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net/tls: don't leak partially sent record in device mode

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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 a42055e8d2 ("net/tls: Add support for async encryption of records for performance")
moved the partial record cleanup to the SW-only path.

Fixes: a42055e8d2 ("net/tls: Add support for async encryption of records for performance")
Reported-by: David Beckett <david.beckett@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2019-04-10 11:04:31 -07:00 • committed by David S. Miller
parent 5a03bc73ab
commit 35b71a34ad
4 changed files with 32 additions and 14 deletions
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7
net/tls/tls_device.c
View file

@ -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)