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| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2019-11-05 14:24:34 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-11-06 17:33:32 -0800 |
| commit | 02b1fa07bb58f5d1f349b5b09eb936739a7b20fc (patch) | |
| tree | 7cad23cdb54a207b0864e45218995ce047112e3c /net/tls/tls_device.c | |
| parent | 17fdd7638cb687cd7f15a48545f25d738f0101e0 (diff) | |
| download | lwn-02b1fa07bb58f5d1f349b5b09eb936739a7b20fc.tar.gz lwn-02b1fa07bb58f5d1f349b5b09eb936739a7b20fc.zip | |
net/tls: don't pay attention to sk_write_pending when pushing partial records
sk_write_pending being not zero does not guarantee that partial
record will be pushed. If the thread waiting for memory times out
the pending record may get stuck.
In case of tls_device there is no path where parial record is
set and writer present in the first place. Partial record is
set only in tls_push_sg() and tls_push_sg() will return an
error immediately. All tls_device callers of tls_push_sg()
will return (and not wait for memory) if it failed.
Fixes: a42055e8d2c3 ("net/tls: Add support for async encryption of records for performance")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tls/tls_device.c')
| -rw-r--r-- | net/tls/tls_device.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/tls/tls_device.c b/net/tls/tls_device.c index f959487c5cd1..5a3715ddc592 100644 --- a/net/tls/tls_device.c +++ b/net/tls/tls_device.c @@ -623,9 +623,11 @@ static int tls_device_push_pending_record(struct sock *sk, int flags) void tls_device_write_space(struct sock *sk, struct tls_context *ctx) { - if (!sk->sk_write_pending && tls_is_partially_sent_record(ctx)) { + if (tls_is_partially_sent_record(ctx)) { gfp_t sk_allocation = sk->sk_allocation; + WARN_ON_ONCE(sk->sk_write_pending); + sk->sk_allocation = GFP_ATOMIC; tls_push_partial_record(sk, ctx, MSG_DONTWAIT | MSG_NOSIGNAL | |