kernel-packages team mailing list archive

[Colin Ian King <1550596@xxxxxxxxxxxxxxxxxx>]

Fix sent to kernel team mailing list for review and inclusion into 4.4
Xenial linux kernel: https://lists.ubuntu.com/archives/kernel-
team/2016-February/072324.html

** Description changed:

  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: stable@xxxxxxxxxxxxxxx
-     Reported-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
-     Tested-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
-     Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
+ 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: stable@xxxxxxxxxxxxxxx
+ Reported-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
+ Tested-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
+ Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>

-- 
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1550596

Title:
  kvm fails to boot GNU Hurd kernels with 4.4 Xenial kernel

Status in linux package in Ubuntu:
  In Progress

Bug description:
  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: stable@xxxxxxxxxxxxxxx
  Reported-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
  Tested-by: Aurelien Jarno <aurelien@xxxxxxxxxxx>
  Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>

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