X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fcommon%2Fkernel-consumer%2Fkernel-consumer.c;h=d5418dcdabb0217873baf94dc11c15c8af96566d;hb=9c2bd8db1c70269d37537b7d02bae41ccab29056;hp=bb5ba3b1334ec9883c8d0def28d85d81fb0cbcd5;hpb=1b47ae5812ca04726890048e7ec9ce4186e4d590;p=lttng-tools.git

diff --git a/src/common/kernel-consumer/kernel-consumer.c b/src/common/kernel-consumer/kernel-consumer.c
index bb5ba3b13..d5418dcda 100644
--- a/src/common/kernel-consumer/kernel-consumer.c
+++ b/src/common/kernel-consumer/kernel-consumer.c
@@ -1315,12 +1315,34 @@ ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
 		}
 		ret = update_stream_stats(stream);
 		if (ret < 0) {
+			err = kernctl_put_subbuf(infd);
+			if (err != 0) {
+				if (err == -EFAULT) {
+					PERROR("Error in unreserving sub buffer\n");
+				} else if (err == -EIO) {
+					/* Should never happen with newer LTTng versions */
+					PERROR("Reader has been pushed by the writer, last sub-buffer corrupted.");
+				}
+				ret = err;
+				goto end;
+			}
 			goto end;
 		}
 	} else {
 		write_index = 0;
 		ret = metadata_stream_check_version(infd, stream);
 		if (ret < 0) {
+			err = kernctl_put_subbuf(infd);
+			if (err != 0) {
+				if (err == -EFAULT) {
+					PERROR("Error in unreserving sub buffer\n");
+				} else if (err == -EIO) {
+					/* Should never happen with newer LTTng versions */
+					PERROR("Reader has been pushed by the writer, last sub-buffer corrupted.");
+				}
+				ret = err;
+				goto end;
+			}
 			goto end;
 		}
 	}