[ 35.839726][ T1604] netdevsim netdevsim0 netdevsim3 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 37.888162][ T1604] netdevsim netdevsim0 netdevsim2 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 37.938060][ T1604] netdevsim netdevsim0 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 37.979235][ T1604] netdevsim netdevsim0 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0 [ 39.197974][ T1604] device hsr_slave_0 left promiscuous mode [ 39.234491][ T1604] device hsr_slave_1 left promiscuous mode [ 39.334666][ T1604] batman_adv: batadv0: Interface deactivated: batadv_slave_0 [ 39.336018][ T1604] batman_adv: batadv0: Removing interface: batadv_slave_0 [ 39.338703][ T1604] batman_adv: batadv0: Interface deactivated: batadv_slave_1 [ 39.339907][ T1604] batman_adv: batadv0: Removing interface: batadv_slave_1 [ 39.341340][ T1604] device bridge_slave_1 left promiscuous mode [ 39.342662][ T1604] bridge0: port 2(bridge_slave_1) entered disabled state [ 39.405678][ T1604] device bridge_slave_0 left promiscuous mode [ 39.406810][ T1604] bridge0: port 1(bridge_slave_0) entered disabled state [ 39.524467][ T1604] device veth1_macvtap left promiscuous mode [ 39.525629][ T1604] device veth0_macvtap left promiscuous mode [ 39.526671][ T1604] device veth1_vlan left promiscuous mode [ 39.527772][ T1604] device veth0_vlan left promiscuous mode [ 39.633129][ T1604] team0 (unregistering): Port device team_slave_1 removed [ 39.642188][ T1604] team0 (unregistering): Port device team_slave_0 removed [ 39.647188][ T1604] bond0 (unregistering): (slave bond_slave_1): Releasing backup interface [ 39.678493][ T1604] bond0 (unregistering): (slave bond_slave_0): Releasing backup interface [ 39.789987][ T1604] bond0 (unregistering): Released all slaves Warning: Permanently added '10.128.10.11' (ED25519) to the list of known hosts. 1970/01/01 00:00:40 ignoring optional flag "type"="gce" 1970/01/01 00:00:40 parsed 1 programs [ 40.546502][ T4250] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k SSFS 1970/01/01 00:00:40 executed programs: 0 [ 40.622005][ T4258] chnl_net:caif_netlink_parms(): no params data found [ 40.640821][ T4258] bridge0: port 1(bridge_slave_0) entered blocking state [ 40.642117][ T4258] bridge0: port 1(bridge_slave_0) entered disabled state [ 40.643823][ T4258] device bridge_slave_0 entered promiscuous mode [ 40.646763][ T4258] bridge0: port 2(bridge_slave_1) entered blocking state [ 40.647991][ T4258] bridge0: port 2(bridge_slave_1) entered disabled state [ 40.649534][ T4258] device bridge_slave_1 entered promiscuous mode [ 40.658951][ T4258] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 40.661499][ T4258] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 40.671213][ T4258] team0: Port device team_slave_0 added [ 40.673113][ T4258] team0: Port device team_slave_1 added [ 40.681028][ T4258] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 40.682155][ T4258] 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. [ 40.687221][ T4258] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 40.689515][ T4258] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 40.690613][ T4258] 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. [ 40.695023][ T4258] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 40.766674][ T4258] device hsr_slave_0 entered promiscuous mode [ 40.804511][ T4258] device hsr_slave_1 entered promiscuous mode [ 41.414989][ T4258] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 41.436062][ T4258] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 41.485569][ T4258] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 41.515621][ T4258] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 41.570810][ T4258] 8021q: adding VLAN 0 to HW filter on device bond0 [ 41.575028][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready [ 41.576660][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 41.579338][ T4258] 8021q: adding VLAN 0 to HW filter on device team0 [ 41.582326][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bridge: link becomes ready [ 41.584164][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 41.586182][ T1604] bridge0: port 1(bridge_slave_0) entered blocking state [ 41.587356][ T1604] bridge0: port 1(bridge_slave_0) entered forwarding state [ 41.589066][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): bridge0: link becomes ready [ 41.602464][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bridge: link becomes ready [ 41.604870][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 41.606432][ T355] bridge0: port 2(bridge_slave_1) entered blocking state [ 41.607638][ T355] bridge0: port 2(bridge_slave_1) entered forwarding state [ 41.609094][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_bond: link becomes ready [ 41.610982][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_bond: link becomes ready [ 41.612741][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_team: link becomes ready [ 41.616878][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 41.618694][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_team: link becomes ready [ 41.620369][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 41.622118][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_hsr: link becomes ready [ 41.623741][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 41.626318][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_hsr: link becomes ready [ 41.627898][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 41.631321][ T4258] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 41.635655][ T355] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 41.677003][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 41.678419][ T136] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 41.682243][ T4258] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 41.689692][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 41.691431][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 41.698536][ T4258] device veth0_vlan entered promiscuous mode [ 41.701873][ T4258] device veth1_vlan entered promiscuous mode [ 41.705261][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 41.707094][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 41.710221][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 41.714825][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 41.716443][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 41.717944][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 41.723925][ T4258] device veth0_macvtap entered promiscuous mode [ 41.727980][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 41.729677][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 41.731933][ T4258] device veth1_macvtap entered promiscuous mode [ 41.734516][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 41.736783][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 41.742003][ T4258] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 41.748502][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 41.750250][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 41.752555][ T4258] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 41.756191][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 41.757853][ T1604] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 41.759918][ T4258] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 41.761388][ T4258] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 41.762809][ T4258] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 41.766046][ T4258] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 41.913182][ T4371] loop0: detected capacity change from 0 to 32768 [ 41.922720][ T4371] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4371) [ 41.934792][ T4371] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 41.936599][ T4371] BTRFS info (device loop0): setting nodatacow, compression disabled [ 41.938285][ T4371] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 41.940212][ T4371] BTRFS info (device loop0): trying to use backup root at mount time [ 41.941782][ T4371] BTRFS info (device loop0): metadata ratio 1564 [ 41.942933][ T4371] BTRFS info (device loop0): doing ref verification [ 41.944188][ T4371] BTRFS info (device loop0): force zlib compression, level 3 [ 41.946233][ T4371] BTRFS info (device loop0): turning on flush-on-commit [ 41.947576][ T4371] BTRFS info (device loop0): using free space tree [ 41.948896][ T4371] BTRFS info (device loop0): has skinny extents [ 42.012544][ T4371] BTRFS info (device loop0): enabling ssd optimizations [ 42.023718][ T4371] FAULT_INJECTION: forcing a failure. [ 42.023718][ T4371] name failslab, interval 1, probability 0, space 0, times 1 [ 42.031395][ T4371] CPU: 1 PID: 4371 Comm: syz-executor.0 Not tainted syzkaller #0 [ 42.032705][ T4371] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 42.034266][ T4371] Call trace: [ 42.034818][ T4371] dump_backtrace+0x0/0x458 [ 42.035644][ T4371] show_stack+0x2c/0x3c [ 42.036355][ T4371] __dump_stack+0x30/0x40 [ 42.037079][ T4371] dump_stack_lvl+0xf4/0x15c [ 42.037838][ T4371] dump_stack+0x1c/0x5c [ 42.038538][ T4371] should_fail+0x3c8/0x520 [ 42.039317][ T4371] __should_failslab+0xbc/0x10c [ 42.040146][ T4371] should_failslab+0x10/0x28 [ 42.040944][ T4371] slab_pre_alloc_hook+0x64/0xe8 [ 42.041833][ T4371] kmem_cache_alloc+0x94/0x3d8 [ 42.042672][ T4371] btrfs_insert_item+0xd0/0x2bc [ 42.043539][ T4371] btrfs_insert_root+0xa4/0x14c [ 42.044453][ T4371] btrfs_sync_log+0xb14/0x1e7c [ 42.045285][ T4371] btrfs_sync_file+0xa2c/0xf2c [ 42.046098][ T4371] vfs_fsync_range+0x168/0x188 [ 42.046929][ T4371] btrfs_file_write_iter+0xa58/0xc18 [ 42.047830][ T4371] vfs_write+0x590/0xa64 [ 42.048601][ T4371] ksys_write+0x12c/0x228 [ 42.049340][ T4371] __arm64_sys_write+0x7c/0x90 [ 42.050159][ T4371] invoke_syscall+0x98/0x28c [ 42.050922][ T4371] el0_svc_common+0x13c/0x258 [ 42.051680][ T4371] do_el0_svc+0x5c/0x140 [ 42.052410][ T4371] el0_svc+0x78/0x1d0 [ 42.053074][ T4371] el0t_64_sync_handler+0xcc/0xe4 [ 42.053914][ T4371] el0t_64_sync+0x1a0/0x1a4 [ 42.058060][ T4371] ------------[ cut here ]------------ [ 42.059215][ T4371] WARNING: CPU: 1 PID: 4371 at fs/btrfs/tree-log.c:3224 btrfs_sync_log+0x13d4/0x1e7c [ 42.060678][ T4371] Modules linked in: [ 42.061259][ T4371] CPU: 1 PID: 4371 Comm: syz-executor.0 Not tainted syzkaller #0 [ 42.062670][ T4371] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 42.064368][ T4371] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 42.065770][ T4371] pc : btrfs_sync_log+0x13d4/0x1e7c [ 42.066600][ T4371] lr : btrfs_sync_log+0x13d4/0x1e7c [ 42.067509][ T4371] sp : ffff80001f867400 [ 42.068203][ T4371] x29: ffff80001f867800 x28: 00000000fffffff4 x27: dfff800000000000 [ 42.069643][ T4371] x26: ffff80001f8674c0 x25: ffff0000ded3d160 x24: 1fffe0001837349d [ 42.070988][ T4371] x23: ffff0000d9c9c4e0 x22: ffff0000c1b9c000 x21: ffff80001f867748 [ 42.072435][ T4371] x20: ffff0000de70e000 x19: ffff0000ded3d1b8 x18: 0000000000000000 [ 42.073862][ T4371] x17: 0000000000000000 x16: ffff80001135f958 x15: 0000000000000000 [ 42.075256][ T4371] x14: 0000000000000001 x13: 1fffe000341d09ab x12: 0000000000000000 [ 42.076611][ T4371] x11: ff80800008300a38 x10: 0000000000000000 x9 : dfbf1f8a37510300 [ 42.078038][ T4371] x8 : dfbf1f8a37510300 x7 : 0000000000000001 x6 : 0000000000000001 [ 42.079429][ T4371] x5 : ffff80001f866d18 x4 : ffff80001447f520 x3 : ffff80000850fcd0 [ 42.080831][ T4371] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 42.082193][ T4371] Call trace: [ 42.082763][ T4371] btrfs_sync_log+0x13d4/0x1e7c [ 42.083605][ T4371] btrfs_sync_file+0xa2c/0xf2c [ 42.084430][ T4371] vfs_fsync_range+0x168/0x188 [ 42.085226][ T4371] btrfs_file_write_iter+0xa58/0xc18 [ 42.086150][ T4371] vfs_write+0x590/0xa64 [ 42.086877][ T4371] ksys_write+0x12c/0x228 [ 42.087621][ T4371] __arm64_sys_write+0x7c/0x90 [ 42.088439][ T4371] invoke_syscall+0x98/0x28c [ 42.089252][ T4371] el0_svc_common+0x13c/0x258 [ 42.090059][ T4371] do_el0_svc+0x5c/0x140 [ 42.090830][ T4371] el0_svc+0x78/0x1d0 [ 42.091525][ T4371] el0t_64_sync_handler+0xcc/0xe4 [ 42.092359][ T4371] el0t_64_sync+0x1a0/0x1a4 [ 42.093144][ T4371] irq event stamp: 83168 [ 42.093822][ T4371] hardirqs last enabled at (83167): [] __up_console_sem+0xb4/0xfc [ 42.095419][ T4371] hardirqs last disabled at (83168): [] el1_dbg+0x24/0x80 [ 42.096910][ T4371] softirqs last enabled at (83134): [] handle_softirqs+0xa70/0xc14 [ 42.098538][ T4371] softirqs last disabled at (83017): [] __irq_exit_rcu+0x240/0x434 [ 42.100120][ T4371] ---[ end trace 84f9bdcceacb1671 ]--- [ 42.106653][ T4371] BTRFS: error (device loop0) in btrfs_sync_log:3224: errno=-12 Out of memory [ 42.111097][ T4371] BTRFS info (device loop0): forced readonly [ 42.319185][ T4441] loop0: detected capacity change from 0 to 32768 [ 42.322148][ T4441] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4441) [ 42.328210][ T4441] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 42.329981][ T4441] BTRFS info (device loop0): setting nodatacow, compression disabled [ 42.331458][ T4441] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 42.333435][ T4441] BTRFS info (device loop0): trying to use backup root at mount time [ 42.336162][ T4441] BTRFS info (device loop0): metadata ratio 1564 [ 42.337265][ T4441] BTRFS info (device loop0): doing ref verification [ 42.338399][ T4441] BTRFS info (device loop0): force zlib compression, level 3 [ 42.339587][ T4441] BTRFS info (device loop0): turning on flush-on-commit [ 42.340746][ T4441] BTRFS info (device loop0): using free space tree [ 42.341815][ T4441] BTRFS info (device loop0): has skinny extents [ 42.410858][ T4441] BTRFS info (device loop0): enabling ssd optimizations [ 42.418469][ T4441] FAULT_INJECTION: forcing a failure. [ 42.418469][ T4441] name fail_page_alloc, interval 1, probability 0, space 0, times 1 [ 42.421250][ T4441] CPU: 0 PID: 4441 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 42.422797][ T4441] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 42.424834][ T4441] Call trace: [ 42.425410][ T4441] dump_backtrace+0x0/0x458 [ 42.426190][ T4441] show_stack+0x2c/0x3c [ 42.426940][ T4441] __dump_stack+0x30/0x40 [ 42.427661][ T4441] dump_stack_lvl+0xf4/0x15c [ 42.428469][ T4441] dump_stack+0x1c/0x5c [ 42.429212][ T4441] should_fail+0x3c8/0x520 [ 42.429995][ T4441] should_fail_alloc_page+0x74/0xa8 [ 42.431015][ T4441] prepare_alloc_pages+0x160/0x460 [ 42.431879][ T4441] __alloc_pages+0x108/0x474 [ 42.432645][ T4441] alloc_pages+0x34c/0x5c0 [ 42.433337][ T4441] new_slab+0xdc/0x53c [ 42.434000][ T4441] ___slab_alloc+0x6ac/0xd84 [ 42.434773][ T4441] __slab_alloc+0x68/0xc0 [ 42.435518][ T4441] kmem_cache_alloc+0x2a8/0x3d8 [ 42.436552][ T4441] alloc_extent_state+0x38/0x434 [ 42.437417][ T4441] convert_extent_bit+0x188/0x171c [ 42.438294][ T4441] btrfs_write_marked_extents+0x17c/0x368 [ 42.439310][ T4441] btrfs_sync_log+0x1290/0x1e7c [ 42.440176][ T4441] btrfs_sync_file+0xa2c/0xf2c [ 42.440999][ T4441] vfs_fsync_range+0x168/0x188 [ 42.441819][ T4441] btrfs_file_write_iter+0xa58/0xc18 [ 42.442717][ T4441] vfs_write+0x590/0xa64 [ 42.443495][ T4441] ksys_write+0x12c/0x228 [ 42.444235][ T4441] __arm64_sys_write+0x7c/0x90 [ 42.445060][ T4441] invoke_syscall+0x98/0x28c [ 42.445817][ T4441] el0_svc_common+0x13c/0x258 [ 42.446601][ T4441] do_el0_svc+0x5c/0x140 [ 42.447295][ T4441] el0_svc+0x78/0x1d0 [ 42.447994][ T4441] el0t_64_sync_handler+0xcc/0xe4 [ 42.448805][ T4441] el0t_64_sync+0x1a0/0x1a4 [ 42.584979][ T4423] Bluetooth: hci0: command 0x0409 tx timeout [ 42.703806][ T4513] loop0: detected capacity change from 0 to 32768 [ 42.714739][ T4513] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4513) [ 42.725387][ T4513] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 42.727953][ T4513] BTRFS info (device loop0): setting nodatacow, compression disabled [ 42.731652][ T4513] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 42.741055][ T4513] BTRFS info (device loop0): trying to use backup root at mount time [ 42.742628][ T4513] BTRFS info (device loop0): metadata ratio 1564 [ 42.743726][ T4513] BTRFS info (device loop0): doing ref verification [ 42.746195][ T4513] BTRFS info (device loop0): force zlib compression, level 3 [ 42.747561][ T4513] BTRFS info (device loop0): turning on flush-on-commit [ 42.748767][ T4513] BTRFS info (device loop0): using free space tree [ 42.749902][ T4513] BTRFS info (device loop0): has skinny extents [ 42.799292][ T4513] BTRFS info (device loop0): enabling ssd optimizations [ 42.812761][ T4513] FAULT_INJECTION: forcing a failure. [ 42.812761][ T4513] name failslab, interval 1, probability 0, space 0, times 0 [ 42.815508][ T4513] CPU: 0 PID: 4513 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 42.817053][ T4513] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 42.818724][ T4513] Call trace: [ 42.819274][ T4513] dump_backtrace+0x0/0x458 [ 42.820014][ T4513] show_stack+0x2c/0x3c [ 42.820725][ T4513] __dump_stack+0x30/0x40 [ 42.821432][ T4513] dump_stack_lvl+0xf4/0x15c [ 42.822214][ T4513] dump_stack+0x1c/0x5c [ 42.822878][ T4513] should_fail+0x3c8/0x520 [ 42.823628][ T4513] __should_failslab+0xbc/0x10c [ 42.824460][ T4513] should_failslab+0x10/0x28 [ 42.825275][ T4513] slab_pre_alloc_hook+0x64/0xe8 [ 42.826172][ T4513] kmem_cache_alloc+0x94/0x3d8 [ 42.827039][ T4513] alloc_extent_state+0x38/0x434 [ 42.828000][ T4513] convert_extent_bit+0x188/0x171c [ 42.828827][ T4513] btrfs_write_marked_extents+0x17c/0x368 [ 42.829924][ T4513] btrfs_sync_log+0x1290/0x1e7c [ 42.830723][ T4513] btrfs_sync_file+0xa2c/0xf2c [ 42.831498][ T4513] vfs_fsync_range+0x168/0x188 [ 42.832250][ T4513] btrfs_file_write_iter+0xa58/0xc18 [ 42.833268][ T4513] vfs_write+0x590/0xa64 [ 42.833994][ T4513] ksys_write+0x12c/0x228 [ 42.834722][ T4513] __arm64_sys_write+0x7c/0x90 [ 42.835641][ T4513] invoke_syscall+0x98/0x28c [ 42.836437][ T4513] el0_svc_common+0x13c/0x258 [ 42.837208][ T4513] do_el0_svc+0x5c/0x140 [ 42.837992][ T4513] el0_svc+0x78/0x1d0 [ 42.838722][ T4513] el0t_64_sync_handler+0xcc/0xe4 [ 42.839662][ T4513] el0t_64_sync+0x1a0/0x1a4 [ 43.087119][ T4574] loop0: detected capacity change from 0 to 32768 [ 43.095027][ T4574] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4574) [ 43.102461][ T4574] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 43.103991][ T4574] BTRFS info (device loop0): setting nodatacow, compression disabled [ 43.105733][ T4574] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 43.107465][ T4574] BTRFS info (device loop0): trying to use backup root at mount time [ 43.108863][ T4574] BTRFS info (device loop0): metadata ratio 1564 [ 43.109870][ T4574] BTRFS info (device loop0): doing ref verification [ 43.110938][ T4574] BTRFS info (device loop0): force zlib compression, level 3 [ 43.112126][ T4574] BTRFS info (device loop0): turning on flush-on-commit [ 43.113264][ T4574] BTRFS info (device loop0): using free space tree [ 43.114513][ T4574] BTRFS info (device loop0): has skinny extents [ 43.169498][ T4574] BTRFS info (device loop0): enabling ssd optimizations [ 43.181796][ T4574] FAULT_INJECTION: forcing a failure. [ 43.181796][ T4574] name failslab, interval 1, probability 0, space 0, times 0 [ 43.183917][ T4574] CPU: 1 PID: 4574 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 43.185507][ T4574] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 43.187230][ T4574] Call trace: [ 43.187799][ T4574] dump_backtrace+0x0/0x458 [ 43.188604][ T4574] show_stack+0x2c/0x3c [ 43.189312][ T4574] __dump_stack+0x30/0x40 [ 43.189991][ T4574] dump_stack_lvl+0xf4/0x15c [ 43.190772][ T4574] dump_stack+0x1c/0x5c [ 43.191521][ T4574] should_fail+0x3c8/0x520 [ 43.192341][ T4574] __should_failslab+0xbc/0x10c [ 43.193238][ T4574] should_failslab+0x10/0x28 [ 43.194100][ T4574] slab_pre_alloc_hook+0x64/0xe8 [ 43.194917][ T4574] kmem_cache_alloc+0x94/0x3d8 [ 43.195751][ T4574] alloc_extent_state+0x38/0x434 [ 43.196581][ T4574] convert_extent_bit+0x188/0x171c [ 43.197410][ T4574] btrfs_write_marked_extents+0x17c/0x368 [ 43.198401][ T4574] btrfs_sync_log+0x1290/0x1e7c [ 43.199202][ T4574] btrfs_sync_file+0xa2c/0xf2c [ 43.199997][ T4574] vfs_fsync_range+0x168/0x188 [ 43.200820][ T4574] btrfs_file_write_iter+0xa58/0xc18 [ 43.201680][ T4574] vfs_write+0x590/0xa64 [ 43.202519][ T4574] ksys_write+0x12c/0x228 [ 43.203347][ T4574] __arm64_sys_write+0x7c/0x90 [ 43.204253][ T4574] invoke_syscall+0x98/0x28c [ 43.204997][ T4574] el0_svc_common+0x13c/0x258 [ 43.205831][ T4574] do_el0_svc+0x5c/0x140 [ 43.206561][ T4574] el0_svc+0x78/0x1d0 [ 43.207232][ T4574] el0t_64_sync_handler+0xcc/0xe4 [ 43.208043][ T4574] el0t_64_sync+0x1a0/0x1a4 [ 43.458100][ T4628] loop0: detected capacity change from 0 to 32768 [ 43.463109][ T4628] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4628) [ 43.469824][ T4628] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 43.471541][ T4628] BTRFS info (device loop0): setting nodatacow, compression disabled [ 43.473058][ T4628] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 43.474901][ T4628] BTRFS info (device loop0): trying to use backup root at mount time [ 43.476738][ T4628] BTRFS info (device loop0): metadata ratio 1564 [ 43.477899][ T4628] BTRFS info (device loop0): doing ref verification [ 43.479110][ T4628] BTRFS info (device loop0): force zlib compression, level 3 [ 43.480560][ T4628] BTRFS info (device loop0): turning on flush-on-commit [ 43.481863][ T4628] BTRFS info (device loop0): using free space tree [ 43.483106][ T4628] BTRFS info (device loop0): has skinny extents [ 43.495632][ T4628] BTRFS info (device loop0): enabling ssd optimizations [ 43.501055][ T4628] FAULT_INJECTION: forcing a failure. [ 43.501055][ T4628] name failslab, interval 1, probability 0, space 0, times 0 [ 43.503382][ T4628] CPU: 1 PID: 4628 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 43.504821][ T4628] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 43.506561][ T4628] Call trace: [ 43.507082][ T4628] dump_backtrace+0x0/0x458 [ 43.507880][ T4628] show_stack+0x2c/0x3c [ 43.508555][ T4628] __dump_stack+0x30/0x40 [ 43.509331][ T4628] dump_stack_lvl+0xf4/0x15c [ 43.510119][ T4628] dump_stack+0x1c/0x5c [ 43.510853][ T4628] should_fail+0x3c8/0x520 [ 43.511625][ T4628] __should_failslab+0xbc/0x10c [ 43.512475][ T4628] should_failslab+0x10/0x28 [ 43.513289][ T4628] slab_pre_alloc_hook+0x64/0xe8 [ 43.514177][ T4628] kmem_cache_alloc+0x94/0x3d8 [ 43.515042][ T4628] alloc_extent_state+0x38/0x434 [ 43.515903][ T4628] convert_extent_bit+0x188/0x171c [ 43.516806][ T4628] btrfs_write_marked_extents+0x17c/0x368 [ 43.517769][ T4628] btrfs_sync_log+0x1290/0x1e7c [ 43.518605][ T4628] btrfs_sync_file+0xa2c/0xf2c [ 43.519431][ T4628] vfs_fsync_range+0x168/0x188 [ 43.520233][ T4628] btrfs_file_write_iter+0xa58/0xc18 [ 43.521155][ T4628] vfs_write+0x590/0xa64 [ 43.521896][ T4628] ksys_write+0x12c/0x228 [ 43.522680][ T4628] __arm64_sys_write+0x7c/0x90 [ 43.523477][ T4628] invoke_syscall+0x98/0x28c [ 43.524225][ T4628] el0_svc_common+0x13c/0x258 [ 43.525055][ T4628] do_el0_svc+0x5c/0x140 [ 43.525815][ T4628] el0_svc+0x78/0x1d0 [ 43.526476][ T4628] el0t_64_sync_handler+0xcc/0xe4 [ 43.527344][ T4628] el0t_64_sync+0x1a0/0x1a4 [ 43.719185][ T4649] loop0: detected capacity change from 0 to 32768 [ 43.722030][ T4649] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4649) [ 43.725940][ T4649] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 43.727594][ T4649] BTRFS info (device loop0): setting nodatacow, compression disabled [ 43.729019][ T4649] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 43.730787][ T4649] BTRFS info (device loop0): trying to use backup root at mount time [ 43.732265][ T4649] BTRFS info (device loop0): metadata ratio 1564 [ 43.733463][ T4649] BTRFS info (device loop0): doing ref verification [ 43.735160][ T4649] BTRFS info (device loop0): force zlib compression, level 3 [ 43.736456][ T4649] BTRFS info (device loop0): turning on flush-on-commit [ 43.737589][ T4649] BTRFS info (device loop0): using free space tree [ 43.738721][ T4649] BTRFS info (device loop0): has skinny extents [ 43.747364][ T4649] BTRFS info (device loop0): enabling ssd optimizations [ 43.753419][ T4649] FAULT_INJECTION: forcing a failure. [ 43.753419][ T4649] name failslab, interval 1, probability 0, space 0, times 0 [ 43.757040][ T4649] CPU: 1 PID: 4649 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 43.758601][ T4649] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 43.760348][ T4649] Call trace: [ 43.760886][ T4649] dump_backtrace+0x0/0x458 [ 43.761701][ T4649] show_stack+0x2c/0x3c [ 43.762436][ T4649] __dump_stack+0x30/0x40 [ 43.763172][ T4649] dump_stack_lvl+0xf4/0x15c [ 43.764020][ T4649] dump_stack+0x1c/0x5c [ 43.764763][ T4649] should_fail+0x3c8/0x520 [ 43.765487][ T4649] __should_failslab+0xbc/0x10c [ 43.766404][ T4649] should_failslab+0x10/0x28 [ 43.767233][ T4649] slab_pre_alloc_hook+0x64/0xe8 [ 43.768191][ T4649] kmem_cache_alloc+0x94/0x3d8 [ 43.769114][ T4649] alloc_extent_state+0x38/0x434 [ 43.770091][ T4649] convert_extent_bit+0x188/0x171c [ 43.771019][ T4649] btrfs_write_marked_extents+0x17c/0x368 [ 43.771985][ T4649] btrfs_sync_log+0x1290/0x1e7c [ 43.772829][ T4649] btrfs_sync_file+0xa2c/0xf2c [ 43.773636][ T4649] vfs_fsync_range+0x168/0x188 [ 43.774420][ T4649] btrfs_file_write_iter+0xa58/0xc18 [ 43.775391][ T4649] vfs_write+0x590/0xa64 [ 43.776055][ T4649] ksys_write+0x12c/0x228 [ 43.776768][ T4649] __arm64_sys_write+0x7c/0x90 [ 43.777527][ T4649] invoke_syscall+0x98/0x28c [ 43.778313][ T4649] el0_svc_common+0x13c/0x258 [ 43.779106][ T4649] do_el0_svc+0x5c/0x140 [ 43.779834][ T4649] el0_svc+0x78/0x1d0 [ 43.780573][ T4649] el0t_64_sync_handler+0xcc/0xe4 [ 43.781410][ T4649] el0t_64_sync+0x1a0/0x1a4 [ 43.970132][ T4670] loop0: detected capacity change from 0 to 32768 [ 43.973016][ T4670] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4670) [ 43.976809][ T4670] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 43.979377][ T4670] BTRFS info (device loop0): setting nodatacow, compression disabled [ 43.980782][ T4670] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 43.982739][ T4670] BTRFS info (device loop0): trying to use backup root at mount time [ 43.984597][ T4670] BTRFS info (device loop0): metadata ratio 1564 [ 43.985894][ T4670] BTRFS info (device loop0): doing ref verification [ 43.987030][ T4670] BTRFS info (device loop0): force zlib compression, level 3 [ 43.988500][ T4670] BTRFS info (device loop0): turning on flush-on-commit [ 43.989860][ T4670] BTRFS info (device loop0): using free space tree [ 43.991018][ T4670] BTRFS info (device loop0): has skinny extents [ 44.002675][ T4670] BTRFS info (device loop0): enabling ssd optimizations [ 44.009045][ T4670] FAULT_INJECTION: forcing a failure. [ 44.009045][ T4670] name failslab, interval 1, probability 0, space 0, times 0 [ 44.011284][ T4670] CPU: 1 PID: 4670 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.012725][ T4670] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.014353][ T4670] Call trace: [ 44.014878][ T4670] dump_backtrace+0x0/0x458 [ 44.015590][ T4670] show_stack+0x2c/0x3c [ 44.016268][ T4670] __dump_stack+0x30/0x40 [ 44.016993][ T4670] dump_stack_lvl+0xf4/0x15c [ 44.017783][ T4670] dump_stack+0x1c/0x5c [ 44.018472][ T4670] should_fail+0x3c8/0x520 [ 44.019193][ T4670] __should_failslab+0xbc/0x10c [ 44.020018][ T4670] should_failslab+0x10/0x28 [ 44.020796][ T4670] slab_pre_alloc_hook+0x64/0xe8 [ 44.021575][ T4670] kmem_cache_alloc+0x94/0x3d8 [ 44.022366][ T4670] btrfs_insert_item+0xd0/0x2bc [ 44.023155][ T4670] btrfs_insert_root+0xa4/0x14c [ 44.023975][ T4670] btrfs_sync_log+0xb14/0x1e7c [ 44.024771][ T4670] btrfs_sync_file+0xa2c/0xf2c [ 44.025573][ T4670] vfs_fsync_range+0x168/0x188 [ 44.026390][ T4670] btrfs_file_write_iter+0xa58/0xc18 [ 44.027288][ T4670] vfs_write+0x590/0xa64 [ 44.028021][ T4670] ksys_write+0x12c/0x228 [ 44.028721][ T4670] __arm64_sys_write+0x7c/0x90 [ 44.029515][ T4670] invoke_syscall+0x98/0x28c [ 44.030288][ T4670] el0_svc_common+0x13c/0x258 [ 44.031023][ T4670] do_el0_svc+0x5c/0x140 [ 44.031730][ T4670] el0_svc+0x78/0x1d0 [ 44.032354][ T4670] el0t_64_sync_handler+0xcc/0xe4 [ 44.033183][ T4670] el0t_64_sync+0x1a0/0x1a4 [ 44.035160][ T4670] ------------[ cut here ]------------ [ 44.036088][ T4670] WARNING: CPU: 1 PID: 4670 at fs/btrfs/tree-log.c:3224 btrfs_sync_log+0x13d4/0x1e7c [ 44.037637][ T4670] Modules linked in: [ 44.038249][ T4670] CPU: 1 PID: 4670 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.039945][ T4670] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.041771][ T4670] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 44.043147][ T4670] pc : btrfs_sync_log+0x13d4/0x1e7c [ 44.044105][ T4670] lr : btrfs_sync_log+0x13d4/0x1e7c [ 44.044939][ T4670] sp : ffff80001fef7400 [ 44.045626][ T4670] x29: ffff80001fef7800 x28: 00000000fffffff4 x27: dfff800000000000 [ 44.046969][ T4670] x26: ffff80001fef74c0 x25: ffff0000ded3d9a0 x24: 1fffe000195ba09d [ 44.048274][ T4670] x23: ffff0000d0da44e0 x22: ffff0000d57b6000 x21: ffff80001fef7748 [ 44.049641][ T4670] x20: ffff0000cc97e000 x19: ffff0000ded3d9f8 x18: 0000000000000000 [ 44.050965][ T4670] x17: 0000000000000000 x16: ffff80001135f958 x15: 0000000000000000 [ 44.052280][ T4670] x14: 0000000000000001 x13: 1fffe000341d09ab x12: 0000000000000000 [ 44.053632][ T4670] x11: ff80800008300a38 x10: 0000000000000000 x9 : b631323b423b6a00 [ 44.054923][ T4670] x8 : b631323b423b6a00 x7 : 0000000000000001 x6 : 0000000000000001 [ 44.056215][ T4670] x5 : ffff80001fef6d18 x4 : ffff80001447f520 x3 : ffff80000850fcd0 [ 44.057534][ T4670] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 44.058856][ T4670] Call trace: [ 44.059403][ T4670] btrfs_sync_log+0x13d4/0x1e7c [ 44.060208][ T4670] btrfs_sync_file+0xa2c/0xf2c [ 44.061002][ T4670] vfs_fsync_range+0x168/0x188 [ 