tree 73703f51dcce80a433eb6e628f59258896e2319b
parent bc79a3179a1da387d730af81ce857d481915efdb
author Nadav Amit <namit@cs.technion.ac.il> 1414922087 +0200
committer Paolo Bonzini <pbonzini@redhat.com> 1415187418 +0100

KVM: x86: Fix uninitialized op->type for some immediate values

The emulator could reuse an op->type from a previous instruction for some
immediate values.  If it mistakenly considers the operands as memory
operands, it will performs a memory read and overwrite op->val.

Consider for instance the ROR instruction - src2 (the number of times)
would be read from memory instead of being used as immediate.

Mark every immediate operand as such to avoid this problem.

Cc: stable@vger.kernel.org
Fixes: c44b4c6ab80eef3a9c52c7b3f0c632942e6489aa
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>