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author | Wang Hai <wanghai38@huawei.com> | 2022-03-29 21:31:26 -0400 |
---|---|---|
committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2022-04-06 17:59:56 +0200 |
commit | fa32671b99404c53946deb45a3c3062c353a706c (patch) | |
tree | 066da0971984d3a0e7dc83057d435ca0535aa18b | |
parent | qemu: simplify RNG seeding (diff) | |
download | wireguard-linux-compat-fa32671b99404c53946deb45a3c3062c353a706c.tar.xz wireguard-linux-compat-fa32671b99404c53946deb45a3c3062c353a706c.zip |
socket: free skb in send6 when ipv6 is disabled
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>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
-rw-r--r-- | src/socket.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/socket.c b/src/socket.c index bd887f3..db0d61e 100644 --- a/src/socket.c +++ b/src/socket.c @@ -160,6 +160,7 @@ out: rcu_read_unlock_bh(); return ret; #else + kfree_skb(skb); return -EAFNOSUPPORT; #endif } |