Warning: Permanently added '10.128.0.197' (ED25519) to the list of known hosts. 2025/07/28 09:51:52 ignoring optional flag "sandboxArg"="0" 2025/07/28 09:51:52 ignoring optional flag "type"="gce" 2025/07/28 09:51:52 parsed 1 programs [ 71.319619][ T1428] ieee802154 phy0 wpan0: encryption failed: -22 [ 71.326964][ T1428] ieee802154 phy1 wpan1: encryption failed: -22 2025/07/28 09:51:54 executed programs: 0 [ 73.009841][ T4463] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k FS [ 73.130095][ T4510] chnl_net:caif_netlink_parms(): no params data found [ 73.164315][ T4510] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.171484][ T4510] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.179354][ T4510] device bridge_slave_0 entered promiscuous mode [ 73.187551][ T4510] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.194640][ T4510] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.202388][ T4510] device bridge_slave_1 entered promiscuous mode [ 73.221000][ T4510] bond0: (slave bond_slave_0): Enslaving as an active interface with an up link [ 73.231587][ T4510] bond0: (slave bond_slave_1): Enslaving as an active interface with an up link [ 73.252002][ T4510] team0: Port device team_slave_0 added [ 73.259035][ T4510] team0: Port device team_slave_1 added [ 73.275422][ T4510] batman_adv: batadv0: Adding interface: batadv_slave_0 [ 73.282368][ T4510] 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. [ 73.309159][ T4510] batman_adv: batadv0: Not using interface batadv_slave_0 (retrying later): interface not active [ 73.320826][ T4510] batman_adv: batadv0: Adding interface: batadv_slave_1 [ 73.327910][ T4510] 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. [ 73.353891][ T4510] batman_adv: batadv0: Not using interface batadv_slave_1 (retrying later): interface not active [ 73.380189][ T4510] device hsr_slave_0 entered promiscuous mode [ 73.387057][ T4510] device hsr_slave_1 entered promiscuous mode [ 73.816898][ T4510] netdevsim netdevsim0 netdevsim0: renamed from eth0 [ 73.826570][ T4510] netdevsim netdevsim0 netdevsim1: renamed from eth1 [ 73.837975][ T4510] netdevsim netdevsim0 netdevsim2: renamed from eth2 [ 73.848123][ T4510] netdevsim netdevsim0 netdevsim3: renamed from eth3 [ 73.873185][ T4510] bridge0: port 2(bridge_slave_1) entered blocking state [ 73.880310][ T4510] bridge0: port 2(bridge_slave_1) entered forwarding state [ 73.887823][ T4510] bridge0: port 1(bridge_slave_0) entered blocking state [ 73.894995][ T4510] bridge0: port 1(bridge_slave_0) entered forwarding state [ 73.947520][ T4510] 8021q: adding VLAN 0 to HW filter on device bond0 [ 73.963218][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready [ 73.973781][ T154] bridge0: port 1(bridge_slave_0) entered disabled state [ 73.982250][ T154] bridge0: port 2(bridge_slave_1) entered disabled state [ 73.990776][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bond0: link becomes ready [ 74.004541][ T4510] 8021q: adding VLAN 0 to HW filter on device team0 [ 74.017514][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_0: link becomes ready [ 74.026080][ T154] bridge0: port 1(bridge_slave_0) entered blocking state [ 74.033138][ T154] bridge0: port 1(bridge_slave_0) entered forwarding state [ 74.045253][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): bridge_slave_1: link becomes ready [ 74.054093][ T1182] bridge0: port 2(bridge_slave_1) entered blocking state [ 74.061384][ T1182] bridge0: port 2(bridge_slave_1) entered forwarding state [ 74.084051][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_0: link becomes ready [ 74.102251][ T4510] hsr0: Slave A (hsr_slave_0) is not up; please bring it up to get a fully working HSR network [ 74.114519][ T4510] hsr0: Slave B (hsr_slave_1) is not up; please bring it up to get a fully working HSR network [ 74.129094][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): team0: link becomes ready [ 74.138359][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): team_slave_1: link becomes ready [ 74.148156][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_0: link becomes ready [ 74.159166][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): hsr_slave_1: