------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2809!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 7515 Comm: syz.0.362 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:ext4_do_writepages+0x4607/0x4610 fs/ext4/inode.c:2808
Code: c6 40 84 be 8b e8 a9 96 b2 fe 90 0f 0b e8 21 52 4a ff 4c 89 f7 48 c7 c6 20 88 be 8b e8 92 96 b2 fe 90 0f 0b e8 0a 52 4a 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:ffffc90002e769e0 EFLAGS: 00010287
RAX: ffffffff82756966 RBX: 0000004210000000 RCX: 0000000000080000
RDX: ffffc90004722000 RSI: 0000000000000d5e RDI: 0000000000000d5f
RBP: ffffc90002e76e10 R08: ffff88804e825ff7 R09: 1ffff11009d04bfe
R10: dffffc0000000000 R11: ffffed1009d04bff R12: 0000000000000001
R13: ffffc90002e76e60 R14: 0000004000000000 R15: dffffc0000000000
FS:  00007fc4b2af66c0(0000) GS:ffff888125ae8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe8b4889f98 CR3: 0000000077db0000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x205/0x350 fs/ext4/inode.c:3025
 do_writepages+0x32e/0x550 mm/page-writeback.c:2604
 filemap_fdatawrite_wbc mm/filemap.c:389 [inline]
 __filemap_fdatawrite_range mm/filemap.c:422 [inline]
 filemap_write_and_wait_range+0x21f/0x320 mm/filemap.c:694
 filemap_invalidate_pages mm/filemap.c:2834 [inline]
 kiocb_invalidate_pages+0xb4/0x140 mm/filemap.c:2853
 __iomap_dio_rw+0x9f8/0x1e30 fs/iomap/direct-io.c:697
 iomap_dio_rw+0x45/0xb0 fs/iomap/direct-io.c:817
 ext4_dio_write_iter fs/ext4/file.c:580 [inline]
 ext4_file_write_iter+0x16a2/0x1bc0 fs/ext4/file.c:721
 iter_file_splice_write+0x975/0x10e0 fs/splice.c:738
 do_splice_from fs/splice.c:938 [inline]
 direct_splice_actor+0x101/0x160 fs/splice.c:1161
 splice_direct_to_actor+0x5a8/0xcc0 fs/splice.c:1105
 do_splice_direct_actor fs/splice.c:1204 [inline]
 do_splice_direct+0x181/0x270 fs/splice.c:1230
 do_sendfile+0x4da/0x7e0 fs/read_write.c:1370
 __do_sys_sendfile64 fs/read_write.c:1431 [inline]
 __se_sys_sendfile64+0x13e/0x190 fs/read_write.c:1417
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc4b1b8eba9
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:00007fc4b2af6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fc4b1dd5fa0 RCX: 00007fc4b1b8eba9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005
RBP: 00007fc4b1c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc4b1dd6038 R14: 00007fc4b1dd5fa0 R15: 00007ffc2c554978
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x4607/0x4610 fs/ext4/inode.c:2808
Code: c6 40 84 be 8b e8 a9 96 b2 fe 90 0f 0b e8 21 52 4a ff 4c 89 f7 48 c7 c6 20 88 be 8b e8 92 96 b2 fe 90 0f 0b e8 0a 52 4a 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:ffffc90002e769e0 EFLAGS: 00010287
RAX: ffffffff82756966 RBX: 0000004210000000 RCX: 0000000000080000
RDX: ffffc90004722000 RSI: 0000000000000d5e RDI: 0000000000000d5f
RBP: ffffc90002e76e10 R08: ffff88804e825ff7 R09: 1ffff11009d04bfe
R10: dffffc0000000000 R11: ffffed1009d04bff R12: 0000000000000001
R13: ffffc90002e76e60 R14: 0000004000000000 R15: dffffc0000000000
FS:  00007fc4b2af66c0(0000) GS:ffff888125ae8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6dd73f2b60 CR3: 0000000077db0000 CR4: 00000000003526f0