BUG: unable to handle page fault for address: fffffffffffffffc
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 6e12067 P4D 6e12067 PUD 6e14067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 3831 Comm: syz.7.8280 Not tainted 6.1.134-syzkaller-00039-g3c6d0251e1fb #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:read_pages+0x8d8/0xdd0 mm/readahead.c:192
Code: 00 00 00 fc ff df 48 8b 4c 24 48 80 3c 01 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 f4 fe 16 00 49 8b 3e 48 89 de 41 ba 66 11 67 e4 <45> 03 54 24 fc 74 02 0f 0b 41 ff d4 49 bc 00 00 00 00 00 fc ff df
RSP: 0018:ffffc9000166f1c0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffea0004d09a00 RCX: 1ffff920002cdee0
RDX: ffffc9000eb39000 RSI: ffffea0004d09a00 RDI: ffff888123807200
RBP: ffffc9000166f310 R08: dffffc0000000000 R09: fffff940009a1347
R10: 00000000e4671166 R11: 1ffffd40009a1346 R12: 0000000000000000
R13: ffffc9000166f720 R14: ffffc9000166f700 R15: ffffc9000166f718
FS:  00007feb018746c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffffc CR3: 000000012dadf000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 page_cache_ra_order+0x940/0xb70 mm/readahead.c:564
 ondemand_readahead+0x817/0xdb0 mm/readahead.c:704
 page_cache_sync_ra+0x41b/0x490 mm/readahead.c:731
 page_cache_sync_readahead include/linux/pagemap.h:1257 [inline]
 collapse_file mm/khugepaged.c:1887 [inline]
 hpage_collapse_scan_file+0x1022/0x38f0 mm/khugepaged.c:2259
 madvise_collapse+0x5bb/0xa60 mm/khugepaged.c:2714
 madvise_vma_behavior mm/madvise.c:1134 [inline]
 madvise_walk_vmas mm/madvise.c:1308 [inline]
 do_madvise+0x10ae/0x2f50 mm/madvise.c:1487
 __do_sys_madvise mm/madvise.c:1500 [inline]
 __se_sys_madvise mm/madvise.c:1498 [inline]
 __x64_sys_madvise+0xa9/0xc0 mm/madvise.c:1498
 x64_sys_call+0x99e/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:29
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7feb0098e969
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:00007feb01874038 EFLAGS: 00000246 ORIG_RAX: 000000000000001c
RAX: ffffffffffffffda RBX: 00007feb00bb5fa0 RCX: 00007feb0098e969
RDX: 0000000000000019 RSI: 0000000000600000 RDI: 0000200000000000
RBP: 00007feb00a10ab1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007feb00bb5fa0 R15: 00007ffe0aedd0b8
 </TASK>
Modules linked in:
CR2: fffffffffffffffc
---[ end trace 0000000000000000 ]---
RIP: 0010:read_pages+0x8d8/0xdd0 mm/readahead.c:192
Code: 00 00 00 fc ff df 48 8b 4c 24 48 80 3c 01 00 4c 8b 74 24 18 74 08 4c 89 f7 e8 f4 fe 16 00 49 8b 3e 48 89 de 41 ba 66 11 67 e4 <45> 03 54 24 fc 74 02 0f 0b 41 ff d4 49 bc 00 00 00 00 00 fc ff df
RSP: 0018:ffffc9000166f1c0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffea0004d09a00 RCX: 1ffff920002cdee0
RDX: ffffc9000eb39000 RSI: ffffea0004d09a00 RDI: ffff888123807200
RBP: ffffc9000166f310 R08: dffffc0000000000 R09: fffff940009a1347
R10: 00000000e4671166 R11: 1ffffd40009a1346 R12: 0000000000000000
R13: ffffc9000166f720 R14: ffffc9000166f700 R15: ffffc9000166f718
FS:  00007feb018746c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffffc CR3: 000000012dadf000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 5 bytes skipped:
   0:	df 48 8b             	fisttps -0x75(%rax)
   3:	4c 24 48             	rex.WR and $0x48,%al
   6:	80 3c 01 00          	cmpb   $0x0,(%rcx,%rax,1)
   a:	4c 8b 74 24 18       	mov    0x18(%rsp),%r14
   f:	74 08                	je     0x19
  11:	4c 89 f7             	mov    %r14,%rdi
  14:	e8 f4 fe 16 00       	call   0x16ff0d
  19:	49 8b 3e             	mov    (%r14),%rdi
  1c:	48 89 de             	mov    %rbx,%rsi
  1f:	41 ba 66 11 67 e4    	mov    $0xe4671166,%r10d
* 25:	45 03 54 24 fc       	add    -0x4(%r12),%r10d <-- trapping instruction
  2a:	74 02                	je     0x2e
  2c:	0f 0b                	ud2
  2e:	41 ff d4             	call   *%r12
  31:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  38:	fc ff df