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Xen/x86: also check kernel mapping in set_foreign_p2m_mapping()
authorJan Beulich <jbeulich@suse.com>
Mon, 15 Feb 2021 07:50:08 +0000 (08:50 +0100)
committerJuergen Gross <jgross@suse.com>
Mon, 15 Feb 2021 07:50:08 +0000 (08:50 +0100)
commitb512e1b077e5ccdbd6e225b15d934ab12453b70a
tree3400354ce158db8092efaffa987542d9d72403a4tree | snapshot
parenta35f2ef3b7376bfd0a57f7844bd7454389aae1fccommit | diff
Xen/x86: also check kernel mapping in set_foreign_p2m_mapping()

We should not set up further state if either mapping failed; paying
attention to just the user mapping's status isn't enough.

Also use GNTST_okay instead of implying its value (zero).

This is part of XSA-361.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Cc: stable@vger.kernel.org
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
arch/x86/xen/p2m.c diff | blob | history
ep93xx device tree rework repo: git://git.maquefel.me/linux.git