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| author | Xiaoming Ni <nixiaoming@huawei.com> | 2021-03-25 11:51:12 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-16 11:59:06 +0200 |
| commit | 83a09c10719661d8b51f1aa475ec52c13f3546d1 (patch) | |
| tree | e3874ab0a0c779e3ff8057f14853f633bf1c0527 | |
| parent | 013b8099064f2dc51e789e54a93edb65e2539792 (diff) | |
| download | linux-stable-83a09c10719661d8b51f1aa475ec52c13f3546d1.tar.gz linux-stable-83a09c10719661d8b51f1aa475ec52c13f3546d1.tar.bz2 linux-stable-83a09c10719661d8b51f1aa475ec52c13f3546d1.zip | |
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>
| -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 724ba62e5fd2..a097de797ee7 100644 --- a/net/nfc/llcp_sock.c +++ b/net/nfc/llcp_sock.c @@ -757,6 +757,8 @@ 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); |