> -----Original Message-----
> From: linux-kernel-ow...@vger.kernel.org [mailto:linux-kernel-
> ow...@vger.kernel.org] On Behalf Of Matt Fleming
> Sent: Friday, May 06, 2016 4:39 PM
...
> Subject: [PATCH 2/5] efibc: Fix excessive stack footprint warning
>
> From: Jeremy Compostella <jeremy.composte...@intel.com>
>
...
>
> -static void efibc_set_variable(const char *name, const char *value)
> +static int efibc_set_variable(const char *name, const char *value)
> {
> int ret;
> efi_guid_t guid = LINUX_EFI_LOADER_ENTRY_GUID;
> - struct efivar_entry entry;
> + struct efivar_entry *entry;
> size_t size = (strlen(value) + 1) * sizeof(efi_char16_t);
>
> - if (size > sizeof(entry.var.Data))
> + if (size > sizeof(entry->var.Data)) {
> pr_err("value is too large");
That pr_err is introduced by patch 25/40 of the first series.
How about including the name of the variable for which this is failing,
like the final pr_err?
> + return -EINVAL;
> + }
>
> - efibc_str_to_str16(name, entry.var.VariableName);
> - efibc_str_to_str16(value, (efi_char16_t *)entry.var.Data);
> - memcpy(&entry.var.VendorGuid, &guid, sizeof(guid));
> + entry = kmalloc(sizeof(*entry), GFP_KERNEL);
> + if (!entry) {
> + pr_err("failed to allocate efivar entry");
How about including the name of the variable for which this
is failing, like the final pr_err?
> + return -ENOMEM;
> + }
>
> - ret = efivar_entry_set(&entry,
> + efibc_str_to_str16(name, entry->var.VariableName);
> + efibc_str_to_str16(value, (efi_char16_t *)entry->var.Data);
> + memcpy(&entry->var.VendorGuid, &guid, sizeof(guid));
> +
> + ret = efivar_entry_set(entry,
> EFI_VARIABLE_NON_VOLATILE
> | EFI_VARIABLE_BOOTSERVICE_ACCESS
> | EFI_VARIABLE_RUNTIME_ACCESS,
> - size, entry.var.Data, NULL);
> + size, entry->var.Data, NULL);
> if (ret)
> pr_err("failed to set %s EFI variable: 0x%x\n",
> name, ret);
> +
> + kfree(entry);
> + return ret;
> }
