CVE-2022-49905

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net/smc: Fix possible leaked pernet namespace in smc_init()<br /> <br /> In smc_init(), register_pernet_subsys(&amp;smc_net_stat_ops) is called<br /> without any error handling.<br /> If it fails, registering of &amp;smc_net_ops won&amp;#39;t be reverted.<br /> And if smc_nl_init() fails, &amp;smc_net_stat_ops itself won&amp;#39;t be reverted.<br /> <br /> This leaves wild ops in subsystem linkedlist and when another module<br /> tries to call register_pernet_operations() it triggers page fault:<br /> <br /> BUG: unable to handle page fault for address: fffffbfff81b964c<br /> RIP: 0010:register_pernet_operations+0x1b9/0x5f0<br /> Call Trace:<br /> <br /> register_pernet_subsys+0x29/0x40<br /> ebtables_init+0x58/0x1000 [ebtables]<br /> ...