linux-kernel - [PATCH v1] kernel/trace/trace: check the return value of tracing_update

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Date:   Fri, 16 Sep 2022 19:03:53 -0700
From:   Li Zhong <floridsleeves@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     mingo@...hat.com, rostedt@...dmis.org,
        Li Zhong <floridsleeves@...il.com>
Subject: [PATCH v1] kernel/trace/trace: check the return value of tracing_update_buffers()

Check the return value of tracing_update_buffers() in case it fails.

Signed-off-by: Li Zhong <floridsleeves@...il.com>
---
 kernel/trace/trace.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index d3005279165d..0e367e326147 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -3305,7 +3305,8 @@ void trace_printk_init_buffers(void)
 	pr_warn("**********************************************************\n");
 
 	/* Expand the buffers to set size */
-	tracing_update_buffers();
+	if (tracing_update_buffers() < 0)
+		return;
 
 	buffers_allocated = 1;
 
-- 
2.25.1