From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-dy1-f202.google.com (mail-dy1-f202.google.com [74.125.82.202]) (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 5F496386557 for ; Sat, 2 May 2026 15:57:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=74.125.82.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777737451; cv=none; b=Tg7NzBiDse8uX6MXudmjcfTLG3e5iPH+XE6vLPwKWw/jh6Vnfwn6fghdMGqBNBlrcIM1BSEDtO2q41AQIj7XbltaUgbq8Td+pqvSs+svzcKr1PekECQv31gw79S/qAwqOMPKyFCY2oZbKrMeA30A9NWkZZ2OLj1JNrGRTZHTP5Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777737451; c=relaxed/simple; bh=Qs82aQblWtjLLgeF3M5ilDmR1IJTXAu5AzapLrf9cY0=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=C6dxkPIQ03a667cDWfpwHJKqqC6PDd4aoI34VTl+u2RQKPWkbpRCQH3uVRlwxMn+B8HGgC/M0CdWe0OX4k+HtyFojDU2mi/FPJN8F2prWYwkM25KIcRZ9nPZ5P0RRNWeQyGhPKpLuAfkV7QiKRiWSm3A2QtqWmKKNOdCLq6Wrfk= 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=Etww/siu; arc=none smtp.client-ip=74.125.82.202 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="Etww/siu" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2c0f6593ef5so4330304eec.1 for ; Sat, 02 May 2026 08:57:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777737449; x=1778342249; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=Tt7TK3JC4x6/Ps79h7tGqZ56cFuxWDFNGGhg/Dvi8W4=; b=Etww/siu4pTyjG8dgraUTSsRH+k1VfqNDcBpSvOoLhumt5/oQ+gTOLCaeUD8rDRPjy vxxUSkz7BI7M9VIpVYfijiyd2TsjGnFpx8t3p/MMOTiVNjODtx2i2ietHkPYeC3I6L1P 8enzbMMj8pxtOI74BgNwEgDK8RZeULBRkEj5mCgHYbfsP5gNaBq66IdHRKEG+V6tK7E/ 90nbv8PZX9frkhj+0Vt+buDGerAswIM4wgpJT/iTc1UPpFWggFupmKJ25zO8KF+Vvp2V aPoioWH/YeuMnj0ct0xsCRbP6CRHOK6K4B2SbWoxJ459+0HdjEFmIkZF668evPsLzkvd monw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777737449; x=1778342249; h=cc: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=Tt7TK3JC4x6/Ps79h7tGqZ56cFuxWDFNGGhg/Dvi8W4=; b=ASjsnuMw/RQpSWT0JPsJdUt/TbtFvQGhh0P63L/FZoY1QMQDQMTVvz0Pjbvn9yXgty oYD+4QMr+PfxvfxtvTSn511FJgEJv+aT/IhY0flpn5qbL4oOvyFrO5UwpAu0w9EZUSRy eojSOCBg7ywEuXc1leK5374NZaxVF4FQ4TQphjMWXkFlOUniio0VSAkSdHLSXZyU0opd iFmLxflGpO3C6YwGzBDqeP1ezOBuBPud9xMhXpZGt6kxD70iZiTEPy+qcqwYi3sj4IA1 uO4tFlF5F3NcSYKaDSGZC5l0X3RytLv0l7NvnU1g/Vd2GsafsSIrDpXyEeq7O6KF0q3H ORFw== X-Forwarded-Encrypted: i=1; AFNElJ+2qjdc/Pa/PlUbVIqWxdXhmH/WCXzDXTSX8/wmDKSLQUom/yiFTqVqVJYHN1eJ/RuNsFhlBzuufsTRclI=@vger.kernel.org X-Gm-Message-State: AOJu0YwNJ8HZ6qnbVrqzZp0p0QlhBRjNMQxwvNOxaVaCDkPVzv5oBPzb QAr/TPzrrfIpBVQfGUMiNj/8mvVMDlQuQQPTRjk5w7LKsCTspNgyxH9UzZPDe8bp1bGfeIuuDEJ IF5HUnhMkrg== X-Received: from dlbph19.prod.google.com ([2002:a05:7022:3713:b0:12d:d0a4:2ed9]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:7022:61a:b0:128:d967:4678 with SMTP id a92af1059eb24-12dfd80734emr1533128c88.23.1777737449277; Sat, 02 May 2026 08:57:29 -0700 (PDT) Date: Sat, 2 May 2026 08:56:55 -0700 In-Reply-To: <20260502155656.478642-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260502064839.282422-1-irogers@google.com> <20260502155656.478642-1-irogers@google.com> X-Mailer: git-send-email 2.54.0.545.g6539524ca2-goog Message-ID: <20260502155656.478642-6-irogers@google.com> Subject: [PATCH v2 5/6] perf annotate-data: Fix libdw API contract violations From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Jiri Olsa , Adrian Hunter , James Clark , Zecheng Li , Masami Hiramatsu , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Ian Rogers Content-Type: text/plain; charset="UTF-8" Check return values of `dwarf_aggregate_size` and `dwarf_formudata`. Validate `dwarf_diename` before `strdup` to prevent potential crashes. Fixes: 2bc3cf575a16 ("perf annotate-data: Improve debug message with location info") Fixes: 4a111cadac85 ("perf annotate-data: Add member field in the data type") Fixes: 8b1042c425f6 ("perf annotate-data: Set bitfield member offset and size properly") Fixes: fc044c53b99f ("perf annotate-data: Add dso->data_types tree") Assisted-by: Gemini-CLI:Google Gemini 3 Signed-off-by: Ian Rogers --- tools/perf/util/annotate-data.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/tools/perf/util/annotate-data.c b/tools/perf/util/annotate-data.c index 1eff0a27237d..e881a40a4885 100644 --- a/tools/perf/util/annotate-data.c +++ b/tools/perf/util/annotate-data.c @@ -74,7 +74,8 @@ void pr_debug_type_name(Dwarf_Die *die, enum type_state_kind kind) break; } - dwarf_aggregate_size(die, &size); + if (dwarf_aggregate_size(die, &size) != 0) + size = 0; strbuf_init(&sb, 32); die_get_typename_from_type(die, &sb); @@ -250,9 +251,10 @@ static int __add_member_cb(Dwarf_Die *die, void *arg) if (dwarf_aggregate_size(&die_mem, &size) < 0) size = 0; - if (dwarf_attr_integrate(die, DW_AT_data_member_location, &attr)) - dwarf_formudata(&attr, &loc); - else { + if (dwarf_attr_integrate(die, DW_AT_data_member_location, &attr)) { + if (dwarf_formudata(&attr, &loc) != 0) + loc = 0; + } else { /* bitfield member */ if (dwarf_attr_integrate(die, DW_AT_data_bit_offset, &attr) && dwarf_formudata(&attr, &loc) == 0) @@ -273,7 +275,9 @@ static int __add_member_cb(Dwarf_Die *die, void *arg) dwarf_diename(die), (long)bit_size) < 0) member->var_name = NULL; } else { - member->var_name = strdup(dwarf_diename(die)); + const char *name = dwarf_diename(die); + + member->var_name = strdup(name ?: "unknown"); } if (member->var_name == NULL) { @@ -370,7 +374,8 @@ static struct annotated_data_type *dso__findnew_data_type(struct dso *dso, if (dwarf_tag(type_die) == DW_TAG_typedef) die_get_real_type(type_die, type_die); - dwarf_aggregate_size(type_die, &size); + if (dwarf_aggregate_size(type_die, &size) != 0) + size = 0; /* Check existing nodes in dso->data_types tree */ key.self.type_name = type_name; -- 2.54.0.545.g6539524ca2-goog