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Change History

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

cppc_cpufreq: Fix possible null pointer dereference

cppc_cpufreq_get_rate() and hisi_cppc_cpufreq_get_rate() can be called from
different places with various parameters. So cpufreq_cpu_get() can return
null as 'policy' in some circumstances.
Fix this bug by adding null return check.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

kernel.org https://git.kernel.org/stable/c/769c4f355b7962895205b86ad35617873feef9a5 [No types assigned]

kernel.org https://git.kernel.org/stable/c/9a185cc5a79ba408e1c73375706630662304f618 [No types assigned]

kernel.org https://git.kernel.org/stable/c/b18daa4ec727c0266de5bfc78e818d168cc4aedf [No types assigned]

kernel.org https://git.kernel.org/stable/c/cf7de25878a1f4508c69dc9f6819c21ba177dbfe [No types assigned]

kernel.org https://git.kernel.org/stable/c/dfec15222529d22b15e5b0d63572a9e39570cab4 [No types assigned]

kernel.org https://git.kernel.org/stable/c/f84b9b25d045e67a7eee5e73f21278c8ab06713c [No types assigned]