------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2803!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 7346 Comm: syz.7.208 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/27/2026
RIP: 0010:ext4_do_writepages+0x46d9/0x46e0 fs/ext4/inode.c:2802
Code: c6 a0 6d 63 8b e8 07 fd ab fe 90 0f 0b e8 2f a1 48 ff 4c 89 f7 48 c7 c6 80 72 63 8b e8 f0 fc ab fe 90 0f 0b e8 18 a1 48 ff 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900015df540 EFLAGS: 00010293
RAX: ffffffff827bc4f8 RBX: 0000004210000000 RCX: ffff8880324d5b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900015df950 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100813f777 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff110049fa4f3
FS:  00007f78b10a56c0(0000) GS:ffff88812643c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f78b1083ff8 CR3: 000000002501a000 CR4: 00000000003526f0
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_fdatawrite_range mm/filemap.c:412 [inline]
 file_write_and_wait_range+0x374/0x440 mm/filemap.c:786
 generic_buffers_fsync_noflush+0x73/0x1d0 fs/buffer.c:606
 ext4_fsync_nojournal fs/ext4/fsync.c:88 [inline]
 ext4_sync_file+0x32a/0xb70 fs/ext4/fsync.c:147
 vfs_fsync_range fs/sync.c:186 [inline]
 vfs_fsync fs/sync.c:200 [inline]
 do_fsync fs/sync.c:211 [inline]
 __do_sys_fsync fs/sync.c:216 [inline]
 __se_sys_fsync fs/sync.c:214 [inline]
 __x64_sys_fsync+0x130/0x190 fs/sync.c:214
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f78b2e6c799
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:00007f78b10a5028 EFLAGS: 00000246 ORIG_RAX: 000000000000004a
RAX: ffffffffffffffda RBX: 00007f78b30e6090 RCX: 00007f78b2e6c799
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f78b2f02c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f78b30e6128 R14: 00007f78b30e6090 R15: 00007ffdce3d6658
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x46d9/0x46e0 fs/ext4/inode.c:2802
Code: c6 a0 6d 63 8b e8 07 fd ab fe 90 0f 0b e8 2f a1 48 ff 4c 89 f7 48 c7 c6 80 72 63 8b e8 f0 fc ab fe 90 0f 0b e8 18 a1 48 ff 90 <0f> 0b 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900015df540 EFLAGS: 00010293
RAX: ffffffff827bc4f8 RBX: 0000004210000000 RCX: ffff8880324d5b80
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900015df950 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed100813f777 R12: dffffc0000000000
R13: 0000000000000001 R14: 0000004000000000 R15: 1ffff110049fa4f3
FS:  00007f78b10a56c0(0000) GS:ffff88812643c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000002501a000 CR4: 00000000003526f0