CVE-2023-53553

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> HID: hyperv: avoid struct memcpy overrun warning<br /> <br /> A previous patch addressed the fortified memcpy warning for most<br /> builds, but I still see this one with gcc-9:<br /> <br /> In file included from include/linux/string.h:254,<br /> from drivers/hid/hid-hyperv.c:8:<br /> In function &amp;#39;fortify_memcpy_chk&amp;#39;,<br /> inlined from &amp;#39;mousevsc_on_receive&amp;#39; at drivers/hid/hid-hyperv.c:272:3:<br /> include/linux/fortify-string.h:583:4: error: call to &amp;#39;__write_overflow_field&amp;#39; declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning]<br /> 583 | __write_overflow_field(p_size_field, size);<br /> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br /> <br /> My guess is that the WARN_ON() itself is what confuses gcc, so it no<br /> longer sees that there is a correct range check. Rework the code in a<br /> way that helps readability and avoids the warning.