From 856b414b638f61c09f57227eedc7ca891049fd19 Mon Sep 17 00:00:00 2001
From: =?utf8?q?J=C3=A9r=C3=A9mie=20Galarneau?=
 <jeremie.galarneau@efficios.com>
Date: Wed, 16 Mar 2022 11:56:21 -0400
Subject: [PATCH] Fix: event: erroneous bound check on perf counter name size
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The wrong size if used when initializing a perf counter name from a
payload. The destination size must be used to prevent out of bound
writes.

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Change-Id: I8ea41d30815bd2c02bb2ad8b01e8cecd2d6549a8
---
 src/common/event.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/common/event.c b/src/common/event.c
index f336875ae..484fde26f 100644
--- a/src/common/event.c
+++ b/src/common/event.c
@@ -1040,7 +1040,8 @@ static ssize_t lttng_event_context_perf_counter_populate_from_payload(
 			goto end;
 		}
 
-		ret = lttng_strncpy(event_ctx->u.perf_counter.name, name, name_len);
+		ret = lttng_strncpy(event_ctx->u.perf_counter.name, name,
+				sizeof(event_ctx->u.perf_counter.name));
 		if (ret) {
 			consumed = -1;
 			goto end;
-- 
2.34.1