David reports that tls triggers warnings related to
sk->sk_forward_alloc not being zero at destruction time:
WARNING: CPU: 5 PID: 6831 at net/core/stream.c:206
sk_stream_kill_queues+0x103/0x110
WARNING: CPU: 5 PID: 6831 at net/ipv4/af_inet.c:160
inet_sock_destruct+0x15b/0x170
When sender fills up the write buffer and dies from
SIGPIPE. This is due to the device implementation
not cleaning up the partially_sent_record.
This is because commit a42055e8d2c3 ("net/tls: Add support for async encryption
of records for performance")
moved the partial record cleanup to the SW-only path.
Fixes: a42055e8d2c3 ("net/tls: Add support for async encryption of records for
performance")
Reported-by: David Beckett <david.beck...@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vanderme...@netronome.com>
Reviewed-by: Simon Horman <simon.hor...@netronome.com>
---
include/net/tls.h | 2 ++
net/tls/tls_device.c | 7 +++++++
net/tls/tls_main.c | 22 ++++++++++++++++++++++
net/tls/tls_sw.c | 15 +--------------
4 files changed, 32 insertions(+), 14 deletions(-)
diff --git a/include/net/tls.h b/include/net/tls.h
index cefc020ffeb4..5934246b2c6f 100644
--- a/include/net/tls.h
+++ b/include/net/tls.h
@@ -307,6 +307,7 @@ int tls_device_sendmsg(struct sock *sk, struct msghdr *msg,
size_t size);
int tls_device_sendpage(struct sock *sk, struct page *page,
int offset, size_t size, int flags);
void tls_device_sk_destruct(struct sock *sk);
+void tls_device_free_resources_tx(struct sock *sk);
void tls_device_init(void);
void tls_device_cleanup(void);
int tls_tx_records(struct sock *sk, int flags);
@@ -330,6 +331,7 @@ int tls_push_sg(struct sock *sk, struct tls_context *ctx,
int flags);
int tls_push_partial_record(struct sock *sk, struct tls_context *ctx,
int flags);
+bool tls_free_partial_record(struct sock *sk, struct tls_context *ctx);
static inline struct tls_msg *tls_msg(struct sk_buff *skb)
{
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c
index 38b3b2a9835a..9f3bdbc1e593 100644
--- a/net/tls/tls_device.c
+++ b/net/tls/tls_device.c
@@ -219,6 +219,13 @@ void tls_device_sk_destruct(struct sock *sk)
}
EXPORT_SYMBOL(tls_device_sk_destruct);
+void tls_device_free_resources_tx(struct sock *sk)
+{
+ struct tls_context *tls_ctx = tls_get_ctx(sk);
+
+ tls_free_partial_record(sk, tls_ctx);
+}
+
static void tls_append_frag(struct tls_record_info *record,
struct page_frag *pfrag,
int size)
diff --git a/net/tls/tls_main.c b/net/tls/tls_main.c
index df921a2904b9..a3cca1ef0098 100644
--- a/net/tls/tls_main.c
+++ b/net/tls/tls_main.c
@@ -208,6 +208,26 @@ int tls_push_partial_record(struct sock *sk, struct
tls_context *ctx,
return tls_push_sg(sk, ctx, sg, offset, flags);
}
+bool tls_free_partial_record(struct sock *sk, struct tls_context *ctx)
+{
+ struct scatterlist *sg;
+
+ sg = ctx->partially_sent_record;
+ if (!sg)
+ return false;
+
+ while (1) {
+ put_page(sg_page(sg));
+ sk_mem_uncharge(sk, sg->length);
+
+ if (sg_is_last(sg))
+ break;
+ sg++;
+ }
+ ctx->partially_sent_record = NULL;
+ return true;
+}
+
static void tls_write_space(struct sock *sk)
{
struct tls_context *ctx = tls_get_ctx(sk);
@@ -267,6 +287,8 @@ static void tls_sk_proto_close(struct sock *sk, long
timeout)
kfree(ctx->tx.rec_seq);
kfree(ctx->tx.iv);
tls_sw_free_resources_tx(sk);
+ } else if (ctx->tx_conf == TLS_HW) {
+ tls_device_free_resources_tx(sk);
}
if (ctx->rx_conf == TLS_SW) {
diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c
index 20b191227969..b50ced862f6f 100644
--- a/net/tls/tls_sw.c
+++ b/net/tls/tls_sw.c
@@ -2052,20 +2052,7 @@ void tls_sw_free_resources_tx(struct sock *sk)
/* Free up un-sent records in tx_list. First, free
* the partially sent record if any at head of tx_list.
*/
- if (tls_ctx->partially_sent_record) {
- struct scatterlist *sg = tls_ctx->partially_sent_record;
-
- while (1) {
- put_page(sg_page(sg));
- sk_mem_uncharge(sk, sg->length);
-
- if (sg_is_last(sg))
- break;
- sg++;
- }
-
- tls_ctx->partially_sent_record = NULL;
-
+ if (tls_free_partial_record(sk, tls_ctx)) {
rec = list_first_entry(&ctx->tx_list,
struct tls_rec, list);
list_del(&rec->list);
--
2.21.0
