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commit f28347cc66395e96712f5c2db0a302ee75bafce6 upstream. While working on XSA-361 and its follow-ups, I failed to spot another place where the kernel mapping part of an operation was not treated the same as the user space part. Detect and propagate errors and add a 2nd pr_debug(). Signed-off-by: Jan Beulich <jbeulich@suse.com> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/c2513395-74dc-aea3-9192-fd265aa44e35@suse.com Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Demi Marie Obenour <demi@invisiblethingslab.com> Co-authored-by: Demi Marie Obenour <demi@invisiblethingslab.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>