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ch_ktls: Correction in trimmed_len calculation

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trimmed length calculation goes wrong if skb has only tag part
to send. It should be zero if there is no data bytes apart from
TAG.

Fixes: dc05f3df8f ("chcr: Handle first or middle part of record")
Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Rohit Maheshwari 2020-11-09 16:21:35 +05:30 committed by Jakub Kicinski
parent 687823d2d1
commit c68a28a9e2
1 changed files with 7 additions and 4 deletions
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11
drivers/net/ethernet/chelsio/inline_crypto/ch_ktls/chcr_ktls.c
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@ -1729,10 +1729,13 @@ static int chcr_short_record_handler(struct chcr_ktls_info *tx_info,
if (remaining_record > 0 &&
remaining_record < TLS_CIPHER_AES_GCM_128_TAG_SIZE) {
int trimmed_len = data_len -
(TLS_CIPHER_AES_GCM_128_TAG_SIZE - remaining_record);
/* don't process the pkt if it is only a partial tag */
if (data_len < TLS_CIPHER_AES_GCM_128_TAG_SIZE)
int trimmed_len = 0;
if (tls_end_offset > TLS_CIPHER_AES_GCM_128_TAG_SIZE)
trimmed_len = data_len -
(TLS_CIPHER_AES_GCM_128_TAG_SIZE -
remaining_record);
if (!trimmed_len)
goto out;
WARN_ON(trimmed_len > data_len);