From nobody Mon Jun 15 15:06:17 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 4EE04314B66 for ; Sat, 11 Apr 2026 11:28:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775906883; cv=none; b=DZWfpaQ88nayYskXyKmI+7cS4KxBtSVpicyxzHDEhZkoDU4wbaDu1iI/G1SrxADKRqE4kJXR5vUxTiodFmgOUGYvxXFQr7oBVqQCw6Ce+fAd1PxjQOSpvwJfet8eboVF0Iqx9rOt1fl6JCWqJVcY5NR18YudL4cb9wgDZg78qFY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775906883; c=relaxed/simple; bh=BQVQCDkOc4x/fFomqunyduvfZ/C0xsNRZmVhNVPv+s0=; h=Date:From:To:Cc:Subject:Message-Id:Mime-Version:Content-Type; b=jdZ59dUU215Zd3J3X6y12nKc+zGhaOO80z5OZ6BoP3uuJH3AolvhjezKAOLmkBjxHOMK9GzJqeIwONcKMfxy+QzTuJKNxRxwAIb0oziHVM5MH3Sks24alVHnaT6gZTLq8nI5BpnTorOSZ9WrWEe8L7GRtQ9kq95oVH0iKbeuIBY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=EW4FT2Hh; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="EW4FT2Hh" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 777E3C4CEF7; Sat, 11 Apr 2026 11:28:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1775906883; bh=BQVQCDkOc4x/fFomqunyduvfZ/C0xsNRZmVhNVPv+s0=; h=Date:From:To:Cc:Subject:From; b=EW4FT2HhhBimju6ZhjEIKd+DsY8sLkR1ZTaBnI7ryejNYdMbjbczK+Epw0US8qKdq 83SbFxndFfaJAtccTQTpCU0mcrvltKs2SWMHZltm1O5L9cb1U96VVF4z2qXALdty/c 8sNChiCsazmtccXE3ahzd0bcWtwyUpVgZPebkGtPJnj5gELovauR9vQBgDTBvdCiwt Qqtx9LwvIL2N2+n0Umm0Lw7FvZ8TktG+SZvCHn9bZkfEtsJpts1+wD5KT72AElSbGe nMXHfeA/1CwQEYsKuFKcqX5yU2u/ysy+ka44H23VajN65rte/WMMqPm7R5LEqU70ft 0p23N+DibDeRg== Date: Sat, 11 Apr 2026 20:27:59 +0900 From: Masami Hiramatsu (Google) To: Linus Torvalds Cc: Pengpeng Hou , Steven Rostedt , Masami Hiramatsu , linux-kernel@vger.kernel.org Subject: [GIT PULL] probes: Fixes for v7.0-rc7 Message-Id: <20260411202759.13a90fec3c05b399acdcabba@kernel.org> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Hi Linus, Probes fixes for v7.0-rc7 - tracing/probe: reject non-closed empty immediate strings Fixed a buffer index underflow bug that occurred when passing an non-closed empty immediate string to the probe event. Please pull the latest probes-fixes-v7.0-rc7 tree, which can be found at: git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git probes-fixes-v7.0-rc7 Tag SHA1: 0c7333fa2ead5a8cd9bbd9825fd034eecf23fb70 Head SHA1: 4346be6577aaa04586167402ae87bbdbe32484a4 Pengpeng Hou (1): tracing/probe: reject non-closed empty immediate strings ---- kernel/trace/trace_probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --------------------------- commit 4346be6577aaa04586167402ae87bbdbe32484a4 Author: Pengpeng Hou Date: Thu Apr 2 00:03:15 2026 +0800 tracing/probe: reject non-closed empty immediate strings =20 parse_probe_arg() accepts quoted immediate strings and passes the body after the opening quote to __parse_imm_string(). That helper currently computes strlen(str) and immediately dereferences str[len - 1], which underflows when the body is empty and not closed with double-quotation. =20 Reject empty non-closed immediate strings before checking for the closi= ng quote. =20 Link: https://lore.kernel.org/all/20260401160315.88518-1-pengpeng@iscas= .ac.cn/ =20 Fixes: a42e3c4de964 ("tracing/probe: Add immediate string parameter sup= port") Signed-off-by: Pengpeng Hou Reviewed-by: Steven Rostedt (Google) Signed-off-by: Masami Hiramatsu (Google) diff --git a/kernel/trace/trace_probe.c b/kernel/trace/trace_probe.c index e0a5dc86c07e..e1c73065dae5 100644 --- a/kernel/trace/trace_probe.c +++ b/kernel/trace/trace_probe.c @@ -1068,7 +1068,7 @@ static int __parse_imm_string(char *str, char **pbuf,= int offs) { size_t len =3D strlen(str); =20 - if (str[len - 1] !=3D '"') { + if (!len || str[len - 1] !=3D '"') { trace_probe_log_err(offs + len, IMMSTR_NO_CLOSE); return -EINVAL; } --=20 Masami Hiramatsu (Google)