gsmi: fix null-deref in gsmi_get_variable

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commit a769b05eee upstream.

We can get EFI variables without fetching the attribute, so we must
allow for that in gsmi.

commit 859748255b ("efi: pstore: Omit efivars caching EFI varstore
access layer") added a new get_variable call with attr=NULL, which
triggers panic in gsmi.

Fixes: 74c5b31c66 ("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.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Khazhismel Kumykov 2023-01-17 17:02:12 -08:00 • committed by Greg Kroah-Hartman

parent 1c5aaff754

commit 6646d769fd

1 changed files with 4 additions and 3 deletions

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drivers/firmware/google/gsmi.c

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