link becomes ready [ 74.172366][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): hsr0: link becomes ready [ 74.273736][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready [ 74.282043][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready [ 74.296245][ T4510] 8021q: adding VLAN 0 to HW filter on device batadv0 [ 74.316930][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_virt_wifi: link becomes ready [ 74.327203][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_virt_wifi: link becomes ready [ 74.350332][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_vlan: link becomes ready [ 74.359229][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready [ 74.368783][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready [ 74.378113][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready [ 74.388218][ T4510] device veth0_vlan entered promiscuous mode [ 74.402224][ T4510] device veth1_vlan entered promiscuous mode [ 74.424728][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan0: link becomes ready [ 74.433616][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): macvlan1: link becomes ready [ 74.442010][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready [ 74.450740][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready [ 74.461028][ T4510] device veth0_macvtap entered promiscuous mode [ 74.471515][ T4510] device veth1_macvtap entered promiscuous mode [ 74.490366][ T4510] batman_adv: batadv0: Interface activated: batadv_slave_0 [ 74.497744][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready [ 74.507604][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): macsec0: link becomes ready [ 74.515948][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready [ 74.524804][ T1182] IPv6: ADDRCONF(NETDEV_CHANGE): veth0_to_batadv: link becomes ready [ 74.539457][ T4510] batman_adv: batadv0: Interface activated: batadv_slave_1 [ 74.547186][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready [ 74.557522][ T154] IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready [ 74.570005][ T4510] netdevsim netdevsim0 netdevsim0: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.579095][ T4510] netdevsim netdevsim0 netdevsim1: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.588385][ T4510] netdevsim netdevsim0 netdevsim2: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.597628][ T4510] netdevsim netdevsim0 netdevsim3: set [1, 0] type 2 family 0 port 6081 - 0 [ 74.659095][ T154] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.673320][ T154] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.692513][ T1182] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 74.703824][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.713352][ T1182] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 74.724423][ T144] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready [ 74.795646][ T4595] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 74.941083][ T4595] [ 74.952781][ T4595] ====================================================== [ 74.959794][ T4595] WARNING: possible circular locking dependency detected [ 74.967016][ T4595] 5.15.189-syzkaller #0 Not tainted [ 74.972210][ T4595] ------------------------------------------------------ [ 74.979403][ T4595] syz-executor.0/4595 is trying to acquire lock: [ 74.985724][ T4595] ffff8881479383f0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_bmap+0x4d/0x3f0 [ 74.995318][ T4595] [ 74.995318][ T4595] but task is already holding lock: [ 75.002679][ T4595] ffff88814cb603f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x316/0xca0 [ 75.013296][ T4595] [ 75.013296][ T4595] which lock already depends on the new lock. [ 75.013296][ T4595] [ 75.023780][ T4595] [ 75.023780][ T4595] the existing dependency chain (in reverse order) is: [ 75.032789][ T4595] [ 75.032789][ T4595] -> #3 (&journal->j_checkpoint_mutex){+.+.}-{3:3}: [ 75.041564][ T4595] __mutex_lock_common+0x1eb/0x2390 [ 75.047302][ T4595] mutex_lock_io_nested+0x43/0x60 [ 75.052852][ T4595] jbd2_journal_flush+0x287/0xca0 [ 75.058411][ T4595] ext4_ioctl+0x2e93/0x3590 [ 75.063446][ T4595] __se_sys_ioctl+0xfa/0x170 [ 75.068573][ T4595] do_syscall_64+0x4c/0xa0 [ 75.073544][ T4595] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 75.079975][ T4595] [ 75.079975][ T4595] -> #2 (&journal->j_barrier){+.