diff options
| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2024-03-14 16:49:10 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-04-03 15:11:30 +0200 |
| commit | 93bcc1752c69bb309f4d8cfaf960ef1faeb34996 (patch) | |
| tree | 5fc067b2d070121dae79bfa165a3ce95f7858d30 | |
| parent | 7bedfe4cfa38771840a355970e4437cd52d4046b (diff) | |
| download | linux-stable-93bcc1752c69bb309f4d8cfaf960ef1faeb34996.tar.gz linux-stable-93bcc1752c69bb309f4d8cfaf960ef1faeb34996.tar.bz2 linux-stable-93bcc1752c69bb309f4d8cfaf960ef1faeb34996.zip | |
wireguard: netlink: access device through ctx instead of peer
[ Upstream commit 71cbd32e3db82ea4a74e3ef9aeeaa6971969c86f ]
The previous commit fixed a bug that led to a NULL peer->device being
dereferenced. It's actually easier and faster performance-wise to
instead get the device from ctx->wg. This semantically makes more sense
too, since ctx->wg->peer_allowedips.seq is compared with
ctx->allowedips_seq, basing them both in ctx. This also acts as a
defence in depth provision against freed peers.
Cc: stable@vger.kernel.org
Fixes: e7096c131e51 ("net: WireGuard secure network tunnel")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/wireguard/netlink.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/wireguard/netlink.c b/drivers/net/wireguard/netlink.c index c17aee454fa3..f7055180ba4a 100644 --- a/drivers/net/wireguard/netlink.c +++ b/drivers/net/wireguard/netlink.c @@ -164,8 +164,8 @@ get_peer(struct wg_peer *peer, struct sk_buff *skb, struct dump_ctx *ctx) if (!allowedips_node) goto no_allowedips; if (!ctx->allowedips_seq) - ctx->allowedips_seq = peer->device->peer_allowedips.seq; - else if (ctx->allowedips_seq != peer->device->peer_allowedips.seq) + ctx->allowedips_seq = ctx->wg->peer_allowedips.seq; + else if (ctx->allowedips_seq != ctx->wg->peer_allowedips.seq) goto no_allowedips; allowedips_nest = nla_nest_start(skb, WGPEER_A_ALLOWEDIPS); |