syzbot

BUG: unable to handle page fault for address: fffffffffffffff1
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 74ac067 P4D 74ac067 PUD 74ae067 PMD 0 
Oops: Oops: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 382 Comm: syz.2.17 Not tainted syzkaller #0 fe4377b9fb1dd84776adf13d0641004acb4d0da4
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
RIP: 0010:filemap_read_folio+0xec/0x2e0 mm/filemap.c:2475
Code: 00 00 00 00 49 81 e5 00 02 00 00 0f 85 8a 01 00 00 e8 58 2b c8 ff 4d 89 fd 4c 89 ff 4c 89 f6 4c 8b 5c 24 18 41 ba df d9 92 ab <45> 03 53 f1 74 02 0f 0b 2e e8 1e d6 40 1e 41 89 c7 31 ff 44 89 fe
RSP: 0018:ffffc9000100f920 EFLAGS: 00010293
RAX: ffffffff81bf71b8 RBX: 1ffffd4000955a38 RCX: ffff888116562600
RDX: 0000000000000000 RSI: ffffea0004aad1c0 RDI: ffff8881136feb40
RBP: ffffc9000100f9e0 R08: ffffea0004aad1c7 R09: 1ffffd4000955a38
R10: 00000000ab92d9df R11: 0000000000000000 R12: 1ffff92000201f28
R13: ffff8881136feb40 R14: ffffea0004aad1c0 R15: ffff8881136feb40
FS:  00005555597ed500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff1 CR3: 00000001087b2000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 do_read_cache_folio+0x2b4/0x4c0 mm/filemap.c:4054
 read_cache_folio+0x54/0x90 mm/filemap.c:4086
 freader_get_folio+0x471/0x700 lib/buildid.c:77
 freader_fetch+0xa4/0x590 lib/buildid.c:120
 __build_id_parse+0x167/0x7f0 lib/buildid.c:305
 build_id_parse+0x2e/0x40 lib/buildid.c:359
 do_procmap_query fs/proc/task_mmu.c:695 [inline]
 procfs_procmap_ioctl+0x872/0xdc0 fs/proc/task_mmu.c:774
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x132/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f74bdd9aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffefd6eecc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f74be015fa0 RCX: 00007f74bdd9aeb9
RDX: 0000200000000180 RSI: 00000000c0686611 RDI: 0000000000000004
RBP: 00007f74bde08c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f74be015fac R14: 00007f74be015fa0 R15: 00007f74be015fa0
 </TASK>
Modules linked in:
CR2: fffffffffffffff1
---[ end trace 0000000000000000 ]---
RIP: 0010:filemap_read_folio+0xec/0x2e0 mm/filemap.c:2475
Code: 00 00 00 00 49 81 e5 00 02 00 00 0f 85 8a 01 00 00 e8 58 2b c8 ff 4d 89 fd 4c 89 ff 4c 89 f6 4c 8b 5c 24 18 41 ba df d9 92 ab <45> 03 53 f1 74 02 0f 0b 2e e8 1e d6 40 1e 41 89 c7 31 ff 44 89 fe
RSP: 0018:ffffc9000100f920 EFLAGS: 00010293
RAX: ffffffff81bf71b8 RBX: 1ffffd4000955a38 RCX: ffff888116562600
RDX: 0000000000000000 RSI: ffffea0004aad1c0 RDI: ffff8881136feb40
RBP: ffffc9000100f9e0 R08: ffffea0004aad1c7 R09: 1ffffd4000955a38
R10: 00000000ab92d9df R11: 0000000000000000 R12: 1ffff92000201f28
R13: ffff8881136feb40 R14: ffffea0004aad1c0 R15: ffff8881136feb40
FS:  00005555597ed500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffffffffff1 CR3: 00000001087b2000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	49 81 e5 00 02 00 00 	and    $0x200,%r13
   b:	0f 85 8a 01 00 00    	jne    0x19b
  11:	e8 58 2b c8 ff       	call   0xffc82b6e
  16:	4d 89 fd             	mov    %r15,%r13
  19:	4c 89 ff             	mov    %r15,%rdi
  1c:	4c 89 f6             	mov    %r14,%rsi
  1f:	4c 8b 5c 24 18       	mov    0x18(%rsp),%r11
  24:	41 ba df d9 92 ab    	mov    $0xab92d9df,%r10d
* 2a:	45 03 53 f1          	add    -0xf(%r11),%r10d <-- trapping instruction
  2e:	74 02                	je     0x32
  30:	0f 0b                	ud2
  32:	2e e8 1e d6 40 1e    	cs call 0x1e40d656
  38:	41 89 c7             	mov    %eax,%r15d
  3b:	31 ff                	xor    %edi,%edi
  3d:	44 89 fe             	mov    %r15d,%esi