NILFS (loop1): nilfs_get_block (ino=18): a race condition while inserting a data block at offset=0
------------[ cut here ]------------
kernel BUG at fs/buffer.c:2765!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 PID: 6921 Comm: syz-executor.1 Not tainted 6.8.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:submit_bh_wbc+0x517/0x540 fs/buffer.c:2765
Code: 68 7e ff be 00 10 00 00 48 c7 c7 40 91 26 8e 4c 89 ea e8 bc f2 bb 02 e9 b1 fe ff ff e8 92 68 7e ff 90 0f 0b e8 8a 68 7e ff 90 <0f> 0b e8 82 68 7e ff 90 0f 0b e8 7a 68 7e ff 90 0f 0b e8 72 68 7e
RSP: 0018:ffffc90005137838 EFLAGS: 00010293
RAX: ffffffff821503c6 RBX: 0000000000000000 RCX: ffff88802b78d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8214ff54 R09: 1ffff1100f8cf7b2
R10: dffffc0000000000 R11: ffffed100f8cf7b3 R12: ffff88807c67bd90
R13: 1ffff1100f8cf7b2 R14: 0000000000000000 R15: 0000000000000400
FS:  00007f4707b956c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0258a6000 CR3: 0000000020372000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 submit_bh fs/buffer.c:2805 [inline]
 __bh_read fs/buffer.c:3070 [inline]
 bh_read_nowait include/linux/buffer_head.h:417 [inline]
 __block_write_begin_int+0x12ce/0x1a70 fs/buffer.c:2132
 __block_write_begin fs/buffer.c:2152 [inline]
 block_write_begin+0x9b/0x1e0 fs/buffer.c:2211
 nilfs_write_begin+0xa0/0x110 fs/nilfs2/inode.c:262
 generic_perform_write+0x321/0x640 mm/filemap.c:3930
 __generic_file_write_iter+0x1b8/0x230 mm/filemap.c:4022
 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4051
 call_write_iter include/linux/fs.h:2087 [inline]
 new_sync_write fs/read_write.c:497 [inline]
 vfs_write+0xa81/0xcb0 fs/read_write.c:590
 ksys_write+0x1a0/0x2c0 fs/read_write.c:643
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f4706e7dda9
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
RSP: 002b:00007f4707b950c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f4706fac120 RCX: 00007f4706e7dda9
RDX: 0000000000000009 RSI: 0000000020000080 RDI: 0000000000000005
RBP: 00007f4706eca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f4706fac120 R15: 00007ffe544f09c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:submit_bh_wbc+0x517/0x540 fs/buffer.c:2765
Code: 68 7e ff be 00 10 00 00 48 c7 c7 40 91 26 8e 4c 89 ea e8 bc f2 bb 02 e9 b1 fe ff ff e8 92 68 7e ff 90 0f 0b e8 8a 68 7e ff 90 <0f> 0b e8 82 68 7e ff 90 0f 0b e8 7a 68 7e ff 90 0f 0b e8 72 68 7e
RSP: 0018:ffffc90005137838 EFLAGS: 00010293
RAX: ffffffff821503c6 RBX: 0000000000000000 RCX: ffff88802b78d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8214ff54 R09: 1ffff1100f8cf7b2
R10: dffffc0000000000 R11: ffffed100f8cf7b3 R12: ffff88807c67bd90
R13: 1ffff1100f8cf7b2 R14: 0000000000000000 R15: 0000000000000400
FS:  00007f4707b956c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9ccd993000 CR3: 0000000020372000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400