diff options
| author | Xiaoming Ni <nixiaoming@huawei.com> | 2021-03-25 11:51:12 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-16 11:57:47 +0200 |
| commit | 02b99cae71335f9f38d0a164ffe3a7a1328f44fc (patch) | |
| tree | e61e762df8e3430eeac5d3230e9ef47cfe270074 /net/nfc | |
| parent | b1d5c07a3b597766bbf5bf61083cd65e72034144 (diff) | |
| download | linux-rt-02b99cae71335f9f38d0a164ffe3a7a1328f44fc.tar.gz | |
nfc: fix memory leak in llcp_sock_connect()
commit 7574fcdbdcb335763b6b322f6928dc0fd5730451 upstream.
In llcp_sock_connect(), use kmemdup to allocate memory for
"llcp_sock->service_name". The memory is not released in the sock_unlink
label of the subsequent failure branch.
As a result, memory leakage occurs.
fix CVE-2020-25672
Fixes: d646960f7986 ("NFC: Initial LLCP support")
Reported-by: "kiyin(尹亮)" <kiyin@tencent.com>
Link: https://www.openwall.com/lists/oss-security/2020/11/01/1
Cc: <stable@vger.kernel.org> #v3.3
Signed-off-by: Xiaoming Ni <nixiaoming@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/nfc')
| -rw-r--r-- | net/nfc/llcp_sock.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/net/nfc/llcp_sock.c b/net/nfc/llcp_sock.c index 050f80d524f8..413544ebe8ef 100644 --- a/net/nfc/llcp_sock.c +++ b/net/nfc/llcp_sock.c @@ -758,6 +758,8 @@ sock_unlink: nfc_llcp_local_put(llcp_sock->local); nfc_llcp_sock_unlink(&local->connecting_sockets, sk); + kfree(llcp_sock->service_name); + llcp_sock->service_name = NULL; put_dev: nfc_put_device(dev); |