From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 2081331AF37; Mon, 27 Oct 2025 18:42:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761590538; cv=none; b=D8GsWgLwYqSNbcgi9Q5pYG2g991xCT59UFl5JZBjrRDbJmyiZrA2cDnko23AdOzKLBrXLoMHxg4Fr7wq0tTt2jvwg4jVPxK6kVHHtMs7pCoO4Wob2LbKfw2iSnQaELdH8f1+fS5qsjd0fT/ulHSLKMI9dRPwEOxfqLuY2y5xggk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1761590538; c=relaxed/simple; bh=Fi1+Yg+ZqQl5M6Oa040+U98kd6lu2uYFNGOU0HGT+ec=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=FrHgYYpJGGM1J0NqQvSKWw/6TH/I1l/fxytqbO1M1W7+FwyuIpWdL2JPO6PhPkEIfimtiqGatHoamZiI4rEyZ+1TF5fFlzAZqQqDgQXEIvb3EpWTlCqGAeyfO2Q3VFfKCP91f1ho2ikbSSuhAI+h8HBzHiJmmLhyVh8aZjijp20= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=dzFdVyOq; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="dzFdVyOq" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A04CCC4CEF1; Mon, 27 Oct 2025 18:42:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1761590538; bh=Fi1+Yg+ZqQl5M6Oa040+U98kd6lu2uYFNGOU0HGT+ec=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dzFdVyOq3yqzvq3rPJdCqp6pGXOz07/rYjGgEI12cm1Z+FV8qN20M0x+x+g6EFLNf V9MTptA/esdNyda8OeFS1YRdYa65kv5Zb1vYb5dHIAxyqMS5+gbZuXvodYN5udG6lI 5O7T7eQHJ8kyZuAaHDOuERk6uBUTN8FIxpJ5Qgy0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Tamas Zsoldos , Leo Yan , Namhyung Kim , Adrian Hunter , Ian Rogers , Jiri Olsa , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 5.4 082/224] perf session: Fix handling when buffer exceeds 2 GiB Date: Mon, 27 Oct 2025 19:33:48 +0100 Message-ID: <20251027183511.190935626@linuxfoundation.org> X-Mailer: git-send-email 2.51.1 In-Reply-To: <20251027183508.963233542@linuxfoundation.org> References: <20251027183508.963233542@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Leo Yan [ Upstream commit c17dda8013495d8132c976cbf349be9949d0fbd1 ] If a user specifies an AUX buffer larger than 2 GiB, the returned size may exceed 0x80000000. Since the err variable is defined as a signed 32-bit integer, such a value overflows and becomes negative. As a result, the perf record command reports an error: 0x146e8 [0x30]: failed to process type: 71 [Unknown error 183711232] Change the type of the err variable to a signed 64-bit integer to accommodate large buffer sizes correctly. Fixes: d5652d865ea734a1 ("perf session: Add ability to skip 4GiB or more") Reported-by: Tamas Zsoldos Signed-off-by: Leo Yan Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Link: https://lore.kernel.org/r/20250808-perf_fix_big_buffer_size-v1-1-45f45444a9a4@arm.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/util/session.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 01e15b445cb58..cd60a878752f2 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1504,7 +1504,7 @@ static s64 perf_session__process_user_event(struct perf_session *session, struct perf_tool *tool = session->tool; struct perf_sample sample = { .time = 0, }; int fd = perf_data__fd(session->data); - int err; + s64 err; if (event->header.type != PERF_RECORD_COMPRESSED || tool->compressed == perf_session__process_compressed_event_stub) -- 2.51.0