x86/sev-es: Use __copy_from_user_inatomic()

The #VC handler must run in atomic context and cannot sleep. This is a
problem when it tries to fetch instruction bytes from user-space via
copy_from_user().

Introduce a insn_fetch_from_user_inatomic() helper which uses
__copy_from_user_inatomic() to safely copy the instruction bytes to
kernel memory in the #VC handler.

Fixes: 5e3427a7bc432 ("x86/sev-es: Handle instruction fetches from user-space")
Signed-off-by: Joerg Roedel <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Cc: [email protected] # v5.10+
Link: https://lkml.kernel.org/r/[email protected]

0 files changed, 0 insertions, 0 deletions