From ec879e1a0be8007aa232ffedcf6a6445dfc1a3d7 Mon Sep 17 00:00:00 2001 From: "Masami Hiramatsu (Google)" Date: Sat, 16 Aug 2025 23:10:51 +0900 Subject: [PATCH] tracing: fprobe-event: Sanitize wildcard for fprobe event name Fprobe event accepts wildcards for the target functions, but unless user specifies its event name, it makes an event with the wildcards. /sys/kernel/tracing # echo 'f mutex*' >> dynamic_events /sys/kernel/tracing # cat dynamic_events f:fprobes/mutex*__entry mutex* /sys/kernel/tracing # ls events/fprobes/ enable filter mutex*__entry To fix this, replace the wildcard ('*') with an underscore. Link: https://lore.kernel.org/all/175535345114.282990.12294108192847938710.stgit@devnote2/ Fixes: 334e5519c375 ("tracing/probes: Add fprobe events for tracing function entry and exit.") Signed-off-by: Masami Hiramatsu (Google) Cc: stable@vger.kernel.org --- kernel/trace/trace.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 1dbf1d3cf2f1..5a6688832da8 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -2204,7 +2204,7 @@ static inline bool is_good_system_name(const char *name) static inline void sanitize_event_name(char *name) { while (*name++ != '\0') - if (*name == ':' || *name == '.') + if (*name == ':' || *name == '.' || *name == '*') *name = '_'; } -- 2.25.1