add vma sanity check in create_existing_sysmem (drivers/hv/dxgkrnl/dxgvmbus.c)

[floracqj]

Windows Version

Microsoft Windows [Version 10.0.22631.3527]

WSL Version

2.2.4.0

Are you using WSL 1 or WSL 2?

• WSL 2
• WSL 1

Kernel Version

5.15.153.1

Distro Version

Ubuntu 22.04

Other Software

No response

Repro Steps

use dxgkio_create_allocation and the CPU memory to create a GPU allocation. the CPU memory is invalid.

Expected Behavior

create_existing_sysmem() check vma sanity first and doesn't try to pin/get_user_pages_fast() if the sanity test fails.
It's better to have checks like:
do {
vma = vma_lookup(mm, start);
if (!vma) {
// trace error and return
}
start = min(end, vma->vm_end);
} while (start < end);

Actual Behavior

create_existing_sysmem() try to pin/get_user_pages() with invalid vma and get error log:
[ 2565.965121] misc dxg: dxgk: create_existing_sysmem: get_user_pages_fast failed: 103
[ 2565.966084] misc dxg: dxgk: dxgkio_create_allocation: Ioctl failed: -12

Diagnostic Logs

No response

[github-actions]

Logs are required for review from WSL team

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Otherwise please attach logs by following the instructions below, your issue will not be reviewed unless they are added. These logs will help us understand what is going on in your machine.

How to collect WSL logs

Download and execute collect-wsl-logs.ps1 in an administrative powershell prompt:

Invoke-WebRequest -UseBasicParsing "https://raw.githubusercontent.com/microsoft/WSL/master/diagnostics/collect-wsl-logs.ps1" -OutFile collect-wsl-logs.ps1
Set-ExecutionPolicy Bypass -Scope Process -Force
.\collect-wsl-logs.ps1

The scipt will output the path of the log file once done.

Once completed please upload the output files to this Github issue.

Click here for more info on logging
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View similar issues

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it!

Open similar issues:

• Use pin_user_pages_fast instead of get_user_pages_fast in create_existing_sysmem(drivers/hv/dxgkrnl/dxgvmbus.c) (#11095), similarity score: 0.77

Note: You can give me feedback by thumbs upping or thumbs downing this comment.

[github-actions]

Logs are required for review from WSL team

If this a feature request, please reply with '/feature'. If this is a question, reply with '/question'.
Otherwise please attach logs by following the instructions below, your issue will not be reviewed unless they are added. These logs will help us understand what is going on in your machine.

How to collect WSL logs

Download and execute collect-wsl-logs.ps1 in an administrative powershell prompt:

Invoke-WebRequest -UseBasicParsing "https://raw.githubusercontent.com/microsoft/WSL/master/diagnostics/collect-wsl-logs.ps1" -OutFile collect-wsl-logs.ps1
Set-ExecutionPolicy Bypass -Scope Process -Force
.\collect-wsl-logs.ps1

The scipt will output the path of the log file once done.

Once completed please upload the output files to this Github issue.

Click here for more info on logging
If you choose to email these logs instead of attaching to the bug, please send them to wsl-gh-logs@microsoft.com with the number of the github issue in the subject, and in the message a link to your comment in the github issue and reply with '/emailed-logs'.

View similar issues

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it!

Open similar issues:

• Use pin_user_pages_fast instead of get_user_pages_fast in create_existing_sysmem(drivers/hv/dxgkrnl/dxgvmbus.c) (#11095), similarity score: 0.77

Note: You can give me feedback by thumbs upping or thumbs downing this comment.

[github-actions]

Logs are required for review from WSL team

If this a feature request, please reply with '/feature'. If this is a question, reply with '/question'.
Otherwise please attach logs by following the instructions below, your issue will not be reviewed unless they are added. These logs will help us understand what is going on in your machine.

How to collect WSL logs

Download and execute collect-wsl-logs.ps1 in an administrative powershell prompt:

Invoke-WebRequest -UseBasicParsing "https://raw.githubusercontent.com/microsoft/WSL/master/diagnostics/collect-wsl-logs.ps1" -OutFile collect-wsl-logs.ps1
Set-ExecutionPolicy Bypass -Scope Process -Force
.\collect-wsl-logs.ps1

The scipt will output the path of the log file once done.

Once completed please upload the output files to this Github issue.

Click here for more info on logging
If you choose to email these logs instead of attaching to the bug, please send them to wsl-gh-logs@microsoft.com with the number of the github issue in the subject, and in the message a link to your comment in the github issue and reply with '/emailed-logs'.

View similar issues

Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it!

Open similar issues:

• Use pin_user_pages_fast instead of get_user_pages_fast in create_existing_sysmem(drivers/hv/dxgkrnl/dxgvmbus.c) (#11095), similarity score: 0.77

Note: You can give me feedback by thumbs upping or thumbs downing this comment.

[github-actions]

The log file doesn't contain any WSL traces. Please make sure that you reproduced the issue while the log collection was running.

Diagnostic information

Detected appx version: 2.2.4.0
Found no WSL traces in the logs

[floracqj]

/question

[github-actions]

Diagnostic information

Found '/question', adding tag 'question'

[OneBlue]

@iourit to look into this

[floracqj]

ping?