linux-kernel - [PATCH v2 1/3] tracing/user_events: Fix incorrect return value for writing operation when events are disabled

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20230609030302.1278716-2-sunliming@kylinos.cn>
Date:   Fri,  9 Jun 2023 11:03:00 +0800
From:   sunliming <sunliming@...inos.cn>
To:     mhiramat@...nel.org, beaub@...ux.microsoft.com,
        rostedt@...dmis.org, shuah@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-trace-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org, kelulanainsley@...il.com,
        sunliming <sunliming@...inos.cn>
Subject: [PATCH v2 1/3] tracing/user_events: Fix incorrect return value for writing operation when events are disabled

The writing operation return the count of writes whether events are
enabled or disabled. This is incorrect when events are disabled. Fix
this by just return -ENOENT when events are disabled.

Signed-off-by: sunliming <sunliming@...inos.cn>
---
 kernel/trace/trace_events_user.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/trace_events_user.c b/kernel/trace/trace_events_user.c
index 1ac5ba5685ed..92204bbe79da 100644
--- a/kernel/trace/trace_events_user.c
+++ b/kernel/trace/trace_events_user.c
@@ -1957,7 +1957,8 @@ static ssize_t user_events_write_core(struct file *file, struct iov_iter *i)
 
 		if (unlikely(faulted))
 			return -EFAULT;
-	}
+	} else
+		return -ENOENT;
 
 	return ret;
 }
-- 
2.25.1