On Tue, 24 Mar 2026 09:47:08 +0100 Martin Kaiser <[email protected]> wrote:
> If fprobe_entry does not fill the allocated fgraph_data completely, the > unused part does not have to be zeroed. > > fgraph_data is a short-lived part of the shadow stack. The preceding > length field allows locating the end regardless of the content. > > Signed-off-by: Martin Kaiser <[email protected]> OK, thanks for update. Let me pick it. Thanks, > --- > v2: > - remove the memset instead of fixing the length > > kernel/trace/fprobe.c | 2 -- > 1 file changed, 2 deletions(-) > > diff --git a/kernel/trace/fprobe.c b/kernel/trace/fprobe.c > index dcadf1d23b8a..56d145017902 100644 > --- a/kernel/trace/fprobe.c > +++ b/kernel/trace/fprobe.c > @@ -450,8 +450,6 @@ static int fprobe_fgraph_entry(struct ftrace_graph_ent > *trace, struct fgraph_ops > used += FPROBE_HEADER_SIZE_IN_LONG + size_words; > } > } > - if (used < reserved_words) > - memset(fgraph_data + used, 0, reserved_words - used); > > /* If any exit_handler is set, data must be used. */ > return used != 0; > -- > 2.43.7 > -- Masami Hiramatsu (Google) <[email protected]>
