 48.471293][ T5020] el0t_64_sync_handler+0xcc/0xe4 [ 48.472149][ T5020] el0t_64_sync+0x1a0/0x1a4 [ 48.473006][ T5020] irq event stamp: 79338 [ 48.473779][ T5020] hardirqs last enabled at (79337): [] __up_console_sem+0xb4/0xfc [ 48.475532][ T5020] hardirqs last disabled at (79338): [] el1_dbg+0x24/0x80 [ 48.477104][ T5020] softirqs last enabled at (79296): [] handle_softirqs+0xa70/0xc14 [ 48.478857][ T5020] softirqs last disabled at (79275): [] __irq_exit_rcu+0x240/0x434 [ 48.480766][ T5020] ---[ end trace 811c90d7563d9f7f ]--- [ 48.482736][ T5020] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 48.484506][ T5020] BTRFS info (device loop0): forced readonly [ 48.485583][ T5020] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 48.655606][ T5041] loop0: detected capacity change from 0 to 32768 [ 48.665059][ T5041] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5041) [ 48.671334][ T5041] BTRFS info (device loop0): using sha256 (sha256-ce) checksum algorithm [ 48.672705][ T5041] BTRFS info (device loop0): enabling auto defrag [ 48.673753][ T5041] BTRFS info (device loop0): enabling disk space caching [ 48.674825][ T5041] BTRFS info (device loop0): disabling tree log [ 48.675831][ T5041] BTRFS info (device loop0): force clearing of disk cache [ 48.676900][ T5041] BTRFS info (device loop0): force zlib compression, level 3 [ 48.678575][ T5041] BTRFS info (device loop0): disabling disk space caching [ 48.679715][ T5041] BTRFS info (device loop0): has skinny extents [ 48.692057][ T5041] BTRFS info (device loop0): enabling ssd optimizations [ 48.693629][ T5041] BTRFS info (device loop0): clearing free space tree [ 48.694805][ T5041] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) [ 48.696454][ T5041] BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) [ 48.702562][ T5041] FAULT_INJECTION: forcing a failure. [ 48.702562][ T5041] name failslab, interval 1, probability 0, space 0, times 0 [ 48.704639][ T5041] CPU: 0 PID: 5041 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.706117][ T5041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.707923][ T5041] Call trace: [ 48.708526][ T5041] dump_backtrace+0x0/0x458 [ 48.709362][ T5041] show_stack+0x2c/0x3c [ 48.710133][ T5041] __dump_stack+0x30/0x40 [ 48.710923][ T5041] dump_stack_lvl+0xf4/0x15c [ 48.711705][ T5041] dump_stack+0x1c/0x5c [ 48.712448][ T5041] should_fail+0x3c8/0x520 [ 48.713175][ T5041] __should_failslab+0xbc/0x10c [ 48.713979][ T5041] should_failslab+0x10/0x28 [ 48.714726][ T5041] slab_pre_alloc_hook+0x64/0xe8 [ 48.715511][ T5041] kmem_cache_alloc+0x94/0x3d8 [ 48.716306][ T5041] btrfs_alloc_path+0x5c/0x68 [ 48.717083][ T5041] __btrfs_run_delayed_refs+0xe6c/0x3484 [ 48.718012][ T5041] btrfs_run_delayed_refs+0x11c/0x460 [ 48.718924][ T5041] btrfs_commit_transaction+0x1d8/0x30ac [ 48.719854][ T5041] btrfs_sync_fs+0x240/0xb2c [ 48.720644][ T5041] sync_filesystem+0x1a0/0x218 [ 48.721480][ T5041] btrfs_remount+0x190/0x12ac [ 48.722292][ T5041] legacy_reconfigure+0xfc/0x114 [ 48.723146][ T5041] reconfigure_super+0x1d0/0x6c4 [ 48.723975][ T5041] path_mount+0xd20/0xfe8 [ 48.724700][ T5041] __arm64_sys_mount+0x488/0x5f8 [ 48.725532][ T5041] invoke_syscall+0x98/0x28c [ 48.726368][ T5041] el0_svc_common+0x13c/0x258 [ 48.727161][ T5041] do_el0_svc+0x5c/0x140 [ 48.727886][ T5041] el0_svc+0x78/0x1d0 [ 48.728576][ T5041] el0t_64_sync_handler+0xcc/0xe4 [ 48.729441][ T5041] el0t_64_sync+0x1a0/0x1a4 [ 48.732749][ T5041] BTRFS error (device loop0): failed to run delayed ref for logical 5251072 num_bytes 4096 type 176 action 1 ref_mod 1: -12 [ 48.734968][ T5041] ------------[ cut here ]------------ [ 48.736074][ T5041] WARNING: CPU: 0 PID: 5041 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 48.737993][ T5041] Modules linked in: [ 48.738714][ T5041] CPU: 0 PID: 5041 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.740345][ T5041] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.741981][ T5041] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 48.743275][ T5041] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 48.744222][ T5041] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 48.745140][ T5041] sp : ffff8000214e7570 [ 48.745837][ T5041] x29: ffff8000214e7580 x28: ffff0000d838f000 x27: dfff800000000000 [ 48.747101][ T5041] x26: dfff800000000000 x25: ffff0000dedf3580 x24: 1fffe0001bdbe6bb [ 48.748402][ T5041] x23: ffff0000dedf35d8 x22: 00000000fffffff4 x21: 0000000000000000 [ 48.749720][ T5041] x20: 00000000fffffff4 x19: ffff0000dedf3580 x18: 0000000000000000 [ 48.751013][ T5041] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 48.752362][ T5041] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 48.753686][ T5041] x11: ff8080000830061c x10: 0000000000000000 x9 : 25f6175437344600 [ 48.754991][ T5041] x8 : 25f6175437344600 x7 : 0000000000000001 x6 : 0000000000000001 [ 48.756330][ T5041] x5 : ffff8000214e6e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 48.757774][ T5041] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 48.759101][ T5041] Call trace: [ 48.759725][ T5041] btrfs_run_delayed_refs+0x3e8/0x460 [ 48.760690][ T5041] btrfs_commit_transaction+0x1d8/0x30ac [ 48.761674][ T5041] btrfs_sync_fs+0x240/0xb2c [ 48.762412][ T5041] sync_filesystem+0x1a0/0x218 [ 48.763230][ T5041] btrfs_remount+0x190/0x12ac [ 48.764055][ T5041] legacy_reconfigure+0xfc/0x114 [ 48.764916][ T5041] reconfigure_super+0x1d0/0x6c4 [ 48.765761][ T5041] path_mount+0xd20/0xfe8 [ 48.766492][ T5041] __arm64_sys_mount+0x488/0x5f8 [ 48.767279][ T5041] invoke_syscall+0x98/0x28c [ 48.768026][ T5041] el0_svc_common+0x13c/0x258 [ 48.768764][ T5041] do_el0_svc+0x5c/0x140 [ 48.769457][ T5041] el0_svc+0x78/0x1d0 [ 48.770083][ T5041] el0t_64_sync_handler+0xcc/0xe4 [ 48.770907][ T5041] el0t_64_sync+0x1a0/0x1a4 [ 48.771639][ T5041] irq event stamp: 79440 [ 48.772283][ T5041] hardirqs last enabled at (79439): [] __up_console_sem+0xb4/0xfc [ 48.773751][ T5041] hardirqs last disabled at (79440): [] el1_dbg+0x24/0x80 [ 48.775119][ T5041] softirqs last enabled at (79402): [] handle_softirqs+0xa70/0xc14 [ 48.776659][ T5041] softirqs last disabled at (79335): [] __irq_exit_rcu+0x240/0x434 [ 48.778113][ T5041] ---[ end trace 811c90d7563d9f80 ]--- [ 48.779931][ T5041] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 48.781686][ T5041] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 48.955461][ T5062] loop0: detected capacity change from 0 to 32768 [ 48.957974][ T5062] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5062) [ 48.977620][ T5062] FAULT_INJECTION: forcing a failure. [ 48.977620][ T5062] name failslab, interval 1, probability 0, space 0, times 0 [ 48.980093][ T5062] CPU: 1 PID: 5062 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.981686][ T5062] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.983506][ T5062] Call trace: [ 48.984113][ T5062] dump_backtrace+0x0/0x458 [ 48.984903][ T5062] show_stack+0x2c/0x3c [ 48.985616][ T5062] __dump_stack+0x30/0x40 [ 48.986450][ T5062] dump_stack_lvl+0xf4/0x15c [ 48.987273][ T5062] dump_stack+0x1c/0x5c [ 48.987987][ T5062] should_fail+0x3c8/0x520 [ 48.988790][ T5062] __should_failslab+0xbc/0x10c [ 48.989686][ T5062] should_failslab+0x10/0x28 [ 48.990406][ T5062] slab_pre_alloc_hook+0x64/0xe8 [ 48.991294][ T5062] kmem_cache_alloc+0x94/0x3d8 [ 48.992114][ T5062] alloc_extent_state+0x38/0x434 [ 48.992949][ T5062] set_extent_bit+0x1ac/0x13a8 [ 48.993727][ T5062] btrfs_alloc_tree_block+0x930/0x10f0 [ 48.994629][ T5062] btrfs_force_cow_block+0x3ac/0x172c [ 48.995712][ T5062] btrfs_cow_block+0x2d4/0x674 [ 48.996666][ T5062] btrfs_search_slot+0xa10/0x1ec8 [ 48.997660][ T5062] lookup_inline_extent_backref+0x284/0xd4c [ 48.998794][ T5062] __btrfs_free_extent+0x21c/0x1ae0 [ 48.999775][ T5062] __btrfs_run_delayed_refs+0xc00/0x3484 [ 49.000794][ T5062] btrfs_run_delayed_refs+0x11c/0x460 [ 49.001727][ T5062] btrfs_commit_transaction+0x1d8/0x30ac [ 49.002701][ T5062] btrfs_sync_fs+0x240/0xb2c [ 49.003495][ T5062] sync_filesystem+0x1a0/0x218 [ 49.004330][ T5062] btrfs_remount+0x190/0x12ac [ 49.005085][ T5062] legacy_reconfigure+0xfc/0x114 [ 49.005911][ T5062] reconfigure_super+0x1d0/0x6c4 [ 49.006747][ T5062] path_mount+0xd20/0xfe8 [ 49.007481][ T5062] __arm64_sys_mount+0x488/0x5f8 [ 49.008282][ T5062] invoke_syscall+0x98/0x28c [ 49.009016][ T5062] el0_svc_common+0x13c/0x258 [ 49.009774][ T5062] do_el0_svc+0x5c/0x140 [ 49.010426][ T5062] el0_svc+0x78/0x1d0 [ 49.011127][ T5062] el0t_64_sync_handler+0xcc/0xe4 [ 49.011952][ T5062] el0t_64_sync+0x1a0/0x1a4 [ 49.195183][ T5083] loop0: detected capacity change from 0 to 32768 [ 49.197770][ T5083] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5083) [ 49.215677][ T5083] FAULT_INJECTION: forcing a failure. [ 49.215677][ T5083] name failslab, interval 1, probability 0, space 0, times 0 [ 49.218299][ T5083] CPU: 0 PID: 5083 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.219824][ T5083] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.221434][ T5083] Call trace: [ 49.221997][ T5083] dump_backtrace+0x0/0x458 [ 49.222746][ T5083] show_stack+0x2c/0x3c [ 49.223443][ T5083] __dump_stack+0x30/0x40 [ 49.224170][ T5083] dump_stack_lvl+0xf4/0x15c [ 49.224922][ T5083] dump_stack+0x1c/0x5c [ 49.225602][ T5083] should_fail+0x3c8/0x520 [ 49.226371][ T5083] __should_failslab+0xbc/0x10c [ 49.227221][ T5083] should_failslab+0x10/0x28 [ 49.228004][ T5083] slab_pre_alloc_hook+0x64/0xe8 [ 49.228820][ T5083] kmem_cache_alloc+0x94/0x3d8 [ 49.229648][ T5083] btrfs_alloc_path+0x5c/0x68 [ 49.230450][ T5083] __btrfs_free_extent+0x1a4/0x1ae0 [ 49.231319][ T5083] __btrfs_run_delayed_refs+0xc00/0x3484 [ 49.232241][ T5083] btrfs_run_delayed_refs+0x11c/0x460 [ 49.233181][ T5083] btrfs_commit_transaction+0x1d8/0x30ac [ 49.234121][ T5083] btrfs_sync_fs+0x240/0xb2c [ 49.235074][ T5083] sync_filesystem+0x1a0/0x218 [ 49.236030][ T5083] btrfs_remount+0x190/0x12ac [ 49.236968][ T5083] legacy_reconfigure+0xfc/0x114 [ 49.237926][ T5083] reconfigure_super+0x1d0/0x6c4 [ 49.238866][ T5083] path_mount+0xd20/0xfe8 [ 49.239712][ T5083] __arm64_sys_mount+0x488/0x5f8 [ 49.240607][ T5083] invoke_syscall+0x98/0x28c [ 49.241356][ T5083] el0_svc_common+0x13c/0x258 [ 49.242113][ T5083] do_el0_svc+0x5c/0x140 [ 49.242785][ T5083] el0_svc+0x78/0x1d0 [ 49.243413][ T5083] el0t_64_sync_handler+0xcc/0xe4 [ 49.244208][ T5083] el0t_64_sync+0x1a0/0x1a4 [ 49.245099][ T5083] BTRFS error (device loop0): failed to run delayed ref for logical 5255168 num_bytes 4096 type 176 action 2 ref_mod 1: -12 [ 49.247844][ T5083] ------------[ cut here ]------------ [ 49.248950][ T5083] WARNING: CPU: 0 PID: 5083 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 49.250769][ T5083] Modules linked in: [ 49.251472][ T5083] CPU: 0 PID: 5083 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.253033][ T5083] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.254709][ T5083] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 49.255943][ T5083] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 49.256885][ T5083] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 49.257792][ T5083] sp : ffff800021927570 [ 49.258471][ T5083] x29: ffff800021927580 x28: ffff0000d3377000 x27: dfff800000000000 [ 49.259774][ T5083] x26: dfff800000000000 x25: ffff0000dedf38f0 x24: 1fffe0001bdbe729 [ 49.261131][ T5083] x23: ffff0000dedf3948 x22: 00000000fffffff4 x21: 0000000000000000 [ 49.262422][ T5083] x20: 00000000fffffff4 x19: ffff0000dedf38f0 x18: 0000000000000000 [ 49.263885][ T5083] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 49.265324][ T5083] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 49.266758][ T5083] x11: ff8080000830061c x10: 0000000000000000 x9 : d81a3777ca451a00 [ 49.268144][ T5083] x8 : d81a3777ca451a00 x7 : 0000000000000001 x6 : 0000000000000001 [ 49.269574][ T5083] x5 : ffff800021926e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 49.271237][ T5083] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 49.272676][ T5083] Call trace: [ 49.273249][ T5083] btrfs_run_delayed_refs+0x3e8/0x460 [ 49.274167][ T5083] btrfs_commit_transaction+0x1d8/0x30ac [ 49.275150][ T5083] btrfs_sync_fs+0x240/0xb2c [ 49.275952][ T5083] sync_filesystem+0x1a0/0x218 [ 49.276718][ T5083] btrfs_remount+0x190/0x12ac [ 49.277500][ T5083] legacy_reconfigure+0xfc/0x114 [ 49.278325][ T5083] reconfigure_super+0x1d0/0x6c4 [ 49.279152][ T5083] path_mount+0xd20/0xfe8 [ 49.279847][ T5083] __arm64_sys_mount+0x488/0x5f8 [ 49.280676][ T5083] invoke_syscall+0x98/0x28c [ 49.281432][ T5083] el0_svc_common+0x13c/0x258 [ 49.282344][ T5083] do_el0_svc+0x5c/0x140 [ 49.283141][ T5083] el0_svc+0x78/0x1d0 [ 49.283894][ T5083] el0t_64_sync_handler+0xcc/0xe4 [ 49.284832][ T5083] el0t_64_sync+0x1a0/0x1a4 [ 49.285691][ T5083] irq event stamp: 79002 [ 49.286503][ T5083] hardirqs last enabled at (79001): [] __up_console_sem+0xb4/0xfc [ 49.288215][ T5083] hardirqs last disabled at (79002): [] el1_dbg+0x24/0x80 [ 49.289956][ T5083] softirqs last enabled at (78980): [] handle_softirqs+0xa70/0xc14 [ 49.291794][ T5083] softirqs last disabled at (78953): [] __irq_exit_rcu+0x240/0x434 [ 49.293687][ T5083] ---[ end trace 811c90d7563d9f81 ]--- [ 49.294870][ T5083] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 49.296704][ T5083] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 49.469911][ T5104] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5104) [ 49.490081][ T5104] FAULT_INJECTION: forcing a failure. [ 49.490081][ T5104] name failslab, interval 1, probability 0, space 0, times 0 [ 49.492452][ T5104] CPU: 1 PID: 5104 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.494156][ T5104] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.496184][ T5104] Call trace: [ 49.496851][ T5104] dump_backtrace+0x0/0x458 [ 49.497780][ T5104] show_stack+0x2c/0x3c [ 49.498547][ T5104] __dump_stack+0x30/0x40 [ 49.499361][ T5104] dump_stack_lvl+0xf4/0x15c [ 49.500256][ T5104] dump_stack+0x1c/0x5c [ 49.501113][ T5104] should_fail+0x3c8/0x520 [ 49.501932][ T5104] __should_failslab+0xbc/0x10c [ 49.502799][ T5104] should_failslab+0x10/0x28 [ 49.503664][ T5104] slab_pre_alloc_hook+0x64/0xe8 [ 49.504666][ T5104] kmem_cache_alloc+0x94/0x3d8 [ 49.505587][ T5104] start_transaction+0x530/0x1438 [ 49.506557][ T5104] btrfs_attach_transaction_barrier+0x30/0xac [ 49.507801][ T5104] btrfs_sync_fs+0x13c/0xb2c [ 49.508688][ T5104] sync_filesystem+0x1a0/0x218 [ 49.509448][ T5104] btrfs_remount+0x190/0x12ac [ 49.510214][ T5104] legacy_reconfigure+0xfc/0x114 [ 49.511039][ T5104] reconfigure_super+0x1d0/0x6c4 [ 49.511863][ T5104] path_mount+0xd20/0xfe8 [ 49.512551][ T5104] __arm64_sys_mount+0x488/0x5f8 [ 49.513347][ T5104] invoke_syscall+0x98/0x28c [ 49.514274][ T5104] el0_svc_common+0x13c/0x258 [ 49.515236][ T5104] do_el0_svc+0x5c/0x140 [ 49.516104][ T5104] el0_svc+0x78/0x1d0 [ 49.516932][ T5104] el0t_64_sync_handler+0xcc/0xe4 [ 49.517979][ T5104] el0t_64_sync+0x1a0/0x1a4 [ 49.686456][ T5125] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5125) [ 49.718524][ T5125] FAULT_INJECTION: forcing a failure. [ 49.718524][ T5125] name failslab, interval 1, probability 0, space 0, times 0 [ 49.720961][ T5125] CPU: 0 PID: 5125 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.722541][ T5125] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.724438][ T5125] Call trace: [ 49.725038][ T5125] dump_backtrace+0x0/0x458 [ 49.725890][ T5125] show_stack+0x2c/0x3c [ 49.726611][ T5125] __dump_stack+0x30/0x40 [ 49.727379][ T5125] dump_stack_lvl+0xf4/0x15c [ 49.728191][ T5125] dump_stack+0x1c/0x5c [ 49.728965][ T5125] should_fail+0x3c8/0x520 [ 49.729682][ T5125] __should_failslab+0xbc/0x10c [ 49.730473][ T5125] should_failslab+0x10/0x28 [ 49.731359][ T5125] slab_pre_alloc_hook+0x64/0xe8 [ 49.732210][ T5125] kmem_cache_alloc+0x94/0x3d8 [ 49.732993][ T5125] btrfs_alloc_path+0x5c/0x68 [ 49.733832][ T5125] __btrfs_run_delayed_refs+0xe6c/0x3484 [ 49.734701][ T5125] btrfs_run_delayed_refs+0x11c/0x460 [ 49.735569][ T5125] btrfs_commit_transaction+0x1d8/0x30ac [ 49.736472][ T5125] btrfs_sync_fs+0x240/0xb2c [ 49.737244][ T5125] sync_filesystem+0x1a0/0x218 [ 49.738204][ T5125] btrfs_remount+0x190/0x12ac [ 49.739121][ T5125] legacy_reconfigure+0xfc/0x114 [ 49.740075][ T5125] reconfigure_super+0x1d0/0x6c4 [ 49.741041][ T5125] path_mount+0xd20/0xfe8 [ 49.741902][ T5125] __arm64_sys_mount+0x488/0x5f8 [ 49.742698][ T5125] invoke_syscall+0x98/0x28c [ 49.743434][ T5125] el0_svc_common+0x13c/0x258 [ 49.744251][ T5125] do_el0_svc+0x5c/0x140 [ 49.744956][ T5125] el0_svc+0x78/0x1d0 [ 49.745658][ T5125] el0t_64_sync_handler+0xcc/0xe4 [ 49.746541][ T5125] el0t_64_sync+0x1a0/0x1a4 [ 49.749387][ T5125] BTRFS error (device loop0): failed to run delayed ref for logical 5246976 num_bytes 4096 type 176 action 1 ref_mod 1: -12 [ 49.751611][ T5125] ------------[ cut here ]------------ [ 49.752690][ T5125] WARNING: CPU: 0 PID: 5125 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 49.754515][ T5125] Modules linked in: [ 49.755232][ T5125] CPU: 0 PID: 5125 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.756803][ T5125] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.758460][ T5125] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 49.759784][ T5125] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 49.760736][ T5125] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 49.761666][ T5125] sp : ffff800022027570 [ 49.762356][ T5125] x29: ffff800022027580 x28: ffff0000d92ad000 x27: dfff800000000000 [ 49.763888][ T5125] x26: dfff800000000000 x25: ffff0000dedf3bb0 x24: 1fffe0001bdbe781 [ 49.765275][ T5125] x23: ffff0000dedf3c08 x22: 00000000fffffff4 x21: 0000000000000000 [ 49.766680][ T5125] x20: 00000000fffffff4 x19: ffff0000dedf3bb0 x18: 0000000000000000 [ 49.768153][ T5125] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 49.769606][ T5125] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 49.770997][ T5125] x11: ff8080000830061c x10: 0000000000000000 x9 : cbdb3cd496e5e500 [ 49.772343][ T5125] x8 : cbdb3cd496e5e500 x7 : 0000000000000001 x6 : 0000000000000001 [ 49.773687][ T5125] x5 : ffff800022026e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 49.775061][ T5125] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 49.776385][ T5125] Call trace: [ 49.776929][ T5125] btrfs_run_delayed_refs+0x3e8/0x460 [ 49.777794][ T5125] btrfs_commit_transaction+0x1d8/0x30ac [ 49.778738][ T5125] btrfs_sync_fs+0x240/0xb2c [ 49.779494][ T5125] sync_filesystem+0x1a0/0x218 [ 49.780305][ T5125] btrfs_remount+0x190/0x12ac [ 49.781042][ T5125] legacy_reconfigure+0xfc/0x114 [ 49.781807][ T5125] reconfigure_super+0x1d0/0x6c4 [ 49.782602][ T5125] path_mount+0xd20/0xfe8 [ 49.783313][ T5125] __arm64_sys_mount+0x488/0x5f8 [ 49.784131][ T5125] invoke_syscall+0x98/0x28c [ 49.784853][ T5125] el0_svc_common+0x13c/0x258 [ 49.785608][ T5125] do_el0_svc+0x5c/0x140 [ 49.786271][ T5125] el0_svc+0x78/0x1d0 [ 49.786934][ T5125] el0t_64_sync_handler+0xcc/0xe4 [ 49.787804][ T5125] el0t_64_sync+0x1a0/0x1a4 [ 49.788524][ T5125] irq event stamp: 79312 [ 49.789224][ T5125] hardirqs last enabled at (79311): [] __up_console_sem+0xb4/0xfc [ 49.790846][ T5125] hardirqs last disabled at (79312): [] el1_dbg+0x24/0x80 [ 49.792301][ T5125] softirqs last enabled at (79274): [] handle_softirqs+0xa70/0xc14 [ 49.793871][ T5125] softirqs last disabled at (79263): [] __irq_exit_rcu+0x240/0x434 [ 49.795569][ T5125] ---[ end trace 811c90d7563d9f82 ]--- [ 49.797814][ T5125] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 49.799431][ T5125] BTRFS error (device loop0): Remounting read-write after error is not allowed [ 49.972730][ T5146] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5146) [ 50.002797][ T5146] FAULT_INJECTION: forcing a failure. [ 50.002797][ T5146] name failslab, interval 1, probability 0, space 0, times 0 [ 50.005216][ T5146] CPU: 0 PID: 5146 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 50.006751][ T5146] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 50.008456][ T5146] Call trace: [ 50.009109][ T5146] dump_backtrace+0x0/0x458 [ 50.010006][ T5146] show_stack+0x2c/0x3c [ 50.010705][ T5146] __dump_stack+0x30/0x40 [ 50.011438][ T5146] dump_stack_lvl+0xf4/0x15c [ 50.012215][ T5146] dump_stack+0x1c/0x5c [ 50.012887][ T5146] should_fail+0x3c8/0x520 [ 50.013627][ T5146] __should_failslab+0xbc/0x10c [ 50.014518][ T5146] should_failslab+0x10/0x28 [ 50.015265][ T5146] slab_pre_alloc_hook+0x64/0xe8 [ 50.016090][ T5146] kmem_cache_alloc+0x94/0x3d8 [ 50.016889][ T5146] start_transaction+0x530/0x1438 [ 50.017737][ T5146] btrfs_attach_transaction_barrier+0x30/0xac [ 50.018744][ T5146] btrfs_sync_fs+0x13c/0xb2c [ 50.019501][ T5146] sync_filesystem+0x1a0/0x218 [ 50.020333][ T5146] btrfs_remount+0x190/0x12ac [ 50.021135][ T5146] legacy_reconfigure+0xfc/0x114 [ 50.021960][ T5146] reconfigure_super+0x1d0/0x6c4 [ 50.022796][ T5146] path_mount+0xd20/0xfe8 [ 50.023558][ T5146] __arm64_sys_mount+0x488/0x5f8 [ 50.024318][ T5146] invoke_syscall+0x98/0x28c [ 50.025209][ T5146] el0_svc_common+0x13c/0x258 [ 50.026068][ T5146] do_el0_svc+0x5c/0x140 [ 50.026821][ T5146] el0_svc+0x78/0x1d0 [ 50.027485][ T5146] el0t_64_sync_handler+0xcc/0xe4 [ 50.028334][ T5146] el0t_64_sync+0x1a0/0x1a4 [ 50.245472][ T5167] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5167) [ 50.269818][ T5167] FAULT_INJECTION: forcing a failure. [ 50.269818][ T5167] name failslab, interval 1, probability 0, space 0, times 0 [ 50.271862][ T5167] CPU: 0 PID: 5167 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 50.273606][ T5167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 50.275277][ T5167] Call trace: [ 50.275813][ T5167] dump_backtrace+0x0/0x458 [ 50.276560][ T5167] show_stack+0x2c/0x3c [ 50.277240][ T5167] __dump_stack+0x30/0x40 [ 50.277881][ T5167] dump_stack_lvl+0xf4/0x15c [ 50.278656][ T5167] dump_stack+0x1c/0x5c [ 50.279340][ T5167] should_fail+0x3c8/0x520 [ 50.280089][ T5167] __should_failslab+0xbc/0x10c [ 50.280880][ T5167] should_failslab+0x10/0x28 [ 50.281631][ T5167] slab_pre_alloc_hook+0x64/0xe8 [ 50.282394][ T5167] kmem_cache_alloc+0x94/0x3d8 [ 50.283169][ T5167] btrfs_alloc_path+0x5c/0x68 [ 50.283948][ T5167] __btrfs_run_delayed_refs+0xe6c/0x3484 [ 50.284881][ T5167] btrfs_run_delayed_refs+0x11c/0x460 [ 50.285778][ T5167] btrfs_commit_transaction+0x1d8/0x30ac [ 50.286721][ T5167] btrfs_sync_fs+0x240/0xb2c [ 50.287454][ T5167] sync_filesystem+0x1a0/0x218 [ 50.288192][ T5167] btrfs_remount+0x190/0x12ac [ 50.288951][ T5167] legacy_reconfigure+0xfc/0x114 [ 50.289810][ T5167] reconfigure_super+0x1d0/0x6c4 [ 50.290652][ T5167] path_mount+0xd20/0xfe8 [ 50.291427][ T5167] __arm64_sys_mount+0x488/0x5f8 [ 50.292217][ T5167] invoke_syscall+0x98/0x28c [ 50.292946][ T5167] el0_svc_common+0x13c/0x258 [ 50.293704][ T5167] do_el0_svc+0x5c/0x140 [ 50.294400][ T5167] el0_svc+0x78/0x1d0 [ 50.295065][ T5167] el0t_64_sync_handler+0xcc/0xe4 [ 50.295876][ T5167] el0t_64_sync+0x1a0/0x1a4 [ 50.297444][ T5167] BTRFS error (device loop0): failed to run delayed ref for logical 5251072 num_bytes 4096 type 176 action 1 ref_mod 1: -12 [ 50.299782][ T5167] ------------[ cut here ]------------ [ 