Skip to content
Commit bbf9ac34 authored by Rick Edgecombe's avatar Rick Edgecombe Committed by Wei Liu
Browse files

hv_netvsc: Don't free decrypted memory



In CoCo VMs it is possible for the untrusted host to cause
set_memory_encrypted() or set_memory_decrypted() to fail such that an
error is returned and the resulting memory is shared. Callers need to
take care to handle these errors to avoid returning decrypted (shared)
memory to the page allocator, which could lead to functional or security
issues.

The netvsc driver could free decrypted/shared pages if
set_memory_decrypted() fails. Check the decrypted field in the gpadl
to decide whether to free the memory.

Signed-off-by: default avatarRick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: default avatarMichael Kelley <mhklinux@outlook.com>
Reviewed-by: default avatarKuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Acked-by: default avatarKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: https://lore.kernel.org/r/20240311161558.1310-4-mhklinux@outlook.com


Signed-off-by: default avatarWei Liu <wei.liu@kernel.org>
Message-ID: <20240311161558.1310-4-mhklinux@outlook.com>
parent 211f514e
Loading
Loading
Loading
Loading
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Please register or to comment