Description
In the Linux kernel, the following vulnerability has been resolved: HID: hyperv: avoid struct memcpy overrun warning A previous patch addressed the fortified memcpy warning for most builds, but I still see this one with gcc-9: In file included from include/linux/string.h:254, from drivers/hid/hid-hyperv.c:8: In function 'fortify_memcpy_chk', inlined from 'mousevsc_on_receive' at drivers/hid/hid-hyperv.c:272:3: include/linux/fortify-string.h:583:4: error: call to '__write_overflow_field' declared with attribute warning: detected write beyond size of field (1st parameter); maybe use struct_group()? [-Werror=attribute-warning] 583 | __write_overflow_field(p_size_field, size); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ My guess is that the WARN_ON() itself is what confuses gcc, so it no longer sees that there is a correct range check. Rework the code in a way that helps readability and avoids the warning.
Product status
542f25a94471570e2594be5b422b9ca572cf88a1 before a7902cc5f5b9c95997017c8e309da760fb1deb6e
542f25a94471570e2594be5b422b9ca572cf88a1 before 5f151364b1da6bd217632fd4ee8cc24eaf66a497
6.2
Any version before 6.2
6.4.5
6.5
References
git.kernel.org/...c/a7902cc5f5b9c95997017c8e309da760fb1deb6e
git.kernel.org/...c/5f151364b1da6bd217632fd4ee8cc24eaf66a497
