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

From: sunliming
Date: Wed Jun 07 2023 - 21:16:20 EST


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 -EFAULT when events are disabled.

Signed-off-by: sunliming <sunliming@xxxxxxxxxx>
---
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..970bac0503fd 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 -EFAULT;

return ret;
}
--
2.25.1