------------[ cut here ]------------
WARNING: CPU: 0 PID: 5093 at fs/bcachefs/fs-io.c:315 __bch2_truncate_folio+0x2059/0x2450 fs/bcachefs/fs-io.c:315
Modules linked in:
CPU: 0 UID: 0 PID: 5093 Comm: syz-executor230 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__bch2_truncate_folio+0x2059/0x2450 fs/bcachefs/fs-io.c:315
Code: 41 5f 5d c3 cc cc cc cc e8 b4 0f 62 fd 48 c7 c7 30 02 15 8e e8 08 86 e8 ff 89 05 62 85 24 16 e9 a0 e2 ff ff e8 98 0f 62 fd 90 <0f> 0b 90 e9 eb f9 ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c f6
RSP: 0018:ffffc90002b6f8e0 EFLAGS: 00010293
RAX: ffffffff8432c848 RBX: 0000000000000000 RCX: ffff88801cfb0000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90002b6fbf0 R08: ffffffff8432c22e R09: 1ffffd40001fdb30
R10: dffffc0000000000 R11: fffff940001fdb31 R12: 1ffff11008f0c8fa
R13: ffff888041e006ba R14: 0000000000000000 R15: ffff8880478647d0
FS:  0000555564599380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f951508c0f8 CR3: 000000003d7f4000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_truncate_folios fs/bcachefs/fs-io.c:354 [inline]
 bchfs_fpunch+0x115/0x780 fs/bcachefs/fs-io.c:508
 bch2_fallocate_dispatch+0x3e4/0x540 fs/bcachefs/fs-io.c:773
 vfs_fallocate+0x569/0x6e0 fs/open.c:333
 ksys_fallocate fs/open.c:356 [inline]
 __do_sys_fallocate fs/open.c:364 [inline]
 __se_sys_fallocate fs/open.c:362 [inline]
 __x64_sys_fallocate+0xbd/0x110 fs/open.c:362
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f951500ed59
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe957ae9b8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f951500ed59
RDX: 0000000000000df6 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f95150885f0 R08: 000055556459a4c0 R09: 000055556459a4c0
R10: 000000000000cee8 R11: 0000000000000246 R12: 00007ffe957ae9e0
R13: 00007ffe957aec08 R14: 431bde82d7b634db R15: 00007f951505803b
 </TASK>