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Change History

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 that's 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 do

kernel.org https://git.kernel.org/stable/c/0e1e88bba286621b886218363de07b319d6208b2 [No types assigned]

kernel.org https://git.kernel.org/stable/c/3405f364f82d4f5407a8b4c519dc15d24b847fda [No types assigned]

kernel.org https://git.kernel.org/stable/c/75bab28ffd05ec8879c197890b1bd1dfec8d3f63 [No types assigned]

kernel.org https://git.kernel.org/stable/c/b660420f449d094b1fabfa504889810b3a63cdd5 [No types assigned]

kernel.org https://git.kernel.org/stable/c/b805cafc604bfdb671fae7347a57f51154afa735 [No types assigned]