44.061803][ T4670] btrfs_file_write_iter+0xa58/0xc18 [ 44.062699][ T4670] vfs_write+0x590/0xa64 [ 44.063403][ T4670] ksys_write+0x12c/0x228 [ 44.064069][ T4670] __arm64_sys_write+0x7c/0x90 [ 44.064865][ T4670] invoke_syscall+0x98/0x28c [ 44.065676][ T4670] el0_svc_common+0x13c/0x258 [ 44.066433][ T4670] do_el0_svc+0x5c/0x140 [ 44.067084][ T4670] el0_svc+0x78/0x1d0 [ 44.067711][ T4670] el0t_64_sync_handler+0xcc/0xe4 [ 44.068514][ T4670] el0t_64_sync+0x1a0/0x1a4 [ 44.069295][ T4670] irq event stamp: 80908 [ 44.070009][ T4670] hardirqs last enabled at (80907): [] __up_console_sem+0xb4/0xfc [ 44.071648][ T4670] hardirqs last disabled at (80908): [] el1_dbg+0x24/0x80 [ 44.073062][ T4670] softirqs last enabled at (80878): [] handle_softirqs+0xa70/0xc14 [ 44.074695][ T4670] softirqs last disabled at (80757): [] __irq_exit_rcu+0x240/0x434 [ 44.076212][ T4670] ---[ end trace 84f9bdcceacb1672 ]--- [ 44.078112][ T4670] BTRFS: error (device loop0) in btrfs_sync_log:3224: errno=-12 Out of memory [ 44.079546][ T4670] BTRFS info (device loop0): forced readonly [ 44.261687][ T4691] loop0: detected capacity change from 0 to 32768 [ 44.265659][ T4691] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4691) [ 44.273305][ T4691] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 44.275629][ T4691] BTRFS info (device loop0): setting nodatacow, compression disabled [ 44.277179][ T4691] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 44.279240][ T4691] BTRFS info (device loop0): trying to use backup root at mount time [ 44.280739][ T4691] BTRFS info (device loop0): metadata ratio 1564 [ 44.281830][ T4691] BTRFS info (device loop0): doing ref verification [ 44.282980][ T4691] BTRFS info (device loop0): force zlib compression, level 3 [ 44.284201][ T4691] BTRFS info (device loop0): turning on flush-on-commit [ 44.285303][ T4691] BTRFS info (device loop0): using free space tree [ 44.286383][ T4691] BTRFS info (device loop0): has skinny extents [ 44.295915][ T4691] BTRFS info (device loop0): enabling ssd optimizations [ 44.301326][ T4691] FAULT_INJECTION: forcing a failure. [ 44.301326][ T4691] name failslab, interval 1, probability 0, space 0, times 0 [ 44.303575][ T4691] CPU: 1 PID: 4691 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.305115][ T4691] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.306890][ T4691] Call trace: [ 44.307457][ T4691] dump_backtrace+0x0/0x458 [ 44.308228][ T4691] show_stack+0x2c/0x3c [ 44.308923][ T4691] __dump_stack+0x30/0x40 [ 44.309756][ T4691] dump_stack_lvl+0xf4/0x15c [ 44.310478][ T4691] dump_stack+0x1c/0x5c [ 44.311156][ T4691] should_fail+0x3c8/0x520 [ 44.311954][ T4691] __should_failslab+0xbc/0x10c [ 44.312736][ T4691] should_failslab+0x10/0x28 [ 44.313574][ T4691] slab_pre_alloc_hook+0x64/0xe8 [ 44.314454][ T4691] kmem_cache_alloc+0x94/0x3d8 [ 44.315306][ T4691] mempool_alloc_slab+0x58/0x74 [ 44.316124][ T4691] mempool_alloc+0x148/0x3d4 [ 44.317027][ T4691] bio_alloc_bioset+0x1d8/0x700 [ 44.317837][ T4691] submit_extent_page+0x420/0x1264 [ 44.318707][ T4691] write_one_eb+0x1b8/0x550 [ 44.319471][ T4691] btree_writepages+0xedc/0x153c [ 44.320348][ T4691] do_writepages+0x374/0x588 [ 44.321242][ T4691] filemap_fdatawrite_wbc+0x1d4/0x234 [ 44.322196][ T4691] filemap_fdatawrite_range+0xc0/0x114 [ 44.323237][ T4691] btrfs_write_marked_extents+0x1c0/0x368 [ 44.324263][ T4691] btrfs_sync_log+0x75c/0x1e7c [ 44.325130][ T4691] btrfs_sync_file+0xa2c/0xf2c [ 44.326012][ T4691] vfs_fsync_range+0x168/0x188 [ 44.326967][ T4691] btrfs_file_write_iter+0xa58/0xc18 [ 44.327925][ T4691] vfs_write+0x590/0xa64 [ 44.328628][ T4691] ksys_write+0x12c/0x228 [ 44.329394][ T4691] __arm64_sys_write+0x7c/0x90 [ 44.330188][ T4691] invoke_syscall+0x98/0x28c [ 44.330998][ T4691] el0_svc_common+0x13c/0x258 [ 44.331802][ T4691] do_el0_svc+0x5c/0x140 [ 44.332654][ T4691] el0_svc+0x78/0x1d0 [ 44.333398][ T4691] el0t_64_sync_handler+0xcc/0xe4 [ 44.334304][ T4691] el0t_64_sync+0x1a0/0x1a4 [ 44.534604][ T4712] loop0: detected capacity change from 0 to 32768 [ 44.537650][ T4712] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4712) [ 44.541247][ T4712] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 44.542711][ T4712] BTRFS info (device loop0): setting nodatacow, compression disabled [ 44.543983][ T4712] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 44.545923][ T4712] BTRFS info (device loop0): trying to use backup root at mount time [ 44.547316][ T4712] BTRFS info (device loop0): metadata ratio 1564 [ 44.548419][ T4712] BTRFS info (device loop0): doing ref verification [ 44.549551][ T4712] BTRFS info (device loop0): force zlib compression, level 3 [ 44.550858][ T4712] BTRFS info (device loop0): turning on flush-on-commit [ 44.552041][ T4712] BTRFS info (device loop0): using free space tree [ 44.553228][ T4712] BTRFS info (device loop0): has skinny extents [ 44.562028][ T4712] BTRFS info (device loop0): enabling ssd optimizations [ 44.572846][ T4712] FAULT_INJECTION: forcing a failure. [ 44.572846][ T4712] name failslab, interval 1, probability 0, space 0, times 0 [ 44.575435][ T4712] CPU: 0 PID: 4712 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.577033][ T4712] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.578650][ T4712] Call trace: [ 44.579144][ T4712] dump_backtrace+0x0/0x458 [ 44.579831][ T4712] show_stack+0x2c/0x3c [ 44.580428][ T4712] __dump_stack+0x30/0x40 [ 44.581054][ T4712] dump_stack_lvl+0xf4/0x15c [ 44.581790][ T4712] dump_stack+0x1c/0x5c [ 44.582428][ T4712] should_fail+0x3c8/0x520 [ 44.583078][ T4712] __should_failslab+0xbc/0x10c [ 44.583835][ T4712] should_failslab+0x10/0x28 [ 44.584578][ T4712] slab_pre_alloc_hook+0x64/0xe8 [ 44.585344][ T4712] kmem_cache_alloc+0x94/0x3d8 [ 44.586119][ T4712] btrfs_insert_item+0xd0/0x2bc [ 44.586878][ T4712] btrfs_insert_root+0xa4/0x14c [ 44.587682][ T4712] btrfs_sync_log+0xb14/0x1e7c [ 44.588429][ T4712] btrfs_sync_file+0xa2c/0xf2c [ 44.589194][ T4712] vfs_fsync_range+0x168/0x188 [ 44.589953][ T4712] btrfs_file_write_iter+0xa58/0xc18 [ 44.590786][ T4712] vfs_write+0x590/0xa64 [ 44.591437][ T4712] ksys_write+0x12c/0x228 [ 44.592278][ T4712] __arm64_sys_write+0x7c/0x90 [ 44.593182][ T4712] invoke_syscall+0x98/0x28c [ 44.594065][ T4712] el0_svc_common+0x13c/0x258 [ 44.594929][ T4712] do_el0_svc+0x5c/0x140 [ 44.595714][ T4712] el0_svc+0x78/0x1d0 [ 44.596418][ T4712] el0t_64_sync_handler+0xcc/0xe4 [ 44.597282][ T4712] el0t_64_sync+0x1a0/0x1a4 [ 44.601177][ T4712] ------------[ cut here ]------------ [ 44.602132][ T4712] WARNING: CPU: 0 PID: 4712 at fs/btrfs/tree-log.c:3224 btrfs_sync_log+0x13d4/0x1e7c [ 44.603537][ T4712] Modules linked in: [ 44.604184][ T4712] CPU: 0 PID: 4712 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.605791][ T4712] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.607447][ T4712] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 44.608641][ T4712] pc : btrfs_sync_log+0x13d4/0x1e7c [ 44.609453][ T4712] lr : btrfs_sync_log+0x13d4/0x1e7c [ 44.610320][ T4712] sp : ffff800020237400 [ 44.610990][ T4712] x29: ffff800020237800 x28: 00000000fffffff4 x27: dfff800000000000 [ 44.612457][ T4712] x26: ffff8000202374c0 x25: ffff0000ded39d10 x24: 1fffe0001ae8749d [ 44.613694][ T4712] x23: ffff0000ce1384e0 x22: ffff0000d7438000 x21: ffff800020237748 [ 44.615009][ T4712] x20: ffff0000c8e3a000 x19: ffff0000ded39d68 x18: 0000000000000000 [ 44.616262][ T4712] x17: 0000000000000000 x16: ffff80001135f958 x15: 0000000000000000 [ 44.617606][ T4712] x14: 0000000000000001 x13: 1fffe000341cc7ab x12: 0000000000000000 [ 44.618942][ T4712] x11: ff80800008300a38 x10: 0000000000000000 x9 : 1be13d0ea158a500 [ 44.620245][ T4712] x8 : 1be13d0ea158a500 x7 : 0000000000000001 x6 : 0000000000000001 [ 44.621498][ T4712] x5 : ffff800020236d18 x4 : ffff80001447f520 x3 : ffff80000850fcd0 [ 44.622770][ T4712] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 44.624130][ T4712] Call trace: [ 44.624695][ T4712] btrfs_sync_log+0x13d4/0x1e7c [ 44.625525][ T4712] btrfs_sync_file+0xa2c/0xf2c [ 44.626355][ T4712] vfs_fsync_range+0x168/0x188 [ 44.627210][ T4712] btrfs_file_write_iter+0xa58/0xc18 [ 44.628127][ T4712] vfs_write+0x590/0xa64 [ 44.628828][ T4712] ksys_write+0x12c/0x228 [ 44.629542][ T4712] __arm64_sys_write+0x7c/0x90 [ 44.630371][ T4712] invoke_syscall+0x98/0x28c [ 44.631133][ T4712] el0_svc_common+0x13c/0x258 [ 44.631913][ T4712] do_el0_svc+0x5c/0x140 [ 44.632592][ T4712] el0_svc+0x78/0x1d0 [ 44.633257][ T4712] el0t_64_sync_handler+0xcc/0xe4 [ 44.634086][ T4712] el0t_64_sync+0x1a0/0x1a4 [ 44.634861][ T4712] irq event stamp: 80802 [ 44.635521][ T4712] hardirqs last enabled at (80801): [] __up_console_sem+0xb4/0xfc [ 44.637129][ T4712] hardirqs last disabled at (80802): [] el1_dbg+0x24/0x80 [ 44.638485][ T4712] softirqs last enabled at (80772): [] handle_softirqs+0xa70/0xc14 [ 44.640120][ T4712] softirqs last disabled at (80751): [] __irq_exit_rcu+0x240/0x434 [ 44.641688][ T4712] ---[ end trace 84f9bdcceacb1673 ]--- [ 44.643474][ T4712] BTRFS: error (device loop0) in btrfs_sync_log:3224: errno=-12 Out of memory [ 44.645826][ T4712] BTRFS info (device loop0): forced readonly [ 44.665681][ T4433] Bluetooth: hci0: command 0x041b tx timeout [ 44.842445][ T4733] loop0: detected capacity change from 0 to 32768 [ 44.845544][ T4733] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4733) [ 44.849975][ T4733] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 44.851607][ T4733] BTRFS info (device loop0): setting nodatacow, compression disabled [ 44.852983][ T4733] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 44.854872][ T4733] BTRFS info (device loop0): trying to use backup root at mount time [ 44.856202][ T4733] BTRFS info (device loop0): metadata ratio 1564 [ 44.857211][ T4733] BTRFS info (device loop0): doing ref verification [ 44.858310][ T4733] BTRFS info (device loop0): force zlib compression, level 3 [ 44.859593][ T4733] BTRFS info (device loop0): turning on flush-on-commit [ 44.872852][ T4733] FAULT_INJECTION: forcing a failure. [ 44.872852][ T4733] name failslab, interval 1, probability 0, space 0, times 0 [ 44.875174][ T4733] CPU: 0 PID: 4733 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.876719][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.878365][ T4733] Call trace: [ 44.878948][ T4733] dump_backtrace+0x0/0x458 [ 44.879689][ T4733] show_stack+0x2c/0x3c [ 44.880381][ T4733] __dump_stack+0x30/0x40 [ 44.881090][ T4733] dump_stack_lvl+0xf4/0x15c [ 44.881826][ T4733] dump_stack+0x1c/0x5c [ 44.882504][ T4733] should_fail+0x3c8/0x520 [ 44.883229][ T4733] __should_failslab+0xbc/0x10c [ 44.883961][ T4733] should_failslab+0x10/0x28 [ 44.884720][ T4733] slab_pre_alloc_hook+0x64/0xe8 [ 44.885566][ T4733] kmem_cache_alloc+0x94/0x3d8 [ 44.886360][ T4733] btrfs_insert_item+0xd0/0x2bc [ 44.887151][ T4733] btrfs_insert_root+0xa4/0x14c [ 44.887910][ T4733] btrfs_sync_log+0xb14/0x1e7c [ 44.888734][ T4733] btrfs_sync_file+0xa2c/0xf2c [ 44.889556][ T4733] vfs_fsync_range+0x168/0x188 [ 44.890343][ T4733] btrfs_file_write_iter+0xa58/0xc18 [ 44.891278][ T4733] vfs_write+0x590/0xa64 [ 44.891985][ T4733] ksys_write+0x12c/0x228 [ 44.892722][ T4733] __arm64_sys_write+0x7c/0x90 [ 44.893546][ T4733] invoke_syscall+0x98/0x28c [ 44.894299][ T4733] el0_svc_common+0x13c/0x258 [ 44.895137][ T4733] do_el0_svc+0x5c/0x140 [ 44.895823][ T4733] el0_svc+0x78/0x1d0 [ 44.896475][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 44.897332][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 44.899596][ T4733] ------------[ cut here ]------------ [ 44.900689][ T4733] WARNING: CPU: 0 PID: 4733 at fs/btrfs/tree-log.c:3224 btrfs_sync_log+0x13d4/0x1e7c [ 44.902262][ T4733] Modules linked in: [ 44.902977][ T4733] CPU: 0 PID: 4733 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 44.904359][ T4733] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 44.906095][ T4733] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 44.907395][ T4733] pc : btrfs_sync_log+0x13d4/0x1e7c [ 44.908265][ T4733] lr : btrfs_sync_log+0x13d4/0x1e7c [ 44.909115][ T4733] sp : ffff80001fef7400 [ 44.909759][ T4733] x29: ffff80001fef7800 x28: 00000000fffffff4 x27: dfff800000000000 [ 44.911075][ T4733] x26: ffff80001fef74c0 x25: ffff0000ded39dc0 x24: 1fffe00019d7d09d [ 44.912478][ T4733] x23: ffff0000ce1384e0 x22: ffff0000d812c000 x21: ffff80001fef7748 [ 44.913840][ T4733] x20: ffff0000d7f26000 x19: ffff0000ded39e18 x18: 0000000000000000 [ 44.915183][ T4733] x17: 0000000000000000 x16: ffff80001135f958 x15: 0000000000000000 [ 44.916525][ T4733] x14: 0000000000000001 x13: 1fffe000341cc7ab x12: 0000000000000000 [ 44.917838][ T4733] x11: ff80800008300a38 x10: 0000000000000000 x9 : 407cab66d8efd500 [ 44.919224][ T4733] x8 : 407cab66d8efd500 x7 : 0000000000000001 x6 : 0000000000000001 [ 44.920669][ T4733] x5 : ffff80001fef6d18 x4 : ffff80001447f520 x3 : ffff80000850fcd0 [ 44.922060][ T4733] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 44.923431][ T4733] Call trace: [ 44.923991][ T4733] btrfs_sync_log+0x13d4/0x1e7c [ 44.924851][ T4733] btrfs_sync_file+0xa2c/0xf2c [ 44.925653][ T4733] vfs_fsync_range+0x168/0x188 [ 44.926480][ T4733] btrfs_file_write_iter+0xa58/0xc18 [ 44.927376][ T4733] vfs_write+0x590/0xa64 [ 44.928104][ T4733] ksys_write+0x12c/0x228 [ 44.928851][ T4733] __arm64_sys_write+0x7c/0x90 [ 44.929607][ T4733] invoke_syscall+0x98/0x28c [ 44.930386][ T4733] el0_svc_common+0x13c/0x258 [ 44.931196][ T4733] do_el0_svc+0x5c/0x140 [ 44.931896][ T4733] el0_svc+0x78/0x1d0 [ 44.932507][ T4733] el0t_64_sync_handler+0xcc/0xe4 [ 44.933283][ T4733] el0t_64_sync+0x1a0/0x1a4 [ 44.934004][ T4733] irq event stamp: 80414 [ 44.934674][ T4733] hardirqs last enabled at (80413): [] __up_console_sem+0xb4/0xfc [ 44.936246][ T4733] hardirqs last disabled at (80414): [] el1_dbg+0x24/0x80 [ 44.937768][ T4733] softirqs last enabled at (80388): [] handle_softirqs+0xa70/0xc14 [ 44.939402][ T4733] softirqs last disabled at (80365): [] __irq_exit_rcu+0x240/0x434 [ 44.941009][ T4733] ---[ end trace 84f9bdcceacb1674 ]--- [ 44.942711][ T4733] BTRFS: error (device loop0) in btrfs_sync_log:3224: errno=-12 Out of memory [ 45.135025][ T4754] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4754) [ 45.139137][ T4754] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 45.166351][ T4754] FAULT_INJECTION: forcing a failure. [ 45.166351][ T4754] name failslab, interval 1, probability 0, space 0, times 0 [ 45.168600][ T4754] CPU: 0 PID: 4754 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 45.170058][ T4754] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.171653][ T4754] Call trace: [ 45.172204][ T4754] dump_backtrace+0x0/0x458 [ 45.172988][ T4754] show_stack+0x2c/0x3c [ 45.173792][ T4754] __dump_stack+0x30/0x40 [ 45.174518][ T4754] dump_stack_lvl+0xf4/0x15c [ 45.175291][ T4754] dump_stack+0x1c/0x5c [ 45.175982][ T4754] should_fail+0x3c8/0x520 [ 45.176750][ T4754] __should_failslab+0xbc/0x10c [ 45.177601][ T4754] should_failslab+0x10/0x28 [ 45.178352][ T4754] slab_pre_alloc_hook+0x64/0xe8 [ 45.179180][ T4754] kmem_cache_alloc+0x94/0x3d8 [ 45.180012][ T4754] alloc_extent_state+0x38/0x434 [ 45.180839][ T4754] convert_extent_bit+0x188/0x171c [ 45.181716][ T4754] btrfs_write_marked_extents+0x17c/0x368 [ 45.182674][ T4754] btrfs_sync_log+0x1290/0x1e7c [ 45.183530][ T4754] btrfs_sync_file+0xa2c/0xf2c [ 45.184361][ T4754] vfs_fsync_range+0x168/0x188 [ 45.185228][ T4754] btrfs_file_write_iter+0xa58/0xc18 [ 45.186169][ T4754] vfs_write+0x590/0xa64 [ 45.186902][ T4754] ksys_write+0x12c/0x228 [ 45.187658][ T4754] __arm64_sys_write+0x7c/0x90 [ 45.188456][ T4754] invoke_syscall+0x98/0x28c [ 45.189225][ T4754] el0_svc_common+0x13c/0x258 [ 45.189985][ T4754] do_el0_svc+0x5c/0x140 [ 45.190703][ T4754] el0_svc+0x78/0x1d0 [ 45.191390][ T4754] el0t_64_sync_handler+0xcc/0xe4 [ 45.192286][ T4754] el0t_64_sync+0x1a0/0x1a4 [ 45.396330][ T4775] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4775) [ 45.400594][ T4775] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 45.416384][ T4775] FAULT_INJECTION: forcing a failure. [ 45.416384][ T4775] name failslab, interval 1, probability 0, space 0, times 0 [ 45.418720][ T4775] CPU: 1 PID: 4775 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 45.420162][ T4775] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.421957][ T4775] Call trace: [ 45.422452][ T4775] dump_backtrace+0x0/0x458 [ 45.423157][ T4775] show_stack+0x2c/0x3c [ 45.423927][ T4775] __dump_stack+0x30/0x40 [ 45.424663][ T4775] dump_stack_lvl+0xf4/0x15c [ 45.425478][ T4775] dump_stack+0x1c/0x5c [ 45.426194][ T4775] should_fail+0x3c8/0x520 [ 45.426951][ T4775] __should_failslab+0xbc/0x10c [ 45.427794][ T4775] should_failslab+0x10/0x28 [ 45.428542][ T4775] slab_pre_alloc_hook+0x64/0xe8 [ 45.429342][ T4775] kmem_cache_alloc+0x94/0x3d8 [ 45.430132][ T4775] mempool_alloc_slab+0x58/0x74 [ 45.430935][ T4775] mempool_alloc+0x148/0x3d4 [ 45.431767][ T4775] bio_alloc_bioset+0x118/0x700 [ 45.432568][ T4775] submit_extent_page+0x420/0x1264 [ 45.433407][ T4775] write_one_eb+0x1b8/0x550 [ 45.434207][ T4775] btree_writepages+0xedc/0x153c [ 45.435058][ T4775] do_writepages+0x374/0x588 [ 45.435829][ T4775] filemap_fdatawrite_wbc+0x1d4/0x234 [ 45.436913][ T4775] filemap_fdatawrite_range+0xc0/0x114 [ 45.437869][ T4775] btrfs_write_marked_extents+0x1c0/0x368 [ 45.438840][ T4775] btrfs_sync_log+0x75c/0x1e7c [ 45.439618][ T4775] btrfs_sync_file+0xa2c/0xf2c [ 45.440351][ T4775] vfs_fsync_range+0x168/0x188 [ 45.441130][ T4775] btrfs_file_write_iter+0xa58/0xc18 [ 45.442000][ T4775] vfs_write+0x590/0xa64 [ 45.442735][ T4775] ksys_write+0x12c/0x228 [ 45.443448][ T4775] __arm64_sys_write+0x7c/0x90 [ 45.444199][ T4775] invoke_syscall+0x98/0x28c [ 45.444919][ T4775] el0_svc_common+0x13c/0x258 [ 45.445690][ T4775] do_el0_svc+0x5c/0x140 [ 45.446368][ T4775] el0_svc+0x78/0x1d0 [ 45.446988][ T4775] el0t_64_sync_handler+0xcc/0xe4 [ 45.447858][ T4775] el0t_64_sync+0x1a0/0x1a4 [ 45.629530][ T4796] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4796) [ 45.634635][ T4796] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 45.660462][ T4796] FAULT_INJECTION: forcing a failure. [ 45.660462][ T4796] name fail_page_alloc, interval 1, probability 0, space 0, times 0 [ 45.662955][ T4796] CPU: 1 PID: 4796 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 45.664576][ T4796] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.666345][ T4796] Call trace: [ 45.666892][ T4796] dump_backtrace+0x0/0x458 [ 45.667698][ T4796] show_stack+0x2c/0x3c [ 45.668449][ T4796] __dump_stack+0x30/0x40 [ 45.669220][ T4796] dump_stack_lvl+0xf4/0x15c [ 45.669999][ T4796] dump_stack+0x1c/0x5c [ 45.670726][ T4796] should_fail+0x3c8/0x520 [ 45.671491][ T4796] should_fail_alloc_page+0x74/0xa8 [ 45.672393][ T4796] prepare_alloc_pages+0x160/0x460 [ 45.673306][ T4796] __alloc_pages+0x108/0x474 [ 45.674169][ T4796] alloc_pages+0x34c/0x5c0 [ 45.674880][ T4796] new_slab+0xdc/0x53c [ 45.675574][ T4796] ___slab_alloc+0x6ac/0xd84 [ 45.676334][ T4796] __slab_alloc+0x68/0xc0 [ 45.677060][ T4796] kmem_cache_alloc+0x2a8/0x3d8 [ 45.677904][ T4796] mempool_alloc_slab+0x58/0x74 [ 45.678726][ T4796] mempool_alloc+0x148/0x3d4 [ 45.679468][ T4796] bio_alloc_bioset+0x1d8/0x700 [ 45.680276][ T4796] submit_extent_page+0x420/0x1264 [ 45.681184][ T4796] write_one_eb+0x1b8/0x550 [ 45.681989][ T4796] btree_writepages+0xedc/0x153c [ 45.682766][ T4796] do_writepages+0x374/0x588 [ 45.683532][ T4796] filemap_fdatawrite_wbc+0x1d4/0x234 [ 45.684405][ T4796] filemap_fdatawrite_range+0xc0/0x114 [ 45.685306][ T4796] btrfs_write_marked_extents+0x1c0/0x368 [ 45.686300][ T4796] btrfs_sync_log+0x75c/0x1e7c [ 45.687098][ T4796] btrfs_sync_file+0xa2c/0xf2c [ 45.687851][ T4796] vfs_fsync_range+0x168/0x188 [ 45.688687][ T4796] btrfs_file_write_iter+0xa58/0xc18 [ 45.689709][ T4796] vfs_write+0x590/0xa64 [ 45.690400][ T4796] ksys_write+0x12c/0x228 [ 45.691140][ T4796] __arm64_sys_write+0x7c/0x90 [ 45.692003][ T4796] invoke_syscall+0x98/0x28c [ 45.692838][ T4796] el0_svc_common+0x13c/0x258 [ 45.693639][ T4796] do_el0_svc+0x5c/0x140 [ 45.694407][ T4796] el0_svc+0x78/0x1d0 [ 45.695067][ T4796] el0t_64_sync_handler+0xcc/0xe4 [ 45.695939][ T4796] el0t_64_sync+0x1a0/0x1a4 1970/01/01 00:00:45 executed programs: 13 [ 45.906637][ T4817] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4817) [ 45.915549][ T4817] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 45.934868][ T4817] FAULT_INJECTION: forcing a failure. [ 45.934868][ T4817] name failslab, interval 1, probability 0, space 0, times 0 [ 45.937079][ T4817] CPU: 1 PID: 4817 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 45.938503][ T4817] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 45.940152][ T4817] Call trace: [ 45.940688][ T4817] dump_backtrace+0x0/0x458 [ 45.941439][ T4817] show_stack+0x2c/0x3c [ 45.942105][ T4817] __dump_stack+0x30/0x40 [ 45.942864][ T4817] dump_stack_lvl+0xf4/0x15c [ 45.943608][ T4817] dump_stack+0x1c/0x5c [ 45.944253][ T4817] should_fail+0x3c8/0x520 [ 45.945044][ T4817] __should_failslab+0xbc/0x10c [ 45.945903][ T4817] should_failslab+0x10/0x28 [ 45.946852][ T4817] slab_pre_alloc_hook+0x64/0xe8 [ 45.947853][ T4817] kmem_cache_alloc+0x94/0x3d8 [ 45.948753][ T4817] alloc_extent_state+0x38/0x434 [ 45.949635][ T4817] convert_extent_bit+0x188/0x171c [ 45.950545][ T4817] btrfs_write_marked_extents+0x17c/0x368 [ 45.951553][ T4817] btrfs_sync_log+0x1290/0x1e7c [ 45.952400][ T4817] btrfs_sync_file+0xa2c/0xf2c [ 45.953186][ T4817] vfs_fsync_range+0x168/0x188 [ 45.953973][ T4817] btrfs_file_write_iter+0xa58/0xc18 [ 45.954815][ T4817] vfs_write+0x590/0xa64 [ 45.955537][ T4817] ksys_write+0x12c/0x228 [ 45.956247][ T4817] __arm64_sys_write+0x7c/0x90 [ 45.957017][ T4817] invoke_syscall+0x98/0x28c [ 45.957770][ T4817] el0_svc_common+0x13c/0x258 [ 45.958540][ T4817] do_el0_svc+0x5c/0x140 [ 45.959237][ T4817] el0_svc+0x78/0x1d0 [ 45.959908][ T4817] el0t_64_sync_handler+0xcc/0xe4 [ 45.960778][ T4817] el0t_64_sync+0x1a0/0x1a4 [ 46.171861][ T4838] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4838) [ 46.175495][ T4838] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 46.189943][ T4838] FAULT_INJECTION: forcing a failure. [ 46.189943][ T4838] name failslab, interval 1, probability 0, space 0, times 0 [ 46.192889][ T4838] CPU: 1 PID: 4838 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 46.194481][ T4838] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.196194][ T4838] Call trace: [ 46.196750][ T4838] dump_backtrace+0x0/0x458 [ 46.197489][ T4838] show_stack+0x2c/0x3c [ 46.198254][ T4838] __dump_stack+0x30/0x40 [ 46.198999][ T4838] dump_stack_lvl+0xf4/0x15c [ 46.199731][ T4838] dump_stack+0x1c/0x5c [ 46.200426][ T4838] should_fail+0x3c8/0x520 [ 46.201170][ T4838] __should_failslab+0xbc/0x10c [ 46.201940][ T4838] should_failslab+0x10/0x28 [ 46.202723][ T4838] slab_pre_alloc_hook+0x64/0xe8 [ 46.203577][ T4838] kmem_cache_alloc+0x94/0x3d8 [ 46.204404][ T4838] mempool_alloc_slab+0x58/0x74 [ 46.205254][ T4838] mempool_alloc+0x148/0x3d4 [ 46.206070][ T4838] bio_alloc_bioset+0x118/0x700 [ 46.206899][ T4838] submit_extent_page+0x420/0x1264 [ 46.207795][ T4838] write_one_eb+0x1b8/0x550 [ 46.208563][ T4838] btree_writepages+0xedc/0x153c [ 46.209423][ T4838] do_writepages+0x374/0x588 [ 46.210173][ T4838] filemap_fdatawrite_wbc+0x1d4/0x234 [ 46.211066][ T4838] filemap_fdatawrite_range+0xc0/0x114 [ 46.211936][ T4838] btrfs_write_marked_extents+0x1c0/0x368 [ 46.212897][ T4838] btrfs_sync_log+0x1290/0x1e7c [ 46.213685][ T4838] btrfs_sync_file+0xa2c/0xf2c [ 46.214484][ T4838] vfs_fsync_range+0x168/0x188 [ 46.215278][ T4838] btrfs_file_write_iter+0xa58/0xc18 [ 46.216184][ T4838] vfs_write+0x590/0xa64 [ 46.216909][ T4838] ksys_write+0x12c/0x228 [ 46.217598][ T4838] __arm64_sys_write+0x7c/0x90 [ 46.218384][ T4838] invoke_syscall+0x98/0x28c [ 46.219132][ T4838] el0_svc_common+0x13c/0x258 [ 46.219931][ T4838] do_el0_svc+0x5c/0x140 [ 46.220683][ T4838] el0_svc+0x78/0x1d0 [ 46.221336][ T4838] el0t_64_sync_handler+0xcc/0xe4 [ 46.222187][ T4838] el0t_64_sync+0x1a0/0x1a4 [ 46.410596][ T4859] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4859) [ 46.415499][ T4859] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 46.431625][ T4859] FAULT_INJECTION: forcing a failure. [ 46.431625][ T4859] name failslab, interval 1, probability 0, space 0, times 0 [ 46.433915][ T4859] CPU: 0 PID: 4859 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 46.435480][ T4859] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.437222][ T4859] Call trace: [ 46.437742][ T4859] dump_backtrace+0x0/0x458 [ 46.438628][ T4859] show_stack+0x2c/0x3c [ 46.439413][ T4859] __dump_stack+0x30/0x40 [ 46.440196][ T4859] dump_stack_lvl+0xf4/0x15c [ 46.441013][ T4859] dump_stack+0x1c/0x5c [ 46.441786][ T4859] should_fail+0x3c8/0x520 [ 46.442621][ T4859] __should_failslab+0xbc/0x10c [ 46.443430][ T4859] should_failslab+0x10/0x28 [ 46.444201][ T4859] slab_pre_alloc_hook+0x64/0xe8 [ 46.445005][ T4859] kmem_cache_alloc+0x94/0x3d8 [ 46.445869][ T4859] mempool_alloc_slab+0x58/0x74 [ 46.446685][ T4859] mempool_alloc+0x148/0x3d4 [ 46.447443][ T4859] bio_alloc_bioset+0x118/0x700 [ 46.448287][ T4859] submit_extent_page+0x420/0x1264 [ 46.449131][ T4859] write_one_eb+0x1b8/0x550 [ 46.449881][ T4859] btree_writepages+0xedc/0x153c [ 46.450702][ T4859] do_writepages+0x374/0x588 [ 46.451489][ T4859] filemap_fdatawrite_wbc+0x1d4/0x234 [ 46.452335][ T4859] filemap_fdatawrite_range+0xc0/0x114 [ 46.453279][ T4859] btrfs_write_marked_extents+0x1c0/0x368 [ 46.454238][ T4859] btrfs_sync_log+0x1290/0x1e7c [ 46.455000][ T4859] btrfs_sync_file+0xa2c/0xf2c [ 46.455783][ T4859] vfs_fsync_range+0x168/0x188 [ 46.456552][ T4859] btrfs_file_write_iter+0xa58/0xc18 [ 46.457388][ T4859] vfs_write+0x590/0xa64 [ 46.458098][ T4859] ksys_write+0x12c/0x228 [ 46.458819][ T4859] __arm64_sys_write+0x7c/0x90 [ 46.459587][ T4859] invoke_syscall+0x98/0x28c [ 46.460349][ T4859] el0_svc_common+0x13c/0x258 [ 46.461103][ T4859] do_el0_svc+0x5c/0x140 [ 46.461783][ T4859] el0_svc+0x78/0x1d0 [ 46.462444][ T4859] el0t_64_sync_handler+0xcc/0xe4 [ 46.463277][ T4859] el0t_64_sync+0x1a0/0x1a4 [ 46.654518][ T4880] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4880) [ 46.657879][ T4880] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 46.670837][ T4880] FAULT_INJECTION: forcing a failure. [ 46.670837][ T4880] name failslab, interval 1, probability 0, space 0, times 0 [ 46.673120][ T4880] CPU: 1 PID: 4880 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 46.674645][ T4880] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.676399][ T4880] Call trace: [ 46.677015][ T4880] dump_backtrace+0x0/0x458 [ 46.677891][ T4880] show_stack+0x2c/0x3c [ 46.678625][ T4880] __dump_stack+0x30/0x40 [ 46.679380][ T4880] dump_stack_lvl+0xf4/0x15c [ 46.680204][ T4880] dump_stack+0x1c/0x5c [ 46.680857][ T4880] should_fail+0x3c8/0x520 [ 46.681629][ T4880] __should_failslab+0xbc/0x10c [ 46.682476][ T4880] should_failslab+0x10/0x28 [ 46.683235][ T4880] slab_pre_alloc_hook+0x64/0xe8 [ 46.684041][ T4880] kmem_cache_alloc+0x94/0x3d8 [ 46.684797][ T4880] btrfs_insert_item+0xd0/0x2bc [ 46.685582][ T4880] btrfs_insert_root+0xa4/0x14c [ 46.686380][ T4880] btrfs_sync_log+0xb14/0x1e7c [ 46.687110][ T4880] btrfs_sync_file+0xa2c/0xf2c [ 46.687845][ T4880] vfs_fsync_range+0x168/0x188 [ 46.688597][ T4880] btrfs_file_write_iter+0xa58/0xc18 [ 46.689454][ T4880] vfs_write+0x590/0xa64 [ 46.690116][ T4880] ksys_write+0x12c/0x228 [ 46.690790][ T4880] __arm64_sys_write+0x7c/0x90 [ 46.691544][ T4880] invoke_syscall+0x98/0x28c [ 46.692302][ T4880] el0_svc_common+0x13c/0x258 [ 46.693050][ T4880] do_el0_svc+0x5c/0x140 [ 46.693709][ T4880] el0_svc+0x78/0x1d0 [ 46.694353][ T4880] el0t_64_sync_handler+0xcc/0xe4 [ 46.695186][ T4880] el0t_64_sync+0x1a0/0x1a4 [ 46.696878][ T4880] ------------[ cut here ]------------ [ 46.698065][ T4880] WARNING: CPU: 1 PID: 4880 at fs/btrfs/tree-log.c:3224 btrfs_sync_log+0x13d4/0x1e7c [ 46.699578][ T4880] Modules linked in: [ 46.700273][ T4880] CPU: 1 PID: 4880 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 46.701846][ T4880] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 46.703623][ T4880] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 46.704923][ T4880] pc : btrfs_sync_log+0x13d4/0x1e7c [ 46.705796][ T4880] lr : btrfs_sync_log+0x13d4/0x1e7c [ 46.706645][ T4880] sp : ffff800020ee7400 [ 46.707308][ T4880] x29: ffff800020ee7800 x28: 00000000fffffff4 x27: dfff800000000000 [ 46.708717][ T4880] x26: ffff800020ee74c0 x25: ffff0000dd2118f0 x24: 1fffe0001ab9089d [ 46.710038][ T4880] x23: ffff0000d11a84e0 x22: ffff0000d5c86000 x21: ffff800020ee7748 [ 46.711402][ T4880] x20: ffff0000da076000 x19: ffff0000dd211948 x18: 0000000000000000 [ 46.712988][ T4880] x17: 0000000000000000 x16: ffff80001135f958 x15: 0000000000000000 [ 46.714498][ T4880] x14: 0000000000000001 x13: 1fffe000341d09ab x12: 0000000000000000 [ 46.715892][ T4880] x11: ff80800008300a38 x10: 0000000000000000 x9 : 8f05399fb8d29f00 [ 46.717366][ T4880] x8 : 8f05399fb8d29f00 x7 : 0000000000000001 x6 : 0000000000000001 [ 46.718741][ T4880] x5 : ffff800020ee6d18 x4 : ffff80001447f520 x3 : ffff80000850fcd0 [ 46.720096][ T4880] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 46.721509][ T4880] Call trace: [ 46.722054][ T4880] btrfs_sync_log+0x13d4/0x1e7c [ 46.722925][ T4880] btrfs_sync_file+0xa2c/0xf2c [ 46.723736][ T4880] vfs_fsync_range+0x168/0x188 [ 46.724565][ T4880] btrfs_file_write_iter+0xa58/0xc18 [ 46.725469][ T4880] vfs_write+0x590/0xa64 [ 46.726206][ T4880] ksys_write+0x12c/0x228 [ 46.727053][ T4880] __arm64_sys_write+0x7c/0x90 [ 46.728045][ T4880] invoke_syscall+0x98/0x28c [ 46.728969][ T4880] el0_svc_common+0x13c/0x258 [ 46.729877][ T4880] do_el0_svc+0x5c/0x140 [ 46.730627][ T4880] el0_svc+0x78/0x1d0 [ 46.731319][ T4880] el0t_64_sync_handler+0xcc/0xe4 [ 46.732187][ T4880] el0t_64_sync+0x1a0/0x1a4 [ 46.732904][ T4880] irq event