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| author | Xiyu Yang <xiyuyang19@fudan.edu.cn> | 2021-09-09 12:32:00 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-09-22 12:26:41 +0200 |
| commit | efe35db94897613438168b3e9cc3aaa3dcd6bedd (patch) | |
| tree | fb3f81b6799affb22b5fa93e9a90a4ad7ebf9cee /net/unix/af_unix.c | |
| parent | 5ab04a4ffed02f66e8e6310ba8261a43d1572343 (diff) | |
net/l2tp: Fix reference count leak in l2tp_udp_recv_core
commit 9b6ff7eb666415e1558f1ba8a742f5db6a9954de upstream.
The reference count leak issue may take place in an error handling
path. If both conditions of tunnel->version == L2TP_HDR_VER_3 and the
return value of l2tp_v3_ensure_opt_in_linear is nonzero, the function
would directly jump to label invalid, without decrementing the reference
count of the l2tp_session object session increased earlier by
l2tp_tunnel_get_session(). This may result in refcount leaks.
Fix this issue by decrease the reference count before jumping to the
label invalid.
Fixes: 4522a70db7aa ("l2tp: fix reading optional fields of L2TPv3")
Signed-off-by: Xiyu Yang <xiyuyang19@fudan.edu.cn>
Signed-off-by: Xin Xiong <xiongx18@fudan.edu.cn>
Signed-off-by: Xin Tan <tanxin.ctf@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/unix/af_unix.c')
0 files changed, 0 insertions, 0 deletions