diff options
| author | Martin Kaiser <martin@kaiser.cx> | 2026-03-25 00:47:01 +0900 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2026-03-25 00:47:01 +0900 |
| commit | e0a384434ae1bdfb03954c46c464e3dbd3223ad6 (patch) | |
| tree | 33d09f521d05360e5f6fe57516e358f67c600eb5 /kernel/trace/fprobe.c | |
| parent | c369299895a591d96745d6492d4888259b004a9e (diff) | |
tracing: fprobe: do not zero out unused fgraph_data
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.
Link: https://lore.kernel.org/all/20260324084804.375764-1-martin@kaiser.cx/
Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Diffstat (limited to 'kernel/trace/fprobe.c')
| -rw-r--r-- | kernel/trace/fprobe.c | 2 |
1 files changed, 0 insertions, 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; |