CVE-2024-35986

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> phy: ti: tusb1210: Resolve charger-det crash if charger psy is unregistered<br /> <br /> The power_supply frame-work is not really designed for there to be<br /> long living in kernel references to power_supply devices.<br /> <br /> Specifically unregistering a power_supply while some other code has<br /> a reference to it triggers a WARN in power_supply_unregister():<br /> <br /> WARN_ON(atomic_dec_return(&amp;psy-&gt;use_cnt));<br /> <br /> Folllowed by the power_supply still getting removed and the<br /> backing data freed anyway, leaving the tusb1210 charger-detect code<br /> with a dangling reference, resulting in a crash the next time<br /> tusb1210_get_online() is called.<br /> <br /> Fix this by only holding the reference in tusb1210_get_online()<br /> freeing it at the end of the function. Note this still leaves<br /> a theoretical race window, but it avoids the issue when manually<br /> rmmod-ing the charger chip driver during development.