mirror of
https://github.com/hardkernel/linux.git
synced 2026-06-08 20:07:46 +09:00
1d8c928ed7
[ Upstream commit712f210a45] In preparation for reducing the use of ksize(), record the actual allocation size for later memcpy(). This avoids copying extra (uninitialized!) bytes into the patch buffer when the requested allocation size isn't exactly the size of a kmalloc bucket. Additionally, fix potential future issues where runtime bounds checking will notice that the buffer was allocated to a smaller value than returned by ksize(). Fixes:757885e94a("x86, microcode, amd: Early microcode patch loading support for AMD") Suggested-by: Daniel Micay <danielmicay@gmail.com> Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/lkml/CA+DvKQ+bp7Y7gmaVhacjv9uF6Ar-o4tet872h4Q8RPYPJjcJQA@mail.gmail.com/ Signed-off-by: Sasha Levin <sashal@kernel.org>