Oops: general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f]
CPU: 2 UID: 0 PID: 6958 Comm: syz.0.438 Not tainted 6.12.0-rc2-syzkaller-00074-gd3d1556696c1 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:pfnmap_lockdep_assert mm/memory.c:6349 [inline]
RIP: 0010:follow_pfnmap_start+0x115/0xdc0 mm/memory.c:6402
Code: 48 c1 ea 03 80 3c 02 00 0f 85 10 0b 00 00 4c 8b bd 80 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d3 0a 00 00 48 c7 c0 38 05 1d 90 49 8b 57 58 48
RSP: 0018:ffffc9002b067498 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffffc9002b067578 RCX: ffffc90007499000
RDX: 000000000000000b RSI: ffffffff81d431aa RDI: 0000000000000058
RBP: ffff88805e198c98 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000001000000 R11: 0000000000000000 R12: 0000000020000000
R13: 1ffff9200560ce97 R14: ffff88802b3bdf00 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802b600000(0063) knlGS:00000000f563cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000000c37666f CR3: 0000000022db8000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 follow_phys arch/x86/mm/pat/memtype.c:940 [inline]
 get_pat_info+0x118/0x320 arch/x86/mm/pat/memtype.c:972
 untrack_pfn+0xf7/0x4d0 arch/x86/mm/pat/memtype.c:1085
 unmap_single_vma+0x1bd/0x2b0 mm/memory.c:1834
 unmap_vmas+0x22f/0x490 mm/memory.c:1900
 unmap_region+0x201/0x480 mm/vma.c:354
 mmap_region+0x1c00/0x2a50 mm/mmap.c:1573
 do_mmap+0xc00/0xfc0 mm/mmap.c:496
 vm_mmap_pgoff+0x1ba/0x360 mm/util.c:588
 ksys_mmap_pgoff+0x32c/0x5c0 mm/mmap.c:542
 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline]
 __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:386
 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:411
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf743e579
Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00
RSP: 002b:00000000f563c56c EFLAGS: 00000296 ORIG_RAX: 00000000000000c0
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 0000000000400000
RDX: 000000000000000f RSI: 0000000000011012 RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:pfnmap_lockdep_assert mm/memory.c:6349 [inline]
RIP: 0010:follow_pfnmap_start+0x115/0xdc0 mm/memory.c:6402
Code: 48 c1 ea 03 80 3c 02 00 0f 85 10 0b 00 00 4c 8b bd 80 00 00 00 48 b8 00 00 00 00 00 fc ff df 49 8d 7f 58 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 d3 0a 00 00 48 c7 c0 38 05 1d 90 49 8b 57 58 48
RSP: 0018:ffffc9002b067498 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffffc9002b067578 RCX: ffffc90007499000
RDX: 000000000000000b RSI: ffffffff81d431aa RDI: 0000000000000058
RBP: ffff88805e198c98 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000001000000 R11: 0000000000000000 R12: 0000000020000000
R13: 1ffff9200560ce97 R14: ffff88802b3bdf00 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88802b500000(0063) knlGS:00000000f563cb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 000000003221bff8 CR3: 0000000022db8000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 10 0b 00 00    	jne    0xb1e
   e:	4c 8b bd 80 00 00 00 	mov    0x80(%rbp),%r15
  15:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1c:	fc ff df
  1f:	49 8d 7f 58          	lea    0x58(%r15),%rdi
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 d3 0a 00 00    	jne    0xb07
  34:	48 c7 c0 38 05 1d 90 	mov    $0xffffffff901d0538,%rax
  3b:	49 8b 57 58          	mov    0x58(%r15),%rdx
  3f:	48                   	rex.W