BSOD " unexpected kernel mode trap" when running software(exe file) on webdav disk

Xin Ge 5 Reputation points
2025-07-05T04:46:15.4533333+00:00

ENGLISH_VERSION

hello there

i have a problem:

After executing the executable file in the mounted webdav, a blue screen will definitely appear with an error of "unexpected kernel mode trap"

——————

At first, after execution, the error was " The file size exceeds the allowed limit and cannot be saved". Then I followed a guide on the Internet:

Modify the local registry configuration: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WebClient\Parameters, find the FileSizeLimitInBytes value, its default value is: 50000000, change its decimal to: 4294967295. (Unit: Bytes)

After that, it can be executed, but a blue screen will appear (after executing, confirming the security risk, the blue screen will appear immediately)

——————

I know, I can upload the dump and ask the experts here to help analyze the cause.

really Thanks a lot for your help.

I forgot where to find the dump file. . .

thanks to everyone hope you all there have a good good day and life

Windows for home | Windows 10 | Performance and system failures
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3 answers

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  1. Alexandr S 155 Reputation points Independent Advisor
    2025-07-05T05:53:42.5266667+00:00

    Hello.

    [070525-13078-01.dmp]

    UNEXPECTED_KERNEL_MODE_TRAP (7f)

    This means a trap occurred in kernel mode, and it's a trap of a kind

    that the kernel isn't allowed to have/catch (bound trap) or that

    is always instant death (double fault). The first number in the

    BugCheck params is the number of the trap (8 = double fault, etc)

    Consult an Intel x86 family manual to learn more about what these

    traps are. Here is a portion of those codes:

    If kv shows a taskGate

        use .tss on the part before the colon, then kv.
    

    Else if kv shows a trapframe

        use .trap on that value
    

    Else

        .trap on the appropriate frame will show where the trap was taken
    
        (on x86, this will be the ebp that goes with the procedure KiTrap)
    

    Endif

    kb will then show the corrected stack.

    Arguments:

    Arg1: 0000000000000008, EXCEPTION_DOUBLE_FAULT

    Arg2: ffffa400bdbf8e50

    Arg3: fffff509eeb48ff0

    Arg4: fffff8028371ff99

    *** WARNING: Unable to verify timestamp for sysdiag.sys

    ....

    PROCESS_NAME: re4.exe

    MODULE_NAME: rdbss

    IMAGE_NAME: rdbss.sys

    IMAGE_VERSION: 10.0.19041.5848

    FAILURE_BUCKET_ID: 0x7f_8_rdbss!RxFsdCommonDispatch

    .............................

    Stack overflow error caused by an application (process) re4.exe when referring to Redirected Drive Buffering SubSystem. The probable causes may be different, ranging from incorrect re4 application code to hardware problems with the hard disk or memory (according to stack information).

    Unfortunately, due to the peculiarities of writing this dump, the debugger command to output hardware information does not work, so it is not possible to check, for example, memory modules.

    First, carefully examine the source code of your application for correct access to the OS drivers. For a more detailed review of the source code, I recommend asking a question about problematic areas of the code in the developer help section (the "Windows Development" tag, the "Windows API" child tag —

    Win32"), so that programming specialists can help you.


  2. Alexandr S 155 Reputation points Independent Advisor
    2025-07-05T12:24:59.2166667+00:00

    Yes, please send 3-4 dump files for analysis. This will help you understand the source of the problems.


  3. Alexandr S 155 Reputation points Independent Advisor
    2025-07-06T10:15:23.9833333+00:00

    Unfortunately, only two dumps are available at the link: 070525-13078-01 .dmp (already processed earlier) and 070625-12968-01 .dmp. OneDrive has been working incorrectly for many lately. Please pack all 4 dumps into one archive.zip and write the link to the archive.


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