From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 27D5D3DB97A; Mon, 20 Jul 2026 10:12:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784542372; cv=none; b=gZjzGoZATdQATgi+Afvv1liV5wuiRSAJwRMHDAjSby4i4331dlyd57o+Plpp6oMOhtZUtMxH4i1Xo9R0R0LwtIrDyZ6SmTbuImPkL7bt20kl5oWtFoW6WGEWrlLY521rQrE9v7hejvY2fYVINmFIm1VtuSXZP5FgiVRc2oXWtIs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784542372; c=relaxed/simple; bh=Pq9Aj2PpjMdyraoMOlDwZjHrqvrQlJ5+jJWqtZcvKo8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=Uxor6rYC94g/2/t3intSSqWbMLgmky0DNP22PekuXCn6iosJHrf0/aNLqUb7iH+TP1K30He/lcjMFhYZu1gzz+jjkKR7DuSbu5rLbJ8yfP/PfOaYvPGcNGVhkfZMaV4fAND8OiNuSaBrf9Td2BVzdUk2pxODTlDrYSfWT/PZae8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Y4s0tY9C; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Y4s0tY9C" Received: by smtp.kernel.org (Postfix) with ESMTPSA id DA3011F000E9; Mon, 20 Jul 2026 10:12:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784542362; bh=Wj6Eht4nV+LXDmswAnUY/xG6xO9bB65RpQzx+KrkowI=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=Y4s0tY9Crx6M5T5mC3+8z/WeARVA0oist9bWt48uMysQ66Ws1dEgE3yolJgaQ9Sbq RmkjbcpGmWDvDjZa/tHhS6khOjQdQxhBWsUwooXFZ+jTPD80e6KamdnWaHAnp6KtU5 9BlJ7tXkzrv1YCyl660lPPx8+QHqBJtF/AVs4RaYwYEe03/5tLuYnkQ8VvHCIhWloJ 4OPA6QINZn89K0Ja3UahbXPHsvubtXlrKyn3fokvhJ3XeRWLCnoy1JWF4DdcCAsiTe pG3qfnYqd687CeBxGVOFuA4oGPbWUTmbMuUVXsrDTg3fIzIyFMt9qR34P0OYpH8Jvt WoM6Lp/WAlsGg== From: "Masami Hiramatsu (Google)" To: Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers Cc: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: [PATCH 4/4] tracing/eprobe: Fix exact system name matching in eprobe_dyn_event_match() Date: Mon, 20 Jul 2026 19:12:38 +0900 Message-ID: <178454235856.290363.14872590900774231133.stgit@devnote2> X-Mailer: git-send-email 2.43.0 In-Reply-To: <178454232006.290363.11301475407231432622.stgit@devnote2> References: <178454232006.290363.11301475407231432622.stgit@devnote2> User-Agent: StGit/0.19 Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit From: Masami Hiramatsu (Google) 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. 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) --- kernel/trace/trace_eprobe.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) 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;