50.300744][ T5167] WARNING: CPU: 0 PID: 5167 at fs/btrfs/extent-tree.c:2173 btrfs_run_delayed_refs+0x3e8/0x460 [ 50.302405][ T5167] Modules linked in: [ 50.303020][ T5167] CPU: 0 PID: 5167 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 50.304458][ T5167] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 50.306115][ T5167] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 50.307398][ T5167] pc : btrfs_run_delayed_refs+0x3e8/0x460 [ 50.308385][ T5167] lr : btrfs_run_delayed_refs+0x3e8/0x460 [ 50.309377][ T5167] sp : ffff800022277570 [ 50.310107][ T5167] x29: ffff800022277580 x28: ffff0000de6f2000 x27: dfff800000000000 [ 50.311502][ T5167] x26: dfff800000000000 x25: ffff0000dedf3dc0 x24: 1fffe0001bdbe7c3 [ 50.312899][ T5167] x23: ffff0000dedf3e18 x22: 00000000fffffff4 x21: 0000000000000000 [ 50.314252][ T5167] x20: 00000000fffffff4 x19: ffff0000dedf3dc0 x18: 0000000000000000 [ 50.315599][ T5167] x17: 0000000000000000 x16: ffff80001134e478 x15: 0000000000000000 [ 50.316961][ T5167] x14: 0000000000000001 x13: 1fffe000341cebab x12: 0000000000000000 [ 50.318307][ T5167] x11: ff8080000830061c x10: 0000000000000000 x9 : b13592d4f7476300 [ 50.319715][ T5167] x8 : b13592d4f7476300 x7 : 0000000000000001 x6 : 0000000000000001 [ 50.321066][ T5167] x5 : ffff800022276e78 x4 : ffff80001446f500 x3 : ffff80000850f688 [ 50.322431][ T5167] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 50.323795][ T5167] Call trace: [ 50.324354][ T5167] btrfs_run_delayed_refs+0x3e8/0x460 [ 50.325259][ T5167] btrfs_commit_transaction+0x1d8/0x30ac [ 50.326210][ T5167] btrfs_sync_fs+0x240/0xb2c [ 50.326982][ T5167] sync_filesystem+0x1a0/0x218 [ 50.327794][ T5167] btrfs_remount+0x190/0x12ac [ 50.328582][ T5167] legacy_reconfigure+0xfc/0x114 [ 50.329343][ T5167] reconfigure_super+0x1d0/0x6c4 [ 50.330184][ T5167] path_mount+0xd20/0xfe8 [ 50.330924][ T5167] __arm64_sys_mount+0x488/0x5f8 [ 50.331783][ T5167] invoke_syscall+0x98/0x28c [ 50.332571][ T5167] el0_svc_common+0x13c/0x258 [ 50.333367][ T5167] do_el0_svc+0x5c/0x140 [ 50.334049][ T5167] el0_svc+0x78/0x1d0 [ 50.334686][ T5167] el0t_64_sync_handler+0xcc/0xe4 [ 50.335514][ T5167] el0t_64_sync+0x1a0/0x1a4 [ 50.336299][ T5167] irq event stamp: 79362 [ 50.337000][ T5167] hardirqs last enabled at (79361): [] __up_console_sem+0xb4/0xfc [ 50.338604][ T5167] hardirqs last disabled at (79362): [] el1_dbg+0x24/0x80 [ 50.340158][ T5167] softirqs last enabled at (79340): [] handle_softirqs+0xa70/0xc14 [ 50.341862][ T5167] softirqs last disabled at (79313): [] __irq_exit_rcu+0x240/0x434 [ 50.343510][ T5167] ---[ end trace 811c90d7563d9f83 ]--- [ 50.345151][ T5167] BTRFS: error (device loop0) in btrfs_run_delayed_refs:2173: errno=-12 Out of memory [ 50.346706][ T5167] BTRFS error (device loop0): Remounting read-write after error is not allowed 1970/01/01 00:00:50 executed programs: 33 [ 50.515030][ T5188] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5188) [ 50.530021][ T5188] FAULT_INJECTION: forcing a failure. [ 50.530021][ T5188] name failslab, interval 1, probability 0, space 0, times 0 [ 50.532187][ T5188] CPU: 0 PID: 5188 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 50.533651][ T5188] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 50.535535][ T5188] Call trace: [ 50.536137][ T5188] dump_backtrace+0x0/0x458 [ 50.536941][ T5188] show_stack+0x2c/0x3c [ 50.537614][ T5188] __dump_stack+0x30/0x40 [ 50.538380][ T5188] dump_stack_lvl+0xf4/0x15c [ 50.539218][ T5188] dump_stack+0x1c/0x5c [ 50.539897][ T5188] should_fail+0x3c8/0x520 [ 50.540649][ T5188] __should_failslab+0xbc/0x10c [ 50.541446][ T5188] should_failslab+0x10/0x28 [ 50.542230][ T5188] slab_pre_alloc_hook+0x64/0xe8 [ 50.543064][ T5188] kmem_cache_alloc+0x94/0x3d8 [ 50.543899][ T5188] alloc_extent_state+0x38/0x434 [ 50.544764][ T5188] set_extent_bit+0x1ac/0x13a8 [ 50.545618][ T5188] btrfs_alloc_tree_block+0x930/0x10f0 [ 50.546519][ T5188] btrfs_force_cow_block+0x3ac/0x172c [ 50.547419][ T5188] btrfs_cow_block+0x2d4/0x674 [ 50.548257][ T5188] btrfs_search_slot+0xa10/0x1ec8 [ 50.549244][ T5188] lookup_inline_extent_backref+0x284/0xd4c [ 50.550436][ T5188] __btrfs_free_extent+0x21c/0x1ae0 [ 50.551498][ T5188] __btrfs_run_delayed_refs+0xc00/0x3484 [ 50.552514][ T5188] btrfs_run_delayed_refs+0x11c/0x460 [ 50.553431][ T5188] btrfs_commit_transaction+0x1d8/0x30ac [ 50.554333][ T5188] btrfs_sync_fs+0x240/0xb2c [ 50.555176][ T5188] sync_filesystem+0x1a0/0x218 [ 50.556014][ T5188] btrfs_remount+0x190/0x12ac [ 50.556790][ T5188] legacy_reconfigure+0xfc/0x114 [ 50.557633][ T5188] reconfigure_super+0x1d0/0x6c4 [ 50.558470][ T5188] path_mount+0xd20/0xfe8 [ 50.559354][ T5188] __arm64_sys_mount+0x488/0x5f8 [ 50.560366][ T5188] invoke_syscall+0x98/0x28c [ 50.561253][ T5188] el0_svc_common+0x13c/0x258 [ 50.562094][ T5188] do_el0_svc+0x5c/0x140 [ 50.562758][ T5188] el0_svc+0x78/0x1d0 [ 50.563395][ T5188] el0t_64_sync_handler+0xcc/0xe4 [ 50.564225][ T5188] el0t_64_sync+0x1a0/0x1a4 [ 50.734900][ T5209] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5209) [ 50.760766][ T5209] FAULT_INJECTION: forcing a failure. [ 50.760766][ T5209] name failslab, interval 1, probability 0, space 0, times 0 [ 50.762898][ T5209] CPU: 0 PID: 5209 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 50.764420][ T5209] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 50.766127][ T5209] Call trace: [ 50.766702][ T5209] dump_backtrace+0x0/0x458 [ 50.767487][ T5209] show_stack+0x2c/0x3c [ 50.768260][ T5209] __dump_stack+0x30/0x40 [ 50.769054][ T5209] dump_stack_lvl+0xf4/0x15c [ 50.769898][ T5209] dump_stack+0x1c/0x5c [ 50.770753][ T5209] should_fail+0x3c8/0x520 [ 50.771644][ T5209] __should_failslab+0xbc/0x10c [ 50.772584][ T5209] should_failslab+0x10/0x28 [ 50.773387][ T5209] slab_pre_alloc_hook+0x64/0xe8 [ 50.774273][ T5209] kmem_cache_alloc+0x94/0x3d8 [ 50.775169][ T5209] alloc_extent_state+0x38/0x434 [ 50.776170][ T5209] set_extent_bit+0x1ac/0x13a8 [ 50.777123][ T5209] btrfs_alloc_tree_block+0x930/0x10f0 [ 50.778224][ T5209] btrfs_force_cow_block+0x3ac/0x172c [ 50.779332][ T5209] btrfs_cow_block+0x2d4/0x674 [ 50.780214][ T5209] btrfs_search_slot+0xa10/0x1ec8 [ 50.781058][ T5209] btrfs_insert_empty_items+0x1e8/0x2b0 [ 50.781990][ T5209] __btrfs_run_delayed_refs+0xb84/0x3484 [ 50.782925][ T5209] btrfs_run_delayed_refs+0x11c/0x460 [ 50.783836][ T5209] btrfs_commit_transaction+0x1d8/0x30ac [ 50.784768][ T5209] btrfs_sync_fs+0x240/0xb2c [ 50.785496][ T5209] sync_filesystem+0x1a0/0x218 [ 50.786249][ T5209] btrfs_remount+0x190/0x12ac [ 50.786971][ T5209] legacy_reconfigure+0xfc/0x114 [ 50.787748][ T5209] reconfigure_super+0x1d0/0x6c4 [ 50.788551][ T5209] path_mount+0xd20/0xfe8 [ 50.789245][ T5209] __arm64_sys_mount+0x488/0x5f8 [ 50.790033][ T5209] invoke_syscall+0x98/0x28c [ 50.790778][ T5209] el0_svc_common+0x13c/0x258 [ 50.791543][ T5209] do_el0_svc+0x5c/0x140 [ 50.792233][ T5209] el0_svc+0x78/0x1d0 [ 50.792890][ T5209] el0t_64_sync_handler+0xcc/0xe4 [ 50.793687][ T5209] el0t_64_sync+0x1a0/0x1a4 [ 50.990107][ T5230] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5230) [ 51.005253][ T5230] FAULT_INJECTION: forcing a failure. [ 51.005253][ T5230] name failslab, interval 1, probability 0, space 0, times 0 [ 51.007388][ T5230] CPU: 0 PID: 5230 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 51.009082][ T5230] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 51.010912][ T5230] Call trace: [ 51.011527][ T5230] dump_backtrace+0x0/0x458 [ 51.012322][ T5230] show_stack+0x2c/0x3c [ 51.013022][ T5230] __dump_stack+0x30/0x40 [ 51.013743][ T5230] dump_stack_lvl+0xf4/0x15c [ 51.014493][ T5230] dump_stack+0x1c/0x5c [ 51.015169][ T5230] should_fail+0x3c8/0x520 [ 51.015892][ T5230] __should_failslab+0xbc/0x10c [ 51.016723][ T5230] should_failslab+0x10/0x28 [ 51.017520][ T5230] slab_pre_alloc_hook+0x64/0xe8 [ 51.018345][ T5230] kmem_cache_alloc+0x94/0x3d8 [ 51.019147][ T5230] start_transaction+0x530/0x1438 [ 51.019983][ T5230] btrfs_attach_transaction_barrier+0x30/0xac [ 51.020950][ T5230] btrfs_sync_fs+0x13c/0xb2c [ 51.021709][ T5230] sync_filesystem+0x1a0/0x218 [ 51.022494][ T5230] btrfs_remount+0x190/0x12ac [ 51.023271][ T5230] legacy_reconfigure+0xfc/0x114 [ 51.024127][ T5230] reconfigure_super+0x1d0/0x6c4 [ 51.024915][ T5230] path_mount+0xd20/0xfe8 [ 51.025608][ T5230] __arm64_sys_mount+0x488/0x5f8 [ 51.026434][ T5230] invoke_syscall+0x98/0x28c [ 51.027303][ T5230] el0_svc_common+0x13c/0x258 [ 51.028063][ T5230] do_el0_svc+0x5c/0x140 [ 51.028767][ T5230] el0_svc+0x78/0x1d0 [ 51.029441][ T5230] el0t_64_sync_handler+0xcc/0xe4 [ 51.030272][ T5230] el0t_64_sync+0x1a0/0x1a4 [ 51.169271][ T5251] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5251) [ 51.187229][ T5251] FAULT_INJECTION: forcing a failure. [ 51.187229][ T5251] name failslab, interval 1, probability 0, space 0, times 0 [ 51.190292][ T5251] CPU: 0 PID: 5251 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 51.191702][ T5251] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 51.193393][ T5251] Call trace: [ 51.193885][ T5251] dump_backtrace+0x0/0x458 [ 51.194605][ T5251] show_stack+0x2c/0x3c [ 51.195273][ T5251] __dump_stack+0x30/0x40 [ 51.196010][ T5251] dump_stack_lvl+0xf4/0x15c [ 51.196795][ T5251] dump_stack+0x1c/0x5c [ 