------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2624!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5366 Comm: syz.0.0 Not tainted 6.15.0-rc7-syzkaller-00014-gd608703fcdd9 #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+0x3e47/0x3e50 fs/ext4/inode.c:2623
Code: c1 0f 8c 23 fd ff ff 4c 89 e7 e8 a4 c7 b0 ff e9 16 fd ff ff e8 aa cc 4e ff 90 0f 0b e8 a2 cc 4e ff 90 0f 0b e8 9a cc 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:ffffc9000d5ff400 EFLAGS: 00010293
RAX: ffffffff82712536 RBX: 0000004a10000000 RCX: ffff88801f5e4880
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000d5ff7f0 R08: ffff888043d63bc7 R09: 1ffff110087ac778
R10: dffffc0000000000 R11: ffffed10087ac779 R12: ffffc9000d5ffb00
R13: ffffc9000d5ff840 R14: 0000004000000000 R15: 0000000000000001
FS:  00005555878fc500(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000070 CR3: 000000003ec07000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_writepages+0x203/0x350 fs/ext4/inode.c:2829
 do_writepages+0x3b1/0x7b0 mm/page-writeback.c:2656
 filemap_fdatawrite_wbc mm/filemap.c:386 [inline]
 __filemap_fdatawrite_range mm/filemap.c:419 [inline]
 __filemap_fdatawrite mm/filemap.c:425 [inline]
 filemap_flush+0x189/0x220 mm/filemap.c:470
 ext4_release_file+0x82/0x310 fs/ext4/file.c:169
 __fput+0x44c/0xa70 fs/file_table.c:465
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 resume_user_mode_work+0x5e/0x80 include/linux/resume_user_mode.h:50
 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+0x9a/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5afdf8e969
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:00007ffd96d37ea8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f5afe1b7ba0 RCX: 00007f5afdf8e969
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f5afe1b7ba0 R08: 0000000000000000 R09: 0000001a96d3819f
R10: 00007f5afe1b7ac0 R11: 0000000000000246 R12: 000000000004fda2
R13: 00007f5afe1b5fa0 R14: ffffffffffffffff R15: 00007ffd96d37fc0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x3e47/0x3e50 fs/ext4/inode.c:2623
Code: c1 0f 8c 23 fd ff ff 4c 89 e7 e8 a4 c7 b0 ff e9 16 fd ff ff e8 aa cc 4e ff 90 0f 0b e8 a2 cc 4e ff 90 0f 0b e8 9a cc 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:ffffc9000d5ff400 EFLAGS: 00010293
RAX: ffffffff82712536 RBX: 0000004a10000000 RCX: ffff88801f5e4880
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000d5ff7f0 R08: ffff888043d63bc7 R09: 1ffff110087ac778
R10: dffffc0000000000 R11: ffffed10087ac779 R12: ffffc9000d5ffb00
R13: ffffc9000d5ff840 R14: 0000004000000000 R15: 0000000000000001
FS:  00005555878fc500(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000070 CR3: 000000003ec07000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400