@@ -1712,13 +1712,12 @@ int tls_sw_recvmsg(struct sock *sk,
copied = err;
}
- len = len - copied;
- if (len) {
- target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
- timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
- } else {
+ if (len <= copied)
goto recv_end;
- }
+
+ target = sock_rcvlowat(sk, flags & MSG_WAITALL, len);
+ len = len - copied;
+ timeo = sock_rcvtimeo(sk, flags & MSG_DONTWAIT);
do {
bool retain_skb = false;
@@ -1853,7 +1852,7 @@ int tls_sw_recvmsg(struct sock *sk,
}
/* If we have a new message from strparser, continue now. */
- if (decrypted >= target && !ctx->recv_pkt)
+ if (decrypted + copied >= target && !ctx->recv_pkt)
break;
} while (len);
If some of the data came from the previous record, i.e. from the rx_list it had already been decrypted, so it's not counted towards the "decrypted" variable, but the "copied" variable. Take that into account when checking lowat. When calculating lowat target we need to pass the original len. E.g. if lowat is at 80, len is 100 and we had 30 bytes on rx_list target would currently be incorrectly calculated as 70, even though we only need 50 more bytes to make up the 80. Fixes: 692d7b5d1f91 ("tls: Fix recvmsg() to be able to peek across multiple records") Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com> Tested-by: David Beckett <david.beckett@netronome.com> --- net/tls/tls_sw.c | 13 ++++++------- 1 file changed, 6 insertions(+), 7 deletions(-)