gsmi: fix null-deref in gsmi_get_variable
We can get EFI variables without fetching the attribute, so we must allow for that in gsmi. commit 85974825 ("efi: pstore: Omit efivars caching EFI varstore access layer") added a new get_variable call with attr=NULL, which triggers panic in gsmi. Fixes: 74c5b31c ("driver: Google EFI SMI") Cc: stable <stable@kernel.org> Signed-off-by:Khazhismel Kumykov <khazhy@google.com> Link: https://lore.kernel.org/r/20230118010212.1268474-1-khazhy@google.comSigned-off-by:
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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