Warning: Permanently added '10.128.0.69' (ECDSA) to the list of known hosts.
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syzkaller login: [   46.765068] ======================================================
[   46.765068] WARNING: the mand mount option is being deprecated and
[   46.765068]          will be removed in v5.15!
[   46.765068] ======================================================
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[   46.987846] EXT4-fs (loop5): VFS: Can't find ext4 filesystem
[   47.010516] EXT4-fs (loop1): Magic mismatch, very weird!
[   47.020131] EXT4-fs (loop4): Magic mismatch, very weird!
[   47.035588] EXT4-fs error (device loop2): ext4_fill_super:4450: inode #2: comm syz-executor102: iget: root inode unallocated
[   47.050802] EXT4-fs (loop2): get root inode failed
[   47.064894] EXT4-fs (loop2): mount failed
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[   47.396662] EXT4-fs (loop5): Magic mismatch, very weird!
[   47.405260] EXT4-fs error (device loop0): ext4_fill_super:4450: inode #2: comm syz-executor102: iget: root inode unallocated
[   47.418952] EXT4-fs error (device loop1): ext4_fill_super:4450: inode #2: comm syz-executor102: iget: root inode unallocated
[   47.434322] EXT4-fs (loop1): get root inode failed
[   47.434628] EXT4-fs (loop2): Magic mismatch, very weird!
[   47.439402] EXT4-fs (loop1): mount failed
[   47.452431] ------------[ cut here ]------------
[   47.455800] EXT4-fs (loop0): get root inode failed
[   47.457302] kernel BUG at fs/buffer.c:3049!
[   47.459000] invalid opcode: 0000 [#1] PREEMPT SMP KASAN
[   47.462779] EXT4-fs (loop0): mount failed
[   47.466590] CPU: 1 PID: 8232 Comm: kmmpd-loop1 Not tainted 4.19.211-syzkaller #0
[   47.466597] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/26/2022
[   47.466616] RIP: 0010:submit_bh_wbc+0x5e5/0x760
[   47.466627] Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 41 98 b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 32 98 b1 ff 0f 0b e8 2b 98 b1 ff <0f> 0b e8 24 98 b1 ff 0f 0b e8 1d 98 b1 ff 0f 0b e8 16 98 b1 ff 0f
[   47.466633] RSP: 0018:ffff8880aecdfd78 EFLAGS: 00010293
[   47.466642] RAX: ffff8880af64a640 RBX: ffff88808cf89738 RCX: ffffffff81b0e7d1
[   47.466648] RDX: 0000000000000000 RSI: ffffffff81b0ed45 RDI: 0000000000000001
[   47.466658] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   47.543595] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003800
[   47.550850] R13: 0000000000000000 R14: 0000000000000001 R15: 00000000ffff9c32
[   47.558101] FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
[   47.566322] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.572183] CR2: 00007fdc26a7f000 CR3: 0000000098bda000 CR4: 00000000003406e0
[   47.579450] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   47.586701] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   47.593949] Call Trace:
[   47.596522]  write_mmp_block+0x1e4/0x310
[   47.600566]  kmmpd+0x71f/0xa80
[   47.603739]  ? write_mmp_block+0x310/0x310
[   47.607950]  ? lockdep_hardirqs_on+0x3a8/0x5c0
[   47.612516]  ? _raw_spin_unlock_irqrestore+0x66/0xe0
[   47.617597]  ? __kthread_parkme+0x133/0x1e0
[   47.621894]  ? write_mmp_block+0x310/0x310
[   47.626195]  kthread+0x33f/0x460
[   47.629544]  ? kthread_park+0x180/0x180
[   47.633541]  ret_from_fork+0x24/0x30
[   47.637234] Modules linked in:
[   47.641040] ---[ end trace 673e989942fbfa7b ]---
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[   47.645913] RIP: 0010:submit_bh_wbc+0x5e5/0x760
[   47.650662] Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 41 98 b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 32 98 b1 ff 0f 0b e8 2b 98 b1 ff <0f> 0b e8 24 98 b1 ff 0f 0b e8 1d 98 b1 ff 0f 0b e8 16 98 b1 ff 0f
[   47.669731] RSP: 0018:ffff8880aecdfd78 EFLAGS: 00010293
[   47.675220] RAX: ffff8880af64a640 RBX: ffff88808cf89738 RCX: ffffffff81b0e7d1
[   47.685618] RDX: 0000000000000000 RSI: ffffffff81b0ed45 RDI: 0000000000000001
[   47.694306] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[   47.702149] R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003800
[   47.710495] R13: 0000000000000000 R14: 0000000000000001 R15: 00000000ffff9c32
[   47.718229] FS:  0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
[   47.727133] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[   47.733050] CR2: 00007ffe2455f777 CR3: 00000000a0d38000 CR4: 00000000003406e0
[   47.740871] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[   47.748498] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[   47.756071] Kernel panic - not syncing: Fatal exception
[   47.761588] Kernel Offset: disabled
[   47.765197] Rebooting in 86400 seconds..