------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:2827!
Oops: invalid opcode: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 8259 Comm: syz.6.343 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
RIP: 0010:ext4_do_writepages+0x479e/0x47a0 fs/ext4/inode.c:2826
Code: c6 60 16 84 8b e8 02 e5 a6 fe 90 0f 0b e8 4a 59 44 ff 4c 89 f7 48 c7 c6 40 1b 84 8b e8 eb e4 a6 fe 90 0f 0b e8 33 59 44 ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6
RSP: 0018:ffffc9000411f5e0 EFLAGS: 00010287
RAX: ffffffff8280e00d RBX: 0000004210000000 RCX: 0000000000080000
RDX: ffffc9000f8e9000 RSI: 000000000000002d RDI: 000000000000002e
RBP: ffffc9000411f9f0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10067ad186 R12: ffffc9000411fc60
R13: 1ffff92000823f8c R14: 0000004000000000 R15: 0000000000000001
FS:  00007ff40f7556c0(0000) GS:ffff888125d4c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff41156b540 CR3: 0000000062bf4000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 ext4_writepages+0x241/0x3b0 fs/ext4/inode.c:3043
 do_writepages+0x338/0x560 mm/page-writeback.c:2571
 filemap_writeback mm/filemap.c:387 [inline]
 filemap_flush_range+0x1ea/0x2f0 mm/filemap.c:436
 sync_file_range+0x214/0x2c0 fs/sync.c:286
 ksys_sync_file_range fs/sync.c:356 [inline]
 __do_sys_sync_file_range fs/sync.c:362 [inline]
 __se_sys_sync_file_range fs/sync.c:359 [inline]
 __x64_sys_sync_file_range+0xbe/0x110 fs/sync.c:359
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff41151de59
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:00007ff40f755028 EFLAGS: 00000246 ORIG_RAX: 0000000000000115
RAX: ffffffffffffffda RBX: 00007ff4117a6090 RCX: 00007ff41151de59
RDX: 000000000000bcb6 RSI: 0000000000000009 RDI: 0000000000000004
RBP: 00007ff4115b3e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff4117a6128 R14: 00007ff4117a6090 R15: 00007ffc4606ba48
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ext4_do_writepages+0x479e/0x47a0 fs/ext4/inode.c:2826
Code: c6 60 16 84 8b e8 02 e5 a6 fe 90 0f 0b e8 4a 59 44 ff 4c 89 f7 48 c7 c6 40 1b 84 8b e8 eb e4 a6 fe 90 0f 0b e8 33 59 44 ff 90 <0f> 0b 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6
RSP: 0018:ffffc9000411f5e0 EFLAGS: 00010287
RAX: ffffffff8280e00d RBX: 0000004210000000 RCX: 0000000000080000
RDX: ffffc9000f8e9000 RSI: 000000000000002d RDI: 000000000000002e
RBP: ffffc9000411f9f0 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffed10067ad186 R12: ffffc9000411fc60
R13: 1ffff92000823f8c R14: 0000004000000000 R15: 0000000000000001
FS:  00007ff40f7556c0(0000) GS:ffff888125d4c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff41156b540 CR3: 0000000062bf4000 CR4: 00000000003526f0