loop0: detected capacity change from 0 to 40427
F2FS-fs (loop0): invalid crc value
F2FS-fs (loop0): Found nat_bits in checkpoint
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5
------------[ cut here ]------------
kernel BUG at fs/f2fs/segment.c:3475!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6578 Comm: syz.0.16 Not tainted 6.6.94-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:f2fs_allocate_data_block+0x3f0c/0x3f50 fs/f2fs/segment.c:3475
Code: 22 fe 48 8b 54 24 30 e9 c6 eb ff ff e8 cd 59 c9 fd 48 c7 c7 30 d6 2f 8d 4c 89 f6 e8 4e f6 95 00 e9 e2 eb ff ff e8 b4 59 c9 fd <0f> 0b e8 ad 59 c9 fd 0f 0b e8 a6 59 c9 fd 0f 0b e8 9f 59 c9 fd 0f
RSP: 0018:ffffc900035a7850 EFLAGS: 00010293
RAX: ffffffff83bc3c1c RBX: 0000000000000201 RCX: ffff88807c4a9e00
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000200
RBP: 0000000000000200 R08: ffff88801f72505f R09: 1ffff11003ee4a0b
R10: dffffc0000000000 R11: ffffed1003ee4a0c R12: 1ffff920006b4f7c
R13: 0000000000000000 R14: 0000000000001a01 R15: dffffc0000000000
FS:  00007fa9598096c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f69c1313f0 CR3: 00000000768ac000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __allocate_data_block fs/f2fs/data.c:1421 [inline]
 f2fs_map_blocks+0x1697/0x3c00 fs/f2fs/data.c:1601
 f2fs_expand_inode_data+0x543/0x8e0 fs/f2fs/file.c:1798
 f2fs_fallocate+0x416/0x8a0 fs/f2fs/file.c:1901
 vfs_fallocate+0x58e/0x700 fs/open.c:324
 ksys_fallocate fs/open.c:347 [inline]
 __do_sys_fallocate fs/open.c:355 [inline]
 __se_sys_fallocate fs/open.c:353 [inline]
 __x64_sys_fallocate+0xc1/0x110 fs/open.c:353
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa95898e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa959809038 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fa958bb5fa0 RCX: 00007fa95898e929
RDX: 000000000000fc01 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fa958a10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000001000f4 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa958bb5fa0 R15: 00007fffda9fd6c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_allocate_data_block+0x3f0c/0x3f50 fs/f2fs/segment.c:3475
Code: 22 fe 48 8b 54 24 30 e9 c6 eb ff ff e8 cd 59 c9 fd 48 c7 c7 30 d6 2f 8d 4c 89 f6 e8 4e f6 95 00 e9 e2 eb ff ff e8 b4 59 c9 fd <0f> 0b e8 ad 59 c9 fd 0f 0b e8 a6 59 c9 fd 0f 0b e8 9f 59 c9 fd 0f
RSP: 0018:ffffc900035a7850 EFLAGS: 00010293
RAX: ffffffff83bc3c1c RBX: 0000000000000201 RCX: ffff88807c4a9e00
RDX: 0000000000000000 RSI: 0000000000000201 RDI: 0000000000000200
RBP: 0000000000000200 R08: ffff88801f72505f R09: 1ffff11003ee4a0b
R10: dffffc0000000000 R11: ffffed1003ee4a0c R12: 1ffff920006b4f7c
R13: 0000000000000000 R14: 0000000000001a01 R15: dffffc0000000000
FS:  00007fa9598096c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb7abd0a6b0 CR3: 00000000768ac000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400