Linux x86_32 entry_32 NMI return CPU buffer clearing fix

From this webpage screenshot, we can extract the following key information about the vulnerability: 1. Vulnerability Description: - The vulnerability is described as "x86/entry_32: Clear CPU buffers after register restore in NMI return". - It occurs in the function on the x86 architecture, specifically during the NMI return process, where CPU buffers need to be cleared. 2. Fix Measures: - The fix involves moving the instruction from before to after it. - This ensures that CPU buffers are cleared during NMI return, satisfying the requirements of RDFS (Return to User Space). 3. Fix Code: - The fix is located in the file . - The specific change includes adding the instruction before the NMI return. 4. Fix History: - The commit ID for the fix is . - The author of the fix is Pawan Gupta, with the commit date being September 25, 2024. - The patch was submitted by Greg Kroah-Hartman on October 22, 2024. 5. Reason for Fix: - The issue arises because CPU buffers were being cleared before the NMI return, but they need to be cleared after the NMI return to meet RDFS requirements. - The purpose of the fix is to ensure CPU buffers are cleared at the correct time during NMI return to satisfy RDFS. 6. Impact of Fix: - The fix affects the file . - The change includes inserting the instruction before the NMI return. With this information, we can understand the vulnerability's fix process, the specific measures taken, and the exact location and scope of the code changes.

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Linux x86_32 entry_32 NMI return CPU buffer clearing fix