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 5592A3F4100; Sun, 18 Oct 2026 16:37:46 +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=1792341474; cv=none; b=rTahgZYllyTLs/tQyogvPKWpIlvUAvIFQkaRSGlRtJpgL8I50jXXxG1lpbJQ6o2N2g2/ccszIZzHjFOWVrw8CRSpzCzQOxCE6uFCSr2HmKVgKEoiiIGxjFa8AMR/zYmC6jjcJvWn/ZOuoV370WvdpixFLhTjljmiaouF9Hz1arA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792341474; c=relaxed/simple; bh=dKYhuoswLQgctKqKYJzS2AUuFaMR02qlG9qayx4UiiA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ANdkrJ5VuXXlHQAWdZ3R8eBPiUjP9ttNn5tR5F/HyzKQvB5ykR5wfsc9LnU/99H+joHRgAahuDigC81gULnBpW95d/Y7BS0r454lEz2uNkU8DV5XeaU63fbqTZOcYzXTTCnqyw+lPi5Ixc59bAoqdfGo1437amEMC0ixIG42O6U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=SEQATRqY; 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="SEQATRqY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8615D1F000C5; Sun, 18 Oct 2026 16:37:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792341465; bh=TTRqC+9annBATm7Nud+6/q2rMOMGEfcPhy9IL/UodDk=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=SEQATRqYnL9zV+Bya3s1NQx3Q9SBibM2iuBHeOXaXtXL4mnrEamazfB3yNzFNpBZ1 5lKMAhtqwciqeohQLt+ijo4BnzzSpzA891imElvzPLOp2U8YSZfQO7c3kpiprAbbPi wa6TSrC3xxtUm1BljCgyas6HMOkJQDcrZdjNAC+e8MEKj/OIOIofTLigGR5nCK1Bks ZxuGKho8lGFv4/uoiKP9p9sYmToMjHEMSyW7TIBXFMRS2UZkolHf/B1+LAXiPeo+tL MoW/Hj+R59aSVfw7b2oIpPYnP42uZBjCgHMatZgRUpTlCJwUbeNPC0960A+QV143j6 4CSOUScCQqC+A== From: Namhyung Kim To: Arnaldo Carvalho de Melo Cc: Ian Rogers , Jiri Olsa , Adrian Hunter , James Clark , Peter Zijlstra , Ingo Molnar , LKML , linux-perf-users@vger.kernel.org, Sashiko Subject: [PATCH v1 4/5] perf symbol: Check result when reading section headers Date: Sun, 18 Oct 2026 09:37:40 -0700 Message-ID: <20261018163741.850434-4-namhyung@kernel.org> X-Mailer: git-send-email 2.56.0.176.g3575e65682-goog In-Reply-To: <20261018163741.850434-1-namhyung@kernel.org> References: <20261018163741.850434-1-namhyung@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 Otherwise it may access uninitialized section header struct. Reported-by: Sashiko Closes: https://lore.kernel.org/r/sashiko-outbox-170233@kernel.org Signed-off-by: Namhyung Kim --- tools/perf/util/symbol-elf.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index 1e2716c6af45712a..00ea0e19020fb256 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -196,13 +196,15 @@ Elf_Scn *elf_section_by_name(Elf *elf, GElf_Ehdr *ep, while ((sec = elf_nextscn(elf, sec)) != NULL) { char *str; - gelf_getshdr(sec, shp); + if (!gelf_getshdr(sec, shp)) + goto next; str = elf_strptr(elf, ep->e_shstrndx, shp->sh_name); if (str && !strcmp(name, str)) { if (idx) *idx = cnt; return sec; } +next: ++cnt; } -- 2.56.0.176.g3575e65682-goog