From: Masami Hiramatsu (Google) Date: Sat, 16 Aug 2025 14:10:51 +0000 (+0900) Subject: tracing: fprobe-event: Sanitize wildcard for fprobe event name X-Git-Tag: v6.16.4~422 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=918974a4bd807da05b4678a7eaaa84ffd87a3f2a;p=thirdparty%2Fkernel%2Fstable.git tracing: fprobe-event: Sanitize wildcard for fprobe event name commit ec879e1a0be8007aa232ffedcf6a6445dfc1a3d7 upstream. 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 Signed-off-by: Greg Kroah-Hartman --- diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index bd084953a98be..f24affa252bc3 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 = '_'; }