NILFS (loop2): 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: 1 PID: 27062 Comm: syz-executor.2 Not tainted 6.8.0-rc7-syzkaller-00017-g29cd507cbec2 #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: 6d 7e ff be 00 10 00 00 48 c7 c7 40 91 26 8e 4c 89 ea e8 5c ea bb 02 e9 b1 fe ff ff e8 72 6d 7e ff 90 0f 0b e8 6a 6d 7e ff 90 <0f> 0b e8 62 6d 7e ff 90 0f 0b e8 5a 6d 7e ff 90 0f 0b e8 52 6d 7e
RSP: 0018:ffffc90014daf698 EFLAGS: 00010287
RAX: ffffffff8214ffe6 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000bbfa000 RSI: 0000000000001bb7 RDI: 0000000000001bb8
RBP: 0000000000000000 R08: ffffffff8214fb74 R09: 1ffff11004bc16ae
R10: dffffc0000000000 R11: ffffed1004bc16af R12: ffff888025e0b570
R13: 1ffff11004bc16ae R14: 0000000000000000 R15: 0000000000000400
FS:  00007f692a8476c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2b7c61a000 CR3: 000000007d064000 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
 do_iter_readv_writev+0x46c/0x640
 vfs_writev+0x395/0xbb0 fs/read_write.c:971
 do_pwritev fs/read_write.c:1072 [inline]
 __do_sys_pwritev2 fs/read_write.c:1131 [inline]
 __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1122
 do_syscall_64+0xf9/0x240
 entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f6929a7dda9
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:00007f692a8470c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f6929bac1f0 RCX: 00007f6929a7dda9
RDX: 0000000000000003 RSI: 0000000020000440 RDI: 0000000000000005
RBP: 00007f6929aca47a R08: 000000000000009b R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f6929bac1f0 R15: 00007ffff1f03418
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:submit_bh_wbc+0x517/0x540 fs/buffer.c:2765
Code: 6d 7e ff be 00 10 00 00 48 c7 c7 40 91 26 8e 4c 89 ea e8 5c ea bb 02 e9 b1 fe ff ff e8 72 6d 7e ff 90 0f 0b e8 6a 6d 7e ff 90 <0f> 0b e8 62 6d 7e ff 90 0f 0b e8 5a 6d 7e ff 90 0f 0b e8 52 6d 7e
RSP: 0018:ffffc90014daf698 EFLAGS: 00010287
RAX: ffffffff8214ffe6 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000bbfa000 RSI: 0000000000001bb7 RDI: 0000000000001bb8
RBP: 0000000000000000 R08: ffffffff8214fb74 R09: 1ffff11004bc16ae
R10: dffffc0000000000 R11: ffffed1004bc16af R12: ffff888025e0b570
R13: 1ffff11004bc16ae R14: 0000000000000000 R15: 0000000000000400
FS:  00007f692a8476c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f38b123f000 CR3: 000000007d064000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400