** Also affects: linux (Ubuntu Xenial)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Yakkety)
Importance: Wishlist
Assignee: Tim Gardner (timg-tpi)
Status: Fix Released
** Changed in: linux (Ubuntu Xenial)
Status: New => In Progress
** Changed in: linux (Ubuntu Xenial)
Assignee: (unassigned) => Tim Gardner (timg-tpi)
** Changed in: linux (Ubuntu Yakkety)
Status: Fix Released => In Progress
** Changed in: linux (Ubuntu Yakkety)
Milestone: None => ubuntu-16.10
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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1499089
Title:
Please enable kconfig X86_LEGACY_VM86 for i386
Status in linux package in Ubuntu:
In Progress
Status in linux source package in Wily:
Fix Released
Status in linux source package in Xenial:
In Progress
Status in linux source package in Yakkety:
In Progress
Bug description:
In order for dosemu to reach maximum performance (a > 10x speedup) please
enable kconfig X86_LEGACY_VM86 in the kernel. As of this commit
http://www.spinics.net/lists/linux-tip-commits/msg30360.html
the overzealous kconfig message that seemed to suggest that the vm86()
syscall was a security hazard in itself has been revised to reflect reality.
Also please note that even if this kconfig option is enabled the runtime
default is still off as vm86 is only actually enabled if the sysctl
vm.mmap_min_addr is set to 0. That said, allowing vm.mmap_min_addr=0 is a
known security risk and enabling the vm86() syscall to operate additionally
would add little value to any potential attacker.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1499089/+subscriptions
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