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:3489!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 6183 Comm: syz.1.94 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:f2fs_allocate_data_block+0x3fa1/0x3fd0 fs/f2fs/segment.c:3489
Code: f6 11 fe 49 8d 57 1c e9 8a e1 ff ff e8 68 75 b9 fd 48 c7 c7 50 63 71 8d 4c 89 f6 e8 a9 0b 99 00 e9 a6 e1 ff ff e8 4f 75 b9 fd <0f> 0b e8 48 75 b9 fd 0f 0b e8 41 75 b9 fd 0f 0b e8 3a 75 b9 fd 0f
RSP: 0018:ffffc9000b897410 EFLAGS: 00010287
RAX: ffffffff83ce0d21 RBX: 0000000000000202 RCX: 0000000000080000
RDX: ffffc9000d1e9000 RSI: 0000000000029e69 RDI: 0000000000029e6a
RBP: 0000000000000200 R08: ffff888030b3885f R09: 1ffff1100616710b
R10: dffffc0000000000 R11: ffffed100616710c R12: ffff8880774e4f64
R13: ffff8880774e4168 R14: 0000000000003602 R15: dffffc0000000000
FS:  00007f21fcdc96c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa7a7b97000 CR3: 000000005be64000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 __allocate_data_block fs/f2fs/data.c:1456 [inline]
 f2fs_map_blocks+0x13ec/0x4080 fs/f2fs/data.c:1659
 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
 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: 0033:0x7f21fbf9e159
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:00007f21fcdc9028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f21fc225fa0 RCX: 00007f21fbf9e159
RDX: 00002000000000c0 RSI: 0000000040305828 RDI: 0000000000000007
RBP: 00007f21fc03503b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f21fc226038 R14: 00007f21fc225fa0 R15: 00007ffcd11ab588
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_allocate_data_block+0x3fa1/0x3fd0 fs/f2fs/segment.c:3489
Code: f6 11 fe 49 8d 57 1c e9 8a e1 ff ff e8 68 75 b9 fd 48 c7 c7 50 63 71 8d 4c 89 f6 e8 a9 0b 99 00 e9 a6 e1 ff ff e8 4f 75 b9 fd <0f> 0b e8 48 75 b9 fd 0f 0b e8 41 75 b9 fd 0f 0b e8 3a 75 b9 fd 0f
RSP: 0018:ffffc9000b897410 EFLAGS: 00010287
RAX: ffffffff83ce0d21 RBX: 0000000000000202 RCX: 0000000000080000
RDX: ffffc9000d1e9000 RSI: 0000000000029e69 RDI: 0000000000029e6a
RBP: 0000000000000200 R08: ffff888030b3885f R09: 1ffff1100616710b
R10: dffffc0000000000 R11: ffffed100616710c R12: ffff8880774e4f64
R13: ffff8880774e4168 R14: 0000000000003602 R15: dffffc0000000000
FS:  00007f21fcdc96c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f533c5872c0 CR3: 000000005be64000 CR4: 00000000003506e0