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Npcap crash - BSOD - 0.9988 #1964

daulis opened this issue Mar 12, 2020 · 2 comments

Npcap crash - BSOD - 0.9988 #1964

daulis opened this issue Mar 12, 2020 · 2 comments


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@daulis daulis commented Mar 12, 2020

Here are the steps that I did. (I don't know if it's reproducible because I can't install/uninstall Npcap):

  1. Npcap 0.9987 (oem) was installed.
  2. Uninstalled Npcap 0.9987
  3. Installed WinPcap_4_1_3.exe (I was having performance issues during high-rate captures, and wanted to see if this was Npcap-specific)
  4. Did some capturing...
  5. Uninstalled WinPcap
  6. Installed Npcap 0.9988 (oem). I unchecked "WinPcap API-compatible mode" because that's the Wireshark default
  7. BSOD

There are 2 main issues:

  1. The BSOD/Crash
  2. My system is now stuck in a state that I can't capture, can't re-install Npcap, and can't uninstall Npcap.

OS: Windows 7 Enterprise

Information from the Windows dialogue box that popped up after I recovered:

Problem signature:
  Problem Event Name:	BlueScreen
  OS Version:	6.1.7601.
  Locale ID:	1033

Additional information about the problem:
  BCCode:	d1
  BCP1:	0000000000000008
  BCP2:	0000000000000002
  BCP3:	0000000000000000
  BCP4:	FFFFF880246EAB71
  OS Version:	6_1_7601
  Service Pack:	1_0
  Product:	256_1

Files that help describe the problem:

Read our privacy statement online:

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After the laptop rebooted:

  1. I tried capturing, but Npcap didn't complete installation, so there are no capture interfaces
  2. When trying to run the installer again, I get the following dialogue
  3. When I try uninstalling Npcap, I get the following dialogue:
  4. At this point, I can't capture, and I don't have a way to recover

I emailed the 2x references files above (031120-29811-01.dmp, WER-59389-0.sysdata.xml) to Dan and Npcap support.

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@dmiller-nmap dmiller-nmap commented Mar 12, 2020

I've received the files you sent, and I think I have a fix for the BSoD crash, which I will tag to this issue.

The other 2 errors preventing reinstall/uninstall are generated by NSIS when it can't write to the temporary files directory, usually %TEMP%. Verify that the temp directory exists and is writable, and delete any folders in that directory named like ns*.tmp.

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@daulis daulis commented Mar 22, 2020

@dmiller-nmap Thanks for the quick response on the crash!

Do you have any other suggestions for the NSIS issue?

  1. I've confirmed that the permissions for %TEMP% are fully writeable for my account. I can actually see a nsxxx.tmp file created when I launch the installer, but, I still get the "Can't initialize plug-ins..." error when launching.
  2. I've also confirmed that it's a generic problem for any NSIS installer, and just not npcap. The issue also affects Wireshark installers. It looks like the system is in a state where I can't uninstall/install anything that happens to use a NSIS installer.

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