BUG: unable to handle page fault for address: fffffffffffffffc
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD eb3c067 P4D eb3c067 PUD eb3e067 PMD 0 
Oops: Oops: 0000 [#1] SMP KASAN PTI
CPU: 1 UID: 0 PID: 6746 Comm: syz.1.130 Not tainted 6.14.0-syzkaller-13389-ga52a3c18cdf3 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:const_folio_flags include/linux/page-flags.h:347 [inline]
RIP: 0010:folio_test_locked include/linux/page-flags.h:547 [inline]
RIP: 0010:folio_unlock+0x3b/0x170 mm/filemap.c:1498
Code: 49 bf 00 00 00 00 00 fc ff df e8 e0 ce c5 ff 4d 8d 66 08 4d 89 e5 49 c1 ed 03 43 80 7c 3d 00 00 74 08 4c 89 e7 e8 85 67 2d 00 <49> 8b 1c 24 48 89 de 48 83 e6 01 31 ff e8 93 d3 c5 ff 48 83 e3 01
RSP: 0018:ffffc9000aab70a8 EFLAGS: 00010246
RAX: ffffffff81fd77a0 RBX: 1ffff1100ff3b406 RCX: ffff88806186bc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: fffffffffffffff4
RBP: ffff88807f9da030 R08: ffffffff83bd65b2 R09: 1ffff11004f1838f
R10: dffffc0000000000 R11: ffffed1004f18390 R12: fffffffffffffffc
R13: 1fffffffffffffff R14: fffffffffffffff4 R15: dffffc0000000000
FS:  00007f84f3cc86c0(0000) GS:ffff8881250cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffffc CR3: 000000006189e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_unlock_and_free_folios+0x71/0x1a0 fs/ocfs2/aops.c:765
 ocfs2_free_write_ctxt fs/ocfs2/aops.c:813 [inline]
 ocfs2_write_begin_nolock+0x3942/0x4e80 fs/ocfs2/aops.c:1830
 ocfs2_write_begin+0x207/0x3a0 fs/ocfs2/aops.c:1882
 generic_perform_write+0x329/0xa10 mm/filemap.c:4102
 __generic_file_write_iter+0x1b5/0x230 mm/filemap.c:4216
 ocfs2_file_write_iter+0x190f/0x20d0 fs/ocfs2/file.c:2469
 new_sync_write fs/read_write.c:591 [inline]
 vfs_write+0x70f/0xd10 fs/read_write.c:684
 ksys_write+0x19d/0x2d0 fs/read_write.c:736
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f84f2d8d169
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f84f3cc8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f84f2fa5fa0 RCX: 00007f84f2d8d169
RDX: 00000000fffffd62 RSI: 0000000000000000 RDI: 0000000000000005
RBP: 00007f84f3cc8090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 00007f84f2fa5fa0 R15: 00007fff506732e8
 </TASK>
Modules linked in:
CR2: fffffffffffffffc
---[ end trace 0000000000000000 ]---
RIP: 0010:const_folio_flags include/linux/page-flags.h:347 [inline]
RIP: 0010:folio_test_locked include/linux/page-flags.h:547 [inline]
RIP: 0010:folio_unlock+0x3b/0x170 mm/filemap.c:1498
Code: 49 bf 00 00 00 00 00 fc ff df e8 e0 ce c5 ff 4d 8d 66 08 4d 89 e5 49 c1 ed 03 43 80 7c 3d 00 00 74 08 4c 89 e7 e8 85 67 2d 00 <49> 8b 1c 24 48 89 de 48 83 e6 01 31 ff e8 93 d3 c5 ff 48 83 e3 01
RSP: 0018:ffffc9000aab70a8 EFLAGS: 00010246
RAX: ffffffff81fd77a0 RBX: 1ffff1100ff3b406 RCX: ffff88806186bc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: fffffffffffffff4
RBP: ffff88807f9da030 R08: ffffffff83bd65b2 R09: 1ffff11004f1838f
R10: dffffc0000000000 R11: ffffed1004f18390 R12: fffffffffffffffc
R13: 1fffffffffffffff R14: fffffffffffffff4 R15: dffffc0000000000
FS:  00007f84f3cc86c0(0000) GS:ffff8881250cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffffc CR3: 000000006189e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
   7:	fc ff df
   a:	e8 e0 ce c5 ff       	call   0xffc5ceef
   f:	4d 8d 66 08          	lea    0x8(%r14),%r12
  13:	4d 89 e5             	mov    %r12,%r13
  16:	49 c1 ed 03          	shr    $0x3,%r13
  1a:	43 80 7c 3d 00 00    	cmpb   $0x0,0x0(%r13,%r15,1)
  20:	74 08                	je     0x2a
  22:	4c 89 e7             	mov    %r12,%rdi
  25:	e8 85 67 2d 00       	call   0x2d67af
* 2a:	49 8b 1c 24          	mov    (%r12),%rbx <-- trapping instruction
  2e:	48 89 de             	mov    %rbx,%rsi
  31:	48 83 e6 01          	and    $0x1,%rsi
  35:	31 ff                	xor    %edi,%edi
  37:	e8 93 d3 c5 ff       	call   0xffc5d3cf
  3c:	48 83 e3 01          	and    $0x1,%rbx