CVE-2022-48994

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> ALSA: seq: Fix function prototype mismatch in snd_seq_expand_var_event<br /> <br /> With clang&amp;#39;s kernel control flow integrity (kCFI, CONFIG_CFI_CLANG),<br /> indirect call targets are validated against the expected function<br /> pointer prototype to make sure the call target is valid to help mitigate<br /> ROP attacks. If they are not identical, there is a failure at run time,<br /> which manifests as either a kernel panic or thread getting killed.<br /> <br /> seq_copy_in_user() and seq_copy_in_kernel() did not have prototypes<br /> matching snd_seq_dump_func_t. Adjust this and remove the casts. There<br /> are not resulting binary output differences.<br /> <br /> This was found as a result of Clang&amp;#39;s new -Wcast-function-type-strict<br /> flag, which is more sensitive than the simpler -Wcast-function-type,<br /> which only checks for type width mismatches.