From nobody Tue Dec 16 22:12:18 2025 Received: from mail-pf1-f202.google.com (mail-pf1-f202.google.com [209.85.210.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 06761254846 for ; Thu, 29 May 2025 04:40:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748493614; cv=none; b=EoRJ/o0oGyGqIrmmb00UL+rOKuaGknVZJ3mIYoX/y3tIBO0JIKCEwZYQrE8yKQnmcXPBRahYDcFK4jO1rxlKcgsxHbNQLsBCU6E0CwD8tdycTWxoJVgZ2tutAoBJHXxtNJrvr/LCS+TbwuShnv/i+P4bdlm7zu+2PRVEy44gs2Y= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748493614; c=relaxed/simple; bh=cjf2fdD0rE5LRjT1VfJDou3dEpA6ok2BqEt1s5yCE/o=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Content-Type; b=EeSH3uWsU+x06neKUEo2yY2OGL3pPtystKW70HM5LH1CzW/575uTWI37R+4FUf0PzyEzC7/ip2FvSjXFPXKHNdBgEKIJdEcUdD4eKLsp9M0G90Y8oxTzd5bPZLMSMcnEwzCPBMAv+xjNi7xjG3AFa8XtqNEyYw4Dsel1aCSmjI8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=wogGTUHN; arc=none smtp.client-ip=209.85.210.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--irogers.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="wogGTUHN" Received: by mail-pf1-f202.google.com with SMTP id d2e1a72fcca58-7394792f83cso390377b3a.3 for ; Wed, 28 May 2025 21:40:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1748493612; x=1749098412; darn=vger.kernel.org; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :from:to:cc:subject:date:message-id:reply-to; bh=9aS71aJOPEt1sm6kO8E07x1jFtf8Q1JUjXvJGHfQ3qA=; b=wogGTUHNrDIU+iVL94US5lFwyK4mGKJPQYMB+HQC8ui+QVv+9LpvzqnK7ksHnvWhz7 gxRXD3rRXmaI2vh6XVhk7m9im0103Yzvv5Z6rb+acnChjBi+vd6cCPZ4mqMBOyyb28dL jeZRdX/FirD2KqGtk2fzrcQaCbfwPGEYkn3dA5Bk141uytbQq8VEaeHNDSrtWCxBjFoo k+uS72788HUwV7IFEfgp9qHURLivTxgmXQMExO0aPsFNUzyzXaJ7paYODlqgxJ2T86Ci UGCs2Vgbxc2vFiNMiXgBZcCTABqQEuxr5Phn9SgGlHZT+Zuy1yh5BxY6nTSYzGyfq9S2 PlMw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1748493612; x=1749098412; h=to:from:subject:message-id:references:mime-version:in-reply-to:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=9aS71aJOPEt1sm6kO8E07x1jFtf8Q1JUjXvJGHfQ3qA=; b=WrOuFnJxIj+cBGqQH8X0Op3btR9P5s01caxKfHuP481wEkPCij75eedAL3KtLOK5p2 7swdB1hiUgen2IhbSI61csEt1cqOjfJm6AJIl9ygcoS51xI8+CwwYoKRbEnobqKr5VDV 1ZOYfJIWq+S6+dOsh1IRyzV1ig6fDMGzQF1sDJ/NUFmeK6WYkewsYODIHiHXDXtTKixe Ld4VifezJaFfu2fvsYiKTBtBlse+oHBTbP1qrPZBRzsGSjH39EwNDR66faO5K9Nxuiaf KvYSpspM28peUteMHMYBIvBZyNDreGt2ZiNZQMBJ3pmd81i4M6XUO6CSTSMeqzOy5SFk Ow3A== X-Forwarded-Encrypted: i=1; AJvYcCWJ6R2bAUTzlpEkLau1vZguew9fGgUi9lWJjMqqs/EQEIi+AoCEELAk77fUiZjdSvAZ2d3dhjd0fc7iMYA=@vger.kernel.org X-Gm-Message-State: AOJu0Yy3L8zB0iYR0EcvTNZzgcoHbXO9H6dw2JO6kEGLuKGvRwUau73x Vag8Dbo6ygVDcDFOcmH22/3eFB0quGGEnkgIlh462ZLlx0P0wDuO3qv1ZVANQPsDFmyUq5ekD+H IIeT3whAdJQ== X-Google-Smtp-Source: AGHT+IFlKCkEqX1XRqJjw3YEn4vn41KmuiPbLqe3e6dAoMnichsXHqoCMaXHDL0e/0IqWUt2otPig48NXi89 X-Received: from pfbik10.prod.google.com ([2002:a05:6a00:8d0a:b0:746:fd4c:1fcf]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:4654:b0:736:4e67:d631 with SMTP id d2e1a72fcca58-747b0e79bacmr1311000b3a.23.1748493612073; Wed, 28 May 2025 21:40:12 -0700 (PDT) Date: Wed, 28 May 2025 21:39:39 -0700 In-Reply-To: <20250529044000.759937-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250529044000.759937-1-irogers@google.com> X-Mailer: git-send-email 2.49.0.1204.g71687c7c1d-goog Message-ID: <20250529044000.759937-4-irogers@google.com> Subject: [PATCH v4 03/24] perf build-id: Truncate to avoid overflowing the build_id data From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , John Garry , Will Deacon , James Clark , Mike Leach , Leo Yan , "Masami Hiramatsu (Google)" , Ravi Bangoria , Charlie Jenkins , Colin Ian King , Andi Kleen , Dmitry Vyukov , Graham Woodward , Ilkka Koskinen , Zhongqiu Han , Yicong Yang , Athira Rajeev , Kajol Jain , Li Huafei , "Steinar H. Gunderson" , Stephen Brennan , Chun-Tse Shao , Yujie Liu , "Dr. David Alan Gilbert" , Levi Yun , Howard Chu , Weilin Wang , Thomas Falcon , Matt Fleming , Veronika Molnarova , "=?UTF-8?q?Krzysztof=20=C5=81opatowski?=" , Zixian Cai , Steve Clevenger , Ben Gainey , Chaitanya S Prakash , Martin Liska , "=?UTF-8?q?Martin=20Li=C5=A1ka?=" , Song Liu , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linux-arm-kernel@lists.infradead.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Warning when the build_id data would be overflowed would lead to memory corruption, switch to truncation. Signed-off-by: Ian Rogers --- tools/perf/util/build-id.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/build-id.c b/tools/perf/util/build-id.c index e763e8d99a43..5bc2040bdd0d 100644 --- a/tools/perf/util/build-id.c +++ b/tools/perf/util/build-id.c @@ -951,7 +951,10 @@ bool perf_session__read_build_ids(struct perf_session = *session, bool with_hits) =20 void build_id__init(struct build_id *bid, const u8 *data, size_t size) { - WARN_ON(size > BUILD_ID_SIZE); + if (size > BUILD_ID_SIZE) { + pr_debug("Truncating build_id size from %zd\n", size); + size =3D BUILD_ID_SIZE; + } memcpy(bid->data, data, size); bid->size =3D size; } --=20 2.49.0.1204.g71687c7c1d-goog