------------[ cut here ]------------
WARNING: CPU: 0 PID: 5316 at fs/buffer.c:1186 mark_buffer_dirty+0x2a9/0x410 fs/buffer.c:1186
Modules linked in:
CPU: 0 UID: 0 PID: 5316 Comm: syz.0.0 Not tainted 6.15.0-rc4-syzkaller-00296-ge8ab83e34bdc #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:mark_buffer_dirty+0x2a9/0x410 fs/buffer.c:1186
Code: 4c 89 f7 e8 79 0d de ff 49 8b 3e be 20 00 00 00 5b 41 5c 41 5e 41 5f 5d e9 c4 34 fc ff e8 8f 18 7c ff eb 8c e8 88 18 7c ff 90 <0f> 0b 90 e9 95 fd ff ff e8 7a 18 7c ff 90 0f 0b 90 e9 bf fd ff ff
RSP: 0018:ffffc9000d3af4c0 EFLAGS: 00010287
RAX: ffffffff8243a7c8 RBX: ffff8880435509f8 RCX: 0000000000100000
RDX: ffffc9000e78b000 RSI: 00000000000001c4 RDI: 00000000000001c5
RBP: 0000000000000001 R08: ffff8880435509ff R09: 1ffff110086aa13f
R10: dffffc0000000000 R11: ffffed10086aa140 R12: 0000000000002000
R13: ffff8880435509f8 R14: 0000000000000006 R15: ffff888043550a20
FS:  00007f5edeb5c6c0(0000) GS:ffff88808d6cb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5edeb5bfc8 CR3: 000000003619e000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 minix_new_block+0x20f/0x2d0 fs/minix/bitmap.c:86
 alloc_branch fs/minix/itree_common.c:77 [inline]
 get_block+0x598/0x13a0 fs/minix/itree_common.c:197
 __block_write_begin_int+0x6b2/0x1900 fs/buffer.c:2151
 block_write_begin+0x8a/0x120 fs/buffer.c:2262
 minix_write_begin+0x35/0x80 fs/minix/inode.c:451
 generic_perform_write+0x2c4/0x910 mm/filemap.c:4103
 generic_file_write_iter+0x10f/0x540 mm/filemap.c:4246
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x548/0xa90 fs/read_write.c:684
 ksys_write+0x145/0x250 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5eddd8e969
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5edeb5c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5eddfb6080 RCX: 00007f5eddd8e969
RDX: 000000000000fff2 RSI: 00002000000000c0 RDI: 0000000000000008
RBP: 00007f5edde10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5eddfb6080 R15: 00007ffd992f35e8
 </TASK>