Alexey Gladkov (Intel) d4fc4d0147 x86/tdx: Fix "in-kernel MMIO" check ... TDX only supports kernel-initiated MMIO operations. The handle_mmio() function checks if the #VE exception occurred in the kernel and rejects the operation if it did not. However, userspace can deceive the kernel into performing MMIO on its behalf. For example, if userspace can point a syscall to an MMIO address, syscall does get_user() or put_user() on it, triggering MMIO #VE. The kernel will treat the #VE as in-kernel MMIO. Ensure that the target MMIO address is within the kernel before decoding instruction. Fixes: 31d58c4e55 ("x86/tdx: Handle in-kernel MMIO") Signed-off-by: Alexey Gladkov (Intel) <legion@kernel.org> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Cc:stable@vger.kernel.org Link: https://lore.kernel.org/all/565a804b80387970460a4ebc67c88d1380f61ad1.1726237595.git.legion%40kernel.org		2024-09-26 09:45:04 -07:00
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Makefile	x86/tdx: Add unaccepted memory support	2023-06-06 18:25:57 +02:00
tdcall.S	x86/tdx: Reimplement __tdx_hypercall() using TDX_MODULE_CALL asm	2023-09-12 16:30:14 -07:00
tdx-shared.c	x86/virt/tdx: Define TDX supported page sizes as macros	2023-12-08 09:12:00 -08:00
tdx.c	x86/tdx: Fix "in-kernel MMIO" check	2024-09-26 09:45:04 -07:00