stamp: 79534 [ 46.733574][ T4880] hardirqs last enabled at (79533): [] __up_console_sem+0xb4/0xfc [ 46.735178][ T4880] hardirqs last disabled at (79534): [] el1_dbg+0x24/0x80 [ 46.736644][ T4880] softirqs last enabled at (79502): [] handle_softirqs+0xa70/0xc14 [ 46.738349][ T4880] softirqs last disabled at (79347): [] __irq_exit_rcu+0x240/0x434 [ 46.739965][ T4880] ---[ end trace 84f9bdcceacb1675 ]--- [ 46.741779][ T4880] BTRFS: error (device loop0) in btrfs_sync_log:3224: errno=-12 Out of memory [ 46.745404][ T4436] Bluetooth: hci0: command 0x040f tx timeout [ 46.951377][ T4901] set_capacity_and_notify: 7 callbacks suppressed [ 46.951385][ T4901] loop0: detected capacity change from 0 to 32768 [ 46.956252][ T4901] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4901) [ 46.959634][ T4901] btrfs_printk: 75 callbacks suppressed [ 46.959640][ T4901] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 46.962139][ T4901] BTRFS info (device loop0): setting nodatacow, compression disabled [ 46.963555][ T4901] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 46.965779][ T4901] BTRFS info (device loop0): trying to use backup root at mount time [ 46.967381][ T4901] BTRFS info (device loop0): metadata ratio 1564 [ 46.968517][ T4901] BTRFS info (device loop0): doing ref verification [ 46.969735][ T4901] BTRFS info (device loop0): force zlib compression, level 3 [ 46.970966][ T4901] BTRFS info (device loop0): turning on flush-on-commit [ 46.972180][ T4901] BTRFS info (device loop0): using free space tree [ 46.973354][ T4901] BTRFS info (device loop0): has skinny extents [ 46.988671][ T4901] BTRFS info (device loop0): enabling ssd optimizations [ 46.993716][ T4901] FAULT_INJECTION: forcing a failure. [ 46.993716][ T4901] name failslab, interval 1, probability 0, space 0, times 0 [ 46.997148][ T4901] CPU: 1 PID: 4901 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 46.998692][ T4901] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.000445][ T4901] Call trace: [ 47.001000][ T4901] dump_backtrace+0x0/0x458 [ 47.001817][ T4901] show_stack+0x2c/0x3c [ 47.002549][ T4901] __dump_stack+0x30/0x40 [ 47.003325][ T4901] dump_stack_lvl+0xf4/0x15c [ 47.004161][ T4901] dump_stack+0x1c/0x5c [ 47.004922][ T4901] should_fail+0x3c8/0x520 [ 47.005820][ T4901] __should_failslab+0xbc/0x10c [ 47.006771][ T4901] should_failslab+0x10/0x28 [ 47.007603][ T4901] slab_pre_alloc_hook+0x64/0xe8 [ 47.008534][ T4901] kmem_cache_alloc+0x94/0x3d8 [ 47.009398][ T4901] mempool_alloc_slab+0x58/0x74 [ 47.010279][ T4901] mempool_alloc+0x148/0x3d4 [ 47.011174][ T4901] bio_alloc_bioset+0x118/0x700 [ 47.011978][ T4901] submit_extent_page+0x420/0x1264 [ 47.012986][ T4901] write_one_eb+0x1b8/0x550 [ 47.013838][ T4901] btree_writepages+0xedc/0x153c [ 47.014784][ T4901] do_writepages+0x374/0x588 [ 47.015638][ T4901] filemap_fdatawrite_wbc+0x1d4/0x234 [ 47.016640][ T4901] filemap_fdatawrite_range+0xc0/0x114 [ 47.017621][ T4901] btrfs_write_marked_extents+0x1c0/0x368 [ 47.018690][ T4901] btrfs_sync_log+0x1290/0x1e7c [ 47.019585][ T4901] btrfs_sync_file+0xa2c/0xf2c [ 47.020384][ T4901] vfs_fsync_range+0x168/0x188 [ 47.021192][ T4901] btrfs_file_write_iter+0xa58/0xc18 [ 47.022076][ T4901] vfs_write+0x590/0xa64 [ 47.022789][ T4901] ksys_write+0x12c/0x228 [ 47.023572][ T4901] __arm64_sys_write+0x7c/0x90 [ 47.024416][ T4901] invoke_syscall+0x98/0x28c [ 47.025176][ T4901] el0_svc_common+0x13c/0x258 [ 47.025969][ T4901] do_el0_svc+0x5c/0x140 [ 47.026714][ T4901] el0_svc+0x78/0x1d0 [ 47.027389][ T4901] el0t_64_sync_handler+0xcc/0xe4 [ 47.028305][ T4901] el0t_64_sync+0x1a0/0x1a4 [ 47.213109][ T4922] loop0: detected capacity change from 0 to 32768 [ 47.217923][ T4922] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4922) [ 47.222218][ T4922] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 47.223933][ T4922] BTRFS info (device loop0): setting nodatacow, compression disabled [ 47.225492][ T4922] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 47.227445][ T4922] BTRFS info (device loop0): trying to use backup root at mount time [ 47.228924][ T4922] BTRFS info (device loop0): metadata ratio 1564 [ 47.230080][ T4922] BTRFS info (device loop0): doing ref verification [ 47.231282][ T4922] BTRFS info (device loop0): force zlib compression, level 3 [ 47.232591][ T4922] BTRFS info (device loop0): turning on flush-on-commit [ 47.233811][ T4922] BTRFS info (device loop0): using free space tree [ 47.235075][ T4922] BTRFS info (device loop0): has skinny extents [ 47.243849][ T4922] BTRFS info (device loop0): enabling ssd optimizations [ 47.249998][ T4922] FAULT_INJECTION: forcing a failure. [ 47.249998][ T4922] name failslab, interval 1, probability 0, space 0, times 0 [ 47.252198][ T4922] CPU: 0 PID: 4922 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.253637][ T4922] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.255338][ T4922] Call trace: [ 47.255886][ T4922] dump_backtrace+0x0/0x458 [ 47.256684][ T4922] show_stack+0x2c/0x3c [ 47.257392][ T4922] __dump_stack+0x30/0x40 [ 47.258125][ T4922] dump_stack_lvl+0xf4/0x15c [ 47.258946][ T4922] dump_stack+0x1c/0x5c [ 47.259668][ T4922] should_fail+0x3c8/0x520 [ 47.260488][ T4922] __should_failslab+0xbc/0x10c [ 47.261304][ T4922] should_failslab+0x10/0x28 [ 47.262075][ T4922] slab_pre_alloc_hook+0x64/0xe8 [ 47.262867][ T4922] kmem_cache_alloc+0x94/0x3d8 [ 47.263638][ T4922] mempool_alloc_slab+0x58/0x74 [ 47.264611][ T4922] mempool_alloc+0x148/0x3d4 [ 47.265482][ T4922] bio_alloc_bioset+0x118/0x700 [ 47.266339][ T4922] submit_extent_page+0x420/0x1264 [ 47.267246][ T4922] write_one_eb+0x1b8/0x550 [ 47.268040][ T4922] btree_writepages+0xedc/0x153c [ 47.269044][ T4922] do_writepages+0x374/0x588 [ 47.269974][ T4922] filemap_fdatawrite_wbc+0x1d4/0x234 [ 47.270889][ T4922] filemap_fdatawrite_range+0xc0/0x114 [ 47.271923][ T4922] btrfs_write_marked_extents+0x1c0/0x368 [ 47.272947][ T4922] btrfs_sync_log+0x1290/0x1e7c [ 47.273780][ T4922] btrfs_sync_file+0xa2c/0xf2c [ 47.274634][ T4922] vfs_fsync_range+0x168/0x188 [ 47.275574][ T4922] btrfs_file_write_iter+0xa58/0xc18 [ 47.276475][ T4922] vfs_write+0x590/0xa64 [ 47.277181][ T4922] ksys_write+0x12c/0x228 [ 47.277949][ T4922] __arm64_sys_write+0x7c/0x90 [ 47.278783][ T4922] invoke_syscall+0x98/0x28c [ 47.279657][ T4922] el0_svc_common+0x13c/0x258 [ 47.280565][ T4922] do_el0_svc+0x5c/0x140 [ 47.281238][ T4922] el0_svc+0x78/0x1d0 [ 47.281893][ T4922] el0t_64_sync_handler+0xcc/0xe4 [ 47.282735][ T4922] el0t_64_sync+0x1a0/0x1a4 [ 47.483028][ T4943] loop0: detected capacity change from 0 to 32768 [ 47.485911][ T4943] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4943) [ 47.490957][ T4943] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 47.492789][ T4943] BTRFS info (device loop0): setting nodatacow, compression disabled [ 47.494182][ T4943] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 47.496479][ T4943] BTRFS info (device loop0): trying to use backup root at mount time [ 47.497903][ T4943] BTRFS info (device loop0): metadata ratio 1564 [ 47.499028][ T4943] BTRFS info (device loop0): doing ref verification [ 47.500287][ T4943] BTRFS info (device loop0): force zlib compression, level 3 [ 47.501648][ T4943] BTRFS info (device loop0): turning on flush-on-commit [ 47.502771][ T4943] BTRFS info (device loop0): using free space tree [ 47.503903][ T4943] BTRFS info (device loop0): has skinny extents [ 47.518218][ T4943] BTRFS info (device loop0): enabling ssd optimizations [ 47.523371][ T4943] FAULT_INJECTION: forcing a failure. [ 47.523371][ T4943] name failslab, interval 1, probability 0, space 0, times 0 [ 47.525874][ T4943] CPU: 0 PID: 4943 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.527452][ T4943] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.529190][ T4943] Call trace: [ 47.529778][ T4943] dump_backtrace+0x0/0x458 [ 47.530583][ T4943] show_stack+0x2c/0x3c [ 47.531298][ T4943] __dump_stack+0x30/0x40 [ 47.532051][ T4943] dump_stack_lvl+0xf4/0x15c [ 47.532861][ T4943] dump_stack+0x1c/0x5c [ 47.533573][ T4943] should_fail+0x3c8/0x520 [ 47.534322][ T4943] __should_failslab+0xbc/0x10c [ 47.535198][ T4943] should_failslab+0x10/0x28 [ 47.535972][ T4943] slab_pre_alloc_hook+0x64/0xe8 [ 47.536797][ T4943] kmem_cache_alloc+0x94/0x3d8 [ 47.537607][ T4943] btrfs_insert_item+0xd0/0x2bc [ 47.538439][ T4943] btrfs_insert_root+0xa4/0x14c [ 47.539234][ T4943] btrfs_sync_log+0xb14/0x1e7c [ 47.540032][ T4943] btrfs_sync_file+0xa2c/0xf2c [ 47.540825][ T4943] vfs_fsync_range+0x168/0x188 [ 47.541630][ T4943] btrfs_file_write_iter+0xa58/0xc18 [ 47.542502][ T4943] vfs_write+0x590/0xa64 [ 47.543256][ T4943] ksys_write+0x12c/0x228 [ 47.543974][ T4943] __arm64_sys_write+0x7c/0x90 [ 47.544790][ T4943] invoke_syscall+0x98/0x28c [ 47.545548][ T4943] el0_svc_common+0x13c/0x258 [ 47.546329][ T4943] do_el0_svc+0x5c/0x140 [ 47.547046][ T4943] el0_svc+0x78/0x1d0 [ 47.547736][ T4943] el0t_64_sync_handler+0xcc/0xe4 [ 47.548756][ T4943] el0t_64_sync+0x1a0/0x1a4 [ 47.549864][ T4943] ------------[ cut here ]------------ [ 47.551056][ T4943] WARNING: CPU: 0 PID: 4943 at fs/btrfs/tree-log.c:3224 btrfs_sync_log+0x13d4/0x1e7c [ 47.552736][ T4943] Modules linked in: [ 47.553425][ T4943] CPU: 0 PID: 4943 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.554975][ T4943] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.556597][ T4943] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 47.557841][ T4943] pc : btrfs_sync_log+0x13d4/0x1e7c [ 47.558692][ T4943] lr : btrfs_sync_log+0x13d4/0x1e7c [ 47.559589][ T4943] sp : ffff8000211f7400 [ 47.560303][ T4943] x29: ffff8000211f7800 x28: 00000000fffffff4 x27: dfff800000000000 [ 47.561661][ T4943] x26: ffff8000211f74c0 x25: ffff0000ded39420 x24: 1fffe0001c7fb09d [ 47.563001][ T4943] x23: ffff0000d1f4c4e0 x22: ffff0000cd450000 x21: ffff8000211f7748 [ 47.564373][ T4943] x20: ffff0000e400a000 x19: ffff0000ded39478 x18: 0000000000000000 [ 47.565701][ T4943] x17: 0000000000000000 x16: ffff8000082c67fc x15: 0000000000000000 [ 47.567062][ T4943] x14: 0000000000000001 x13: 1ffff0000423eda0 x12: 0000000000000000 [ 47.568385][ T4943] x11: ff80800008300a38 x10: 0000000000000000 x9 : 5e5ec99f07648500 [ 47.569668][ T4943] x8 : 5e5ec99f07648500 x7 : 0000000000000001 x6 : 0000000000000001 [ 47.570997][ T4943] x5 : ffff8000211f6d18 x4 : ffff80001447f520 x3 : ffff800008308360 [ 47.572351][ T4943] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 47.573668][ T4943] Call trace: [ 47.574211][ T4943] btrfs_sync_log+0x13d4/0x1e7c [ 47.574999][ T4943] btrfs_sync_file+0xa2c/0xf2c [ 47.575789][ T4943] vfs_fsync_range+0x168/0x188 [ 47.576648][ T4943] btrfs_file_write_iter+0xa58/0xc18 [ 47.577500][ T4943] vfs_write+0x590/0xa64 [ 47.578168][ T4943] ksys_write+0x12c/0x228 [ 47.578868][ T4943] __arm64_sys_write+0x7c/0x90 [ 47.579658][ T4943] invoke_syscall+0x98/0x28c [ 47.580436][ T4943] el0_svc_common+0x13c/0x258 [ 47.581186][ T4943] do_el0_svc+0x5c/0x140 [ 47.581913][ T4943] el0_svc+0x78/0x1d0 [ 47.582549][ T4943] el0t_64_sync_handler+0xcc/0xe4 [ 47.583339][ T4943] el0t_64_sync+0x1a0/0x1a4 [ 47.584055][ T4943] irq event stamp: 79988 [ 47.584776][ T4943] hardirqs last enabled at (79987): [] __up_console_sem+0xb4/0xfc [ 47.586318][ T4943] hardirqs last disabled at (79988): [] el1_dbg+0x24/0x80 [ 47.587699][ T4943] softirqs last enabled at (79954): [] handle_softirqs+0xa70/0xc14 [ 47.589231][ T4943] softirqs last disabled at (79943): [] __irq_exit_rcu+0x240/0x434 [ 47.590765][ T4943] ---[ end trace 84f9bdcceacb1676 ]--- [ 47.592190][ T4943] BTRFS: error (device loop0) in btrfs_sync_log:3224: errno=-12 Out of memory [ 47.593655][ T4943] BTRFS info (device loop0): forced readonly [ 47.763357][ T4964] loop0: detected capacity change from 0 to 32768 [ 47.766147][ T4964] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4964) [ 47.769947][ T4964] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 47.771518][ T4964] BTRFS info (device loop0): setting nodatacow, compression disabled [ 47.772915][ T4964] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 47.775016][ T4964] BTRFS info (device loop0): trying to use backup root at mount time [ 47.776331][ T4964] BTRFS info (device loop0): metadata ratio 1564 [ 47.777520][ T4964] BTRFS info (device loop0): doing ref verification [ 47.778654][ T4964] BTRFS info (device loop0): force zlib compression, level 3 [ 47.779970][ T4964] BTRFS info (device loop0): turning on flush-on-commit [ 47.781140][ T4964] BTRFS info (device loop0): using free space tree [ 47.782351][ T4964] BTRFS info (device loop0): has skinny extents [ 47.790072][ T4964] BTRFS info (device loop0): enabling ssd optimizations [ 47.795406][ T4964] FAULT_INJECTION: forcing a failure. [ 47.795406][ T4964] name failslab, interval 1, probability 0, space 0, times 0 [ 47.797453][ T4964] CPU: 1 PID: 4964 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 47.798924][ T4964] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 47.800527][ T4964] Call trace: [ 47.801032][ T4964] dump_backtrace+0x0/0x458 [ 47.801797][ T4964] show_stack+0x2c/0x3c [ 47.802494][ T4964] __dump_stack+0x30/0x40 [ 47.803162][ T4964] dump_stack_lvl+0xf4/0x15c [ 47.803872][ T4964] dump_stack+0x1c/0x5c [ 47.804588][ T4964] should_fail+0x3c8/0x520 [ 47.805468][ T4964] __should_failslab+0xbc/0x10c [ 47.806381][ T4964] should_failslab+0x10/0x28 [ 47.807193][ T4964] slab_pre_alloc_hook+0x64/0xe8 [ 47.808089][ T4964] kmem_cache_alloc+0x94/0x3d8 [ 47.809007][ T4964] mempool_alloc_slab+0x58/0x74 [ 47.809950][ T4964] mempool_alloc+0x148/0x3d4 [ 47.810827][ T4964] bio_alloc_bioset+0x118/0x700 [ 47.811668][ T4964] submit_extent_page+0x420/0x1264 [ 47.812584][ T4964] write_one_eb+0x1b8/0x550 [ 47.813363][ T4964] btree_writepages+0xedc/0x153c [ 47.814248][ T4964] do_writepages+0x374/0x588 [ 47.814958][ T4964] filemap_fdatawrite_wbc+0x1d4/0x234 [ 47.815852][ T4964] filemap_fdatawrite_range+0xc0/0x114 [ 47.816767][ T4964] btrfs_write_marked_extents+0x1c0/0x368 [ 47.817665][ T4964] btrfs_sync_log+0x1290/0x1e7c [ 47.818464][ T4964] btrfs_sync_file+0xa2c/0xf2c [ 47.819266][ T4964] vfs_fsync_range+0x168/0x188 [ 47.820047][ T4964] btrfs_file_write_iter+0xa58/0xc18 [ 47.820946][ T4964] vfs_write+0x590/0xa64 [ 47.821596][ T4964] ksys_write+0x12c/0x228 [ 47.822316][ T4964] __arm64_sys_write+0x7c/0x90 [ 47.823082][ T4964] invoke_syscall+0x98/0x28c [ 47.823911][ T4964] el0_svc_common+0x13c/0x258 [ 47.824729][ T4964] do_el0_svc+0x5c/0x140 [ 47.825418][ T4964] el0_svc+0x78/0x1d0 [ 47.826063][ T4964] el0t_64_sync_handler+0xcc/0xe4 [ 47.826914][ T4964] el0t_64_sync+0x1a0/0x1a4 [ 48.011996][ T4985] loop0: detected capacity change from 0 to 32768 [ 48.015405][ T4985] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (4985) [ 48.019861][ T4985] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 48.021471][ T4985] BTRFS info (device loop0): setting nodatacow, compression disabled [ 48.022887][ T4985] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 