diff options
| author | Wang Hai <wanghai38@huawei.com> | 2022-03-29 21:31:26 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 14:40:40 +0200 |
| commit | 096f9d35cac0a0c95ffafc00db84786b665a4837 (patch) | |
| tree | 7062f39a577659e30a3e7bf29e44c2e54ea70e67 /drivers/net/wireguard/socket.c | |
| parent | cd032f218c023d9f44b7a1c14752fce57023b21b (diff) | |
wireguard: socket: free skb in send6 when ipv6 is disabled
commit bbbf962d9460194993ee1943a793a0a0af4a7fbf upstream.
I got a memory leak report:
unreferenced object 0xffff8881191fc040 (size 232):
comm "kworker/u17:0", pid 23193, jiffies 4295238848 (age 3464.870s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff814c3ef4>] slab_post_alloc_hook+0x84/0x3b0
[<ffffffff814c8977>] kmem_cache_alloc_node+0x167/0x340
[<ffffffff832974fb>] __alloc_skb+0x1db/0x200
[<ffffffff82612b5d>] wg_socket_send_buffer_to_peer+0x3d/0xc0
[<ffffffff8260e94a>] wg_packet_send_handshake_initiation+0xfa/0x110
[<ffffffff8260ec81>] wg_packet_handshake_send_worker+0x21/0x30
[<ffffffff8119c558>] process_one_work+0x2e8/0x770
[<ffffffff8119ca2a>] worker_thread+0x4a/0x4b0
[<ffffffff811a88e0>] kthread+0x120/0x160
[<ffffffff8100242f>] ret_from_fork+0x1f/0x30
In function wg_socket_send_buffer_as_reply_to_skb() or wg_socket_send_
buffer_to_peer(), the semantics of send6() is required to free skb. But
when CONFIG_IPV6 is disable, kfree_skb() is missing. This patch adds it
to fix this bug.
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/wireguard/socket.c')
| -rw-r--r-- | drivers/net/wireguard/socket.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/wireguard/socket.c b/drivers/net/wireguard/socket.c index 52b9bc83abcbc..ac86e945836f9 100644 --- a/drivers/net/wireguard/socket.c +++ b/drivers/net/wireguard/socket.c @@ -160,6 +160,7 @@ out: rcu_read_unlock_bh(); return ret; #else + kfree_skb(skb); return -EAFNOSUPPORT; #endif } |