Oops: general protection fault, probably for non-canonical address 0xdffffc0000000003: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
CPU: 1 UID: 0 PID: 5944 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:i915_pci_probe+0x57/0x480 drivers/gpu/drm/i915/i915_pci.c:961
Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f6 03 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 6c 24 18 4c 8d 6d 1c 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 86 03 00 00
RSP: 0018:ffffc90006e9f988 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: ffff888021642000 RCX: ffffc9000c803000
RDX: 0000000000000003 RSI: ffffffff85d66fcd RDI: ffffffff8c438898
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c438880
R13: 000000000000001c R14: ffffffff85d66fb0 R15: ffff888021642130
FS:  0000000000000000(0000) GS:ffff888096cdf000(0063) knlGS:00000000f53ddb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f720e9ea CR3: 000000006e0e4000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 local_pci_probe+0xdd/0x1b0 drivers/pci/pci-driver.c:332
 pci_call_probe+0x176/0x800 drivers/pci/pci-driver.c:394
 __pci_device_probe drivers/pci/pci-driver.c:455 [inline]
 pci_device_probe+0x1cd/0x370 drivers/pci/pci-driver.c:489
 call_driver_probe drivers/base/dd.c:628 [inline]
 really_probe+0x241/0xa60 drivers/base/dd.c:706
 __driver_probe_device+0x20e/0x450 drivers/base/dd.c:868
 device_driver_attach+0xd1/0x220 drivers/base/dd.c:1203
 bind_store+0xf4/0x190 drivers/base/bus.c:267
 drv_attr_store+0x74/0xb0 drivers/base/bus.c:125
 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 __do_fast_syscall_32+0xe7/0x970 arch/x86/entry/syscall_32.c:307
 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:332
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf6feefec
Code: Unable to access opcode bytes at 0xf6feefc2.
RSP: 002b:00000000f53dd50c EFLAGS: 00000292 ORIG_RAX: 0000000000000004
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000080000180
RDX: 000000000000000d RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:i915_pci_probe+0x57/0x480 drivers/gpu/drm/i915/i915_pci.c:961
Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 f6 03 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 6c 24 18 4c 8d 6d 1c 4c 89 ea 48 c1 ea 03 <0f> b6 04 02 4c 89 ea 83 e2 07 38 d0 7f 08 84 c0 0f 85 86 03 00 00
RSP: 0018:ffffc90006e9f988 EFLAGS: 00010207
RAX: dffffc0000000000 RBX: ffff888021642000 RCX: ffffc9000c803000
RDX: 0000000000000003 RSI: ffffffff85d66fcd RDI: ffffffff8c438898
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8c438880
R13: 000000000000001c R14: ffffffff85d66fb0 R15: ffff888021642130
FS:  0000000000000000(0000) GS:ffff888096cdf000(0063) knlGS:00000000f53ddb40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f6fef000 CR3: 000000006e0e4000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	89 fa                	mov    %edi,%edx
   2:	48 c1 ea 03          	shr    $0x3,%rdx
   6:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   a:	0f 85 f6 03 00 00    	jne    0x406
  10:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  17:	fc ff df
  1a:	49 8b 6c 24 18       	mov    0x18(%r12),%rbp
  1f:	4c 8d 6d 1c          	lea    0x1c(%rbp),%r13
  23:	4c 89 ea             	mov    %r13,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2e:	4c 89 ea             	mov    %r13,%rdx
  31:	83 e2 07             	and    $0x7,%edx
  34:	38 d0                	cmp    %dl,%al
  36:	7f 08                	jg     0x40
  38:	84 c0                	test   %al,%al
  3a:	0f 85 86 03 00 00    	jne    0x3c6