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Message-ID: <20241031120139.1343025-1-ruanjinjie@huawei.com>
Date: Thu, 31 Oct 2024 20:01:39 +0800
From: Jinjie Ruan <ruanjinjie@...wei.com>
To: <rostedt@...dmis.org>, <mhiramat@...nel.org>,
<mathieu.desnoyers@...icios.com>, <linux-kernel@...r.kernel.org>,
<linux-trace-kernel@...r.kernel.org>
CC: <ruanjinjie@...wei.com>
Subject: [PATCH v2] tracing: Replace strncpy() with strscpy() when copying comm
Replace the depreciated[1] strncpy() calls with strscpy()
when copying comm.
Link: https://github.com/KSPP/linux/issues/90 [1]
Signed-off-by: Jinjie Ruan <ruanjinjie@...wei.com>
---
v2:
- Fix the trace_events_hist.c build problem.
---
kernel/trace/trace.c | 2 +-
kernel/trace/trace_events_hist.c | 4 ++--
kernel/trace/trace_sched_switch.c | 2 +-
3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index a8f52b6527ca..cb2c66554212 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -1934,7 +1934,7 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
max_data->critical_start = data->critical_start;
max_data->critical_end = data->critical_end;
- strncpy(max_data->comm, tsk->comm, TASK_COMM_LEN);
+ strscpy(max_data->comm, tsk->comm);
max_data->pid = tsk->pid;
/*
* If tsk == current, then use current_uid(), as that does not use
diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c
index 5f9119eb7c67..8e370bc4faa4 100644
--- a/kernel/trace/trace_events_hist.c
+++ b/kernel/trace/trace_events_hist.c
@@ -1599,7 +1599,7 @@ static inline void save_comm(char *comm, struct task_struct *task)
return;
}
- strncpy(comm, task->comm, TASK_COMM_LEN);
+ strscpy(comm, task->comm, TASK_COMM_LEN);
}
static void hist_elt_data_free(struct hist_elt_data *elt_data)
@@ -3405,7 +3405,7 @@ static bool cond_snapshot_update(struct trace_array *tr, void *cond_data)
elt_data = context->elt->private_data;
track_elt_data = track_data->elt.private_data;
if (elt_data->comm)
- strncpy(track_elt_data->comm, elt_data->comm, TASK_COMM_LEN);
+ strscpy(track_elt_data->comm, elt_data->comm, TASK_COMM_LEN);
track_data->updated = true;
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 8a407adb0e1c..573b5d8e8a28 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -187,7 +187,7 @@ static inline char *get_saved_cmdlines(int idx)
static inline void set_cmdline(int idx, const char *cmdline)
{
- strncpy(get_saved_cmdlines(idx), cmdline, TASK_COMM_LEN);
+ strscpy(get_saved_cmdlines(idx), cmdline, TASK_COMM_LEN);
}
static void free_saved_cmdlines_buffer(struct saved_cmdlines_buffer *s)
--
2.34.1
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