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  1. Bug #1550596
  2. Comment #0

Comment 0 for bug 1550596

Revision history for this message
Colin Ian King (colin-king) wrote :

Since 4.4, I have not been able to boot GNU Hurd Kernels using KVM QEMU. I tracked this regression down to commit e8dd2d2d641c ("Silence compiler warning in arch/x86/kvm/emulate.c", 2015-09-06)

This has been recently fixed with upstream commit 0c1d77f4ba5cc9c05a29adca3d6466cdf4969b70:

    KVM: x86: fix conversion of addresses to linear in 32-bit protected mode

    Commit e8dd2d2d641c ("Silence compiler warning in arch/x86/kvm/emulate.c",
    2015-09-06) broke boot of the Hurd. The bug is that the "default:"
    case actually could modify "la", but after the patch this change is
    not reflected in *linear.

    The bug is visible whenever a non-zero segment base causes the linear
    address to wrap around the 4GB mark.

    Fixes: e8dd2d2d641cb2724ee10e76c0ad02e04289c017
    Cc: <email address hidden>
    Reported-by: Aurelien Jarno <email address hidden>
    Tested-by: Aurelien Jarno <email address hidden>
    Signed-off-by: Paolo Bonzini <email address hidden>