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authorJakub Kicinski <jakub.kicinski@netronome.com>2019-04-20 01:52:19 +0200
committerDavid S. Miller <davem@davemloft.net>2019-04-21 05:36:51 +0200
commit12c7686111326148b4b5db189130522a4ad1be4a (patch)
treee7eb8437b2d9d6f8b592019a768c27815e697cfd /net/tls
parentnet/tls: avoid potential deadlock in tls_set_device_offload_rx() (diff)
downloadlinux-12c7686111326148b4b5db189130522a4ad1be4a.tar.xz
linux-12c7686111326148b4b5db189130522a4ad1be4a.zip
net/tls: don't leak IV and record seq when offload fails
When device refuses the offload in tls_set_device_offload_rx() it calls tls_sw_free_resources_rx() to clean up software context state. Unfortunately, tls_sw_free_resources_rx() does not free all the state tls_set_sw_offload() allocated - it leaks IV and sequence number buffers. All other code paths which lead to tls_sw_release_resources_rx() (which tls_sw_free_resources_rx() calls) free those right before the call. Avoid the leak by moving freeing of iv and rec_seq into tls_sw_release_resources_rx(). Fixes: 4799ac81e52a ("tls: Add rx inline crypto offload") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tls')
-rw-r--r--net/tls/tls_device.c2
-rw-r--r--net/tls/tls_main.c5
-rw-r--r--net/tls/tls_sw.c3
3 files changed, 4 insertions, 6 deletions
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 1b5f55cac613..cc0256939eb6 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -941,8 +941,6 @@ void tls_device_offload_cleanup_rx(struct sock *sk)
}
out:
up_read(&device_offload_lock);
- kfree(tls_ctx->rx.rec_seq);
- kfree(tls_ctx->rx.iv);
tls_sw_release_resources_rx(sk);
}
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index 9547cea0ce3b..478603f43964 100644
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -293,11 +293,8 @@ static void tls_sk_proto_close(struct sock *sk, long timeout)
#endif
}
- if (ctx->rx_conf == TLS_SW) {
- kfree(ctx->rx.rec_seq);
- kfree(ctx->rx.iv);
+ if (ctx->rx_conf == TLS_SW)
tls_sw_free_resources_rx(sk);
- }
#ifdef CONFIG_TLS_DEVICE
if (ctx->rx_conf == TLS_HW)
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index b50ced862f6f..29d6af43dd24 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -2078,6 +2078,9 @@ void tls_sw_release_resources_rx(struct sock *sk)
struct tls_context *tls_ctx = tls_get_ctx(sk);
struct tls_sw_context_rx *ctx = tls_sw_ctx_rx(tls_ctx);
+ kfree(tls_ctx->rx.rec_seq);
+ kfree(tls_ctx->rx.iv);
+
if (ctx->aead_recv) {
kfree_skb(ctx->recv_pkt);
ctx->recv_pkt = NULL;