CVE-2024-56706

Description

In the Linux kernel, the following vulnerability has been resolved: s390/cpum_sf: Fix and protect memory allocation of SDBs with mutex Reservation of the PMU hardware is done at first event creation and is protected by a pair of mutex_lock() and mutex_unlock(). After reservation of the PMU hardware the memory required for the PMUs the event is to be installed on is allocated by allocate_buffers() and alloc_sampling_buffer(). This done outside of the mutex protection. Without mutex protection two or more concurrent invocations of perf_event_init() may run in parallel. This can lead to allocation of Sample Data Blocks (SDBs) multiple times for the same PMU. Prevent this and protect memory allocation of SDBs by mutex.

Reserved 2024-12-27 | Published 2024-12-28 | Updated 2025-01-20 | Assigner Linux

Product status

Default status
unaffected

8a6fe8f21ec4f049a7b1fe120ad50a5065a9c7a8 before 4b3bdfa89635db6a53e02955548bd07bebcae233
affected

8a6fe8f21ec4f049a7b1fe120ad50a5065a9c7a8 before f55bd479d8663a4a4e403b3d308d3d1aa33d92df
affected

Default status
affected

6.12
affected

Any version before 6.12
unaffected

6.12.2
unaffected

6.13
unaffected

References

git.kernel.org/...c/4b3bdfa89635db6a53e02955548bd07bebcae233

git.kernel.org/...c/f55bd479d8663a4a4e403b3d308d3d1aa33d92df

cve.org (CVE-2024-56706)

nvd.nist.gov (CVE-2024-56706)

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