------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2734!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 5349 Comm: syz.1.160 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:ext4_writepages+0x2d12/0x2d20 fs/ext4/inode.c:2733
Code: c1 03 38 c1 0f 8c b0 fd ff ff 4c 89 e7 e8 c6 c8 b2 ff e9 a3 fd ff ff e8 2c 60 6e ff 0f 0b e8 25 60 6e ff 0f 0b e8 1e 60 6e ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 41 56 53 48 89 fb
RSP: 0018:ffffc9000323f780 EFLAGS: 00010293
RAX: ffffffff82096bf2 RBX: 000000d41000c000 RCX: ffff8880791b3b80
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000323fad0 R08: dffffc0000000000 R09: ffffed100be84a03
R10: ffffed100be84a03 R11: 1ffff1100be84a02 R12: 1ffff92000647f98
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff88805be4e000
FS:  000055556c510500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78d54ef000 CR3: 0000000063162000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x48d/0x6d0 mm/page-writeback.c:2386
 filemap_fdatawrite_wbc+0x1eb/0x240 mm/filemap.c:400
 __filemap_fdatawrite_range mm/filemap.c:433 [inline]
 __filemap_fdatawrite mm/filemap.c:439 [inline]
 filemap_flush+0xb3/0x100 mm/filemap.c:466
 ext4_release_file+0x7e/0x310 fs/ext4/file.c:141
 __fput+0x234/0x930 fs/file_table.c:311
 task_work_run+0x125/0x1a0 kernel/task_work.c:188
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
 exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:214
 __syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
 syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
 do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f737f437749
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:00007ffe98512698 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f737f68fda0 RCX: 00007f737f437749
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f737f68fda0 R08: 0000000000000000 R09: 000000149851298f
R10: 000000000003fd0c R11: 0000000000000246 R12: 000000000001d947
R13: 00007f737f68e090 R14: ffffffffffffffff R15: 00007ffe985127b0
 </TASK>
Modules linked in:
---[ end trace 29e1e4da5e564fc4 ]---
RIP: 0010:ext4_writepages+0x2d12/0x2d20 fs/ext4/inode.c:2733
Code: c1 03 38 c1 0f 8c b0 fd ff ff 4c 89 e7 e8 c6 c8 b2 ff e9 a3 fd ff ff e8 2c 60 6e ff 0f 0b e8 25 60 6e ff 0f 0b e8 1e 60 6e ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 66 90 41 57 41 56 53 48 89 fb
RSP: 0018:ffffc9000323f780 EFLAGS: 00010293
RAX: ffffffff82096bf2 RBX: 000000d41000c000 RCX: ffff8880791b3b80
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc9000323fad0 R08: dffffc0000000000 R09: ffffed100be84a03
R10: ffffed100be84a03 R11: 1ffff1100be84a02 R12: 1ffff92000647f98
R13: dffffc0000000000 R14: 0000008000000000 R15: ffff88805be4e000
FS:  000055556c510500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555569afb5c8 CR3: 0000000063162000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400