48.024924][ T4985] BTRFS info (device loop0): trying to use backup root at mount time [ 48.026306][ T4985] BTRFS info (device loop0): metadata ratio 1564 [ 48.027363][ T4985] BTRFS info (device loop0): doing ref verification [ 48.028445][ T4985] BTRFS info (device loop0): force zlib compression, level 3 [ 48.029553][ T4985] BTRFS info (device loop0): turning on flush-on-commit [ 48.030793][ T4985] BTRFS info (device loop0): using free space tree [ 48.032063][ T4985] BTRFS info (device loop0): has skinny extents [ 48.040751][ T4985] BTRFS info (device loop0): enabling ssd optimizations [ 48.046097][ T4985] FAULT_INJECTION: forcing a failure. [ 48.046097][ T4985] name failslab, interval 1, probability 0, space 0, times 0 [ 48.048222][ T4985] CPU: 1 PID: 4985 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.049693][ T4985] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.051331][ T4985] Call trace: [ 48.051880][ T4985] dump_backtrace+0x0/0x458 [ 48.052804][ T4985] show_stack+0x2c/0x3c [ 48.053632][ T4985] __dump_stack+0x30/0x40 [ 48.054475][ T4985] dump_stack_lvl+0xf4/0x15c [ 48.055376][ T4985] dump_stack+0x1c/0x5c [ 48.056204][ T4985] should_fail+0x3c8/0x520 [ 48.057102][ T4985] __should_failslab+0xbc/0x10c [ 48.058115][ T4985] should_failslab+0x10/0x28 [ 48.058969][ T4985] slab_pre_alloc_hook+0x64/0xe8 [ 48.059851][ T4985] kmem_cache_alloc+0x94/0x3d8 [ 48.060642][ T4985] btrfs_insert_item+0xd0/0x2bc [ 48.061439][ T4985] btrfs_insert_root+0xa4/0x14c [ 48.062230][ T4985] btrfs_sync_log+0xb14/0x1e7c [ 48.063040][ T4985] btrfs_sync_file+0xa2c/0xf2c [ 48.063849][ T4985] vfs_fsync_range+0x168/0x188 [ 48.064686][ T4985] btrfs_file_write_iter+0xa58/0xc18 [ 48.065625][ T4985] vfs_write+0x590/0xa64 [ 48.066317][ T4985] ksys_write+0x12c/0x228 [ 48.067069][ T4985] __arm64_sys_write+0x7c/0x90 [ 48.067858][ T4985] invoke_syscall+0x98/0x28c [ 48.068583][ T4985] el0_svc_common+0x13c/0x258 [ 48.069305][ T4985] do_el0_svc+0x5c/0x140 [ 48.070020][ T4985] el0_svc+0x78/0x1d0 [ 48.070698][ T4985] el0t_64_sync_handler+0xcc/0xe4 [ 48.071545][ T4985] el0t_64_sync+0x1a0/0x1a4 [ 48.072499][ T4985] ------------[ cut here ]------------ [ 48.073550][ T4985] WARNING: CPU: 1 PID: 4985 at fs/btrfs/tree-log.c:3224 btrfs_sync_log+0x13d4/0x1e7c [ 48.075261][ T4985] Modules linked in: [ 48.075957][ T4985] CPU: 1 PID: 4985 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.077450][ T4985] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.079084][ T4985] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 48.080460][ T4985] pc : btrfs_sync_log+0x13d4/0x1e7c [ 48.081304][ T4985] lr : btrfs_sync_log+0x13d4/0x1e7c [ 48.082204][ T4985] sp : ffff800021207400 [ 48.082939][ T4985] x29: ffff800021207800 x28: 00000000fffffff4 x27: dfff800000000000 [ 48.084304][ T4985] x26: ffff8000212074c0 x25: ffff0000dd211f20 x24: 1fffe00019e1309d [ 48.085753][ T4985] x23: ffff0000d4f7c4e0 x22: ffff0000d471e000 x21: ffff800021207748 [ 48.087069][ T4985] x20: ffff0000ce26c000 x19: ffff0000dd211f78 x18: 0000000000000000 [ 48.088422][ T4985] x17: 0000000000000000 x16: ffff8000082c67fc x15: 0000000000000000 [ 48.089836][ T4985] x14: 0000000000000001 x13: 1ffff00004240da0 x12: 0000000000000000 [ 48.091296][ T4985] x11: ff80800008300a38 x10: 0000000000000000 x9 : 9e28e5af12166600 [ 48.092672][ T4985] x8 : 9e28e5af12166600 x7 : 0000000000000001 x6 : 0000000000000001 [ 48.094046][ T4985] x5 : ffff800021206d18 x4 : ffff80001447f520 x3 : ffff800008308360 [ 48.095427][ T4985] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 48.096748][ T4985] Call trace: [ 48.097304][ T4985] btrfs_sync_log+0x13d4/0x1e7c [ 48.098131][ T4985] btrfs_sync_file+0xa2c/0xf2c [ 48.098905][ T4985] vfs_fsync_range+0x168/0x188 [ 48.099705][ T4985] btrfs_file_write_iter+0xa58/0xc18 [ 48.100603][ T4985] vfs_write+0x590/0xa64 [ 48.101310][ T4985] ksys_write+0x12c/0x228 [ 48.101994][ T4985] __arm64_sys_write+0x7c/0x90 [ 48.102745][ T4985] invoke_syscall+0x98/0x28c [ 48.103461][ T4985] el0_svc_common+0x13c/0x258 [ 48.104280][ T4985] do_el0_svc+0x5c/0x140 [ 48.104967][ T4985] el0_svc+0x78/0x1d0 [ 48.105613][ T4985] el0t_64_sync_handler+0xcc/0xe4 [ 48.106472][ T4985] el0t_64_sync+0x1a0/0x1a4 [ 48.107240][ T4985] irq event stamp: 80482 [ 48.107924][ T4985] hardirqs last enabled at (80481): [] __up_console_sem+0xb4/0xfc [ 48.109511][ T4985] hardirqs last disabled at (80482): [] el1_dbg+0x24/0x80 [ 48.111080][ T4985] softirqs last enabled at (80456): [] handle_softirqs+0xa70/0xc14 [ 48.112787][ T4985] softirqs last disabled at (80445): [] __irq_exit_rcu+0x240/0x434 [ 48.114375][ T4985] ---[ end trace 84f9bdcceacb1677 ]--- [ 48.115887][ T4985] BTRFS: error (device loop0) in btrfs_sync_log:3224: errno=-12 Out of memory [ 48.117412][ T4985] BTRFS info (device loop0): forced readonly [ 48.330187][ T5006] loop0: detected capacity change from 0 to 32768 [ 48.332832][ T5006] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5006) [ 48.336413][ T5006] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 48.337859][ T5006] BTRFS info (device loop0): setting nodatacow, compression disabled [ 48.339205][ T5006] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 48.340969][ T5006] BTRFS info (device loop0): trying to use backup root at mount time [ 48.342275][ T5006] BTRFS info (device loop0): metadata ratio 1564 [ 48.343283][ T5006] BTRFS info (device loop0): doing ref verification [ 48.344654][ T5006] BTRFS info (device loop0): force zlib compression, level 3 [ 48.345946][ T5006] BTRFS info (device loop0): turning on flush-on-commit [ 48.347154][ T5006] BTRFS info (device loop0): using free space tree [ 48.348406][ T5006] BTRFS info (device loop0): has skinny extents [ 48.357085][ T5006] BTRFS info (device loop0): enabling ssd optimizations [ 48.361690][ T5006] FAULT_INJECTION: forcing a failure. [ 48.361690][ T5006] name failslab, interval 1, probability 0, space 0, times 0 [ 48.363798][ T5006] CPU: 1 PID: 5006 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.365290][ T5006] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.366986][ T5006] Call trace: [ 48.367513][ T5006] dump_backtrace+0x0/0x458 [ 48.368324][ T5006] show_stack+0x2c/0x3c [ 48.368968][ T5006] __dump_stack+0x30/0x40 [ 48.369655][ T5006] dump_stack_lvl+0xf4/0x15c [ 48.370431][ T5006] dump_stack+0x1c/0x5c [ 48.371140][ T5006] should_fail+0x3c8/0x520 [ 48.371920][ T5006] __should_failslab+0xbc/0x10c [ 48.372813][ T5006] should_failslab+0x10/0x28 [ 48.373702][ T5006] slab_pre_alloc_hook+0x64/0xe8 [ 48.374562][ T5006] kmem_cache_alloc+0x94/0x3d8 [ 48.375371][ T5006] mempool_alloc_slab+0x58/0x74 [ 48.376181][ T5006] mempool_alloc+0x148/0x3d4 [ 48.376977][ T5006] bio_alloc_bioset+0x118/0x700 [ 48.377752][ T5006] submit_extent_page+0x420/0x1264 [ 48.378653][ T5006] write_one_eb+0x1b8/0x550 [ 48.379442][ T5006] btree_writepages+0xedc/0x153c [ 48.380226][ T5006] do_writepages+0x374/0x588 [ 48.381010][ T5006] filemap_fdatawrite_wbc+0x1d4/0x234 [ 48.381913][ T5006] filemap_fdatawrite_range+0xc0/0x114 [ 48.382799][ T5006] btrfs_write_marked_extents+0x1c0/0x368 [ 48.383742][ T5006] btrfs_sync_log+0x1290/0x1e7c [ 48.384556][ T5006] btrfs_sync_file+0xa2c/0xf2c [ 48.385374][ T5006] vfs_fsync_range+0x168/0x188 [ 48.386116][ T5006] btrfs_file_write_iter+0xa58/0xc18 [ 48.386989][ T5006] vfs_write+0x590/0xa64 [ 48.387695][ T5006] ksys_write+0x12c/0x228 [ 48.388455][ T5006] __arm64_sys_write+0x7c/0x90 [ 48.389268][ T5006] invoke_syscall+0x98/0x28c [ 48.390107][ T5006] el0_svc_common+0x13c/0x258 [ 48.390886][ T5006] do_el0_svc+0x5c/0x140 [ 48.391660][ T5006] el0_svc+0x78/0x1d0 [ 48.392356][ T5006] el0t_64_sync_handler+0xcc/0xe4 [ 48.393192][ T5006] el0t_64_sync+0x1a0/0x1a4 [ 48.578813][ T5027] loop0: detected capacity change from 0 to 32768 [ 48.581888][ T5027] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5027) [ 48.586429][ T5027] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 48.587979][ T5027] BTRFS info (device loop0): setting nodatacow, compression disabled [ 48.589581][ T5027] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 48.591291][ T5027] BTRFS info (device loop0): trying to use backup root at mount time [ 48.592608][ T5027] BTRFS info (device loop0): metadata ratio 1564 [ 48.593620][ T5027] BTRFS info (device loop0): doing ref verification [ 48.595129][ T5027] BTRFS info (device loop0): force zlib compression, level 3 [ 48.596538][ T5027] BTRFS info (device loop0): turning on flush-on-commit [ 48.597920][ T5027] BTRFS info (device loop0): using free space tree [ 48.599185][ T5027] BTRFS info (device loop0): has skinny extents [ 48.610580][ T5027] BTRFS info (device loop0): enabling ssd optimizations [ 48.616692][ T5027] FAULT_INJECTION: forcing a failure. [ 48.616692][ T5027] name failslab, interval 1, probability 0, space 0, times 0 [ 48.619073][ T5027] CPU: 0 PID: 5027 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.620693][ T5027] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.622472][ T5027] Call trace: [ 48.623031][ T5027] dump_backtrace+0x0/0x458 [ 48.623828][ T5027] show_stack+0x2c/0x3c [ 48.624567][ T5027] __dump_stack+0x30/0x40 [ 48.625295][ T5027] dump_stack_lvl+0xf4/0x15c [ 48.626088][ T5027] dump_stack+0x1c/0x5c [ 48.626819][ T5027] should_fail+0x3c8/0x520 [ 48.627600][ T5027] __should_failslab+0xbc/0x10c [ 48.628454][ T5027] should_failslab+0x10/0x28 [ 48.629287][ T5027] slab_pre_alloc_hook+0x64/0xe8 [ 48.630132][ T5027] kmem_cache_alloc+0x94/0x3d8 [ 48.630991][ T5027] mempool_alloc_slab+0x58/0x74 [ 48.631842][ T5027] mempool_alloc+0x148/0x3d4 [ 48.632659][ T5027] bio_alloc_bioset+0x1d8/0x700 [ 48.633453][ T5027] submit_extent_page+0x420/0x1264 [ 48.634343][ T5027] write_one_eb+0x1b8/0x550 [ 48.635096][ T5027] btree_writepages+0xedc/0x153c [ 48.635977][ T5027] do_writepages+0x374/0x588 [ 48.636792][ T5027] filemap_fdatawrite_wbc+0x1d4/0x234 [ 48.637729][ T5027] filemap_fdatawrite_range+0xc0/0x114 [ 48.638696][ T5027] btrfs_write_marked_extents+0x1c0/0x368 [ 48.639635][ T5027] btrfs_sync_log+0x75c/0x1e7c [ 48.640469][ T5027] btrfs_sync_file+0xa2c/0xf2c [ 48.641309][ T5027] vfs_fsync_range+0x168/0x188 [ 48.642134][ T5027] btrfs_file_write_iter+0xa58/0xc18 [ 48.643085][ T5027] vfs_write+0x590/0xa64 [ 48.643835][ T5027] ksys_write+0x12c/0x228 [ 48.644611][ T5027] __arm64_sys_write+0x7c/0x90 [ 48.645424][ T5027] invoke_syscall+0x98/0x28c [ 48.646220][ T5027] el0_svc_common+0x13c/0x258 [ 48.647027][ T5027] do_el0_svc+0x5c/0x140 [ 48.647782][ T5027] el0_svc+0x78/0x1d0 [ 48.648479][ T5027] el0t_64_sync_handler+0xcc/0xe4 [ 48.649381][ T5027] el0t_64_sync+0x1a0/0x1a4 [ 48.824255][ T4078] Bluetooth: hci0: command 0x0419 tx timeout [ 48.840709][ T5048] loop0: detected capacity change from 0 to 32768 [ 48.843241][ T5048] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5048) [ 48.846596][ T5048] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 48.848319][ T5048] BTRFS info (device loop0): setting nodatacow, compression disabled [ 48.849780][ T5048] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 48.851772][ T5048] BTRFS info (device loop0): trying to use backup root at mount time [ 48.853358][ T5048] BTRFS info (device loop0): metadata ratio 1564 [ 48.854626][ T5048] BTRFS info (device loop0): doing ref verification [ 48.855767][ T5048] BTRFS info (device loop0): force zlib compression, level 3 [ 48.857050][ T5048] BTRFS info (device loop0): turning on flush-on-commit [ 48.858368][ T5048] BTRFS info (device loop0): using free space tree [ 48.859501][ T5048] BTRFS info (device loop0): has skinny extents [ 48.871121][ T5048] BTRFS info (device loop0): enabling ssd optimizations [ 48.876177][ T5048] FAULT_INJECTION: forcing a failure. [ 48.876177][ T5048] name failslab, interval 1, probability 0, space 0, times 0 [ 48.878428][ T5048] CPU: 1 PID: 5048 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 48.879878][ T5048] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 48.881494][ T5048] Call trace: [ 48.881999][ T5048] dump_backtrace+0x0/0x458 [ 48.882772][ T5048] show_stack+0x2c/0x3c [ 48.883473][ T5048] __dump_stack+0x30/0x40 [ 48.884177][ T5048] dump_stack_lvl+0xf4/0x15c [ 48.884930][ T5048] dump_stack+0x1c/0x5c [ 48.885595][ T5048] should_fail+0x3c8/0x520 [ 48.886305][ T5048] __should_failslab+0xbc/0x10c [ 48.887083][ T5048] should_failslab+0x10/0x28 [ 48.887833][ T5048] slab_pre_alloc_hook+0x64/0xe8 [ 48.888618][ T5048] kmem_cache_alloc+0x94/0x3d8 [ 48.889376][ T5048] mempool_alloc_slab+0x58/0x74 [ 48.890143][ T5048] mempool_alloc+0x148/0x3d4 [ 48.890907][ T5048] bio_alloc_bioset+0x118/0x700 [ 48.891710][ T5048] submit_extent_page+0x420/0x1264 [ 48.892528][ T5048] write_one_eb+0x1b8/0x550 [ 48.893329][ T5048] btree_writepages+0xedc/0x153c [ 48.894142][ T5048] do_writepages+0x374/0x588 [ 48.894875][ T5048] filemap_fdatawrite_wbc+0x1d4/0x234 [ 48.895764][ T5048] filemap_fdatawrite_range+0xc0/0x114 [ 48.896648][ T5048] btrfs_write_marked_extents+0x1c0/0x368 [ 48.897598][ T5048] btrfs_sync_log+0x1290/0x1e7c [ 48.898409][ T5048] btrfs_sync_file+0xa2c/0xf2c [ 48.899189][ T5048] vfs_fsync_range+0x168/0x188 [ 48.899999][ T5048] btrfs_file_write_iter+0xa58/0xc18 [ 48.900872][ T5048] vfs_write+0x590/0xa64 [ 48.901650][ T5048] ksys_write+0x12c/0x228 [ 48.902382][ T5048] __arm64_sys_write+0x7c/0x90 [ 48.903166][ T5048] invoke_syscall+0x98/0x28c [ 48.903920][ T5048] el0_svc_common+0x13c/0x258 [ 48.904657][ T5048] do_el0_svc+0x5c/0x140 [ 48.905322][ T5048] el0_svc+0x78/0x1d0 [ 48.906062][ T5048] el0t_64_sync_handler+0xcc/0xe4 [ 48.906967][ T5048] el0t_64_sync+0x1a0/0x1a4 [ 49.111052][ T5069] loop0: detected capacity change from 0 to 32768 [ 49.115253][ T5069] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5069) [ 49.118735][ T5069] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 49.120437][ T5069] BTRFS info (device loop0): setting nodatacow, compression disabled [ 49.121872][ T5069] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 49.123801][ T5069] BTRFS info (device loop0): trying to use backup root at mount time [ 49.125314][ T5069] BTRFS info (device loop0): metadata ratio 1564 [ 49.126568][ T5069] BTRFS info (device loop0): doing ref verification [ 49.127773][ T5069] BTRFS info (device loop0): force zlib compression, level 3 [ 49.129094][ T5069] BTRFS info (device loop0): turning on flush-on-commit [ 49.130378][ T5069] BTRFS info (device loop0): using free space tree [ 49.131656][ T5069] BTRFS info (device loop0): has skinny extents [ 49.144024][ T5069] BTRFS info (device loop0): enabling ssd optimizations [ 49.149642][ T5069] FAULT_INJECTION: forcing a failure. [ 49.149642][ T5069] name failslab, interval 1, probability 0, space 0, times 0 [ 49.152000][ T5069] CPU: 1 PID: 5069 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.153446][ T5069] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.155191][ T5069] Call trace: [ 49.155770][ T5069] dump_backtrace+0x0/0x458 [ 49.156586][ T5069] show_stack+0x2c/0x3c [ 49.157323][ T5069] __dump_stack+0x30/0x40 [ 49.158099][ T5069] dump_stack_lvl+0xf4/0x15c [ 49.158858][ T5069] dump_stack+0x1c/0x5c [ 49.159591][ T5069] should_fail+0x3c8/0x520 [ 49.160457][ T5069] __should_failslab+0xbc/0x10c [ 49.161329][ T5069] should_failslab+0x10/0x28 [ 49.162151][ T5069] slab_pre_alloc_hook+0x64/0xe8 [ 49.162963][ T5069] kmem_cache_alloc+0x94/0x3d8 [ 49.163734][ T5069] mempool_alloc_slab+0x58/0x74 [ 49.164591][ T5069] mempool_alloc+0x148/0x3d4 [ 49.165359][ T5069] bio_alloc_bioset+0x118/0x700 [ 49.166187][ T5069] submit_extent_page+0x420/0x1264 [ 49.167032][ T5069] write_one_eb+0x1b8/0x550 [ 49.167772][ T5069] btree_writepages+0xedc/0x153c [ 49.168568][ T5069] do_writepages+0x374/0x588 [ 49.169302][ T5069] filemap_fdatawrite_wbc+0x1d4/0x234 [ 49.170190][ T5069] filemap_fdatawrite_range+0xc0/0x114 [ 49.171120][ T5069] btrfs_write_marked_extents+0x1c0/0x368 [ 49.172122][ T5069] btrfs_sync_log+0x1290/0x1e7c [ 49.172941][ T5069] btrfs_sync_file+0xa2c/0xf2c [ 49.173751][ T5069] vfs_fsync_range+0x168/0x188 [ 49.174588][ T5069] btrfs_file_write_iter+0xa58/0xc18 [ 49.175483][ T5069] vfs_write+0x590/0xa64 [ 49.176201][ T5069] ksys_write+0x12c/0x228 [ 49.177002][ T5069] __arm64_sys_write+0x7c/0x90 [ 49.177880][ T5069] invoke_syscall+0x98/0x28c [ 49.178668][ T5069] el0_svc_common+0x13c/0x258 [ 49.179512][ T5069] do_el0_svc+0x5c/0x140 [ 49.180231][ T5069] el0_svc+0x78/0x1d0 [ 49.180915][ T5069] el0t_64_sync_handler+0xcc/0xe4 [ 49.181714][ T5069] el0t_64_sync+0x1a0/0x1a4 [ 49.373254][ T5090] loop0: detected capacity change from 0 to 32768 [ 49.384325][ T5090] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5090) [ 49.389273][ T5090] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 49.390926][ T5090] BTRFS info (device loop0): setting nodatacow, compression disabled [ 49.392287][ T5090] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 49.394126][ T5090] BTRFS info (device loop0): trying to use backup root at mount time [ 49.395716][ T5090] BTRFS info (device loop0): metadata ratio 1564 [ 49.396951][ T5090] BTRFS info (device loop0): doing ref verification [ 49.398192][ T5090] BTRFS info (device loop0): force zlib compression, level 3 [ 49.399520][ T5090] BTRFS info (device loop0): turning on flush-on-commit [ 49.400866][ T5090] BTRFS info (device loop0): using free space tree [ 49.412509][ T5090] FAULT_INJECTION: forcing a failure. [ 49.412509][ T5090] name failslab, interval 1, probability 0, space 0, times 0 [ 49.414743][ T5090] CPU: 1 PID: 5090 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.416296][ T5090] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.418093][ T5090] Call trace: [ 49.418697][ T5090] dump_backtrace+0x0/0x458 [ 49.419508][ T5090] show_stack+0x2c/0x3c [ 49.420243][ T5090] __dump_stack+0x30/0x40 [ 49.420976][ T5090] dump_stack_lvl+0xf4/0x15c [ 49.421797][ T5090] dump_stack+0x1c/0x5c [ 49.422511][ T5090] should_fail+0x3c8/0x520 [ 49.423260][ T5090] __should_failslab+0xbc/0x10c [ 49.424025][ T5090] should_failslab+0x10/0x28 [ 49.424742][ T5090] slab_pre_alloc_hook+0x64/0xe8 [ 49.425573][ T5090] kmem_cache_alloc+0x94/0x3d8 [ 49.426411][ T5090] alloc_extent_state+0x38/0x434 [ 49.427286][ T5090] convert_extent_bit+0x188/0x171c [ 49.428137][ T5090] btrfs_write_marked_extents+0x17c/0x368 [ 49.429080][ T5090] btrfs_sync_log+0x1290/0x1e7c [ 49.429905][ T5090] btrfs_sync_file+0xa2c/0xf2c [ 49.430709][ T5090] vfs_fsync_range+0x168/0x188 [ 49.431465][ T5090] btrfs_file_write_iter+0xa58/0xc18 [ 49.432332][ T5090] vfs_write+0x590/0xa64 [ 49.433088][ T5090] ksys_write+0x12c/0x228 [ 49.433827][ T5090] __arm64_sys_write+0x7c/0x90 [ 49.434667][ T5090] invoke_syscall+0x98/0x28c [ 49.435455][ T5090] el0_svc_common+0x13c/0x258 [ 49.436216][ T5090] do_el0_svc+0x5c/0x140 [ 49.436905][ T5090] el0_svc+0x78/0x1d0 [ 49.437562][ T5090] el0t_64_sync_handler+0xcc/0xe4 [ 49.438414][ T5090] el0t_64_sync+0x1a0/0x1a4 [ 49.611397][ T5111] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5111) [ 49.619680][ T5111] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 49.641931][ T5111] FAULT_INJECTION: forcing a failure. [ 49.641931][ T5111] name failslab, interval 1, probability 0, space 0, times 0 [ 49.644062][ T5111] CPU: 1 PID: 5111 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.645716][ T5111] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.647364][ T5111] Call trace: [ 49.647887][ T5111] dump_backtrace+0x0/0x458 [ 49.648653][ T5111] show_stack+0x2c/0x3c [ 49.649384][ T5111] __dump_stack+0x30/0x40 [ 49.650109][ T5111] dump_stack_lvl+0xf4/0x15c [ 49.651046][ T5111] dump_stack+0x1c/0x5c [ 49.651837][ T5111] should_fail+0x3c8/0x520 [ 49.652714][ T5111] __should_failslab+0xbc/0x10c [ 49.653605][ T5111] should_failslab+0x10/0x28 [ 49.654440][ T5111] slab_pre_alloc_hook+0x64/0xe8 [ 49.655397][ T5111] kmem_cache_alloc+0x94/0x3d8 [ 49.656289][ T5111] btrfs_insert_item+0xd0/0x2bc [ 49.657203][ T5111] btrfs_insert_root+0xa4/0x14c [ 49.658074][ T5111] btrfs_sync_log+0xb14/0x1e7c [ 49.658888][ T5111] btrfs_sync_file+0xa2c/0xf2c [ 49.659644][ T5111] vfs_fsync_range+0x168/0x188 [ 49.660453][ T5111] btrfs_file_write_iter+0xa58/0xc18 [ 49.661324][ T5111] vfs_write+0x590/0xa64 [ 49.662037][ T5111] ksys_write+0x12c/0x228 [ 49.662773][ T5111] __arm64_sys_write+0x7c/0x90 [ 49.663593][ T5111] invoke_syscall+0x98/0x28c [ 49.664387][ T5111] el0_svc_common+0x13c/0x258 [ 49.665145][ T5111] do_el0_svc+0x5c/0x140 [ 49.665843][ T5111] el0_svc+0x78/0x1d0 [ 49.666450][ T5111] el0t_64_sync_handler+0xcc/0xe4 [ 49.667274][ T5111] el0t_64_sync+0x1a0/0x1a4 [ 49.668747][ T5111] ------------[ cut here ]------------ [ 49.669802][ T5111] WARNING: CPU: 1 PID: 5111 at fs/btrfs/tree-log.c:3224 btrfs_sync_log+0x13d4/0x1e7c [ 49.671309][ T5111] Modules linked in: [ 49.671977][ T5111] CPU: 1 PID: 5111 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.673526][ T5111] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.675299][ T5111] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 49.676580][ T5111] pc : btrfs_sync_log+0x13d4/0x1e7c [ 49.677395][ T5111] lr : btrfs_sync_log+0x13d4/0x1e7c [ 49.678256][ T5111] sp : ffff800021567400 [ 49.678952][ T5111] x29: ffff800021567800 x28: 00000000fffffff4 x27: dfff800000000000 [ 49.680340][ T5111] x26: ffff8000215674c0 x25: ffff0000ded3da50 x24: 1fffe0001b01e49d [ 49.681722][ T5111] x23: ffff0000c78984e0 x22: ffff0000d80f0000 x21: ffff800021567748 [ 49.683061][ T5111] x20: ffff0000d726a000 x19: ffff0000ded3daa8 x18: 0000000000000000 [ 49.684420][ T5111] x17: 0000000000000000 x16: ffff80001135f958 x15: 0000000000000000 [ 49.685796][ T5111] x14: 0000000000000001 x13: 1fffe000341d09ab x12: 0000000000000000 [ 49.687116][ T5111] x11: ff80800008300a38 x10: 0000000000000000 x9 : a0e00f07abfbaa00 [ 49.688520][ T5111] x8 : a0e00f07abfbaa00 x7 : 0000000000000001 x6 : 0000000000000001 [ 49.689854][ T5111] x5 : ffff800021566d18 x4 : ffff80001447f520 x3 : ffff80000850fcd0 [ 49.691243][ T5111] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 49.692515][ T5111] Call trace: [ 49.693018][ T5111] btrfs_sync_log+0x13d4/0x1e7c [ 49.693832][ T5111] btrfs_sync_file+0xa2c/0xf2c [ 49.694594][ T5111] vfs_fsync_range+0x168/0x188 [ 49.695308][ T5111] btrfs_file_write_iter+0xa58/0xc18 [ 49.696229][ T5111] vfs_write+0x590/0xa64 [ 49.697028][ T5111] ksys_write+0x12c/0x228 [ 49.697885][ T5111] __arm64_sys_write+0x7c/0x90 [ 49.698811][ T5111] invoke_syscall+0x98/0x28c [ 49.699760][ T5111] el0_svc_common+0x13c/0x258 [ 49.700555][ T5111] do_el0_svc+0x5c/0x140 [ 49.701287][ T5111] el0_svc+0x78/0x1d0 [ 49.702022][ T5111] el0t_64_sync_handler+0xcc/0xe4 [ 49.702996][ T5111] el0t_64_sync+0x1a0/0x1a4 [ 49.703814][ T5111] irq event stamp: 81276 [ 49.704498][ T5111] hardirqs last enabled at (81275): [] __up_console_sem+0xb4/0xfc [ 49.706081][ T5111] hardirqs last disabled at (81276): [] el1_dbg+0x24/0x80 [ 49.707487][ T5111] softirqs last enabled at (81246): [] handle_softirqs+0xa70/0xc14 [ 49.709049][ T5111] softirqs last disabled at (81153): [] __irq_exit_rcu+0x240/0x434 [ 49.710571][ T5111] ---[ end trace 84f9bdcceacb1678 ]--- [ 49.711684][ T5111] BTRFS: error (device loop0) in btrfs_sync_log:3224: errno=-12 Out of memory [ 49.893589][ T5132] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5132) [ 49.897366][ T5132] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 49.910431][ T5132] FAULT_INJECTION: forcing a failure. [ 49.910431][ T5132] name failslab, interval 1, probability 0, space 0, times 0 [ 49.912824][ T5132] CPU: 1 PID: 5132 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.914543][ T5132] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.916462][ T5132] Call trace: [ 49.917059][ T5132] dump_backtrace+0x0/0x458 [ 49.917867][ T5132] show_stack+0x2c/0x3c [ 49.918620][ T5132] __dump_stack+0x30/0x40 [ 49.919390][ T5132] dump_stack_lvl+0xf4/0x15c [ 49.920186][ T5132] dump_stack+0x1c/0x5c [ 49.920886][ T5132] should_fail+0x3c8/0x520 [ 49.921600][ T5132] __should_failslab+0xbc/0x10c [ 49.922370][ T5132] should_failslab+0x10/0x28 [ 49.923059][ T5132] slab_pre_alloc_hook+0x64/0xe8 [ 49.923860][ T5132] kmem_cache_alloc+0x94/0x3d8 [ 49.924620][ T5132] btrfs_insert_item+0xd0/0x2bc [ 49.925383][ T5132] btrfs_insert_root+0xa4/0x14c [ 49.926166][ T5132] btrfs_sync_log+0xb14/0x1e7c [ 49.926979][ T5132] btrfs_sync_file+0xa2c/0xf2c [ 49.927745][ T5132] vfs_fsync_range+0x168/0x188 [ 49.928530][ T5132] btrfs_file_write_iter+0xa58/0xc18 [ 49.929404][ T5132] vfs_write+0x590/0xa64 [ 49.930117][ T5132] ksys_write+0x12c/0x228 [ 49.930846][ T5132] __arm64_sys_write+0x7c/0x90 [ 49.931682][ T5132] invoke_syscall+0x98/0x28c [ 49.932432][ T5132] el0_svc_common+0x13c/0x258 [ 49.933223][ T5132] do_el0_svc+0x5c/0x140 [ 49.933929][ T5132] el0_svc+0x78/0x1d0 [ 49.934621][ T5132] el0t_64_sync_handler+0xcc/0xe4 [ 49.935430][ T5132] el0t_64_sync+0x1a0/0x1a4 [ 49.936422][ T5132] ------------[ cut here ]------------ [ 49.937442][ T5132] WARNING: CPU: 1 PID: 5132 at fs/btrfs/tree-log.c:3224 btrfs_sync_log+0x13d4/0x1e7c [ 49.938915][ T5132] Modules linked in: [ 49.939545][ T5132] CPU: 1 PID: 5132 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 49.941018][ T5132] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 49.942685][ T5132] pstate: 62400005 (nZCv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--) [ 49.944090][ T5132] pc : btrfs_sync_log+0x13d4/0x1e7c [ 49.944975][ T5132] lr : btrfs_sync_log+0x13d4/0x1e7c [ 49.945860][ T5132] sp : ffff800021567400 [ 49.946522][ T5132] x29: ffff800021567800 x28: 00000000fffffff4 x27: dfff800000000000 [ 49.947851][ T5132] x26: ffff8000215674c0 x25: ffff0000ded3dd10 x24: 1fffe0001b04949d [ 49.949174][ T5132] x23: ffff0000d9b704e0 x22: ffff0000d824c000 x21: ffff800021567748 [ 49.950580][ T5132] x20: ffff0000e50b6000 x19: ffff0000ded3dd68 x18: 0000000000000000 [ 49.951932][ T5132] x17: 0000000000000000 x16: ffff8000082c67fc x15: 0000000000000000 [ 49.953274][ T5132] x14: 0000000000000001 x13: 1ffff000042acda0 x12: 0000000000000000 [ 49.954677][ T5132] x11: ff80800008300a38 x10: 0000000000000000 x9 : d0ec5eabdaf07e00 [ 49.955941][ T5132] x8 : d0ec5eabdaf07e00 x7 : 0000000000000001 x6 : 0000000000000001 [ 49.957249][ T5132] x5 : ffff800021566d18 x4 : ffff80001447f520 x3 : ffff800008308360 [ 49.958497][ T5132] x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000026 [ 49.959736][ T5132] Call trace: [ 49.960272][ T5132] btrfs_sync_log+0x13d4/0x1e7c [ 49.961077][ T5132] btrfs_sync_file+0xa2c/0xf2c [ 49.961834][ T5132] vfs_fsync_range+0x168/0x188 [ 49.962592][ T5132] btrfs_file_write_iter+0xa58/0xc18 [ 49.963448][ T5132] vfs_write+0x590/0xa64 [ 49.964122][ T5132] ksys_write+0x12c/0x228 [ 49.964852][ T5132] __arm64_sys_write+0x7c/0x90 [ 49.965605][ T5132] invoke_syscall+0x98/0x28c [ 49.966356][ T5132] el0_svc_common+0x13c/0x258 [ 49.967121][ T5132] do_el0_svc+0x5c/0x140 [ 49.967855][ T5132] el0_svc+0x78/0x1d0 [ 49.968483][ T5132] el0t_64_sync_handler+0xcc/0xe4 [ 49.969326][ T5132] el0t_64_sync+0x1a0/0x1a4 [ 49.970122][ T5132] irq event stamp: 79664 [ 49.970802][ T5132] hardirqs last enabled at (79663): [] __up_console_sem+0xb4/0xfc [ 49.972419][ T5132] hardirqs last disabled at (79664): [] el1_dbg+0x24/0x80 [ 49.973862][ T5132] softirqs last enabled at (79638): [] handle_softirqs+0xa70/0xc14 [ 49.975513][ T5132] softirqs last disabled at (79555): [] __irq_exit_rcu+0x240/0x434 [ 49.977108][ T5132] ---[ end trace 84f9bdcceacb1679 ]--- [ 49.978144][ T5132] BTRFS: error (device loop0) in btrfs_sync_log:3224: errno=-12 Out of memory [ 50.166873][ T5153] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5153) [ 50.171458][ T5153] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 50.196725][ T5153] FAULT_INJECTION: forcing a failure. [ 50.196725][ T5153] name failslab, interval 1, probability 0, space 0, times 0 [ 50.199011][ T5153] CPU: 0 PID: 5153 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 50.200616][ T5153] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 50.202456][ T5153] Call trace: [ 50.203057][ T5153] dump_backtrace+0x0/0x458 [ 50.203831][ T5153] show_stack+0x2c/0x3c [ 50.204595][ T5153] __dump_stack+0x30/0x40 [ 50.205432][ T5153] dump_stack_lvl+0xf4/0x15c [ 50.206254][ T5153] dump_stack+0x1c/0x5c [ 50.206981][ T5153] should_fail+0x3c8/0x520 [ 50.207686][ T5153] __should_failslab+0xbc/0x10c [ 50.208553][ T5153] should_failslab+0x10/0x28 [ 50.209423][ T5153] slab_pre_alloc_hook+0x64/0xe8 [ 50.210266][ T5153] kmem_cache_alloc+0x94/0x3d8 [ 50.211116][ T5153] mempool_alloc_slab+0x58/0x74 [ 50.211956][ T5153] mempool_alloc+0x148/0x3d4 [ 50.212767][ T5153] bio_alloc_bioset+0x118/0x700 [ 50.213595][ T5153] submit_extent_page+0x420/0x1264 [ 50.214446][ T5153] write_one_eb+0x1b8/0x550 [ 50.215191][ T5153] btree_writepages+0xedc/0x153c [ 50.216032][ T5153] do_writepages+0x374/0x588 [ 50.216839][ T5153] filemap_fdatawrite_wbc+0x1d4/0x234 [ 50.217803][ T5153] filemap_fdatawrite_range+0xc0/0x114 [ 50.218816][ T5153] btrfs_write_marked_extents+0x1c0/0x368 [ 50.219861][ T5153] btrfs_sync_log+0x1290/0x1e7c [ 50.220715][ T5153] btrfs_sync_file+0xa2c/0xf2c [ 50.221529][ T5153] vfs_fsync_range+0x168/0x188 [ 50.222394][ T5153] btrfs_file_write_iter+0xa58/0xc18 [ 50.223258][ T5153] vfs_write+0x590/0xa64 [ 50.224038][ T5153] ksys_write+0x12c/0x228 [ 50.224737][ T5153] __arm64_sys_write+0x7c/0x90 [ 50.225542][ T5153] invoke_syscall+0x98/0x28c [ 50.226315][ T5153] el0_svc_common+0x13c/0x258 [ 50.227148][ T5153] do_el0_svc+0x5c/0x140 [ 50.227862][ T5153] el0_svc+0x78/0x1d0 [ 50.228522][ T5153] el0t_64_sync_handler+0xcc/0xe4 [ 50.229380][ T5153] el0t_64_sync+0x1a0/0x1a4 [ 50.426244][ T5174] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5174) [ 50.431393][ T5174] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 50.453042][ T5174] FAULT_INJECTION: forcing a failure. [ 50.453042][ T5174] name failslab, interval 1, probability 0, space 0, times 0 [ 50.455452][ T5174] CPU: 1 PID: 5174 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 