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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Navid Emamdoost <navid.emamdoost@gmail.com>,
	Luca Coelho <luciano.coelho@intel.com>,
	Sasha Levin <sashal@kernel.org>,
	linux-wireless@vger.kernel.org, netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.19 582/671] iwlwifi: pcie: fix memory leaks in iwl_pcie_ctxt_info_gen3_init
Date: Thu, 16 Jan 2020 12:03:40 -0500
Message-ID: <20200116170509.12787-319-sashal@kernel.org> (raw)
In-Reply-To: <20200116170509.12787-1-sashal@kernel.org>

From: Navid Emamdoost <navid.emamdoost@gmail.com>

[ Upstream commit 0f4f199443faca715523b0659aa536251d8b978f ]

In iwl_pcie_ctxt_info_gen3_init there are cases that the allocated dma
memory is leaked in case of error.

DMA memories prph_scratch, prph_info, and ctxt_info_gen3 are allocated
and initialized to be later assigned to trans_pcie. But in any error case
before such assignment the allocated memories should be released.

First of such error cases happens when iwl_pcie_init_fw_sec fails.
Current implementation correctly releases prph_scratch. But in two
sunsequent error cases where dma_alloc_coherent may fail, such
releases are missing.

This commit adds release for prph_scratch when allocation for
prph_info fails, and adds releases for prph_scratch and prph_info when
allocation for ctxt_info_gen3 fails.

Fixes: 2ee824026288 ("iwlwifi: pcie: support context information for 22560 devices")
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 .../intel/iwlwifi/pcie/ctxt-info-gen3.c       | 36 +++++++++++++------
 1 file changed, 25 insertions(+), 11 deletions(-)

diff --git a/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c b/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c
index 64d976d872b8..6783b20d9681 100644
--- a/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c
+++ b/drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c
@@ -102,13 +102,9 @@ int iwl_pcie_ctxt_info_gen3_init(struct iwl_trans *trans,
 
 	/* allocate ucode sections in dram and set addresses */
 	ret = iwl_pcie_init_fw_sec(trans, fw, &prph_scratch->dram);
-	if (ret) {
-		dma_free_coherent(trans->dev,
-				  sizeof(*prph_scratch),
-				  prph_scratch,
-				  trans_pcie->prph_scratch_dma_addr);
-		return ret;
-	}
+	if (ret)
+		goto err_free_prph_scratch;
+
 
 	/* Allocate prph information
 	 * currently we don't assign to the prph info anything, but it would get
@@ -116,16 +112,20 @@ int iwl_pcie_ctxt_info_gen3_init(struct iwl_trans *trans,
 	prph_info = dma_alloc_coherent(trans->dev, sizeof(*prph_info),
 				       &trans_pcie->prph_info_dma_addr,
 				       GFP_KERNEL);
-	if (!prph_info)
-		return -ENOMEM;
+	if (!prph_info) {
+		ret = -ENOMEM;
+		goto err_free_prph_scratch;
+	}
 
 	/* Allocate context info */
 	ctxt_info_gen3 = dma_alloc_coherent(trans->dev,
 					    sizeof(*ctxt_info_gen3),
 					    &trans_pcie->ctxt_info_dma_addr,
 					    GFP_KERNEL);
-	if (!ctxt_info_gen3)
-		return -ENOMEM;
+	if (!ctxt_info_gen3) {
+		ret = -ENOMEM;
+		goto err_free_prph_info;
+	}
 
 	ctxt_info_gen3->prph_info_base_addr =
 		cpu_to_le64(trans_pcie->prph_info_dma_addr);
@@ -176,6 +176,20 @@ int iwl_pcie_ctxt_info_gen3_init(struct iwl_trans *trans,
 	iwl_set_bit(trans, CSR_GP_CNTRL, CSR_AUTO_FUNC_INIT);
 
 	return 0;
+
+err_free_prph_info:
+	dma_free_coherent(trans->dev,
+			  sizeof(*prph_info),
+			prph_info,
+			trans_pcie->prph_info_dma_addr);
+
+err_free_prph_scratch:
+	dma_free_coherent(trans->dev,
+			  sizeof(*prph_scratch),
+			prph_scratch,
+			trans_pcie->prph_scratch_dma_addr);
+	return ret;
+
 }
 
 void iwl_pcie_ctxt_info_gen3_free(struct iwl_trans *trans)
-- 
2.20.1


  parent reply index

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20200116170509.12787-1-sashal@kernel.org>
2020-01-16 16:58 ` [PATCH AUTOSEL 4.19 290/671] brcmfmac: fix leak of mypkt on error return path Sasha Levin
2020-01-16 16:59 ` [PATCH AUTOSEL 4.19 338/671] ath10k: Fix encoding for protected management frames Sasha Levin
2020-01-16 17:01 ` [PATCH AUTOSEL 4.19 468/671] libertas_tf: Use correct channel range in lbtf_geo_init Sasha Levin
2020-01-16 17:02 ` [PATCH AUTOSEL 4.19 503/671] mac80211: minstrel_ht: fix per-group max throughput rate initialization Sasha Levin
2020-01-16 17:02 ` [PATCH AUTOSEL 4.19 520/671] bcma: fix incorrect update of BCMA_CORE_PCI_MDIO_DATA Sasha Levin
2020-01-16 17:02 ` [PATCH AUTOSEL 4.19 525/671] ath9k: dynack: fix possible deadlock in ath_dynack_node_{de}init Sasha Levin
2020-01-16 17:02 ` [PATCH AUTOSEL 4.19 526/671] wcn36xx: use dynamic allocation for large variables Sasha Levin
2020-01-16 17:02 ` [PATCH AUTOSEL 4.19 534/671] rtlwifi: Fix file release memory leak Sasha Levin
2020-01-16 17:03 ` [PATCH AUTOSEL 4.19 548/671] ath10k: adjust skb length in ath10k_sdio_mbox_rx_packet Sasha Levin
2020-01-16 17:03 ` [PATCH AUTOSEL 4.19 578/671] mac80211: accept deauth frames in IBSS mode Sasha Levin
2020-01-16 17:03 ` Sasha Levin [this message]
2020-01-16 17:04 ` [PATCH AUTOSEL 4.19 611/671] mt7601u: fix bbp version check in mt7601u_wait_bbp_ready Sasha Levin
2020-01-16 17:04 ` [PATCH AUTOSEL 4.19 616/671] cw1200: Fix a signedness bug in cw1200_load_firmware() Sasha Levin
2020-01-16 17:04 ` [PATCH AUTOSEL 4.19 625/671] rtlwifi: Remove unnecessary NULL check in rtl_regd_init Sasha Levin

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