------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2749!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1568 Comm: syz-executor.4 Not tainted 6.1.68-syzkaller-1150795-g8c0f9174731d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:ext4_writepages+0x3fab/0x3fd0 fs/ext4/inode.c:2748
Code: 88 81 ff 31 ff 89 de e8 b3 88 81 ff 45 84 f6 75 2a e8 19 86 81 ff 49 bc 00 00 00 00 00 fc ff df e9 6e f6 ff ff e8 05 86 81 ff <0f> 0b e8 fe 85 81 ff e8 e5 af 0c ff e9 46 c3 ff ff e8 ef 85 81 ff
RSP: 0018:ffffc90000de7580 EFLAGS: 00010293
RAX: ffffffff81f3cfeb RBX: 0000008000000000 RCX: ffff88811c1e8000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc90000de7990 R08: ffffffff81f3974b R09: ffffed10240e550c
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88810f85e000
R13: ffff88812072a998 R14: 000000d410000000 R15: ffffc90000de7860
FS:  00007f673d70d6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd248b5ef8 CR3: 0000000113c6f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_writepages+0x385/0x620 mm/page-writeback.c:2472
 filemap_fdatawrite_wbc+0x153/0x1b0 mm/filemap.c:402
 __filemap_fdatawrite_range mm/filemap.c:435 [inline]
 __filemap_fdatawrite mm/filemap.c:441 [inline]
 filemap_flush+0x11a/0x170 mm/filemap.c:468
 ext4_alloc_da_blocks+0x77/0x1a0 fs/ext4/inode.c:3153
 ext4_release_file+0x84/0x310 fs/ext4/file.c:158
 __fput+0x3ab/0x870 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x24d/0x2e0 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0x94/0xa0 kernel/entry/common.c:171
 exit_to_user_mode_prepare+0x5a/0xa0 kernel/entry/common.c:204
 __syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
 syscall_exit_to_user_mode+0x26/0x140 kernel/entry/common.c:297
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f673ca7dda9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f673d70d0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000021
RAX: 0000000000000004 RBX: 00007f673cbac050 RCX: 00007f673ca7dda9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000006
RBP: 00007f673caca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f673cbac050 R15: 00007ffd908edf48
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_writepages+0x3fab/0x3fd0 fs/ext4/inode.c:2748
Code: 88 81 ff 31 ff 89 de e8 b3 88 81 ff 45 84 f6 75 2a e8 19 86 81 ff 49 bc 00 00 00 00 00 fc ff df e9 6e f6 ff ff e8 05 86 81 ff <0f> 0b e8 fe 85 81 ff e8 e5 af 0c ff e9 46 c3 ff ff e8 ef 85 81 ff
RSP: 0018:ffffc90000de7580 EFLAGS: 00010293
RAX: ffffffff81f3cfeb RBX: 0000008000000000 RCX: ffff88811c1e8000
RDX: 0000000000000000 RSI: 0000008000000000 RDI: 0000000000000000
RBP: ffffc90000de7990 R08: ffffffff81f3974b R09: ffffed10240e550c
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88810f85e000
R13: ffff88812072a998 R14: 000000d410000000 R15: ffffc90000de7860
FS:  00007f673d70d6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6ed4cff000 CR3: 0000000113c6f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400