From: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Date: Wed, 10 Jun 2020 17:02:29 +0000 (-0400)
Subject: common: set dynamic-buffer's data to NULL on reset()
X-Git-Tag: v2.13.0-rc1~620
X-Git-Url: https://git.lttng.org./?a=commitdiff_plain;h=427d84693052f551da11a175d9a0f74bb6e169b3;p=lttng-tools.git

common: set dynamic-buffer's data to NULL on reset()

Set 'data' to NULL after the reset of a dynamic_buffer since
re-using it (e.g. appending) will cause realloc to be called
with an invalid pointer.

Not marked as a fix as no code currently re-uses a buffer after
a reset().

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: I58fd5bbcfcda9d952748bea17430e2f41b076f3c
---

diff --git a/src/common/dynamic-buffer.c b/src/common/dynamic-buffer.c
index 26d318dcd..4e87c58ac 100644
--- a/src/common/dynamic-buffer.c
+++ b/src/common/dynamic-buffer.c
@@ -186,6 +186,7 @@ void lttng_dynamic_buffer_reset(struct lttng_dynamic_buffer *buffer)
 	buffer->size = 0;
 	buffer->_capacity = 0;
 	free(buffer->data);
+	buffer->data = NULL;
 }
 
 LTTNG_HIDDEN