------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2621!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5319 Comm: syz.0.0 Not tainted 6.14.0-syzkaller-10167-g93d52288679e #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ext4_do_writepages+0x3e44/0x3e50 fs/ext4/inode.c:2620
Code: ef 8e 4c 89 f2 e8 2c fb bb 02 e9 83 fb ff ff e8 32 e5 41 ff 90 0f 0b e8 2a e5 41 ff 90 0f 0b e8 12 49 ab 09 e8 1d e5 41 ff 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000d4b7380 EFLAGS: 00010293
RAX: ffffffff828185d3 RBX: 0000004000000000 RCX: ffff88801f4f4880
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000d4b7790 R08: ffffffff82814d03 R09: 1ffff1100867fb2f
R10: dffffc0000000000 R11: ffffed100867fb30 R12: 0000000000000001
R13: ffffc9000d4b7b20 R14: 0000004a10000000 R15: ffffc9000d4b7800
FS:  0000555571260500(0000) GS:ffff88808c5b7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000003c1000 CR3: 0000000040dce000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_writepages+0x26f/0x450 fs/ext4/inode.c:2826
 do_writepages+0x36a/0x890 mm/page-writeback.c:2687
 filemap_fdatawrite_wbc mm/filemap.c:389 [inline]
 __filemap_fdatawrite_range mm/filemap.c:422 [inline]
 __filemap_fdatawrite mm/filemap.c:428 [inline]
 filemap_flush+0x1d2/0x270 mm/filemap.c:473
 ext4_release_file+0x81/0x300 fs/ext4/file.c:169
 __fput+0x3e9/0x9f0 fs/file_table.c:465
 task_work_run+0x251/0x310 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x13f/0x340 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc569f8d169
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:00007ffec39e7818 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fc56a1a7ba0 RCX: 00007fc569f8d169
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fc56a1a7ba0 R08: 0000000000035e8c R09: 0000001ec39e7b0f
R10: 00007fc56a1a7ac0 R11: 0000000000000246 R12: 000000000000e979
R13: 00007fc56a1a5fa0 R14: ffffffffffffffff R15: 00007ffec39e7930
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x3e44/0x3e50 fs/ext4/inode.c:2620
Code: ef 8e 4c 89 f2 e8 2c fb bb 02 e9 83 fb ff ff e8 32 e5 41 ff 90 0f 0b e8 2a e5 41 ff 90 0f 0b e8 12 49 ab 09 e8 1d e5 41 ff 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000d4b7380 EFLAGS: 00010293
RAX: ffffffff828185d3 RBX: 0000004000000000 RCX: ffff88801f4f4880
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000d4b7790 R08: ffffffff82814d03 R09: 1ffff1100867fb2f
R10: dffffc0000000000 R11: ffffed100867fb30 R12: 0000000000000001
R13: ffffc9000d4b7b20 R14: 0000004a10000000 R15: ffffc9000d4b7800
FS:  0000555571260500(0000) GS:ffff88808c5b7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000679000 CR3: 0000000040dce000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400