CVE-2022-50382

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> padata: Always leave BHs disabled when running -&gt;parallel()<br /> <br /> A deadlock can happen when an overloaded system runs -&gt;parallel() in the<br /> context of the current task:<br /> <br /> padata_do_parallel<br /> -&gt;parallel()<br /> pcrypt_aead_enc/dec<br /> padata_do_serial<br /> spin_lock(&amp;reorder-&gt;lock) // BHs still enabled<br /> <br /> ...<br /> __do_softirq<br /> ...<br /> padata_do_serial<br /> spin_lock(&amp;reorder-&gt;lock)<br /> <br /> It&amp;#39;s a bug for BHs to be on in _do_serial as Steffen points out, so<br /> ensure they&amp;#39;re off in the "current task" case like they are in<br /> padata_parallel_worker to avoid this situation.