From: Johannes Berg <johannes.berg@xxxxxxxxx> If the data we get from EFI is not even long enough for the package struct we expect then ignore it entirely. Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx> Fixes: a1a6a4cf49ec ("iwlwifi: pnvm: implement reading PNVM from UEFI") Signed-off-by: Luca Coelho <luciano.coelho@xxxxxxxxx> --- drivers/net/wireless/intel/iwlwifi/fw/pnvm.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/net/wireless/intel/iwlwifi/fw/pnvm.c b/drivers/net/wireless/intel/iwlwifi/fw/pnvm.c index 9b0eee53488a..069fcbc46d2b 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/pnvm.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/pnvm.c @@ -284,9 +284,13 @@ int iwl_pnvm_load(struct iwl_trans *trans, /* First attempt to get the PNVM from BIOS */ package = iwl_uefi_get_pnvm(trans, &len); if (!IS_ERR_OR_NULL(package)) { - /* we need only the data */ - len -= sizeof(*package); - data = kmemdup(package->data, len, GFP_KERNEL); + if (len >= sizeof(*package)) { + /* we need only the data */ + len -= sizeof(*package); + data = kmemdup(package->data, len, GFP_KERNEL); + } else { + data = NULL; + } /* free package regardless of whether kmemdup succeeded */ kfree(package); -- 2.33.0