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Change History

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

genirq/irqdesc: Prevent use-after-free in irq_find_at_or_after()

irq_find_at_or_after() dereferences the interrupt descriptor which is
returned by mt_find() while neither holding sparse_irq_lock nor RCU read
lock, which means the descriptor can be freed between mt_find() and the
dereference:

    CPU0                            CPU1
    desc = mt_find()
                                    delayed_free_desc(desc)
    irq_desc_g

kernel.org https://git.kernel.org/stable/c/1c7891812d85500ae2ca4051fa5683fcf29930d8 [No types assigned]

kernel.org https://git.kernel.org/stable/c/b84a8aba806261d2f759ccedf4a2a6a80a5e55ba [No types assigned]

kernel.org https://git.kernel.org/stable/c/d084aa022f84319f8079e30882cbcbc026af9f21 [No types assigned]