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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sev	x86/sev: Fix __reserved field in sev_config	2024-07-30 10:07:26 +02:00
tdx	x86/tdx: Fix "in-kernel MMIO" check	2024-09-26 09:45:04 -07:00
core.c	cpu/hotplug, x86/acpi: Disable CPU offlining for ACPI MADT wakeup	2024-06-17 17:45:34 +02:00
Makefile	x86/sev: Move SEV compilation units	2024-07-11 11:55:58 +02:00