BUG: kernel NULL pointer dereference, address: 0000000000000000 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0010) - not-present page PGD 48062067 P4D 48062067 PUD 50087067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 16130 Comm: syz-executor.5 Not tainted 6.2.0-rc4-syzkaller-00009-gd532dd102151 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90005207088 EFLAGS: 00010246 RAX: 1ffffffff165b2f8 RBX: ffffea00011b1140 RCX: 0000000000040000 RDX: ffffc9000bf11000 RSI: ffffc900052074e0 RDI: ffffea00011b1140 RBP: ffffffff8b2d97c0 R08: ffffffff81bc6826 R09: fffffbfff1d2d286 R10: fffffbfff1d2d286 R11: 1ffffffff1d2d285 R12: dffffc0000000000 R13: ffffea00011b1140 R14: ffff888044c18380 R15: ffffc900052074e0 FS: 00007f49e77a7700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000002a9ca000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __writepage+0x60/0x120 mm/page-writeback.c:2537 write_cache_pages+0x7cd/0x1340 mm/page-writeback.c:2472 generic_writepages mm/page-writeback.c:2563 [inline] do_writepages+0x424/0x680 mm/page-writeback.c:2583 filemap_fdatawrite_wbc+0x11e/0x170 mm/filemap.c:388 __filemap_fdatawrite_range mm/filemap.c:421 [inline] file_write_and_wait_range+0x219/0x320 mm/filemap.c:777 __generic_file_fsync+0x6e/0x190 fs/libfs.c:1132 generic_file_fsync+0x6f/0xe0 fs/libfs.c:1173 generic_write_sync include/linux/fs.h:2885 [inline] udf_file_write_iter+0x4d6/0x5f0 fs/udf/file.c:176 do_iter_write+0x6c2/0xc20 fs/read_write.c:861 iter_file_splice_write+0x7fc/0xfc0 fs/splice.c:686 do_splice_from fs/splice.c:764 [inline] direct_splice_actor+0xe6/0x1c0 fs/splice.c:931 splice_direct_to_actor+0x4e4/0xc00 fs/splice.c:886 do_splice_direct+0x279/0x3d0 fs/splice.c:974 do_sendfile+0x5fb/0xf80 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64+0x14f/0x1b0 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f49e6a8c0c9 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:00007f49e77a7168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f49e6babf80 RCX: 00007f49e6a8c0c9 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000006 RBP: 00007f49e6ae7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffa024458f R14: 00007f49e77a7300 R15: 0000000000022000 Modules linked in: CR2: 0000000000000000 ---[ end trace 0000000000000000 ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at 0xffffffffffffffd6. RSP: 0018:ffffc90005207088 EFLAGS: 00010246 RAX: 1ffffffff165b2f8 RBX: ffffea00011b1140 RCX: 0000000000040000 RDX: ffffc9000bf11000 RSI: ffffc900052074e0 RDI: ffffea00011b1140 RBP: ffffffff8b2d97c0 R08: ffffffff81bc6826 R09: fffffbfff1d2d286 R10: fffffbfff1d2d286 R11: 1ffffffff1d2d285 R12: dffffc0000000000 R13: ffffea00011b1140 R14: ffff888044c18380 R15: ffffc900052074e0 FS: 00007f49e77a7700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 000000002a9ca000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400