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 95B0A386C3F for ; Sat, 2 May 2026 15:57:32 +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=1777737453; cv=none; b=pSkHo4NrIWsNe1GSOAg/UB4rFBaYBF2UEu3S+U2qYiwlp8xNNQ9eS47Y4BCqJ8qoZQbS2cBj+j6DrldL9xzN6+K+Ly2fi2c1a2xoaW/WrI7Q1JjVqXf2YsPnnQsJfJddSMvB0PZHLiQHtaqQCc4AylkbwJngIxYeaSa1XULPYkg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777737453; c=relaxed/simple; bh=aejM4DU7JRkliTqft/Llsk1zUeLQIbJRjWsEykxh2ys=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=T1FUwA9onPbQptKPQb7cY9B6zYaagd8jg7xYqjlqp3JekrAhqO9XvLdGW2fmwgdMd9mIKfcFt0QeI9TSMahuPdiL43Vnx/AyMVOb6gdoDWbwbPYnFwl5PLfwdq9v+OCGyRzPocrVqvglMyGZlwOY1rGZTX8QNcvfSkRNIbj3YKI= 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=eTLixmli; 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="eTLixmli" Received: by mail-dy1-f202.google.com with SMTP id 5a478bee46e88-2ba9a744f7dso5114234eec.0 for ; Sat, 02 May 2026 08:57:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1777737452; x=1778342252; 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=cQmVm0Mk8S8yIw6NN5Lf29gNVzq8HKFVdhFBj2+c9Uw=; b=eTLixmliEyuBkQWOJAZLMP4GBad6asQ75oGhS9/9b0qx4BG/gigdAEiD7B0DDhiXzG MVehFt+x643i3Y5YzQOqy4Jw+aJwsfvXu7i3XuUO5YBcsksUM+lnXpks04/jW1r66IUl Q8CG0hR0has6SyncZ2hHClo2fWOv1oWYoBWFMA45IrFOT6sn1Rb1Cp/2nnrgwCb6eqfW Mt0jbHkWSEG+hzxuDYdMqH4T5qbrkOLXFxu1Q0fJ64FxhHsxdV1oQ3gvmOmTst+3w7Rf MTMbZICMhPfndS6cMDMoJbokHtOcvZVv3V3Jlksh7/DaBU1rZpHjdbzJQcAJD+kDpwFd PBhA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1777737452; x=1778342252; 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=cQmVm0Mk8S8yIw6NN5Lf29gNVzq8HKFVdhFBj2+c9Uw=; b=ldzVMHNi+1EDZcmLAgnnDjDHtvyGeH+hf9GJRdniB1CAeFY4bsq9zgGwosmyXyztGz G9m7WVwSwyEQpWphpeIXTHj0xKMb4hYrd8TdjKo1W3rEUmKSqthDFhUkjpK71qg9Vd8D B6X15MwJ2/y/Fa9Q94jcPNvhGlCMPsIclBKZeeD0PbIz4C+7WaAppOYJ7x0VtSHhqfpE ThKyrV7Qk87HdhhnxuAPCz070m6aMNkuQamCBKXRwBRIOCkNIvYmoW1LtHqepFU9mJQN VT/eKuzO1hFf7PgiT6WyAfNq9MECkXSIAz7bquWWqpF1oC/5s55mpRJmRMevGOSZGvEp 2REQ== X-Forwarded-Encrypted: i=1; AFNElJ8G5yuMOyod8spzQrnQZlLdX2Gu0wUMXiPjayQmaIXb16OvrT+HFw+v2/2d7NFX3f2j0M7zc/j+pLM0Beg=@vger.kernel.org X-Gm-Message-State: AOJu0YzR+gN923O/DEMPOuZFve1xSUFom1rzr22SvFSBdaLgRgtFeLu9 vvTqR+oMgL2Z5UGSMKG6aQ7Ga5V8s8yC1lTIzqWbS88Iq7ozZewGwVr3lmAlRmmk1i9tnCHg8YZ S/CzfKcOkpA== X-Received: from dlad7.prod.google.com ([2002:a05:701b:2207:b0:128:cfd6:a3c6]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a05:701b:2412:b0:12f:1f67:e744 with SMTP id a92af1059eb24-12f1f67e7f4mr258370c88.44.1777737451549; Sat, 02 May 2026 08:57:31 -0700 (PDT) Date: Sat, 2 May 2026 08:56:56 -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: <20260502155656.478642-7-irogers@google.com> Subject: [PATCH v2 6/6] perf debuginfo: 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 value of `dwfl_report_end` during offline initialization. Validate `dwfl_module_relocation_info` result before passing to `strcmp` to avoid potential segmentation faults. Fixes: 6f1b6291cf73 ("perf tools: Add util/debuginfo.[ch] files") Assisted-by: Gemini-CLI:Google Gemini 3 Signed-off-by: Ian Rogers --- tools/perf/util/debuginfo.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/debuginfo.c b/tools/perf/util/debuginfo.c index 0e35c13abd04..49cb7f9b715d 100644 --- a/tools/perf/util/debuginfo.c +++ b/tools/perf/util/debuginfo.c @@ -62,7 +62,8 @@ static int debuginfo__init_offline_dwarf(struct debuginfo *dbg, dwfl_module_build_id(dbg->mod, &dbg->build_id, &dummy); - dwfl_report_end(dbg->dwfl, NULL, NULL); + if (dwfl_report_end(dbg->dwfl, NULL, NULL) != 0) + goto error; return 0; error: @@ -167,7 +168,7 @@ int debuginfo__get_text_offset(struct debuginfo *dbg, Dwarf_Addr *offs, /* Search the relocation related .text section */ for (i = 0; i < n; i++) { p = dwfl_module_relocation_info(dbg->mod, i, &shndx); - if (strcmp(p, ".text") == 0) { + if (p && strcmp(p, ".text") == 0) { /* OK, get the section header */ scn = elf_getscn(elf, shndx); if (!scn) -- 2.54.0.545.g6539524ca2-goog