https://github.com/torvalds/linux
Revision cadfad870154e14f745ec845708bc17d166065f2 authored by Andy Lutomirski on 17 July 2020, 23:53:55 UTC, committed by Thomas Gleixner on 18 July 2020, 10:31:49 UTC
tss_invalidate_io_bitmap() wasn't wired up properly through the pvop
machinery, so the TSS and Xen's io bitmap would get out of sync
whenever disabling a valid io bitmap.

Add a new pvop for tss_invalidate_io_bitmap() to fix it.

This is XSA-329.

Fixes: 22fe5b0439dd ("x86/ioperm: Move TSS bitmap update to exit to user work")
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/d53075590e1f91c19f8af705059d3ff99424c020.1595030016.git.luto@kernel.org

1 parent 81e9685
History
Tip revision: cadfad870154e14f745ec845708bc17d166065f2 authored by Andy Lutomirski on 17 July 2020, 23:53:55 UTC
x86/ioperm: Fix io bitmap invalidation on Xen PV
Tip revision: cadfad8
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