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-rw-r--r--net/tipc/msg.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/net/tipc/msg.c b/net/tipc/msg.c
index 6ec958401f78..ce6d929d66d2 100644
--- a/net/tipc/msg.c
+++ b/net/tipc/msg.c
@@ -96,9 +96,11 @@ int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect,
}
/* tipc_buf_append(): Append a buffer to the fragment list of another buffer
- * Let first buffer become head buffer
- * Returns 1 and sets *buf to headbuf if chain is complete, otherwise 0
- * Leaves headbuf pointer at NULL if failure
+ * @*headbuf: in: NULL for first frag, otherwise value returned from prev call
+ * out: set when successful non-complete reassembly, otherwise NULL
+ * @*buf: in: the buffer to append. Always defined
+ * out: head buf after sucessful complete reassembly, otherwise NULL
+ * Returns 1 when reassembly complete, otherwise 0
*/
int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf)
{
@@ -117,6 +119,7 @@ int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf)
goto out_free;
head = *headbuf = frag;
skb_frag_list_init(head);
+ *buf = NULL;
return 0;
}
if (!head)
@@ -145,6 +148,8 @@ int tipc_buf_append(struct sk_buff **headbuf, struct sk_buff **buf)
out_free:
pr_warn_ratelimited("Unable to build fragment list\n");
kfree_skb(*buf);
+ kfree_skb(*headbuf);
+ *buf = *headbuf = NULL;
return 0;
}