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Windows 7: MUP.SYS cause a BSOD on my PC

10 Jun 2015   #1

Windows 7 enterprise 32 bit
MUP.SYS cause a BSOD on my PC

The attached file contain the output of the "dm log collector".
It seems that the BSOD is caused by the mup.sys driver.
Thanks for your help.

My System SpecsSystem Spec
10 Jun 2015   #2

Windows 10 Pro x64

MUP.sys == Multiple UNC Provider. It actually just provides an interface into the myriad of ways a system can access remote systems via UNC through the redirector (rdbss.sys). Whilst MUP can be the culprit, it is rarely the case. The dumps you've provided indicates that some driver is calling to another system via the redirector, which is going into MUP.sys with invalid data and crashing the box (I have seen this exact stack before in Windows 7):
1: kd> kn
  *** Stack trace for last set context - .thread/.cxr resets it
 # ChildEBP RetAddr  
00 8dfaeab0 8c20db8f mup!MupCallSurrogatePrePost+0xca
01 8dfaeac8 8c20942b mup!MupStateMachine+0x65
02 8dfaeadc 82e92ef3 mup!MupiUncProviderCompletion+0x71
03 8dfaeb24 9c356f30 nt!IopfCompleteRequest+0x128
04 8dfaeb5c 9c382c2f rdbss!RxCompleteRequestEx+0x291
05 8dfaeb7c 9c37ebb7 rdbss!RxProcessException+0x11c
06 8dfaebe8 83030747 rdbss!RxFspDispatch+0x104
07 8dfaec00 82e9823b nt!IopProcessWorkItem+0x2d
08 8dfaec50 8302500f nt!ExpWorkerThread+0x10d
09 8dfaec90 82ecb699 nt!PspSystemThreadStartup+0x9e
0a 00000000 00000000 nt!KiThreadStartup+0x19
You will need to enable special pool and capture another dump to figure out what's causing this.

As always, before doing anything to your system, it would be recommended to create a restore point, just in case...

From the start screen, type 'verifier' to open verifier.exe, which should open 'Driver Verifier Manager'.

1. Select the option "Create custom settings (for code developers)" and click Next:

2. Select all checkboxes except for options "Randomized low resources simulation", "Power framework delay fuzzing", and "Systematic low resource simulation" and click Next:

3. Select the option "Select driver names from a list" and click Next:

4. Sort the list by provider, and select all items that are NOT from the "Microsoft Corporation" provider (you may have to select items both before *and* after the "Microsoft Corporation" items to get all non-OS drivers) - with one exception, mup.sys - and then click Finish:

5. Change your dump options from minidump to kernel dump

Reboot the computer for the changes to take effect. The next crash that happens should create a dump in \Windows called "Memory.dmp", which can be zipped and then uploaded/linked and shared for us to download and analyze.
My System SpecsSystem Spec

 MUP.SYS cause a BSOD on my PC

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