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-rw-r--r--changes/bug150836
-rw-r--r--src/or/buffers.c2
2 files changed, 7 insertions, 1 deletions
diff --git a/changes/bug15083 b/changes/bug15083
new file mode 100644
index 0000000000..98d1d0e535
--- /dev/null
+++ b/changes/bug15083
@@ -0,0 +1,6 @@
+ o Major bugfixes (relay, stability):
+ - Fix a bug that could lead to a relay crashing with an assertion
+ failure if a buffer of exactly the wrong layout was passed
+ to buf_pullup() at exactly the wrong time. Fixes bug 15083;
+ bugfix on 0.2.0.10-alpha. Patch from 'cypherpunks'.
+
diff --git a/src/or/buffers.c b/src/or/buffers.c
index 9be0476f64..7976432793 100644
--- a/src/or/buffers.c
+++ b/src/or/buffers.c
@@ -426,7 +426,7 @@ buf_pullup(buf_t *buf, size_t bytes, int nulterminate)
size_t n = bytes - dest->datalen;
src = dest->next;
tor_assert(src);
- if (n > src->datalen) {
+ if (n >= src->datalen) {
memcpy(CHUNK_WRITE_PTR(dest), src->data, src->datalen);
dest->datalen += src->datalen;
dest->next = src->next;