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    Subject[PATCH 5.5 114/151] efi: Add a sanity check to efivar_store_raw()
    Date
    From: Vladis Dronov <vdronov@redhat.com>

    commit d6c066fda90d578aacdf19771a027ed484a79825 upstream.

    Add a sanity check to efivar_store_raw() the same way
    efivar_{attr,size,data}_read() and efivar_show_raw() have it.

    Signed-off-by: Vladis Dronov <vdronov@redhat.com>
    Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
    Signed-off-by: Ingo Molnar <mingo@kernel.org>
    Cc: <stable@vger.kernel.org>
    Link: https://lore.kernel.org/r/20200305084041.24053-3-vdronov@redhat.com
    Link: https://lore.kernel.org/r/20200308080859.21568-25-ardb@kernel.org
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/firmware/efi/efivars.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/drivers/firmware/efi/efivars.c
    +++ b/drivers/firmware/efi/efivars.c
    @@ -208,6 +208,9 @@ efivar_store_raw(struct efivar_entry *en
    u8 *data;
    int err;

    + if (!entry || !buf)
    + return -EINVAL;
    +
    if (in_compat_syscall()) {
    struct compat_efi_variable *compat;


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