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authorWei Yongjun <yongjun_wei@trendmicro.com.cn>2012-09-02 21:21:46 +0800
committerSamuel Ortiz <sameo@linux.intel.com>2012-09-25 00:17:24 +0200
commit52da2449e10039d3bb04c598d24cb1a34530b716 (patch)
treeec8f1ede07653b09902edb4670efaa2b4cc9269d /net/nfc
parent33e5971358c37851137b264f815977507c016fac (diff)
downloadlinux-52da2449e10039d3bb04c598d24cb1a34530b716.tar.bz2
NFC: Fix possible LLCP memory leak
nfc_llcp_build_tlv() malloced the memory and should be free in nfc_llcp_build_gb() after used, and the same in the error handling case, otherwise it will cause memory leak. spatch with a semantic match is used to found this problem. (http://coccinelle.lip6.fr/) Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'net/nfc')
-rw-r--r--net/nfc/llcp/llcp.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c
index 6f368412ffd2..90ef4a176819 100644
--- a/net/nfc/llcp/llcp.c
+++ b/net/nfc/llcp/llcp.c
@@ -426,6 +426,7 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
u8 *miux_tlv, miux_length;
__be16 miux;
u8 gb_len = 0;
+ int ret = 0;
version = LLCP_VERSION_11;
version_tlv = nfc_llcp_build_tlv(LLCP_TLV_VERSION, &version,
@@ -450,8 +451,8 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
gb_len += ARRAY_SIZE(llcp_magic);
if (gb_len > NFC_MAX_GT_LEN) {
- kfree(version_tlv);
- return -EINVAL;
+ ret = -EINVAL;
+ goto out;
}
gb_cur = local->gb;
@@ -471,12 +472,15 @@ static int nfc_llcp_build_gb(struct nfc_llcp_local *local)
memcpy(gb_cur, miux_tlv, miux_length);
gb_cur += miux_length;
+ local->gb_len = gb_len;
+
+out:
kfree(version_tlv);
kfree(lto_tlv);
+ kfree(wks_tlv);
+ kfree(miux_tlv);
- local->gb_len = gb_len;
-
- return 0;
+ return ret;
}
u8 *nfc_llcp_general_bytes(struct nfc_dev *dev, size_t *general_bytes_len)