RIP points to one byte post the beginning of instruction

[windows_dev_st]

Hello!

I have an interesting recurring crash which happens only on a couple of computers in the organization.
When I am looking at the call stack, I see that the instruction that causes the crash is at
address fffff803`268c1d15:

#   Child-SP                    RetAddr Call Site
...
04 ffffef8f`b4c3f7b0   fffff803`2642eac3 nt!RtlpExecuteHandlerForException+0xf
05 ffffef8f`b4c3f7e0   fffff803`2651813e nt!RtlDispatchException+0x2f3
06 ffffef8f`b4c3ff50    fffff803`2662ae7c nt!KiDispatchException+0x1ae
07 ffffef8f`b4c40630  fffff803`26626163 nt!KiExceptionDispatch+0x13c
08 ffffef8f`b4c40810  fffff803`268c1d15 nt!KiPageFault+0x463
09 ffffef8f`b4c409a0  fffff803`21331ff1  nt!RtlCompareUnicodeString+0x75

However, when examining the function machine code, it shows that the closest instruction is actually at  fffff803`268c1d14:

nt!RtlCompareUnicodeString+0x57:
fffff803`268c1cf7    41bee0ff0000 mov r14d,0FFE0h
fffff803`268c1cfd    41bfc0000000 mov r15d,0C0h
fffff803`268c1d03   0f1f4000 nop dword ptr [rax]
fffff803`268c1d07   660f1f840000000000 nop word ptr [rax+rax]
fffff803`268c1d10   410fb711 movzx edx,word ptr [r9]

fffff803`268c1d14   470fb7140b movzx r10d,word ptr [r11+r9]
fffff803`268c1d19   66413bd2 cmp dx,r10w
fffff803`268c1d1d   7527 jne nt!RtlCompareUnicodeString+0xa6 (fffff803`268c1d46)

At other times the crash happens at different code locations, but the pattern is the same, RIP points to one byte post the beginning of the instruction.

These crashes seem to happen on one particular model of laptops.
Does anyone have any clue to what it could be?

Thanks in advance!

[DeancR_Intel]

Hi windows_dev_st,

Thank you for posting in the Community!

I understand that you have a laptop. Since this is an OEM (Brand) original equipment manufacturer device, please take into consideration that our support may be limited since we are not familiar with the technology, settings, customizations, custom drivers, and features that the OEM has designed and installed your system, nevertheless, I will do my best to assist you with your concern. I hope it's okay.

Please share more details about the issue so I can assist you effectively.

Was this working before or a newly integrated system?

Did you do recent changes with the system?

Have you performed other troubleshooting steps?

What is the model and specifications of the laptop that encountered the issue?

Best regards,

Dean R.

Intel Customer Support Technician

[DeancR_Intel]

Hi windows_dev_st,

I wanted to follow up on the previous message regarding your inquiry. Have you had a chance to review it? If you have any questions or need further information, please let me know.

Best regards,

Dean R.

Intel Customer Support Technician

[DeancR_Intel]

Hi windows_dev_st,

Since I haven't received a response from you, I will be closing this inquiry. If you need further assistance, please submit a new question, as this thread will no longer be monitored.

Best regards,

Dean R.

Intel Customer Support Technician