BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 75f61067 P4D 75f61067 PUD 228d2067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 16116 Comm: syz-executor.2 Not tainted 6.2.0-rc5-syzkaller-00047-g7c46948a6e9c #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:ffffc90006a17780 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffffff8a8814c0 RCX: 0000000000000000
RDX: 1ffffffff1510298 RSI: ffffc90006a17b50 RDI: ffffea00021f2a80
RBP: ffff888081670440 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90006a17b50
R13: ffffea00021f2a80 R14: ffffea00021f2a80 R15: ffff88801e986000
FS:  00007f749b877700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000002bf71000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __writepage+0x64/0x180 mm/page-writeback.c:2537
 write_cache_pages+0x785/0x19c0 mm/page-writeback.c:2472
 generic_writepages mm/page-writeback.c:2563 [inline]
 generic_writepages mm/page-writeback.c:2552 [inline]
 do_writepages+0x2b8/0x690 mm/page-writeback.c:2583
 filemap_fdatawrite_wbc mm/filemap.c:388 [inline]
 filemap_fdatawrite_wbc+0x147/0x1b0 mm/filemap.c:378
 __filemap_fdatawrite_range+0xb8/0xf0 mm/filemap.c:421
 file_write_and_wait_range+0xce/0x140 mm/filemap.c:777
 __generic_file_fsync+0x78/0x1f0 fs/libfs.c:1132
 generic_file_fsync+0x77/0x120 fs/libfs.c:1173
 vfs_fsync_range+0x13e/0x230 fs/sync.c:188
 generic_write_sync include/linux/fs.h:2885 [inline]
 udf_file_write_iter+0x3b4/0x650 fs/udf/file.c:176
 call_write_iter include/linux/fs.h:2189 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x9ed/0xdd0 fs/read_write.c:584
 ksys_write+0x12b/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f749aa8c0c9
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:00007f749b877168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f749abac050 RCX: 00007f749aa8c0c9
RDX: 00000000000000b6 RSI: 0000000020000000 RDI: 0000000000000004
RBP: 00007f749aae7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdcf75904f R14: 00007f749b877300 R15: 0000000000022000
 </TASK>
Modules linked in:
CR2: 0000000000000000
---[ end trace 0000000000000000 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at 0xffffffffffffffd6.
RSP: 0018:ffffc90006a17780 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffffff8a8814c0 RCX: 0000000000000000
RDX: 1ffffffff1510298 RSI: ffffc90006a17b50 RDI: ffffea00021f2a80
RBP: ffff888081670440 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90006a17b50
R13: ffffea00021f2a80 R14: ffffea00021f2a80 R15: ffff88801e986000
FS:  00007f749b877700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000002bf71000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400