From: David Marchand <david.marchand@redhat.com>
Date: Wed, 28 Oct 2020 21:02:48 +0000 (+0100)
Subject: trace: fix metadata dump
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=fd43b50113a84608a690acdeeb7fdd8c38be48b8;p=dpdk.git

trace: fix metadata dump

The ctf metadata is written to the metadata file without any check for
length, so this string must be null terminated.

Fixes: f1a099f5b1f1 ("trace: create CTF TDSL metadata in memory")

Signed-off-by: David Marchand <david.marchand@redhat.com>
Acked-by: Sunil Kumar Kori <skori@mavell.com>
---

diff --git a/lib/librte_eal/common/eal_common_trace_ctf.c b/lib/librte_eal/common/eal_common_trace_ctf.c
index ac1f64d04b..22615c4e73 100644
--- a/lib/librte_eal/common/eal_common_trace_ctf.c
+++ b/lib/librte_eal/common/eal_common_trace_ctf.c
@@ -37,11 +37,12 @@ meta_copy(char **meta, int *offset, char *str, int rc)
 	if (rc < 0)
 		return rc;
 
-	ptr = realloc(ptr, count + rc);
+	ptr = realloc(ptr, count + rc + 1);
 	if (ptr == NULL)
 		goto free_str;
 
 	memcpy(RTE_PTR_ADD(ptr, count), str, rc);
+	ptr[count + rc] = '\0';
 	count += rc;
 	free(str);