Bug 2312069 (CVE-2024-46681)

Summary: CVE-2024-46681 kernel: pktgen: use cpus_read_lock() in pg_net_init()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Bug Depends On: 2312184    
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Description OSIDB Bzimport 2024-09-13 06:20:54 UTC 
In the Linux kernel, the following vulnerability has been resolved:

pktgen: use cpus_read_lock() in pg_net_init()

I have seen the WARN_ON(smp_processor_id() != cpu) firing
in pktgen_thread_worker() during tests.

We must use cpus_read_lock()/cpus_read_unlock()
around the for_each_online_cpu(cpu) loop.

While we are at it use WARN_ON_ONCE() to avoid a possible syslog flood.
Comment 1 Michal Findra 2024-09-13 11:46:13 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024091337-CVE-2024-46681-6086@gregkh/T