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 D648E3328E9; Fri, 17 Oct 2025 15:15:55 +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=1760714155; cv=none; b=OxrT9I1u9Kzlavi9cktsXLiHX+DGUuIMZtB6r3DUsn4Ot6+xWtTdwlkVHlslyybXA9qjtpoQPlLls6o/964rbVZmUfBTQj1XcqAXyArEmEJEQ7JHg9rEaZykutHHSi27pUkNqw1YiSzFlHzw2dmS6FSsfkAvovimsTqn92FwLEg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760714155; c=relaxed/simple; bh=BVHcLPYGokpV+gH5NixyWuq47mSQyr/S1Rj+RkPgePg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=lJNHvxzyxJERajAv7lun0ymQjAhafhGESX/CYx+kLmWGzBwHohBGb36FYgxUfsF0BxUWKUzGv+4SCjAEd+xaW9mGmXbb1U3Ouma00ZC67gL3vMbmxPDHmEAAW3yOtN3eBLBZOyPECiMhtz78BiEYhArmuZmP51G9fNc06LUNvXI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=NbOVjdTV; 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="NbOVjdTV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 58147C4CEE7; Fri, 17 Oct 2025 15:15:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1760714155; bh=BVHcLPYGokpV+gH5NixyWuq47mSQyr/S1Rj+RkPgePg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NbOVjdTVkbDLey04DSkc3JEahhX4Sn6C9uzUdzwUJrDRCzhlJ5IIWTOQfnlZBPYXr hJTaa+He1u/MMefir/U0Z7WozyoeKrxdt4Gi4LibSta1j6UbnjqqfhCUHr6qF2vo2m BtdYLvCB5/HZopc7i2+w03er3wuhTai2OMST0ftw= 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 6.12 029/277] perf session: Fix handling when buffer exceeds 2 GiB Date: Fri, 17 Oct 2025 16:50:36 +0200 Message-ID: <20251017145148.211708753@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251017145147.138822285@linuxfoundation.org> References: <20251017145147.138822285@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 6.12-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 dbaf07bf6c5fb..89e5354fa094c 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -1371,7 +1371,7 @@ static s64 perf_session__process_user_event(struct perf_session *session, const 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 || perf_tool__compressed_is_stub(tool)) dump_event(session->evlist, event, file_offset, &sample, file_path); -- 2.51.0