F2FS-fs (loop1): invalid crc value
F2FS-fs (loop1): Found nat_bits in checkpoint
F2FS-fs (loop1): Start checkpoint disabled!
F2FS-fs (loop1): Mounted with checkpoint version = 48b305e6
------------[ cut here ]------------
kernel BUG at fs/f2fs/segment.c:3481!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 7598 Comm: syz.1.561 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:f2fs_allocate_data_block+0x3fa1/0x3fd0 fs/f2fs/segment.c:3481
Code: 72 12 fe 49 8d 57 1c e9 8a e1 ff ff e8 b8 fd b9 fd 48 c7 c7 30 4d 71 8d 4c 89 f6 e8 79 6d 97 00 e9 a6 e1 ff ff e8 9f fd b9 fd <0f> 0b e8 98 fd b9 fd 0f 0b e8 91 fd b9 fd 0f 0b e8 8a fd b9 fd 0f
RSP: 0018:ffffc9000397f410 EFLAGS: 00010287
RAX: ffffffff83cce7b1 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000d2ca000 RSI: 0000000000029620 RDI: 0000000000029621
RBP: 0000000000000200 R08: ffff8880571ab85f R09: 1ffff1100ae3570b
R10: dffffc0000000000 R11: ffffed100ae3570c R12: ffff88805f12cf64
R13: ffff88805f12c168 R14: 0000000000001a00 R15: dffffc0000000000
FS:  00007fda1ca046c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fda1bbeb540 CR3: 00000000622e9000 CR4: 00000000003506f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __allocate_data_block fs/f2fs/data.c:1427 [inline]
 f2fs_map_blocks+0x13ec/0x4080 fs/f2fs/data.c:1630
 f2fs_expand_inode_data+0x669/0xa00 fs/f2fs/file.c:1851
 f2fs_fallocate+0x41c/0x8f0 fs/f2fs/file.c:1954
 vfs_fallocate+0x585/0x6f0 fs/open.c:324
 ioctl_preallocate fs/ioctl.c:291 [inline]
 file_ioctl fs/ioctl.c:331 [inline]
 do_vfs_ioctl+0x19ef/0x1cc0 fs/ioctl.c:850
 __do_sys_ioctl fs/ioctl.c:869 [inline]
 __se_sys_ioctl+0x83/0x170 fs/ioctl.c:857
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fda1bb9de59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fda1ca04028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fda1be25fa0 RCX: 00007fda1bb9de59
RDX: 00002000000005c0 RSI: 0000000040305828 RDI: 0000000000000004
RBP: 00007fda1bc33e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fda1be26038 R14: 00007fda1be25fa0 R15: 00007ffed5fc3cf8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_allocate_data_block+0x3fa1/0x3fd0 fs/f2fs/segment.c:3481
Code: 72 12 fe 49 8d 57 1c e9 8a e1 ff ff e8 b8 fd b9 fd 48 c7 c7 30 4d 71 8d 4c 89 f6 e8 79 6d 97 00 e9 a6 e1 ff ff e8 9f fd b9 fd <0f> 0b e8 98 fd b9 fd 0f 0b e8 91 fd b9 fd 0f 0b e8 8a fd b9 fd 0f
RSP: 0018:ffffc9000397f410 EFLAGS: 00010287
RAX: ffffffff83cce7b1 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000d2ca000 RSI: 0000000000029620 RDI: 0000000000029621
RBP: 0000000000000200 R08: ffff8880571ab85f R09: 1ffff1100ae3570b
R10: dffffc0000000000 R11: ffffed100ae3570c R12: ffff88805f12cf64
R13: ffff88805f12c168 R14: 0000000000001a00 R15: dffffc0000000000
FS:  00007fda1ca046c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f696a040ff8 CR3: 00000000622e9000 CR4: 00000000003506e0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000002
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400