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Date: Fri, 23 Jul 2021 17:35:26 +0300 From: Dan Carpenter <dan.carpenter@...cle.com> To: Colin King <colin.king@...onical.com> Cc: Luca Coelho <luciano.coelho@...el.com>, Kalle Valo <kvalo@...eaurora.org>, "David S . Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] iwlwifi: Fix memory leak on reduce_power_data buffer On Fri, Jul 23, 2021 at 03:11:52PM +0100, Colin King wrote: > From: Colin Ian King <colin.king@...onical.com> > > In the error case where the TLV length is invalid the allocated > reduce_power_data buffer pointer is set to ERR_PTR(-EINVAL) without > first kfree'ing any previous allocated memory. Fix this memory > leak by kfree'ing it before taking the error return path. > > Addresses-Coverity: ("Resource leak") > Fixes: 9dad325f9d57 ("iwlwifi: support loading the reduced power table from UEFI") > Signed-off-by: Colin Ian King <colin.king@...onical.com> > --- > drivers/net/wireless/intel/iwlwifi/fw/uefi.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c > index a7c79d814aa4..413bfb2ae54d 100644 > --- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c > +++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c > @@ -86,6 +86,7 @@ static void *iwl_uefi_reduce_power_section(struct iwl_trans *trans, > if (len < tlv_len) { ^^^^^^^^^^^^^ Not related to your patch but probably this comparison aught to be done against aligned tlv_len. tlv_len = ALIGN(tlv_len, 4); if (len < tlv_len) { Especially in the iwl_uefi_reduce_power_parse() function. Or maybe just if (tlv_len % 0x4 || len < tlv_len)? regards, dan carpenter
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