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-rw-r--r--source3/smbd/smb2_server.c21
1 files changed, 15 insertions, 6 deletions
diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c
index 288cc79b54..e40c594428 100644
--- a/source3/smbd/smb2_server.c
+++ b/source3/smbd/smb2_server.c
@@ -444,17 +444,26 @@ static void smb2_set_operation_credit(struct smbd_server_connection *sconn,
const struct iovec *in_vector,
struct iovec *out_vector)
{
+ const uint8_t *inhdr = (const uint8_t *)in_vector->iov_base;
uint8_t *outhdr = (uint8_t *)out_vector->iov_base;
- uint16_t credits_requested = 0;
+ uint16_t credits_requested;
+ uint32_t out_flags;
uint16_t credits_granted = 0;
- if (in_vector != NULL) {
- const uint8_t *inhdr = (const uint8_t *)in_vector->iov_base;
- credits_requested = SVAL(inhdr, SMB2_HDR_CREDIT);
- }
+ credits_requested = SVAL(inhdr, SMB2_HDR_CREDIT);
+ out_flags = IVAL(outhdr, SMB2_HDR_FLAGS);
SMB_ASSERT(sconn->smb2.max_credits >= sconn->smb2.credits_granted);
+ if (out_flags & SMB2_HDR_FLAG_ASYNC) {
+ /*
+ * In case we already send an async interim
+ * response, we should not grant
+ * credits on the final response.
+ */
+ credits_requested = 0;
+ }
+
if (credits_requested) {
uint16_t modified_credits_requested;
uint32_t multiplier;
@@ -1748,7 +1757,7 @@ static NTSTATUS smbd_smb2_request_reply(struct smbd_smb2_request *req)
/* Set credit for this operation (zero credits if this
is a final reply for an async operation). */
smb2_set_operation_credit(req->sconn,
- req->async ? NULL : &req->in.vector[i],
+ &req->in.vector[i],
&req->out.vector[i]);
if (req->do_signing) {