------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2803!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 31573 Comm: syz.1.5118 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:ext4_do_writepages+0x46d6/0x46e0 fs/ext4/inode.c:2802
Code: c6 a0 f7 e3 8b e8 ca 98 a2 fe 90 0f 0b e8 52 1e 40 ff 4c 89 f7 48 c7 c6 80 fc e3 8b e8 b3 98 a2 fe 90 0f 0b e8 3b 1e 40 ff 90 <0f> 0b 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000ad17460 EFLAGS: 00010293
RAX: ffffffff82857f95 RBX: 0000004a10000000 RCX: ffff8880337c9e40
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000ad17870 R08: ffff8880537ef377 R09: 1ffff1100a6fde6e
R10: dffffc0000000000 R11: ffffed100a6fde6f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100c57e4c7
FS:  000055555d376500(0000) GS:ffff88812556a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16a1afeff8 CR3: 0000000089b74000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3019
 do_writepages+0x32e/0x550 mm/page-writeback.c:2554
 filemap_writeback mm/filemap.c:387 [inline]
 filemap_flush_range mm/filemap.c:436 [inline]
 filemap_flush+0x1e1/0x2e0 mm/filemap.c:451
 ext4_release_file+0x82/0x310 fs/ext4/file.c:170
 __fput+0x44f/0xa70 fs/file_table.c:469
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa8a5d9aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fffc7aa7c58 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fa8a6017da0 RCX: 00007fa8a5d9aeb9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fa8a6017da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007fa8a6017cb0 R11: 0000000000000246 R12: 0000000000194658
R13: 00007fa8a601618c R14: 000000000019456b R15: 00007fa8a6016180
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x46d6/0x46e0 fs/ext4/inode.c:2802
Code: c6 a0 f7 e3 8b e8 ca 98 a2 fe 90 0f 0b e8 52 1e 40 ff 4c 89 f7 48 c7 c6 80 fc e3 8b e8 b3 98 a2 fe 90 0f 0b e8 3b 1e 40 ff 90 <0f> 0b 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000ad17460 EFLAGS: 00010293
RAX: ffffffff82857f95 RBX: 0000004a10000000 RCX: ffff8880337c9e40
RDX: 0000000000000000 RSI: 0000004000000000 RDI: 0000000000000000
RBP: ffffc9000ad17870 R08: ffff8880537ef377 R09: 1ffff1100a6fde6e
R10: dffffc0000000000 R11: ffffed100a6fde6f R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff1100c57e4c7
FS:  000055555d376500(0000) GS:ffff88812546a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc6bbc91c8 CR3: 0000000089b74000 CR4: 00000000003526f0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400