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| author | Jakub Kicinski <jakub.kicinski@netronome.com> | 2019-11-27 23:16:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-05 00:34:25 +0300 |
| commit | 33627d93d75702c70c898441602dbfba03e0f4cc (patch) | |
| tree | 1be8adc0094075ea1907e0a3db8f28e057123483 | |
| parent | 7d9da049e68e253e9c0419a7effab878108aa59b (diff) | |
| download | linux-33627d93d75702c70c898441602dbfba03e0f4cc.tar.xz | |
net/tls: use sg_next() to walk sg entries
[ Upstream commit c5daa6cccdc2f94aca2c9b3fa5f94e4469997293 ]
Partially sent record cleanup path increments an SG entry
directly instead of using sg_next(). This should not be a
problem today, as encrypted messages should be always
allocated as arrays. But given this is a cleanup path it's
easy to miss was this ever to change. Use sg_next(), and
simplify the code.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | include/net/tls.h | 2 | ||||
| -rw-r--r-- | net/tls/tls_main.c | 13 | ||||
| -rw-r--r-- | net/tls/tls_sw.c | 3 |
3 files changed, 5 insertions, 13 deletions
diff --git a/include/net/tls.h b/include/net/tls.h index 4e426c18645f..e46d4aa27ee7 100644 --- a/include/net/tls.h +++ b/include/net/tls.h @@ -407,7 +407,7 @@ 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); +void 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_main.c b/net/tls/tls_main.c index ac2dfe36022d..c7ecd053d4e7 100644 --- a/net/tls/tls_main.c +++ b/net/tls/tls_main.c @@ -208,24 +208,15 @@ 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) +void 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) { + for (sg = ctx->partially_sent_record; sg; sg = sg_next(sg)) { 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) diff --git a/net/tls/tls_sw.c b/net/tls/tls_sw.c index 0dda7d8ac4ef..45e993c4e8f6 100644 --- a/net/tls/tls_sw.c +++ b/net/tls/tls_sw.c @@ -2086,7 +2086,8 @@ void tls_sw_release_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_free_partial_record(sk, tls_ctx)) { + if (tls_ctx->partially_sent_record) { + tls_free_partial_record(sk, tls_ctx); rec = list_first_entry(&ctx->tx_list, struct tls_rec, list); list_del(&rec->list); |