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. Signed-off-by: Oleksandr Tymoshenko <ovt@xxxxxxxxxx> --- drivers/firmware/efi/efi.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 8859fb0b006d..800b85807a02 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -203,6 +203,8 @@ static bool generic_ops_supported(void) name_size = sizeof(name); + if (efi.get_next_variable == NULL) + return false; status = efi.get_next_variable(&name_size, &name, &guid); if (status == EFI_UNSUPPORTED) return false; -- 2.44.0.396.g6e790dbe36-goog