50.456994][ T5174] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 50.458599][ T5174] Call trace: [ 50.459128][ T5174] dump_backtrace+0x0/0x458 [ 50.459886][ T5174] show_stack+0x2c/0x3c [ 50.460722][ T5174] __dump_stack+0x30/0x40 [ 50.461436][ T5174] dump_stack_lvl+0xf4/0x15c [ 50.462181][ T5174] dump_stack+0x1c/0x5c [ 50.462882][ T5174] should_fail+0x3c8/0x520 [ 50.463628][ T5174] __should_failslab+0xbc/0x10c [ 50.464450][ T5174] should_failslab+0x10/0x28 [ 50.465264][ T5174] slab_pre_alloc_hook+0x64/0xe8 [ 50.466148][ T5174] kmem_cache_alloc+0x94/0x3d8 [ 50.466971][ T5174] mempool_alloc_slab+0x58/0x74 [ 50.467822][ T5174] mempool_alloc+0x148/0x3d4 [ 50.468638][ T5174] bio_alloc_bioset+0x118/0x700 [ 50.469463][ T5174] submit_extent_page+0x420/0x1264 [ 50.470311][ T5174] write_one_eb+0x1b8/0x550 [ 50.471038][ T5174] btree_writepages+0xedc/0x153c [ 50.471884][ T5174] do_writepages+0x374/0x588 [ 50.472659][ T5174] filemap_fdatawrite_wbc+0x1d4/0x234 [ 50.473586][ T5174] filemap_fdatawrite_range+0xc0/0x114 [ 50.474523][ T5174] btrfs_write_marked_extents+0x1c0/0x368 [ 50.475499][ T5174] btrfs_sync_log+0x1290/0x1e7c [ 50.476333][ T5174] btrfs_sync_file+0xa2c/0xf2c [ 50.477138][ T5174] vfs_fsync_range+0x168/0x188 [ 50.477919][ T5174] btrfs_file_write_iter+0xa58/0xc18 [ 50.478810][ T5174] vfs_write+0x590/0xa64 [ 50.479515][ T5174] ksys_write+0x12c/0x228 [ 50.480256][ T5174] __arm64_sys_write+0x7c/0x90 [ 50.481057][ T5174] invoke_syscall+0x98/0x28c [ 50.481830][ T5174] el0_svc_common+0x13c/0x258 [ 50.482648][ T5174] do_el0_svc+0x5c/0x140 [ 50.483364][ T5174] el0_svc+0x78/0x1d0 [ 50.484002][ T5174] el0t_64_sync_handler+0xcc/0xe4 [ 50.484878][ T5174] el0t_64_sync+0x1a0/0x1a4 [ 50.691226][ T5195] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5195) [ 50.695436][ T5195] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 50.710212][ T5195] FAULT_INJECTION: forcing a failure. [ 50.710212][ T5195] name failslab, interval 1, probability 0, space 0, times 0 [ 50.712422][ T5195] CPU: 0 PID: 5195 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 50.713875][ T5195] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 50.715632][ T5195] Call trace: [ 50.716189][ T5195] dump_backtrace+0x0/0x458 [ 50.716945][ T5195] show_stack+0x2c/0x3c [ 50.717649][ T5195] __dump_stack+0x30/0x40 [ 50.718344][ T5195] dump_stack_lvl+0xf4/0x15c [ 50.719112][ T5195] dump_stack+0x1c/0x5c [ 50.719793][ T5195] should_fail+0x3c8/0x520 [ 50.720538][ T5195] __should_failslab+0xbc/0x10c [ 50.721347][ T5195] should_failslab+0x10/0x28 [ 50.722138][ T5195] slab_pre_alloc_hook+0x64/0xe8 [ 50.722921][ T5195] kmem_cache_alloc+0x94/0x3d8 [ 50.723688][ T5195] alloc_extent_state+0x38/0x434 [ 50.724590][ T5195] convert_extent_bit+0x188/0x171c [ 50.725574][ T5195] btrfs_write_marked_extents+0x17c/0x368 [ 50.726584][ T5195] btrfs_sync_log+0x1290/0x1e7c [ 50.727399][ T5195] btrfs_sync_file+0xa2c/0xf2c [ 50.728204][ T5195] vfs_fsync_range+0x168/0x188 [ 50.729048][ T5195] btrfs_file_write_iter+0xa58/0xc18 [ 50.730002][ T5195] vfs_write+0x590/0xa64 [ 50.730667][ T5195] ksys_write+0x12c/0x228 [ 50.731386][ T5195] __arm64_sys_write+0x7c/0x90 [ 50.732210][ T5195] invoke_syscall+0x98/0x28c [ 50.732945][ T5195] el0_svc_common+0x13c/0x258 [ 50.733741][ T5195] do_el0_svc+0x5c/0x140 [ 50.734442][ T5195] el0_svc+0x78/0x1d0 [ 50.735089][ T5195] el0t_64_sync_handler+0xcc/0xe4 [ 50.735941][ T5195] el0t_64_sync+0x1a0/0x1a4 1970/01/01 00:00:50 executed programs: 32 [ 50.924594][ T5216] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5216) [ 50.930076][ T5216] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 50.957291][ T5216] FAULT_INJECTION: forcing a failure. [ 50.957291][ T5216] name failslab, interval 1, probability 0, space 0, times 0 [ 50.959637][ T5216] CPU: 0 PID: 5216 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 50.961181][ T5216] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 50.962812][ T5216] Call trace: [ 50.963347][ T5216] dump_backtrace+0x0/0x458 [ 50.964192][ T5216] show_stack+0x2c/0x3c [ 50.964968][ T5216] __dump_stack+0x30/0x40 [ 50.965762][ T5216] dump_stack_lvl+0xf4/0x15c [ 50.966595][ T5216] dump_stack+0x1c/0x5c [ 50.967389][ T5216] should_fail+0x3c8/0x520 [ 50.968233][ T5216] __should_failslab+0xbc/0x10c [ 50.969147][ T5216] should_failslab+0x10/0x28 [ 50.969910][ T5216] slab_pre_alloc_hook+0x64/0xe8 [ 50.970757][ T5216] kmem_cache_alloc+0x94/0x3d8 [ 50.971562][ T5216] mempool_alloc_slab+0x58/0x74 [ 50.972429][ T5216] mempool_alloc+0x148/0x3d4 [ 50.973194][ T5216] bio_alloc_bioset+0x118/0x700 [ 50.974017][ T5216] submit_extent_page+0x420/0x1264 [ 50.974879][ T5216] write_one_eb+0x1b8/0x550 [ 50.975653][ T5216] btree_writepages+0xedc/0x153c [ 50.976494][ T5216] do_writepages+0x374/0x588 [ 50.977246][ T5216] filemap_fdatawrite_wbc+0x1d4/0x234 [ 50.978092][ T5216] filemap_fdatawrite_range+0xc0/0x114 [ 50.978952][ T5216] btrfs_write_marked_extents+0x1c0/0x368 [ 50.979954][ T5216] btrfs_sync_log+0x1290/0x1e7c [ 50.980851][ T5216] btrfs_sync_file+0xa2c/0xf2c [ 50.981601][ T5216] vfs_fsync_range+0x168/0x188 [ 50.982445][ T5216] btrfs_file_write_iter+0xa58/0xc18 [ 50.983393][ T5216] vfs_write+0x590/0xa64 [ 50.984093][ T5216] ksys_write+0x12c/0x228 [ 50.984820][ T5216] __arm64_sys_write+0x7c/0x90 [ 50.985586][ T5216] invoke_syscall+0x98/0x28c [ 50.986342][ T5216] el0_svc_common+0x13c/0x258 [ 50.987129][ T5216] do_el0_svc+0x5c/0x140 [ 50.987877][ T5216] el0_svc+0x78/0x1d0 [ 50.988578][ T5216] el0t_64_sync_handler+0xcc/0xe4 [ 50.989369][ T5216] el0t_64_sync+0x1a0/0x1a4 [ 51.187884][ T5237] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5237) [ 51.192126][ T5237] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 51.211924][ T5237] FAULT_INJECTION: forcing a failure. [ 51.211924][ T5237] name failslab, interval 1, probability 0, space 0, times 0 [ 51.214415][ T5237] CPU: 1 PID: 5237 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 51.215902][ T5237] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 51.217658][ T5237] Call trace: [ 51.218191][ T5237] dump_backtrace+0x0/0x458 [ 51.219000][ T5237] show_stack+0x2c/0x3c [ 51.219687][ T5237] __dump_stack+0x30/0x40 [ 51.220419][ T5237] dump_stack_lvl+0xf4/0x15c [ 51.221188][ T5237] dump_stack+0x1c/0x5c [ 51.221908][ T5237] should_fail+0x3c8/0x520 [ 51.222740][ T5237] __should_failslab+0xbc/0x10c [ 51.223593][ T5237] should_failslab+0x10/0x28 [ 51.224371][ T5237] slab_pre_alloc_hook+0x64/0xe8 [ 51.225199][ T5237] kmem_cache_alloc+0x94/0x3d8 [ 51.225974][ T5237] mempool_alloc_slab+0x58/0x74 [ 51.226846][ T5237] mempool_alloc+0x148/0x3d4 [ 51.227603][ T5237] bio_alloc_bioset+0x118/0x700 [ 51.228419][ T5237] submit_extent_page+0x420/0x1264 [ 51.229335][ T5237] write_one_eb+0x1b8/0x550 [ 51.230095][ T5237] btree_writepages+0xedc/0x153c [ 51.230875][ T5237] do_writepages+0x374/0x588 [ 51.231576][ T5237] filemap_fdatawrite_wbc+0x1d4/0x234 [ 51.232444][ T5237] filemap_fdatawrite_range+0xc0/0x114 [ 51.233337][ T5237] btrfs_write_marked_extents+0x1c0/0x368 [ 51.234301][ T5237] btrfs_sync_log+0x1290/0x1e7c [ 51.235132][ T5237] btrfs_sync_file+0xa2c/0xf2c [ 51.235919][ T5237] vfs_fsync_range+0x168/0x188 [ 51.236674][ T5237] btrfs_file_write_iter+0xa58/0xc18 [ 51.237546][ T5237] vfs_write+0x590/0xa64 [ 51.238251][ T5237] ksys_write+0x12c/0x228 [ 51.238944][ T5237] __arm64_sys_write+0x7c/0x90 [ 51.239737][ T5237] invoke_syscall+0x98/0x28c [ 51.240484][ T5237] el0_svc_common+0x13c/0x258 [ 51.241269][ T5237] do_el0_svc+0x5c/0x140 [ 51.241999][ T5237] el0_svc+0x78/0x1d0 [ 51.242645][ T5237] el0t_64_sync_handler+0xcc/0xe4 [ 51.243440][ T5237] el0t_64_sync+0x1a0/0x1a4 [ 51.452423][ T5258] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5258) [ 51.462291][ T5258] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 51.501364][ T5258] FAULT_INJECTION: forcing a failure. [ 51.501364][ T5258] name failslab, interval 1, probability 0, space 0, times 0 [ 51.503629][ T5258] CPU: 0 PID: 5258 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 51.505322][ T5258] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 51.507242][ T5258] Call trace: [ 51.507868][ T5258] dump_backtrace+0x0/0x458 [ 51.508715][ T5258] show_stack+0x2c/0x3c [ 51.509519][ T5258] __dump_stack+0x30/0x40 [ 51.510253][ T5258] dump_stack_lvl+0xf4/0x15c [ 51.511001][ T5258] dump_stack+0x1c/0x5c [ 51.511695][ T5258] should_fail+0x3c8/0x520 [ 51.512427][ T5258] __should_failslab+0xbc/0x10c [ 51.513185][ T5258] should_failslab+0x10/0x28 [ 51.513955][ T5258] slab_pre_alloc_hook+0x64/0xe8 [ 51.514811][ T5258] kmem_cache_alloc+0x94/0x3d8 [ 51.515648][ T5258] mempool_alloc_slab+0x58/0x74 [ 51.516489][ T5258] mempool_alloc+0x148/0x3d4 [ 51.517222][ T5258] bio_alloc_bioset+0x118/0x700 [ 51.518022][ T5258] submit_extent_page+0x420/0x1264 [ 51.518830][ T5258] write_one_eb+0x1b8/0x550 [ 51.519570][ T5258] btree_writepages+0xedc/0x153c [ 51.520403][ T5258] do_writepages+0x374/0x588 [ 51.521165][ T5258] filemap_fdatawrite_wbc+0x1d4/0x234 [ 51.522055][ T5258] filemap_fdatawrite_range+0xc0/0x114 [ 51.522997][ T5258] btrfs_write_marked_extents+0x1c0/0x368 [ 51.523910][ T5258] btrfs_sync_log+0x1290/0x1e7c [ 51.524726][ T5258] btrfs_sync_file+0xa2c/0xf2c [ 51.525558][ T5258] vfs_fsync_range+0x168/0x188 [ 51.526363][ T5258] btrfs_file_write_iter+0xa58/0xc18 [ 51.527264][ T5258] vfs_write+0x590/0xa64 [ 51.527968][ T5258] ksys_write+0x12c/0x228 [ 51.528673][ T5258] __arm64_sys_write+0x7c/0x90 [ 51.529441][ T5258] invoke_syscall+0x98/0x28c [ 51.530190][ T5258] el0_svc_common+0x13c/0x258 [ 51.530962][ T5258] do_el0_svc+0x5c/0x140 [ 51.531639][ T5258] el0_svc+0x78/0x1d0 [ 51.532239][ T5258] el0t_64_sync_handler+0xcc/0xe4 [ 51.533089][ T5258] el0t_64_sync+0x1a0/0x1a4 [ 51.730635][ T5279] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5279) [ 51.735057][ T5279] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 51.752862][ T5279] FAULT_INJECTION: forcing a failure. [ 51.752862][ T5279] name failslab, interval 1, probability 0, space 0, times 0 [ 51.755334][ T5279] CPU: 1 PID: 5279 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 51.756998][ T5279] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 51.758791][ T5279] Call trace: [ 51.759472][ T5279] dump_backtrace+0x0/0x458 [ 51.760286][ T5279] show_stack+0x2c/0x3c [ 51.761010][ T5279] __dump_stack+0x30/0x40 [ 51.761752][ T5279] dump_stack_lvl+0xf4/0x15c [ 51.762503][ T5279] dump_stack+0x1c/0x5c [ 51.763221][ T5279] should_fail+0x3c8/0x520 [ 51.763987][ T5279] __should_failslab+0xbc/0x10c [ 51.764815][ T5279] should_failslab+0x10/0x28 [ 51.765637][ T5279] slab_pre_alloc_hook+0x64/0xe8 [ 51.766496][ T5279] kmem_cache_alloc+0x94/0x3d8 [ 51.767314][ T5279] mempool_alloc_slab+0x58/0x74 [ 51.768202][ T5279] mempool_alloc+0x148/0x3d4 [ 51.768963][ T5279] bio_alloc_bioset+0x118/0x700 [ 51.769739][ T5279] submit_extent_page+0x420/0x1264 [ 51.770605][ T5279] write_one_eb+0x1b8/0x550 [ 51.771370][ T5279] btree_writepages+0xedc/0x153c [ 51.772163][ T5279] do_writepages+0x374/0x588 [ 51.772947][ T5279] filemap_fdatawrite_wbc+0x1d4/0x234 [ 51.773815][ T5279] filemap_fdatawrite_range+0xc0/0x114 [ 51.774828][ T5279] btrfs_write_marked_extents+0x1c0/0x368 [ 51.775814][ T5279] btrfs_sync_log+0x1290/0x1e7c [ 51.776634][ T5279] btrfs_sync_file+0xa2c/0xf2c [ 51.777420][ T5279] vfs_fsync_range+0x168/0x188 [ 51.778189][ T5279] btrfs_file_write_iter+0xa58/0xc18 [ 51.779126][ T5279] vfs_write+0x590/0xa64 [ 51.779829][ T5279] ksys_write+0x12c/0x228 [ 51.780551][ T5279] __arm64_sys_write+0x7c/0x90 [ 51.781333][ T5279] invoke_syscall+0x98/0x28c [ 51.782112][ T5279] el0_svc_common+0x13c/0x258 [ 51.782863][ T5279] do_el0_svc+0x5c/0x140 [ 51.783619][ T5279] el0_svc+0x78/0x1d0 [ 51.784264][ T5279] el0t_64_sync_handler+0xcc/0xe4 [ 51.785078][ T5279] el0t_64_sync+0x1a0/0x1a4 [ 51.960848][ T5300] set_capacity_and_notify: 9 callbacks suppressed [ 51.960857][ T5300] loop0: detected capacity change from 0 to 32768 [ 51.965259][ T5300] BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 scanned by syz-executor.0 (5300) [ 51.968987][ T5300] btrfs_printk: 94 callbacks suppressed [ 51.969250][ T5300] BTRFS info (device loop0): using crc32c (crc32c-generic) checksum algorithm [ 51.972818][ T5300] BTRFS info (device loop0): setting nodatacow, compression disabled [ 51.974941][ T5300] BTRFS warning (device loop0): 'usebackuproot' is deprecated, use 'rescue=usebackuproot' instead [ 51.976904][ T5300] BTRFS info (device loop0): trying to use backup root at mount time [ 51.978365][ T5300] BTRFS info (device loop0): metadata ratio 1564 [ 51.979288][ T5300] BTRFS info (device loop0): doing ref verification [ 51.980512][ T5300] BTRFS info (device loop0): force zlib compression, level 3 [ 51.981861][ T5300] BTRFS info (device loop0): turning on flush-on-commit [ 51.983066][ T5300] BTRFS info (device loop0): using free space tree [ 51.984085][ T5300] BTRFS info (device loop0): has skinny extents [ 51.993450][ T5300] BTRFS info (device loop0): enabling ssd optimizations [ 51.999062][ T5300] FAULT_INJECTION: forcing a failure. [ 51.999062][ T5300] name failslab, interval 1, probability 0, space 0, times 0 [ 52.001414][ T5300] CPU: 0 PID: 5300 Comm: syz-executor.0 Tainted: G W syzkaller #0 [ 52.002975][ T5300] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/02/2026 [ 52.004627][ T5300] Call trace: [ 52.005147][ T5300] dump_backtrace+0x0/0x458 [ 52.005981][ T5300] show_stack+0x2c/0x3c [ 52.006672][ T5300] __dump_stack+0x30/0x40 [ 52.007507][ T5300] dump_stack_lvl+0xf4/0x15c [ 52.008341][ T5300] dump_stack+0x1c/0x5c [ 52.009090][ T5300] should_fail+0x3c8/0x520 [ 52.009861][ T5300] __should_failslab+0xbc/0x10c [ 52.010720][ T5300] should_failslab+0x10/0x28 [ 52.011534][ T5300] slab_pre_alloc_hook+0x64/0xe8 [ 52.012336][ T5300] kmem_cache_alloc+0x94/0x3d8 [ 52.013080][ T5300] mempool_alloc_slab+0x58/0x74 [ 52.013895][ T5300] mempool_alloc+0x148/0x3d4 [ 52.014656][ T5300] bio_alloc_bioset+0x118/0x700 [ 52.015454][ T5300] submit_extent_page+0x420/0x1264 [ 52.016281][ T5300] write_one_eb+0x1b8/0x550 [ 52.017026][ T5300] btree_writepages+0xedc/0x153c [ 52.017872][ T5300] do_writepages+0x374/0x588 [ 52.018654][ T5300] filemap_fdatawrite_wbc+0x1d4/0x234 [ 52.019596][ T5300] filemap_fdatawrite_range+0xc0/0x114 [ 52.020481][ T5300] btrfs_write_marked_extents+0x1c0/0x368 [ 52.021475][ T5300] btrfs_sync_log+0x1290/0x1e7c [ 52.022309][ T5300] btrfs_sync_file+0xa2c/0xf2c [ 52.023119][ T5300] vfs_fsync_range+0x168/0x188 [ 52.023951][ T5300] btrfs_file_write_iter+0xa58/0xc18 [ 52.024903][ T5300] vfs_write+0x590/0xa64 [ 52.025653][ T5300] ksys_write+0x12c/0x228 [ 52.026407][ T5300] __arm64_sys_write+0x7c/0x90 [ 52.027267][ T5300] invoke_syscall+0x98/0x28c [ 52.028065][ T5300] el0_svc_common+0x13c/0x258 [ 52.028927][ T5300] do_el0_svc+0x5c/0x140 [ 52.029667][ T5300] el0_svc+0x78/0x1d0 [ 52.030346][ T5300] el0t_64_sync_handler+0xcc/0xe4 [ 52.031192][ T5300] el0t_64_sync+0x1a0/0x1a4