Bug 1837790

Summary: CVE-2020-0110 kernel: out of boudns write when writing 0 bytes to /proc/pressure/ PSI files
Product: [Other] Security Response Reporter: Wade Mealing <wmealing>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED DUPLICATE QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: airlied, bskeggs, hdegoede, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, john.j5live, jonathan, josef, jwboyer, kernel-maint, labbott, linville, masami256, mchehab, mjg59, steved
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2020-05-20 02:02:54 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 1836943, 1837791    
Bug Blocks:    

Description Wade Mealing 2020-05-20 01:58:20 UTC 
A flaw was found in the Linux kernels implementation of Pressure Stall Information reporting and notification in files in the /proc/filesystem

Issuing write() with count parameter set to 0 on any file under /proc/pressure/ will cause an OOB write to a buffer allocated in kernel.  This could allow for memory corruption or other unspecified consequences.
Comment 1 Wade Mealing 2020-05-20 01:58:24 UTC 
External References:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6fcca0fa48118e6d63733eb4644c6cd880c15b8f
Comment 2 Wade Mealing 2020-05-20 01:59:48 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1837791]
Comment 3 Wade Mealing 2020-05-20 02:02:54 UTC 

*** This bug has been marked as a duplicate of bug 1836936 ***