CVE-2023-52859

In the Linux kernel, the following vulnerability has been resolved:

perf: hisi: Fix use-after-free when register pmu fails

When we fail to register the uncore pmu, the pmu context may not been allocated. The error handing will call cpuhp_state_remove_instance() to call uncore pmu offline callback, which migrate the pmu context. Since thats liable to lead to some kind of use-after-free.

Use cpuhp_state_remove_instance_nocalls() instead of cpuhp_state_remove_instance() so that the notifiers dont execute after the PMU device has been failed to register.

Weakness

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.

Affected Software

Potential Mitigations

References

• https://git.kernel.org/stable/c/0e1e88bba286621b886218363de07b319d6208b2
• https://git.kernel.org/stable/c/3405f364f82d4f5407a8b4c519dc15d24b847fda
• https://git.kernel.org/stable/c/75bab28ffd05ec8879c197890b1bd1dfec8d3f63
• https://git.kernel.org/stable/c/b660420f449d094b1fabfa504889810b3a63cdd5
• https://git.kernel.org/stable/c/b805cafc604bfdb671fae7347a57f51154afa735
• https://git.kernel.org/stable/c/0e1e88bba286621b886218363de07b319d6208b2
• https://git.kernel.org/stable/c/3405f364f82d4f5407a8b4c519dc15d24b847fda
• https://git.kernel.org/stable/c/75bab28ffd05ec8879c197890b1bd1dfec8d3f63
• https://git.kernel.org/stable/c/b660420f449d094b1fabfa504889810b3a63cdd5
• https://git.kernel.org/stable/c/b805cafc604bfdb671fae7347a57f51154afa735