+.}-{3:3}: [ 75.087961][ T4595] __mutex_lock_common+0x1eb/0x2390 [ 75.093692][ T4595] mutex_lock_nested+0x17/0x20 [ 75.098981][ T4595] jbd2_journal_lock_updates+0x2ba/0x380 [ 75.105138][ T4595] ext4_change_inode_journal_flag+0x19c/0x6b0 [ 75.111741][ T4595] ext4_fileattr_set+0xddc/0x16a0 [ 75.117380][ T4595] vfs_fileattr_set+0x842/0xaf0 [ 75.122845][ T4595] do_vfs_ioctl+0x1767/0x1de0 [ 75.128134][ T4595] __se_sys_ioctl+0x83/0x170 [ 75.133249][ T4595] do_syscall_64+0x4c/0xa0 [ 75.138191][ T4595] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 75.144616][ T4595] [ 75.144616][ T4595] -> #1 (&sbi->s_writepages_rwsem){++++}-{0:0}: [ 75.153045][ T4595] percpu_down_write+0x52/0x2f0 [ 75.158431][ T4595] ext4_ind_migrate+0x259/0x910 [ 75.163819][ T4595] ext4_fileattr_set+0xece/0x16a0 [ 75.169661][ T4595] vfs_fileattr_set+0x842/0xaf0 [ 75.175419][ T4595] do_vfs_ioctl+0x1767/0x1de0 [ 75.180635][ T4595] __se_sys_ioctl+0x83/0x170 [ 75.185752][ T4595] do_syscall_64+0x4c/0xa0 [ 75.190704][ T4595] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 75.197121][ T4595] [ 75.197121][ T4595] -> #0 (&sb->s_type->i_mutex_key#9){++++}-{3:3}: [ 75.205735][ T4595] __lock_acquire+0x2c33/0x7c60 [ 75.211117][ T4595] lock_acquire+0x197/0x3f0 [ 75.216146][ T4595] down_read+0x44/0x2e0 [ 75.220823][ T4595] ext4_bmap+0x4d/0x3f0 [ 75.225504][ T4595] bmap+0xa2/0xd0 [ 75.229658][ T4595] jbd2_journal_flush+0x648/0xca0 [ 75.235200][ T4595] ext4_ioctl+0x2e93/0x3590 [ 75.240314][ T4595] __se_sys_ioctl+0xfa/0x170 [ 75.245449][ T4595] do_syscall_64+0x4c/0xa0 [ 75.250397][ T4595] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 75.256819][ T4595] [ 75.256819][ T4595] other info that might help us debug this: [ 75.256819][ T4595] [ 75.267056][ T4595] Chain exists of: [ 75.267056][ T4595] &sb->s_type->i_mutex_key#9 --> &journal->j_barrier --> &journal->j_checkpoint_mutex [ 75.267056][ T4595] [ 75.282527][ T4595] Possible unsafe locking scenario: [ 75.282527][ T4595] [ 75.289976][ T4595] CPU0 CPU1 [ 75.295339][ T4595] ---- ---- [ 75.300704][ T4595] lock(&journal->j_checkpoint_mutex); [ 75.306250][ T4595] lock(&journal->j_barrier); [ 75.313532][ T4595] lock(&journal->j_checkpoint_mutex); [ 75.321611][ T4595] lock(&sb->s_type->i_mutex_key#9); [ 75.326998][ T4595] [ 75.326998][ T4595] *** DEADLOCK *** [ 75.326998][ T4595] [ 75.335142][ T4595] 2 locks held by syz-executor.0/4595: [ 75.340595][ T4595] #0: ffff88814cb60170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x2ba/0x380 [ 75.351564][ T4595] #1: ffff88814cb603f8 (&journal->j_checkpoint_mutex){+.+.}-{3:3}, at: jbd2_journal_flush+0x316/0xca0 [ 75.362632][ T4595] [ 75.362632][ T4595] stack backtrace: [ 75.368525][ T4595] CPU: 0 PID: 4595 Comm: syz-executor.0 Not tainted 5.15.189-syzkaller #0 [ 75.377040][ T4595] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 75.387387][ T4595] Call Trace: [ 75.390668][ T4595] [ 75.393596][ T4595] dump_stack_lvl+0x168/0x230 [ 75.398291][ T4595] ? load_image+0x3b0/0x3b0 [ 75.402794][ T4595] ? show_regs_print_info+0x20/0x20 [ 75.407998][ T4595] ? print_circular_bug+0x12b/0x1a0 [ 75.413238][ T4595] check_noncircular+0x274/0x310 [ 75.418591][ T4595] ? add_chain_block+0x940/0x940 [ 75.423538][ T4595] ? lockdep_lock+0xdc/0x1e0 [ 75.428224][ T4595] ? mark_lock+0x94/0x320 [ 75.432567][ T4595] __lock_acquire+0x2c33/0x7c60 [ 75.437593][ T4595] ? _raw_spin_lock_irqsave+0xb0/0xf0 [ 75.442980][ T4595] ? verify_lock_unused+0x140/0x140 [ 75.448270][ T4595] ? _raw_spin_unlock_irqrestore+0x82/0x100 [ 75.454278][ T4595] ? lockdep_hardirqs_on+0x94/0x140 [ 75.459483][ T4595] ? verify_lock_unused+0x140/0x140 [ 75.464820][ T4595] ? schedule+0x132/0x1e0 [ 75.469157][ T4595] ? io_schedule+0x7c/0xd0 [ 75.473585][ T4595] lock_acquire+0x197/0x3f0 [ 75.478096][ T4595] ? ext4_bmap+0x4d/0x3f0 [ 75.482797][ T4595] ? __might_sleep+0xf0/0xf0 [ 75.487393][ T4595] ? read_lock_is_recursive+0x10/0x10 [ 75.492881][ T4595] ? jbd2_journal_flush+0x372/0xca0 [ 