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kernel BUG at fs/f2fs/f2fs.h:2521!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5318 Comm: syz.0.0 Not tainted 6.15.0-syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:dec_valid_block_count+0x3c5/0x3d0 fs/f2fs/f2fs.h:2521
Code: fe e9 3a fd ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 64 fd ff ff 4c 89 f7 e8 c6 86 2d fe e9 57 fd ff ff e8 1c 8c cb fd 90 <0f> 0b 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000d6b7108 EFLAGS: 00010293
RAX: ffffffff83f465b4 RBX: 00000000000003fa RCX: ffff888000d3a440
RDX: 0000000000000000 RSI: 00000000000003fa RDI: 00000000000000d4
RBP: 00000000fffffcda R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001ad6e10 R12: ffff888043370fa4
R13: dffffc0000000000 R14: 1ffff1100866e1f4 R15: ffff888043370000
FS:  00007f8dbec876c0(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056002cc7b6b0 CR3: 000000003fafa000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 f2fs_truncate_data_blocks_range+0xcda/0x11c0 fs/f2fs/file.c:695
 truncate_dnode+0x3f9/0x730 fs/f2fs/node.c:973
 truncate_nodes+0x76a/0xfb0 fs/f2fs/node.c:1014
 f2fs_truncate_inode_blocks+0x670/0xfa0 fs/f2fs/node.c:1197
 f2fs_do_truncate_blocks+0xbc3/0x11a0 fs/f2fs/file.c:810
 f2fs_truncate_blocks+0x10a/0x300 fs/f2fs/file.c:838
 f2fs_truncate+0x435/0x750 fs/f2fs/file.c:888
 f2fs_setattr+0xc24/0x12e0 fs/f2fs/file.c:1112
 notify_change+0xb36/0xe40 fs/attr.c:552
 do_truncate+0x19a/0x220 fs/open.c:65
 handle_truncate fs/namei.c:3501 [inline]
 do_open fs/namei.c:3884 [inline]
 path_openat+0x306c/0x3830 fs/namei.c:4039
 do_filp_open+0x1fa/0x410 fs/namei.c:4066
 do_sys_openat2+0x121/0x1c0 fs/open.c:1429
 do_sys_open fs/open.c:1444 [inline]
 __do_sys_creat fs/open.c:1522 [inline]
 __se_sys_creat fs/open.c:1516 [inline]
 __x64_sys_creat+0x8f/0xc0 fs/open.c:1516
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8dbdd8e969
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:00007f8dbec87038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
RAX: ffffffffffffffda RBX: 00007f8dbdfb6080 RCX: 00007f8dbdd8e969
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000200000000080
RBP: 00007f8dbde10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8dbdfb6080 R15: 00007ffc98ff4918
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dec_valid_block_count+0x3c5/0x3d0 fs/f2fs/f2fs.h:2521
Code: fe e9 3a fd ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 64 fd ff ff 4c 89 f7 e8 c6 86 2d fe e9 57 fd ff ff e8 1c 8c cb fd 90 <0f> 0b 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000d6b7108 EFLAGS: 00010293
RAX: ffffffff83f465b4 RBX: 00000000000003fa RCX: ffff888000d3a440
RDX: 0000000000000000 RSI: 00000000000003fa RDI: 00000000000000d4
RBP: 00000000fffffcda R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001ad6e10 R12: ffff888043370fa4
R13: dffffc0000000000 R14: 1ffff1100866e1f4 R15: ffff888043370000
FS:  00007f8dbec876c0(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056002cc7b6b0 CR3: 000000003fafa000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400