| Message ID | 20241031120139.1343025-1-ruanjinjie@huawei.com (mailing list archive) |
|---|---|
| State | Queued |
| Headers | show |
| Series | [v2] tracing: Replace strncpy() with strscpy() when copying comm | expand |
On 2024-10-31 08:01, Jinjie Ruan wrote: > 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@huawei.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); make allyesconfig + make please ? Thanks, Mathieu
On Thu, 31 Oct 2024 11:12:06 -0400 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> wrote: > > --- 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); > > make allyesconfig + make please ? Or at a minimum, make sure all the code you change is compiled. -- Steve
On 2024/10/31 23:48, Steven Rostedt wrote: > On Thu, 31 Oct 2024 11:12:06 -0400 > Mathieu Desnoyers <mathieu.desnoyers@efficios.com> wrote: > >>> --- 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); >> >> make allyesconfig + make please ? > > Or at a minimum, make sure all the code you change is compiled. Sure, x86 and arm64 allmodconfig is ok Thank you! > > -- Steve
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)
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@huawei.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(-)