------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2746!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5326 Comm: syz.0.0 Not tainted 6.16.0-syzkaller-04405-g4b290aae788e #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+0x3f2b/0x3f30 fs/ext4/inode.c:2745
Code: c1 0f 8c 2a fd ff ff 4c 89 e7 e8 90 31 b0 ff e9 1d fd ff ff e8 26 b0 4c ff 90 0f 0b e8 1e b0 4c ff 90 0f 0b e8 16 b0 4c ff 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66
RSP: 0018:ffffc9000ece74a0 EFLAGS: 00010293
RAX: ffffffff827315fa RBX: 0000004a10000000 RCX: ffff88801c640000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000ece78b0 R08: ffff888043e99377 R09: 1ffff110087d326e
R10: dffffc0000000000 R11: ffffed10087d326f R12: 0000000000000001
R13: 0000000000400040 R14: 0000004000000000 R15: ffffc9000ece7900
FS:  0000555576a0e500(0000) GS:ffff88808d27b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005621bbe85168 CR3: 00000000426ca000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 ext4_writepages+0x205/0x350 fs/ext4/inode.c:2951
 do_writepages+0x32e/0x550 mm/page-writeback.c:2636
 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+0x449/0xa70 fs/file_table.c:468
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xec/0x110 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:208 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd104d8e9a9
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:00007ffdfc0d6548 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fd104fb7ba0 RCX: 00007fd104d8e9a9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fd104fb7ba0 R08: 0000000000000000 R09: 00000020fc0d683f
R10: 00007fd104fb7ac0 R11: 0000000000000246 R12: 0000000000012a1a
R13: 00007fd104fb5fa0 R14: ffffffffffffffff R15: 00007ffdfc0d6660
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x3f2b/0x3f30 fs/ext4/inode.c:2745
Code: c1 0f 8c 2a fd ff ff 4c 89 e7 e8 90 31 b0 ff e9 1d fd ff ff e8 26 b0 4c ff 90 0f 0b e8 1e b0 4c ff 90 0f 0b e8 16 b0 4c ff 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66
RSP: 0018:ffffc9000ece74a0 EFLAGS: 00010293
RAX: ffffffff827315fa RBX: 0000004a10000000 RCX: ffff88801c640000
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000ece78b0 R08: ffff888043e99377 R09: 1ffff110087d326e
R10: dffffc0000000000 R11: ffffed10087d326f R12: 0000000000000001
R13: 0000000000400040 R14: 0000004000000000 R15: ffffc9000ece7900
FS:  0000555576a0e500(0000) GS:ffff88808d27b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005621bbe85168 CR3: 00000000426ca000 CR4: 0000000000352ef0