BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 7d836067 P4D 7d836067 PUD 27cf4067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5048 Comm: syz-executor.4 Not tainted 6.2.0-rc6-syzkaller-00163-g66a87fff1a87 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000392f0a8 EFLAGS: 00010246
RAX: 1ffffffff1641cb4 RBX: ffffea0000b4bfc0 RCX: 0000000000040000
RDX: ffffc9000cbb5000 RSI: ffffc9000392f500 RDI: ffffea0000b4bfc0
RBP: ffffffff8b20e5a0 R08: ffffffff81ba4b5e R09: fffffbfff1cadae6
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffea0000b4bfc0 R14: ffff88802c31bd28 R15: ffffc9000392f500
FS:  00007f333881b700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000021e88000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __writepage+0x64/0x130
 write_cache_pages+0x98e/0x16a0
 do_writepages+0x3ff/0x660
 filemap_fdatawrite_wbc+0x125/0x180
 file_write_and_wait_range+0x21f/0x320
 __generic_file_fsync+0x72/0x190
 generic_file_fsync+0x73/0xf0
 udf_file_write_iter+0x4b7/0x5e0
 do_iter_write+0x6bc/0xc20
 iter_file_splice_write+0x7d6/0xf80
 direct_splice_actor+0xe7/0x1c0
 splice_direct_to_actor+0x4c4/0xbd0
 do_splice_direct+0x282/0x3e0
 do_sendfile+0x5c9/0xf50
 __se_sys_sendfile64+0x153/0x1b0
 do_syscall_64+0x41/0xc0
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3337a8c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f333881b168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f3337babf80 RCX: 00007f3337a8c0c9
RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006
RBP: 00007f3337ae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd8a4cdabf R14: 00007f333881b300 R15: 0000000000022000
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc9000392f0a8 EFLAGS: 00010246
RAX: 1ffffffff1641cb4 RBX: ffffea0000b4bfc0 RCX: 0000000000040000
RDX: ffffc9000cbb5000 RSI: ffffc9000392f500 RDI: ffffea0000b4bfc0
RBP: ffffffff8b20e5a0 R08: ffffffff81ba4b5e R09: fffffbfff1cadae6
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffffea0000b4bfc0 R14: ffff88802c31bd28 R15: ffffc9000392f500
FS:  00007f333881b700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 0000000021e88000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400