Warning: Permanently added '10.128.0.57' (ECDSA) to the list of known hosts.
syzkaller login: [   53.421508] IPVS: ftp: loaded support on port[0] = 21
executing program
[   53.506751] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue
[   53.519514] EXT4-fs error (device loop0): ext4_validate_block_bitmap:392: comm syz-executor120: bg 0: block 5: invalid block bitmap
[   53.594657] ------------[ cut here ]------------
[   53.599770] kernel BUG at fs/ext4/inode.c:2794!
[   53.605879] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[   53.611236] CPU: 0 PID: 3121 Comm: kworker/u4:4 Not tainted 4.19.211-syzkaller #0
[   53.618989] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022
[   53.628708] Workqueue: writeback wb_workfn (flush-7:0)
[   53.633982] RIP: 0010:ext4_writepages+0x2d31/0x37f0
[   53.639253] Code: 00 fc ff df 44 89 64 24 18 48 c1 ea 03 80 3c 02 00 0f 84 25 da ff ff 48 8b 3c 24 e8 89 2d b8 ff e9 17 da ff ff e8 8f 50 82 ff <0f> 0b 4c 8b b4 24 20 01 00 00 e8 80 50 82 ff 0f b6 ac 24 50 02 00
[   53.658950] RSP: 0018:ffff8880ab317500 EFLAGS: 00010293
[   53.664299] RAX: ffff8880ab2f8440 RBX: 0000000000000001 RCX: ffffffff81e03070
[   53.671649] RDX: 0000000000000000 RSI: ffffffff81e034e1 RDI: 0000000000000007
[   53.678985] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   53.686332] R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000001
[   53.693825] R13: dffffc0000000000 R14: ffff88808cfe98b0 R15: 0000000000000000
[   53.701216] FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
[   53.709769] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   53.715635] CR2: 000056045d92c8e0 CR3: 0000000090ed4000 CR4: 00000000003406f0
[   53.723607] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   53.730876] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   53.738304] Call Trace:
[   53.740883]  ? unwind_next_frame+0x1400/0x1400
[   53.745525]  ? __lock_acquire+0x6de/0x3ff0
[   53.749843]  ? __lock_acquire+0x6de/0x3ff0
[   53.754203]  ? __bfs.part.0+0x1ce/0x450
[   53.758327]  ? ext4_mark_inode_dirty+0x870/0x870
[   53.763119]  ? __lock_acquire+0x22f9/0x3ff0
[   53.767538]  ? deref_stack_reg+0x134/0x1d0
[   53.772034]  ? mark_held_locks+0xf0/0xf0
[   53.776079]  ? __lock_acquire+0x6de/0x3ff0
[   53.780387]  ? __lock_acquire+0x6de/0x3ff0
[   53.784625]  ? get_reg+0x1f0/0x1f0
[   53.788149]  ? mark_held_locks+0xf0/0xf0
[   53.792194]  ? deref_stack_reg+0x1d0/0x1d0
[   53.796417]  ? ext4_mark_inode_dirty+0x870/0x870
[   53.802147]  do_writepages+0xe5/0x290
[   53.805949]  ? page_writeback_cpu_online+0x10/0x10
[   53.810868]  ? lock_downgrade+0x720/0x720
[   53.815092]  ? check_preemption_disabled+0x41/0x280
[   53.820275]  __writeback_single_inode+0x10c/0x11d0
[   53.825281]  writeback_sb_inodes+0x537/0xef0
[   53.829675]  ? wbc_detach_inode+0x840/0x840
[   53.833992]  ? rcu_read_lock_sched_held+0x16c/0x1d0
[   53.839006]  ? queue_io+0x448/0x590
[   53.842622]  wb_writeback+0x28d/0xcc0
[   53.846419]  ? writeback_inodes_wb.constprop.0+0x1d0/0x1d0
[   53.852116]  wb_workfn+0x29b/0x1250
[   53.855760]  ? inode_wait_for_writeback+0x30/0x30
[   53.860677]  ? check_preemption_disabled+0x41/0x280
[   53.865791]  process_one_work+0x864/0x1570
[   53.870018]  ? pwq_dec_nr_in_flight+0x2d0/0x2d0
[   53.874848]  worker_thread+0x64c/0x1130
[   53.878808]  ? __kthread_parkme+0x133/0x1e0
[   53.883197]  ? process_one_work+0x1570/0x1570
[   53.887762]  kthread+0x33f/0x460
[   53.891412]  ? kthread_park+0x180/0x180
[   53.895474]  ret_from_fork+0x24/0x30
[   53.899266] Modules linked in:
[   53.903558] ---[ end trace 86e459440e0d24f1 ]---
[   53.908341] RIP: 0010:ext4_writepages+0x2d31/0x37f0
[   53.913822] Code: 00 fc ff df 44 89 64 24 18 48 c1 ea 03 80 3c 02 00 0f 84 25 da ff ff 48 8b 3c 24 e8 89 2d b8 ff e9 17 da ff ff e8 8f 50 82 ff <0f> 0b 4c 8b b4 24 20 01 00 00 e8 80 50 82 ff 0f b6 ac 24 50 02 00
[   53.933193] RSP: 0018:ffff8880ab317500 EFLAGS: 00010293
[   53.938859] RAX: ffff8880ab2f8440 RBX: 0000000000000001 RCX: ffffffff81e03070
[   53.946355] RDX: 0000000000000000 RSI: ffffffff81e034e1 RDI: 0000000000000007
[   53.953839] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   53.961199] R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000001
[   53.968712] R13: dffffc0000000000 R14: ffff88808cfe98b0 R15: 0000000000000000
[   53.976364] FS:  0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000
[   53.984838] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   53.990914] CR2: 000056045d92c8e0 CR3: 0000000090ed4000 CR4: 00000000003406f0
[   53.998403] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   54.006313] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   54.013816] Kernel panic - not syncing: Fatal exception
[   54.019416] Kernel Offset: disabled
[   54.023029] Rebooting in 86400 seconds..