loop4: detected capacity change from 0 to 1024
EXT4-fs (loop4): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: none.
------------[ cut here ]------------
kernel BUG at fs/ext4/ext4_jbd2.c:53!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 8262 Comm: syz.4.452 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline]
RIP: 0010:__ext4_journal_stop+0x190/0x1a0 fs/ext4/ext4_jbd2.c:125
Code: e8 55 2a 47 ff e9 f8 fe ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 10 ff ff ff e8 db fa b0 ff e9 06 ff ff ff e8 31 2a 47 ff 90 <0f> 0b 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90
RSP: 0018:ffffc9000fb8f6c0 EFLAGS: 00010293
RAX: ffffffff827e739f RBX: 0000000000000000 RCX: ffff88802903dac0
RDX: 0000000000000000 RSI: 0000000000000354 RDI: ffffffff8dff1176
RBP: ffffc9000fb8f7e8 R08: ffffffff90112cb7 R09: 1ffffffff2022596
R10: dffffc0000000000 R11: fffffbfff2022597 R12: 0000000000000002
R13: 0000000000000354 R14: ffffffff8dff1176 R15: ffff888059d14f58
FS:  00007f72a35c76c0(0000) GS:ffff88812556d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001580 CR3: 0000000029e28000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_write_inline_data_end+0x7c0/0xad0 fs/ext4/inline.c:852
 generic_perform_write+0x620/0x8f0 mm/filemap.c:4335
 ext4_buffered_write_iter+0xce/0x3a0 fs/ext4/file.c:300
 ext4_file_write_iter+0x298/0x1bf0 fs/ext4/file.c:-1
 do_iter_readv_writev+0x619/0x8c0 fs/read_write.c:-1
 vfs_writev+0x33c/0x990 fs/read_write.c:1059
 do_pwritev fs/read_write.c:1155 [inline]
 __do_sys_pwritev2 fs/read_write.c:1213 [inline]
 __se_sys_pwritev2+0x184/0x2a0 fs/read_write.c:1204
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f72a279aeb9
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:00007f72a35c7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f72a2a15fa0 RCX: 00007f72a279aeb9
RDX: 0000000000000002 RSI: 0000200000000000 RDI: 0000000000000004
RBP: 00007f72a2808c1f R08: 0000000001020884 R09: 0000000000000012
R10: 0000000001002020 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f72a2a16038 R14: 00007f72a2a15fa0 R15: 00007fffc719f8c8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_put_nojournal fs/ext4/ext4_jbd2.c:53 [inline]
RIP: 0010:__ext4_journal_stop+0x190/0x1a0 fs/ext4/ext4_jbd2.c:125
Code: e8 55 2a 47 ff e9 f8 fe ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 10 ff ff ff e8 db fa b0 ff e9 06 ff ff ff e8 31 2a 47 ff 90 <0f> 0b 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90
RSP: 0018:ffffc9000fb8f6c0 EFLAGS: 00010293
RAX: ffffffff827e739f RBX: 0000000000000000 RCX: ffff88802903dac0
RDX: 0000000000000000 RSI: 0000000000000354 RDI: ffffffff8dff1176
RBP: ffffc9000fb8f7e8 R08: ffffffff90112cb7 R09: 1ffffffff2022596
R10: dffffc0000000000 R11: fffffbfff2022597 R12: 0000000000000002
R13: 0000000000000354 R14: ffffffff8dff1176 R15: ffff888059d14f58
FS:  00007f72a35c76c0(0000) GS:ffff88812556d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f72a27e8600 CR3: 0000000029e28000 CR4: 00000000003526f0