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 9781B422535; Mon, 27 Jul 2026 16:17:28 +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=1785169049; cv=none; b=BeTfcNlHhJq2ipv1bO/HC83jf+OIlR8Kfu8ZJpguNmQaTq9FszZ1tubgY6Oh5h2JxBj9QX6VxhOZfF34MOnqCcbEPkLGP8WDluyJSZXu0+LfqXpzf4DxvzJgZbRZkMALt2JGsdosPB43t1zZnPKyeLcc5yKC5DQ18AqE5enDBJk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785169049; c=relaxed/simple; bh=DuGGITNd5yN5QlqKO550GIPWLvxH/Ra1Fty4Z7nuowQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=V9w5HnQCS1Io+nq5l4YwuloTyPxNPLQrKZmGoDXO8eDT/pNCTZrJJXE7WNshdwunPMBwA+NrxZNWBcSnBevVVbVssdYf4KufWEAWTJesZmFMRLfT2ZuXdzikUQIGQznS/C0Fw34+1Zn+V4bIJnYZDLeAcEPtWUX9asz+B4b386w= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=OIfFp6Aj; 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="OIfFp6Aj" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 916CA1F000E9; Mon, 27 Jul 2026 16:17:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785169048; bh=QIQsSOkz51tD534ULrgQRD5dpLHUcO+T2TMsf3NXxNo=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=OIfFp6Aj/VqxbvWAIm38SRIIikMYt841umQ0eARYBoyyHthXcIZ7Wo2N4yRCnWOso 0JILkX6GYRJQ2Cfl6FzYWuSn1V7/bpX/R5jIvjVcZIoqmWUhfa/jf4IU0L7+sERfpg peZH9PTpoJ942f3Z/P3zqpsdMphwrdgCWMUn9z9VoAa9lnGBsfRfrazu5jXuf4fSfQ 9ALscyhODbpzpNkQ9z4sx+7jErW01BcfyCCEi2rcKwe4xLS1LiWeg9Tww3w4Ky9apH +48Y8TK4lsOVvnD4TnL1u8nBQva9uU4SgfLLfb2baTZtnLCHbTBzeVjUJWKDtTHH4r Unf/eKsbTKHZw== From: Arnaldo Carvalho de Melo To: Namhyung Kim Cc: Ingo Molnar , Thomas Gleixner , James Clark , Jiri Olsa , Ian Rogers , Adrian Hunter , Clark Williams , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Arnaldo Carvalho de Melo , sashiko-bot Subject: [PATCH 4/5] perf intel-bts: Fix off-by-one in auxtrace_info minimum size check Date: Mon, 27 Jul 2026 13:17:04 -0300 Message-ID: <20260727161705.64807-5-acme@kernel.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260727161705.64807-1-acme@kernel.org> References: <20260727161705.64807-1-acme@kernel.org> Precedence: bulk X-Mailing-List: linux-perf-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Arnaldo Carvalho de Melo Same pattern as the Intel PT fix: min_sz is set to sizeof(u64) * INTEL_BTS_SNAPSHOT_MODE, but the code accesses auxtrace_info->priv[INTEL_BTS_SNAPSHOT_MODE], which requires at least INTEL_BTS_SNAPSHOT_MODE + 1 elements. Use (INTEL_BTS_SNAPSHOT_MODE + 1) to ensure the highest accessed index is within bounds. Fixes: d0170af7004dce9c ("perf tools: Add Intel BTS support") Reported-by: sashiko-bot Cc: Adrian Hunter Assisted-by: Claude:claude-opus-4.6 Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/intel-bts.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/intel-bts.c b/tools/perf/util/intel-bts.c index 0b18ebd13f7c8456..02df3e46048912eb 100644 --- a/tools/perf/util/intel-bts.c +++ b/tools/perf/util/intel-bts.c @@ -830,7 +830,7 @@ int intel_bts_process_auxtrace_info(union perf_event *event, struct perf_session *session) { struct perf_record_auxtrace_info *auxtrace_info = &event->auxtrace_info; - size_t min_sz = sizeof(u64) * INTEL_BTS_SNAPSHOT_MODE; + size_t min_sz = sizeof(u64) * (INTEL_BTS_SNAPSHOT_MODE + 1); struct intel_bts *bts; int err; -- 2.55.0