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authorMark A. Greer <mgreer@animalcreek.com>2014-09-23 16:38:02 -0700
committerSamuel Ortiz <sameo@linux.intel.com>2014-11-28 12:37:47 +0100
commitb15829ba5e82b919513f8ac70e97b4e474fae641 (patch)
treec7a64e6e7db2d9de2af319b8b3a91f3310037da8 /net/nfc
parent18ca43823f3ce111c6efb8cc90d9f35246527727 (diff)
downloadblackbird-op-linux-b15829ba5e82b919513f8ac70e97b4e474fae641.tar.gz
blackbird-op-linux-b15829ba5e82b919513f8ac70e97b4e474fae641.zip
NFC: digital: Fix potential skb leaks in NFC-DEP code
When digital_in_send_cmd() or digital_tg_send_cmd() fail, they do not free the skb that was passed to them so the routine that allocated the skb should free it. Currently, there are several routines in the NFC-DEP code that don't do this so make them. Reviewed-by: Thierry Escande <thierry.escande@linux.intel.com> Tested-by: Thierry Escande <thierry.escande@linux.intel.com> Signed-off-by: Mark A. Greer <mgreer@animalcreek.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/digital_dep.c25
1 files changed, 17 insertions, 8 deletions
diff --git a/net/nfc/digital_dep.c b/net/nfc/digital_dep.c
index b60aa35c074f..70fcce03e8a9 100644
--- a/net/nfc/digital_dep.c
+++ b/net/nfc/digital_dep.c
@@ -198,6 +198,7 @@ static int digital_in_send_psl_req(struct nfc_digital_dev *ddev,
{
struct sk_buff *skb;
struct digital_psl_req *psl_req;
+ int rc;
skb = digital_skb_alloc(ddev, sizeof(*psl_req));
if (!skb)
@@ -217,8 +218,12 @@ static int digital_in_send_psl_req(struct nfc_digital_dev *ddev,
ddev->skb_add_crc(skb);
- return digital_in_send_cmd(ddev, skb, 500, digital_in_recv_psl_res,
- target);
+ rc = digital_in_send_cmd(ddev, skb, 500, digital_in_recv_psl_res,
+ target);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
}
static void digital_in_recv_atr_res(struct nfc_digital_dev *ddev, void *arg,
@@ -286,6 +291,7 @@ int digital_in_send_atr_req(struct nfc_digital_dev *ddev,
struct sk_buff *skb;
struct digital_atr_req *atr_req;
uint size;
+ int rc;
size = DIGITAL_ATR_REQ_MIN_SIZE + gb_len;
@@ -325,8 +331,12 @@ int digital_in_send_atr_req(struct nfc_digital_dev *ddev,
ddev->skb_add_crc(skb);
- return digital_in_send_cmd(ddev, skb, 500, digital_in_recv_atr_res,
- target);
+ rc = digital_in_send_cmd(ddev, skb, 500, digital_in_recv_atr_res,
+ target);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
}
static int digital_in_send_rtox(struct nfc_digital_dev *ddev,
@@ -357,6 +367,8 @@ static int digital_in_send_rtox(struct nfc_digital_dev *ddev,
rc = digital_in_send_cmd(ddev, skb, 1500, digital_in_recv_dep_res,
data_exch);
+ if (rc)
+ kfree_skb(skb);
return rc;
}
@@ -634,7 +646,6 @@ static int digital_tg_send_psl_res(struct nfc_digital_dev *ddev, u8 did,
rc = digital_tg_send_cmd(ddev, skb, 0, digital_tg_send_psl_res_complete,
(void *)(unsigned long)rf_tech);
-
if (rc)
kfree_skb(skb);
@@ -758,10 +769,8 @@ static int digital_tg_send_atr_res(struct nfc_digital_dev *ddev,
rc = digital_tg_send_cmd(ddev, skb, 999,
digital_tg_send_atr_res_complete, NULL);
- if (rc) {
+ if (rc)
kfree_skb(skb);
- return rc;
- }
return rc;
}
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