Commit 58b7825b authored by Gleb Natapov's avatar Gleb Natapov Committed by Marcelo Tosatti
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KVM: emulator: fix real mode segment checks in address linearization



In real mode CS register is writable, so do not #GP on write.

Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 0b26b588
......@@ -677,8 +677,9 @@ static int __linearize(struct x86_emulate_ctxt *ctxt,
addr.seg);
if (!usable)
goto bad;
/* code segment or read-only data segment */
if (((desc.type & 8) || !(desc.type & 2)) && write)
/* code segment in protected mode or read-only data segment */
if ((((ctxt->mode != X86EMUL_MODE_REAL) && (desc.type & 8))
|| !(desc.type & 2)) && write)
goto bad;
/* unreadable code segment */
if (!fetch && (desc.type & 8) && !(desc.type & 2))
......
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