NILFS (loop1): nilfs_get_block (ino=18): a race condition while inserting a data block at offset=0
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WARNING: CPU: 0 PID: 19489 at fs/buffer.c:1193 mark_buffer_dirty+0x2dd/0x500
Modules linked in:

CPU: 0 PID: 19489 Comm: syz-executor.1 Not tainted 6.5.0-rc5-syzkaller-00029-g14f9643dc90a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:mark_buffer_dirty+0x2dd/0x500 fs/buffer.c:1193
Code: df e8 c7 17 e0 ff 48 8b 3b be 04 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 62 5d fc ff e8 5d 4a 87 ff e9 71 ff ff ff e8 53 4a 87 ff <0f> 0b e9 6d fd ff ff e8 47 4a 87 ff 0f 0b e9 96 fd ff ff e8 3b 4a
RSP: 0018:ffffc900039ceea8 EFLAGS: 00010283

RAX: ffffffff82046d2d RBX: ffff888084670701 RCX: 0000000000040000
RDX: ffffc90003c71000 RSI: 00000000000028e8 RDI: 00000000000028e9
RBP: 0000000000000000 R08: ffffffff82046a94 R09: 1ffff110108a6400
R10: dffffc0000000000 R11: ffffed10108a6401 R12: ffff888084532000
R13: ffff88802004d2ec R14: 1ffff92000739dfa R15: ffffc900039cefc0
FS:  00007f45af11d6c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa5219fe000 CR3: 00000000295af000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 nilfs_palloc_commit_alloc_entry+0x4b/0x160 fs/nilfs2/alloc.c:585
 nilfs_dat_commit_alloc+0x1ac/0x2c0 fs/nilfs2/dat.c:102
 nilfs_bmap_commit_alloc_ptr fs/nilfs2/bmap.h:194 [inline]
 nilfs_direct_insert+0x2d8/0x510 fs/nilfs2/direct.c:128
 nilfs_bmap_do_insert fs/nilfs2/bmap.c:129 [inline]
 nilfs_bmap_insert+0x251/0x3b0 fs/nilfs2/bmap.c:155
 nilfs_get_block+0x428/0x8e0 fs/nilfs2/inode.c:101
 __block_write_begin_int+0x555/0x1a60 fs/buffer.c:2128
 __block_write_begin fs/buffer.c:2178 [inline]
 block_write_begin+0x9c/0x1f0 fs/buffer.c:2239
 nilfs_write_begin+0xa0/0x110 fs/nilfs2/inode.c:261
 generic_perform_write+0x31b/0x630 mm/filemap.c:3923
 generic_file_write_iter+0xaf/0x310 mm/filemap.c:4044
 do_iter_write+0x84f/0xde0 fs/read_write.c:860
 iter_file_splice_write+0x86d/0x1010 fs/splice.c:739
 do_splice_from fs/splice.c:936 [inline]
 direct_splice_actor+0xea/0x1c0 fs/splice.c:1145
 splice_direct_to_actor+0x376/0x9e0 fs/splice.c:1091
 do_splice_direct+0x2ac/0x3f0 fs/splice.c:1197
 do_sendfile+0x623/0x1070 fs/read_write.c:1254
 __do_sys_sendfile64 fs/read_write.c:1322 [inline]
 __se_sys_sendfile64+0x17c/0x1e0 fs/read_write.c:1308
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f45ae47cae9
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:00007f45af11d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f45ae59bf80 RCX: 00007f45ae47cae9
RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004
RBP: 00007f45ae4c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f45ae59bf80 R15: 00007fffdf5815e8
 </TASK>