------------[ cut here ]------------
WARNING: CPU: 1 PID: 7987 at fs/bcachefs/fs-io.c:361 __bch2_truncate_folio+0x15dc/0x1850 fs/bcachefs/fs-io.c:361
Modules linked in:
CPU: 1 UID: 0 PID: 7987 Comm: syz.5.227 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __bch2_truncate_folio+0x15dc/0x1850 fs/bcachefs/fs-io.c:361
lr : __bch2_truncate_folio+0x15dc/0x1850 fs/bcachefs/fs-io.c:361
sp : ffff80009f877820
x29: ffff80009f8779e0 x28: dfff800000000000 x27: ffff80009f8778a0
x26: 0000000000000001 x25: 1fffe0001e7e00d4 x24: 1fffe0001e7311f0
x23: ffff700013f0ef14 x22: 000000000000000f x21: 0000000000000000
x20: ffff0000f3988f80 x19: 0000000000000000 x18: 0000000000000000
x17: ffff0001fea8d8b0 x16: ffff80008052ac24 x15: 0000000000000001
x14: 1fffffbff878c9d8 x13: 0000000000000000 x12: 0000000000000000
x11: ffff7fbff878c9d9 x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000c8573d00 x7 : ffff800080230f74 x6 : ffff800080231170
x5 : ffff0000f2ac12c0 x4 : 0000000000000001 x3 : ffff80009f877990
x2 : 0000000020000000 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 __bch2_truncate_folio+0x15dc/0x1850 fs/bcachefs/fs-io.c:361 (P)
 bch2_truncate_folios fs/bcachefs/fs-io.c:400 [inline]
 bchfs_fpunch+0x108/0x404 fs/bcachefs/fs-io.c:564
 bch2_fallocate_dispatch+0x2d4/0x434 fs/bcachefs/fs-io.c:838
 vfs_fallocate+0x52c/0x668 fs/open.c:342
 ksys_fallocate fs/open.c:366 [inline]
 __do_sys_fallocate fs/open.c:371 [inline]
 __se_sys_fallocate fs/open.c:369 [inline]
 __arm64_sys_fallocate+0xbc/0x10c fs/open.c:369
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 98
hardirqs last  enabled at (97): [<ffff8000805ba5a8>] __call_rcu_common kernel/rcu/tree.c:3148 [inline]
hardirqs last  enabled at (97): [<ffff8000805ba5a8>] call_rcu+0x65c/0x978 kernel/rcu/tree.c:3243
hardirqs last disabled at (98): [<ffff80008b019ab4>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434
softirqs last  enabled at (8): [<ffff800080201608>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (6): [<ffff8000802015d4>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---