------------[ cut here ]------------
kernel BUG at fs/f2fs/file.c:824!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5361 Comm: syz.0.0 Not tainted 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:f2fs_do_truncate_blocks+0x1075/0x10c0 fs/f2fs/file.c:824
Code: 27 fd 90 0f 0b e8 bb 09 bf fd 90 0f 0b e8 b3 09 bf fd 48 89 df 48 c7 c6 40 8f d1 8b e8 d4 47 27 fd 90 0f 0b e8 9c 09 bf fd 90 <0f> 0b e8 94 09 bf fd 90 0f 0b 90 e9 dd fd ff ff e8 86 09 bf fd 90
RSP: 0018:ffffc9000d44f580 EFLAGS: 00010283
RAX: ffffffff8400b4b4 RBX: 0000000000000006 RCX: 0000000000100000
RDX: ffffc9000ecfb000 RSI: 00000000000f4f2b RDI: 00000000000f4f2c
RBP: ffffc9000d44f698 R08: ffff888043b42887 R09: 1ffff11008768510
R10: dffffc0000000000 R11: ffffed1008768511 R12: 00000000000003b4
R13: 0000000000000714 R14: 0000000000000001 R15: 00000000ffffffac
FS:  00007fdc973946c0(0000) GS:ffff88808d20c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fdc8abff000 CR3: 0000000042ce6000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 f2fs_truncate_blocks+0x10a/0x300 fs/f2fs/file.c:861
 f2fs_write_failed+0x124/0x190 fs/f2fs/data.c:3335
 f2fs_write_begin+0x1d4a/0x2290 fs/f2fs/data.c:3665
 generic_perform_write+0x2c2/0x900 mm/filemap.c:4175
 f2fs_buffered_write_iter fs/f2fs/file.c:5007 [inline]
 f2fs_file_write_iter+0x1ec9/0x2410 fs/f2fs/file.c:5235
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x5c9/0xb30 fs/read_write.c:686
 ksys_write+0x145/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc9658ebe9
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:00007fdc97394038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fdc967c6090 RCX: 00007fdc9658ebe9
RDX: 00000000fffffec6 RSI: 0000200000000180 RDI: 0000000000000006
RBP: 00007fdc96611e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdc967c6128 R14: 00007fdc967c6090 R15: 00007ffd0d8dea88
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f2fs_do_truncate_blocks+0x1075/0x10c0 fs/f2fs/file.c:824
Code: 27 fd 90 0f 0b e8 bb 09 bf fd 90 0f 0b e8 b3 09 bf fd 48 89 df 48 c7 c6 40 8f d1 8b e8 d4 47 27 fd 90 0f 0b e8 9c 09 bf fd 90 <0f> 0b e8 94 09 bf fd 90 0f 0b 90 e9 dd fd ff ff e8 86 09 bf fd 90
RSP: 0018:ffffc9000d44f580 EFLAGS: 00010283
RAX: ffffffff8400b4b4 RBX: 0000000000000006 RCX: 0000000000100000
RDX: ffffc9000ecfb000 RSI: 00000000000f4f2b RDI: 00000000000f4f2c
RBP: ffffc9000d44f698 R08: ffff888043b42887 R09: 1ffff11008768510
R10: dffffc0000000000 R11: ffffed1008768511 R12: 00000000000003b4
R13: 0000000000000714 R14: 0000000000000001 R15: 00000000ffffffac
FS:  00007fdc973946c0(0000) GS:ffff88808d20c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564cbc3a4168 CR3: 0000000042ce6000 CR4: 0000000000352ef0