Bug 2368522 (CVE-2025-37940)

Summary: CVE-2025-37940 kernel: ftrace: Add cond_resched() to ftrace_graph_set_hash()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-26 07:03:53 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ftrace: Add cond_resched() to ftrace_graph_set_hash()

When the kernel contains a large number of functions that can be traced,
the loop in ftrace_graph_set_hash() may take a lot of time to execute.
This may trigger the softlockup watchdog.

Add cond_resched() within the loop to allow the kernel to remain
responsive even when processing a large number of functions.

This matches the cond_resched() that is used in other locations of the
code that iterates over all functions that can be traced.
Comment 1 Avinash Hanwate 2025-05-26 11:50:30 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025052028-CVE-2025-37940-37d1@gregkh/T