efi: fix panic in kdump kernel
Check if get_next_variable() is actually valid pointer before
calling it. In kdump kernel this method is set to NULL that causes
panic during the kexec-ed kernel boot.
Tested with QEMU and OVMF firmware.
BUG=b/331273554
TEST=presubmit
RELEASE_NOTE=None
Fixes: bad267f9e18f ("efi: verify that variable services are supported")
Cc: stable@vger.kernel.org
Change-Id: I0391133d59c9cba4ba138ff5cbaa25f0419ce819
Signed-off-by: Oleksandr Tymoshenko <ovt@google.com>
Reviewed-on: https://cos-review.googlesource.com/c/third_party/kernel/+/68170
Tested-by: Cusky Presubmit Bot <presubmit@cos-infra-prod.iam.gserviceaccount.com>
Reviewed-by: Kevin Berry <kpberry@google.com>
1 file changed
