From: Masami Hiramatsu (Google) Date: Mon, 20 Jul 2026 10:12:38 +0000 (+0900) Subject: tracing/eprobe: Fix exact system name matching in eprobe_dyn_event_match() X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=f418d68d71fd4a0a9cef92377bc8c4c3334b5b53;p=thirdparty%2Fkernel%2Flinux.git tracing/eprobe: Fix exact system name matching in eprobe_dyn_event_match() eprobe_dyn_event_match() checks if the target event system in argv[0] matches ep->event_system using strncmp(ep->event_system, argv[0], len). However, if ep->event_system is longer than len (e.g. "eprobes" vs "ep/event"), strncmp() still returns 0 because the first len characters match. Check that ep->event_system[len] is '\0' to ensure exact system name matching. Link: https://lore.kernel.org/all/178454235856.290363.14872590900774231133.stgit@devnote2/ Fixes: 7d5fda1c841f ("tracing: Fix event probe removal from dynamic events") Cc: stable@vger.kernel.org Assisted-by: Antigravity:gemini-3.5-flash Signed-off-by: Masami Hiramatsu (Google) --- diff --git a/kernel/trace/trace_eprobe.c b/kernel/trace/trace_eprobe.c index 50518b071414..bcd97cb24ac9 100644 --- a/kernel/trace/trace_eprobe.c +++ b/kernel/trace/trace_eprobe.c @@ -172,7 +172,8 @@ static bool eprobe_dyn_event_match(const char *system, const char *event, if (!slash) return false; - if (strncmp(ep->event_system, argv[0], slash - argv[0])) + if (strncmp(ep->event_system, argv[0], slash - argv[0]) || + ep->event_system[slash - argv[0]] != '\0') return false; if (strcmp(ep->event_name, slash + 1)) return false;