[PATCH v4 1/3] libceph: fail the sparse-read if there still has data in socket

[xiubli@redhat.com]

From: Xiubo Li <xiubli@redhat.com>

Once this happens that means there have bugs.

URL: https://tracker.ceph.com/issues/63586
Signed-off-by: Xiubo Li <xiubli@redhat.com>
---
 net/ceph/osd_client.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 9be80d01c1dc..f8029b30a3fb 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -5912,6 +5912,13 @@ static int osd_sparse_read(struct ceph_connection *con,
 		fallthrough;
 	case CEPH_SPARSE_READ_DATA:
 		if (sr->sr_index >= count) {
+			if (sr->sr_datalen) {
+				pr_warn_ratelimited("sr_datalen %u sr_index %d count %u\n",
+						    sr->sr_datalen, sr->sr_index,
+						    count);
+				return -EREMOTEIO;
+			}
+
 			sr->sr_state = CEPH_SPARSE_READ_HDR;
 			goto next_op;
 		}
@@ -5919,6 +5926,8 @@ static int osd_sparse_read(struct ceph_connection *con,
 		eoff = sr->sr_extent[sr->sr_index].off;
 		elen = sr->sr_extent[sr->sr_index].len;
 
+		sr->sr_datalen -= elen;
+
 		dout("[%d] ext %d off 0x%llx len 0x%llx\n",
 		     o->o_osd, sr->sr_index, eoff, elen);
 
-- 
2.43.0