------------[ cut here ]------------
WARNING: CPU: 0 PID: 6312 at fs/bcachefs/fs-io.c:327 __bch2_truncate_folio+0x1a33/0x1d80 fs/bcachefs/fs-io.c:327
Modules linked in:
CPU: 0 PID: 6312 Comm: syz-executor.0 Not tainted 6.9.0-syzkaller-10323-g8f6a15f095a6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:__bch2_truncate_folio+0x1a33/0x1d80 fs/bcachefs/fs-io.c:327
Code: 41 5f 5d c3 cc cc cc cc e8 ea d1 6e fd 48 c7 c7 86 02 c0 8d e8 4e 1c ea ff 89 05 38 dd 69 10 e9 ed ea ff ff e8 ce d1 6e fd 90 <0f> 0b 90 e9 0a fa ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c f0
RSP: 0018:ffffc9000949f6c0 EFLAGS: 00010283
RAX: ffffffff84275f32 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc9000ade7000 RSI: 0000000000004d8b RDI: 0000000000004d8c
RBP: ffffc9000949f950 R08: ffffffff84275937 R09: 1ffffd40001296b0
R10: dffffc0000000000 R11: fffff940001296b1 R12: 1ffff1100bbfd772
R13: ffff888059e8075a R14: 0000000000000000 R15: ffff88805dfebb90
FS:  00007efe2767c6c0(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000140 CR3: 000000002bf08000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_truncate_folios fs/bcachefs/fs-io.c:366 [inline]
 bchfs_fpunch fs/bcachefs/fs-io.c:520 [inline]
 bch2_fallocate_dispatch+0x6fb/0x3810 fs/bcachefs/fs-io.c:785
 vfs_fallocate+0x564/0x6c0 fs/open.c:330
 ksys_fallocate fs/open.c:353 [inline]
 __do_sys_fallocate fs/open.c:361 [inline]
 __se_sys_fallocate fs/open.c:359 [inline]
 __x64_sys_fallocate+0xbd/0x110 fs/open.c:359
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7efe2687cee9
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:00007efe2767c0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007efe269ac050 RCX: 00007efe2687cee9
RDX: 0000000000000174 RSI: 0000000000000003 RDI: 0000000000000005
RBP: 00007efe268c949e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000010000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007efe269ac050 R15: 00007ffdd22b7968
 </TASK>