el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
F2FS-fs (loop6): __update_extent_tree_range: extent len is zero, type: 0, extent [0, 0, 0], age [0, 0]
------------[ cut here ]------------
kernel BUG at fs/f2fs/extent_cache.c:678!
Internal error: Oops - BUG: 00000000f2000800 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 10367 Comm: syz.6.755 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 63400005 (nZCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : __update_extent_tree_range+0x10f8/0x12a4 fs/f2fs/extent_cache.c:674
lr : __update_extent_tree_range+0x10f8/0x12a4 fs/f2fs/extent_cache.c:674
sp : ffff80009bd577e0
x29: ffff80009bd57970 x28: dfff800000000000 x27: 00000000ffffff8b
x26: ffff0000dd55a0d0 x25: dfff800000000000 x24: 0000001000000202
x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000000
x20: ffff80009bd579f0 x19: 0000000000000000 x18: 00000000ffffffff
x17: 2c6f72657a207369 x16: ffff800082dee3c0 x15: 0000000000000001
x14: 1ffff000137aae50 x13: 0000000000000000 x12: 0000000000000000
x11: 0000000000080000 x10: 000000000001eca4 x9 : fcca223fc2f0e100
x8 : fcca223fc2f0e100 x7 : ffff800080565bcc x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000807d6fd0
x2 : 0000000000000001 x1 : 0000000100000000 x0 : 0000000000000066
Call trace:
 __update_extent_tree_range+0x10f8/0x12a4 fs/f2fs/extent_cache.c:674 (P)
 f2fs_update_read_extent_cache_range+0x138/0x2e0 fs/f2fs/extent_cache.c:1085
 f2fs_do_zero_range fs/f2fs/file.c:1657 [inline]
 f2fs_zero_range+0x858/0xc80 fs/f2fs/file.c:1737
 f2fs_fallocate+0x408/0x8ec fs/f2fs/file.c:2030
 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+0xe8/0x23c 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:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
Code: f9405fe5 2a1303e6 a90023f5 97fc64bf (d4210000) 
---[ end trace 0000000000000000 ]---