75.498092][ T4595] ? ext4_journalled_write_end+0xf30/0xf30 [ 75.503910][ T4595] down_read+0x44/0x2e0 [ 75.508074][ T4595] ? ext4_bmap+0x4d/0x3f0 [ 75.512413][ T4595] ? ext4_journalled_write_end+0xf30/0xf30 [ 75.518235][ T4595] ext4_bmap+0x4d/0x3f0 [ 75.522661][ T4595] ? ext4_journalled_write_end+0xf30/0xf30 [ 75.528580][ T4595] bmap+0xa2/0xd0 [ 75.532224][ T4595] jbd2_journal_flush+0x648/0xca0 [ 75.537270][ T4595] ? __bpf_trace_jbd2_shrink_checkpoint_list+0x50/0x50 [ 75.544127][ T4595] ? bpf_lsm_capable+0x5/0x10 [ 75.549027][ T4595] ? security_capable+0x85/0xb0 [ 75.553891][ T4595] ext4_ioctl+0x2e93/0x3590 [ 75.558406][ T4595] ? ext4_fileattr_set+0x16a0/0x16a0 [ 75.563709][ T4595] ? __ia32_compat_sys_ioctl+0x850/0x850 [ 75.569370][ T4595] ? rcu_lock_release+0x5/0x20 [ 75.574164][ T4595] ? __lock_acquire+0x7c60/0x7c60 [ 75.579458][ T4595] ? kfree+0xef/0x2a0 [ 75.583443][ T4595] ? tomoyo_path_number_perm+0x4d4/0x5d0 [ 75.589079][ T4595] ? verify_lock_unused+0x140/0x140 [ 75.594287][ T4595] ? tomoyo_check_path_acl+0x1c0/0x1c0 [ 75.599770][ T4595] ? bpf_lsm_file_ioctl+0x5/0x10 [ 75.604720][ T4595] ? security_file_ioctl+0x7c/0xa0 [ 75.609844][ T4595] ? ext4_fileattr_set+0x16a0/0x16a0 [ 75.615139][ T4595] __se_sys_ioctl+0xfa/0x170 [ 75.619742][ T4595] do_syscall_64+0x4c/0xa0 [ 75.624169][ T4595] ? clear_bhb_loop+0x30/0x80 [ 75.628859][ T4595] ? clear_bhb_loop+0x30/0x80 [ 75.633539][ T4595] entry_SYSCALL_64_after_hwframe+0x66/0xd0 [ 75.639452][ T4595] RIP: 0033:0x7fd1c8b15ae9 [ 75.643874][ T4595] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 [ 75.663574][ T4595] RSP: 002b:00007fd1c7e970c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 75.672169][ T4595] RAX: ffffffffffffffda RBX: 00007fd1c8c34f80 RCX: 00007fd1c8b15ae9 [ 75.680316][ T4595] RDX: 00000000200005c0 RSI: 000000004004662b RDI: 0000000000000004 [ 75.688311][ T4595] RBP: 00007fd1c8b6147a R08: 0000000000000000 R09: 0000000000000000 [ 75.696290][ T4595] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 75.704277][ T4595] R13: 000000000000000b R14: 00007fd1c8c34f80 R15: 00007ffd93a779a8 [ 75.712355][ T4595] [ 75.719001][ T1107] Bluetooth: hci0: command 0x0409 tx timeout [ 75.831109][ T4682] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 75.883743][ T4691] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 75.945902][ T4697] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 75.999168][ T4704] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 76.072808][ T4711] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 76.140029][ T4719] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 76.202432][ T4726] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 76.274525][ T4733] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 76.346300][ T4742] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 76.435587][ T13] cfg80211: failed to load regulatory.db [ 77.795835][ T1107] Bluetooth: hci0: command 0x041b tx timeout 2025/07/28 09:51:59 executed programs: 38 [ 79.806944][ T5029] ext4_ioctl_checkpoint: 70 callbacks suppressed [ 79.806954][ T5029] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 79.853748][ T5031] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 79.885615][ T4210] Bluetooth: hci0: command 0x040f tx timeout [ 79.919079][ T5033] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 79.961887][ T5035] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 80.013194][ T5037] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 80.063802][ T5039] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 80.110217][ T5041] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 80.157518][ T5043] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 80.205148][ T5045] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 80.256579][ T5047] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 81.955552][ T4210] Bluetooth: hci0: command 0x0419 tx timeout 2025/07/28 09:52:04 executed programs: 159 [ 84.816145][ T5271] ext4_ioctl_checkpoint: 111 callbacks suppressed [ 84.816154][ T5271] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow [ 84.862628][ T5273] warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow