xen/netfront: fix leaking data in shared pages
commit 307c8de2 upstream. When allocating pages to be used for shared communication with the backend always zero them, this avoids leaking unintended data present on the pages. This is CVE-2022-33740, part of XSA-403. Signed-off-by:Roger Pau Monné <roger.pau@citrix.com> Reviewed-by:
Jan Beulich <jbeulich@suse.com> Reviewed-by:
Juergen Gross <jgross@suse.com> Signed-off-by:
Juergen Gross <jgross@suse.com> Signed-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
f4a13911
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