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 34F1448594D; Mon, 19 Oct 2026 05:53:22 +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=1792389224; cv=none; b=ThBAqCCqCtohJRfvsUFeOMth79jTYgjk/MFWNUcAdL+cicbTxeKHD+/LdAVBXLmNUcX3FW1pk25inrdwE30VMn9x5xEzsMkl/rFYgMzEsfcsZNbUl+LvacNS+VnJGu0kkhIPX7G7WkWw+4btwi5pwj4wRO2O8KxxUukGpSHmCIo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792389224; c=relaxed/simple; bh=CO0qiiLzqINzhsjxwW01tyuZdoRqmH2UicEKiWD3+sE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cDm31WVEfKOT8VfWywlpaVAPQjRQVn47NySC/8wVLisTrjfe8nRdKxe52khLUlUvNGhVsO1228zZnKiZcLL0X5X1CqmpQwGhG2HWOXvzwGxjsvWQcxoPtJy5YUJTe+cP86Zcg8JB+2+0eBuhfbcdewAQyL1D3cOUmPDWSkvX/9g= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=MyZUht/b; 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="MyZUht/b" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1EF501F000CF; Mon, 19 Oct 2026 05:52:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792389136; bh=Svp4QLHElgqe4ZARoRoAb5H/1fPI0Pk/UdQc6mVvJKY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=MyZUht/bEy160lUIWBhANhmrw0XkI8MsJ/0fkN1wmZY2VsIYWGT02s4ZvwUjzDtDb EGtd7GOGJ90d64lid8tC0lntf2Ve70CqXlv7B6JkuWBHEnSfGxiG8LWfRSBR++At7A CGAfvzbfj5JnrM+eRZGSEzq5j1q61AmeSFwF5aau+TrPzA3RghYEayIOcOMX3rsws9 a4Fr5NkF4H9H9Vv81lADTdV2uhwfVlQBkKrIr5BImjGthb81Z2o6keMr+VCXPUMdhv 1z4Dkp4lqs5go6bqLVNrJOCI0DGSpTPyrR6i4BwgZTStn/uvYKOtv4braZK9n9r1wO 6TToK0ELxIL0w== From: Namhyung Kim To: Arnaldo Carvalho de Melo , Ian Rogers , James Clark Cc: Jiri Olsa , Adrian Hunter , Peter Zijlstra , Ingo Molnar , LKML , linux-perf-users@vger.kernel.org, Sashiko Subject: [PATCH v2 4/5] perf symbol: Check result when reading section headers Date: Sun, 18 Oct 2026 22:52:06 -0700 Message-ID: <20261019055207.39325-5-namhyung@kernel.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261019055207.39325-1-namhyung@kernel.org> References: <20261019055207.39325-1-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