xt_CHECKSUM: CHECKSUM should be avoided.  If really needed, restrict with "-p udp" and only use in OUTPUT
loop0: detected capacity change from 0 to 2048
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
EXT4-fs error (device loop0): ext4_mb_generate_buddy:1220: group 0, block bitmap and bg descriptor inconsistent: 25 vs 150994969 free clusters
------------[ cut here ]------------
kernel BUG at fs/ext4/inline.c:235!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5326 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-03657-g43fb83c17ba2 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ext4_write_inline_data fs/ext4/inline.c:235 [inline]
RIP: 0010:ext4_write_inline_data_end+0xea2/0x1020 fs/ext4/inline.c:774
Code: 31 ff e8 11 a8 35 ff 48 89 d8 48 25 ff 0f 00 00 74 70 e8 21 a3 35 ff e9 12 f8 ff ff e8 17 a3 35 ff 90 0f 0b e8 0f a3 35 ff 90 <0f> 0b 48 8b 5c 24 18 48 89 df be 08 00 00 00 e8 3a ba 9f ff 48 c1
RSP: 0018:ffffc9000d27f860 EFLAGS: 00010293
RAX: ffffffff825f55c1 RBX: 000000000000003c RCX: ffff888000a28000
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000010000000006
RBP: ffffc9000d27f988 R08: ffffffff825f4b1a R09: 1ffff110085c8070
R10: dffffc0000000000 R11: ffffed10085c8071 R12: ffff888043d4579a
R13: 0000010000000005 R14: 0000010000000006 R15: 0000000000000001
FS:  00007f5c7990b6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c6dbbd000 CR3: 000000004330c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 generic_perform_write+0x4db/0x6d0 mm/filemap.c:4071
 ext4_buffered_write_iter+0xc5/0x350 fs/ext4/file.c:299
 ext4_file_write_iter+0x892/0x1c50
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xaeb/0xd30 fs/read_write.c:679
 ksys_pwrite64 fs/read_write.c:786 [inline]
 __do_sys_pwrite64 fs/read_write.c:794 [inline]
 __se_sys_pwrite64 fs/read_write.c:791 [inline]
 __x64_sys_pwrite64+0x1ac/0x240 fs/read_write.c:791
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5c78b7e819
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:00007f5c7990b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f5c78d35fa0 RCX: 00007f5c78b7e819
RDX: 0000000000000001 RSI: 0000000020000300 RDI: 0000000000000006
RBP: 00007f5c78bf175e R08: 0000000000000000 R09: 0000000000000000
R10: 0000010000000005 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f5c78d35fa0 R15: 00007ffc6c27b6f8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_write_inline_data fs/ext4/inline.c:235 [inline]
RIP: 0010:ext4_write_inline_data_end+0xea2/0x1020 fs/ext4/inline.c:774
Code: 31 ff e8 11 a8 35 ff 48 89 d8 48 25 ff 0f 00 00 74 70 e8 21 a3 35 ff e9 12 f8 ff ff e8 17 a3 35 ff 90 0f 0b e8 0f a3 35 ff 90 <0f> 0b 48 8b 5c 24 18 48 89 df be 08 00 00 00 e8 3a ba 9f ff 48 c1
RSP: 0018:ffffc9000d27f860 EFLAGS: 00010293
RAX: ffffffff825f55c1 RBX: 000000000000003c RCX: ffff888000a28000
RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000010000000006
RBP: ffffc9000d27f988 R08: ffffffff825f4b1a R09: 1ffff110085c8070
R10: dffffc0000000000 R11: ffffed10085c8071 R12: ffff888043d4579a
R13: 0000010000000005 R14: 0000010000000006 R15: 0000000000000001
FS:  00007f5c7990b6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5c798e9fe0 CR3: 000000004330c000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400