------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2810!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 0 UID: 0 PID: 6374 Comm: syz.3.64 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
RIP: 0010:ext4_do_writepages+0x45f7/0x4600 fs/ext4/inode.c:2809
Code: c6 c0 30 23 8b e8 e9 e0 b4 fe 90 0f 0b e8 91 8f 4e ff 4c 89 f7 48 c7 c6 a0 35 23 8b e8 d2 e0 b4 fe 90 0f 0b e8 7a 8f 4e ff 90 <0f> 0b 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000618f460 EFLAGS: 00010293
RAX: ffffffff8272cfc6 RBX: 0000004a10000000 RCX: ffff88802e5c1e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000618f870 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100787f482 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff11005ef3cf3
FS:  0000555578204500(0000) GS:ffff8881267fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faed013f000 CR3: 0000000033dda000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3026
 do_writepages+0x32e/0x550 mm/page-writeback.c:2598
 filemap_writeback mm/filemap.c:387 [inline]
 filemap_flush_range mm/filemap.c:436 [inline]
 filemap_flush+0x1e4/0x2f0 mm/filemap.c:451
 ext4_release_file+0x82/0x310 fs/ext4/file.c:169
 __fput+0x45e/0xa80 fs/file_table.c:468
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:44 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff810dcacb9
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:00007ffe1845ab08 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffe1845abf0 RCX: 00007ff810dcacb9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00000000000201b7 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2e820000 R11: 0000000000000246 R12: 00007ffe1845ac30
R13: 00007ff811045fac R14: 000000000002087a R15: 00007ff811045fa0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x45f7/0x4600 fs/ext4/inode.c:2809
Code: c6 c0 30 23 8b e8 e9 e0 b4 fe 90 0f 0b e8 91 8f 4e ff 4c 89 f7 48 c7 c6 a0 35 23 8b e8 d2 e0 b4 fe 90 0f 0b e8 7a 8f 4e ff 90 <0f> 0b 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000618f460 EFLAGS: 00010293
RAX: ffffffff8272cfc6 RBX: 0000004a10000000 RCX: ffff88802e5c1e40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000618f870 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100787f482 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff11005ef3cf3
FS:  0000555578204500(0000) GS:ffff8881267fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007faed013f000 CR3: 0000000033dda000 CR4: 00000000003526f0