F2FS-fs (loop5): invalid crc value
F2FS-fs (loop5): Found nat_bits in checkpoint
F2FS-fs (loop5): Start checkpoint disabled!
F2FS-fs (loop5): 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: 15446 Comm: syz.5.3077 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/25/2026
RIP: 0010:f2fs_allocate_data_block+0x3fa1/0x3fd0 fs/f2fs/segment.c:3481
Code: 67 12 fe 49 8d 57 1c e9 8a e1 ff ff e8 18 f0 b9 fd 48 c7 c7 b0 4f 71 8d 4c 89 f6 e8 b9 76 97 00 e9 a6 e1 ff ff e8 ff ef b9 fd <0f> 0b e8 f8 ef b9 fd 0f 0b e8 f1 ef b9 fd 0f 0b e8 ea ef b9 fd 0f
RSP: 0018:ffffc90003527850 EFLAGS: 00010287
RAX: ffffffff83ccf571 RBX: 0000000000000201 RCX: 0000000000080000
RDX: ffffc900116c7000 RSI: 000000000002a413 RDI: 000000000002a414
RBP: 0000000000000200 R08: ffff888026a3045f R09: 1ffff11004d4608b
R10: dffffc0000000000 R11: ffffed1004d4608c R12: ffff888068ae4f64
R13: ffff888068ae4168 R14: 0000000000002201 R15: dffffc0000000000
FS:  00007fa37dae56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c38aaca CR3: 0000000075df3000 CR4: 00000000003506f0
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+0x6e7/0xa90 fs/f2fs/file.c:1858
 f2fs_fallocate+0x41c/0x8f0 fs/f2fs/file.c:1961
 vfs_fallocate+0x585/0x6f0 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:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa37cb9de59
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:00007fa37dae5028 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fa37ce25fa0 RCX: 00007fa37cb9de59
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007fa37cc33e6f R08: 0000000000000000 R09: 0000000000000000
R10: 00000000001000f4 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa37ce26038 R14: 00007fa37ce25fa0 R15: 00007ffcbe3a27e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_allocate_data_block+0x3fa1/0x3fd0 fs/f2fs/segment.c:3481
Code: 67 12 fe 49 8d 57 1c e9 8a e1 ff ff e8 18 f0 b9 fd 48 c7 c7 b0 4f 71 8d 4c 89 f6 e8 b9 76 97 00 e9 a6 e1 ff ff e8 ff ef b9 fd <0f> 0b e8 f8 ef b9 fd 0f 0b e8 f1 ef b9 fd 0f 0b e8 ea ef b9 fd 0f
RSP: 0018:ffffc90003527850 EFLAGS: 00010287
RAX: ffffffff83ccf571 RBX: 0000000000000201 RCX: 0000000000080000
RDX: ffffc900116c7000 RSI: 000000000002a413 RDI: 000000000002a414
RBP: 0000000000000200 R08: ffff888026a3045f R09: 1ffff11004d4608b
R10: dffffc0000000000 R11: ffffed1004d4608c R12: ffff888068ae4f64
R13: ffff888068ae4168 R14: 0000000000002201 R15: dffffc0000000000
FS:  00007fa37dae56c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa37cbeb540 CR3: 0000000075df3000 CR4: 00000000003506f0