51.197508][ T5251] should_fail+0x3c8/0x520 [ 51.198278][ T5251] __should_failslab+0xbc/0x10c [ 51.199133][ T5251] should_failslab+0x10/0x28 [ 51.199913][ T5251] slab_pre_alloc_hook+0x64/0xe8 [ 51.200734][ T5251] kmem_cache_alloc+0x94/0x3d8 [ 51.201516][ T5251] alloc_extent_state+0x38/0x434 [ 51.202401][ T5251] set_extent_bit+0x1ac/0x13a8 [ 51.203174][ T5251] btrfs_alloc_tree_block+0x930/0x10f0 [ 51.204031][ T5251] btrfs_force_cow_block+0x3ac/0x172c [ 51.204918][ T5251] btrfs_cow_block+0x2d4/0x674 [ 51.205677][ T5251] btrfs_search_slot+0xa10/0x1ec8 [ 51.206487][ T5251] btrfs_insert_empty_items+0x1e8/0x2b0 [ 51.207431][ T5251] __btrfs_run_delayed_refs+0xb84/0x3484 [ 51.208410][ T5251] btrfs_run_delayed_refs+0x11c/0x460 [ 51.209311][ T5251] btrfs_commit_transaction+0x1d8/0x30ac [ 51.210272][ T5251] btrfs_sync_fs+0x240/0xb2c [ 51.211033][ T5251] sync_filesystem+0x1a0/0x218 [ 51.211865][ T5251] btrfs_remount+0x190/0x12ac [ 51.212690][ T5251] legacy_reconfigure+0xfc/0x114 [ 51.213503][ T5251] reconfigure_super+0x1d0/0x6c4 [ 51.214320][ T5251] path_mount+0xd20/0xfe8 [ 51.215015][ T5251] __arm64_sys_mount+0x488/0x5f8 [ 51.215844][ T5251] invoke_syscall+0x98/0x28c [ 51.216614][ T5251] el0_svc_common+0x13c/0x258 [ 51.217393][ T5251] do_el0_svc+0x5c/0x140 [ 51.218076][ T5251] el0_svc+0x78/0x1d0 [ 51.218766][ T5251] el0t_64_sync_handler+0xcc/0xe4 [ 51.219612][ T5251] el0t_64_sync+0x1a0/0x1a4 [ 51.416433][ T5272] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5272) [ 51.441608][ T5272] FAULT_INJECTION: forcing a failure. [ 51.441608][ T5272] name failslab, interval 1, probability 0, space 0, times 0 [ 51.443637][ T5272] CPU: 0 PID: 5272 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 51.445208][ T5272] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 51.447045][ T5272] Call trace: [ 51.447582][ T5272] dump_backtrace+0x0/0x458 [ 51.448334][ T5272] show_stack+0x2c/0x3c [ 51.449057][ T5272] __dump_stack+0x30/0x40 [ 51.449773][ T5272] dump_stack_lvl+0xf4/0x15c [ 51.450546][ T5272] dump_stack+0x1c/0x5c [ 51.451239][ T5272] should_fail+0x3c8/0x520 [ 51.451985][ T5272] __should_failslab+0xbc/0x10c [ 51.452784][ T5272] should_failslab+0x10/0x28 [ 51.453567][ T5272] slab_pre_alloc_hook+0x64/0xe8 [ 51.454411][ T5272] kmem_cache_alloc+0x94/0x3d8 [ 51.455223][ T5272] start_transaction+0x530/0x1438 [ 51.456078][ T5272] btrfs_attach_transaction_barrier+0x30/0xac [ 51.457084][ T5272] btrfs_sync_fs+0x13c/0xb2c [ 51.457859][ T5272] sync_filesystem+0x1a0/0x218 [ 51.458670][ T5272] btrfs_remount+0x190/0x12ac [ 51.459438][ T5272] legacy_reconfigure+0xfc/0x114 [ 51.460269][ T5272] reconfigure_super+0x1d0/0x6c4 [ 51.461091][ T5272] path_mount+0xd20/0xfe8 [ 51.461832][ T5272] __arm64_sys_mount+0x488/0x5f8 [ 51.462674][ T5272] invoke_syscall+0x98/0x28c [ 51.463442][ T5272] el0_svc_common+0x13c/0x258 [ 51.464179][ T5272] do_el0_svc+0x5c/0x140 [ 51.464854][ T5272] el0_svc+0x78/0x1d0 [ 51.465526][ T5272] el0t_64_sync_handler+0xcc/0xe4 [ 51.466449][ T5272] el0t_64_sync+0x1a0/0x1a4 [ 51.607597][ T5293] BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5293) [ 51.624102][ T5293] FAULT_INJECTION: forcing a failure. [ 51.624102][ T5293] name failslab, interval 1, probability 0, space 0, times 0 [ 51.626328][ T5293] CPU: 0 PID: 5293 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 51.627853][ T5293] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 51.629543][ T5293] Call trace: [ 51.630145][ T5293] dump_backtrace+0x0/0x458 [ 51.630899][ T5293] show_stack+0x2c/0x3c [ 51.631592][ T5293] __dump_stack+0x30/0x40 [ 51.632326][ T5293] dump_stack_lvl+0xf4/0x15c [ 51.633116][ T5293] dump_stack+0x1c/0x5c [ 51.633793][ T5293] should_fail+0x3c8/0x520 [ 51.634488][ T5293] __should_failslab+0xbc/0x10c [ 51.635299][ T5293] should_failslab+0x10/0x28 [ 51.636051][ T5293] slab_pre_alloc_hook+0x64/0xe8 [ 51.636859][ T5293] kmem_cache_alloc+0x94/0x3d8 [ 51.637757][ T5293] start_transaction+0x530/0x1438 [ 51.638571][ T5293] btrfs_attach_transaction_barrier+0x30/0xac [ 51.639638][ T5293] btrfs_sync_fs+0x13c/0xb2c [ 51.640480][ T5293] sync_filesystem+0x1a0/0x218 [ 51.641262][ T5293] btrfs_remount+0x190/0x12ac [ 51.642099][ T5293] legacy_reconfigure+0xfc/0x114 [ 51.642930][ T5293] reconfigure_super+0x1d0/0x6c4 [ 51.643726][ T5293] path_mount+0xd20/0xfe8 [ 51.644443][ T5293] __arm64_sys_mount+0x488/0x5f8 [ 51.645280][ T5293] invoke_syscall+0x98/0x28c [ 51.646059][ T5293] el0_svc_common+0x13c/0x258 [ 51.646882][ T5293] do_el0_svc+0x5c/0x140 [ 51.647577][ T5293] el0_svc+0x78/0x1d0 [ 51.648260][ T5293] el0t_64_sync_handler+0xcc/0xe4 [ 51.649128][ T5293] el0t_64_sync+0x1a0/0x1a4