------------[ cut here ]------------ kernel BUG at fs/buffer.c:3049! EXT4-fs (loop1): inodes count not valid: 458784 vs 32 invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 21331 Comm: kmmpd-loop0 Not tainted 4.19.205-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:submit_bh_wbc+0x5e5/0x760 fs/buffer.c:3049 Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 c1 a0 b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 b2 a0 b1 ff 0f 0b e8 ab a0 b1 ff <0f> 0b e8 a4 a0 b1 ff 0f 0b e8 9d a0 b1 ff 0f 0b e8 96 a0 b1 ff 0f RSP: 0018:ffff88802ee1fd78 EFLAGS: 00010293 RAX: ffff8880978cc000 RBX: ffff88803999a348 RCX: ffffffff81b0eca1 RDX: 0000000000000000 RSI: ffffffff81b0f215 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003800 R13: 0000000000000000 R14: 0000000000000001 R15: 000000010002f116 FS: 0000000000000000(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001bbd708 CR3: 0000000038db0000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: write_mmp_block+0x1e4/0x310 fs/ext4/mmp.c:55 kmmpd+0x71f/0xa80 fs/ext4/mmp.c:246 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Modules linked in: ---[ end trace 4a66bcf158875a93 ]--- RIP: 0010:submit_bh_wbc+0x5e5/0x760 fs/buffer.c:3049 Code: 10 4c 8d 7b 20 48 89 44 24 08 e9 3e fc ff ff e8 c1 a0 b1 ff f0 80 63 01 f7 e9 4d fb ff ff e8 b2 a0 b1 ff 0f 0b e8 ab a0 b1 ff <0f> 0b e8 a4 a0 b1 ff 0f 0b e8 9d a0 b1 ff 0f 0b e8 96 a0 b1 ff 0f EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue RSP: 0018:ffff88802ee1fd78 EFLAGS: 00010293 RAX: ffff8880978cc000 RBX: ffff88803999a348 RCX: ffffffff81b0eca1 RDX: 0000000000000000 RSI: ffffffff81b0f215 RDI: 0000000000000001 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000003800 EXT4-fs (loop1): inodes count not valid: 589856 vs 32 R13: 0000000000000000 R14: 0000000000000001 R15: 000000010002f116 FS: 0000000000000000(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffc8d5e6f68 CR3: 000000003e56e000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400