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 516B743802B; Thu, 3 Sep 2026 11:05:02 +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=1788433502; cv=none; b=bdh6JbA1AyeK/Gpiou9+hU4CLx9QRjv0/y4qUm+7Yqdu+R55muq4lEiv0A9INNZX8vOvk0ckG/Bz0bwoDXOuWg4uASyK9UyqOCCVSYGCrCGHCjH+xvxaH7nMnt+5NpbGmotuHPGc3QXuwpO/AGd+K9u35Eb4EbxmnDAAHghxiN0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788433502; c=relaxed/simple; bh=fjTgsBxrgzCHCQ91O9VNEkGJ05DbXsonzo80saT7PMk=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=YCbRibP+aH5B4DWzVCMP0Zm0Tr7fK2AUpySbPMAW4i9T3qO72UYF0sTHJ1dW23fogSHo8uvfADoIfdw9d6APMgvFEkNNRbtv/sMxBwWNWyS/jbuW0VgxXzlD8pbgd3VmdabxJEgSU0Pi1yf/GjAbVx1pmzxGY9RSgRyw0/kvKmc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=mFCkdzTr; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="mFCkdzTr" Received: by smtp.kernel.org (Postfix) with ESMTPS id C1BFAC2BCB8; Thu, 3 Sep 2026 11:05:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1788433501; bh=fjTgsBxrgzCHCQ91O9VNEkGJ05DbXsonzo80saT7PMk=; h=From:Subject:Date:To:Cc:Reply-To:From; b=mFCkdzTrcSdmyR5iKFV9USwemu8vEWao1HKaZnWhteT7j1xIV+9/XxudH48leb4mI XZYQNIYqz0eHJTY9n6W3YOn4m17F2EQyLuVzPdH0AxAKuaCmL34qOijSpshpJiy/0j 1LHN3pl6/h6Tu5Ddb1DGVOt9KavphcTzoTYe2hCyfRAI4fBVF4rnDrPkhuJsNVMWue 4ANp1YqHymwKE/IYqbmj7yeAQci39dnOownBdkvsEvrsIo98fRWCoPhTWKUiPVZv5E +eYNkkVQmpvuCe+G29W/mmS5iCySQi8OZ1Gr5NaJscB3PdC/x40MyO53YSQxDxVzjN V0MD3cyAUVTjw== Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 95839C624A4; Thu, 3 Sep 2026 11:05:01 +0000 (UTC) From: Mark Amirkan via B4 Relay Subject: [PATCH v2 0/2] perf evsel: Validate cross-endian samples before byte swapping Date: Thu, 03 Sep 2026 04:04:19 -0700 Message-Id: <20260903-sympwn-linux-002-final-v2-v2-0-0aee1fca1f95@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAAAAAAC/42NQQ6CMBBFr0K6dkxbSEVX3sOwKGWAMdCSFiqEc HcBL+DyJe+/v7KAnjCwR7Iyj5ECObuDvCTMtNo2CFTtzCSXit95CmHph4+Fjuw0A+cSarK6gyg BU67zqpaCG8H2/eCxpvlsv4ofh6l8oxmP4GG0FEbnl/M8isP75ycKEHAzCjOhVJmL7Nn0mrqrc T0rtm37AtTpQTXUAAAA X-Change-ID: 20260903-sympwn-linux-002-final-v2-e30a8df210c1 To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , James Clark Cc: Mark Amirkan , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org X-Mailer: b4 0.16.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1788433501; l=1879; i=markdamirkan@gmail.com; s=pscsi-20260818; h=from:subject:message-id; bh=fjTgsBxrgzCHCQ91O9VNEkGJ05DbXsonzo80saT7PMk=; b=GpM47J3aBt0a9DqS1ASyqN8OypFVI95A2mbLkewsLzx9dio0alYw/4LnMDxNyc4d1utR2ynbE 4YbH83CSykhD+DCIwF8V3HDNEeN8uHKdr7err1DcrwNpeaezl8hTpYq X-Developer-Key: i=markdamirkan@gmail.com; a=ed25519; pk=/wb49ibt4gZFDncmhFQBYtjPvzT1tfJtvK4Mqt1P2Wc= X-Endpoint-Received: by B4 Relay for markdamirkan@gmail.com/pscsi-20260818 with auth_id=961 X-Original-From: Mark Amirkan Reply-To: markdamirkan@gmail.com Two paths in __evsel__parse_sample() use values from an opposite-endian perf.data record to modify the record before checking that the data fits within event->header.size. Patch 1 checks the complete branch stack before swapping entry flags. Patch 2 checks the RAW payload and the complete 64-bit words touched by mem_bswap_64() before swapping the data. The malformed branch-stack and RAW records reproduce as out-of-bounds reads and writes. Each patch adds a Sample parsing regression test that checks rejected records do not modify data past the declared event. Signed-off-by: Mark Amirkan --- Changes in v2: - Add the adjacent PERF_SAMPLE_RAW fix found during v1 review. - Keep the branch-stack fix unchanged. - Link to v1: https://patch.msgid.link/20260903-sympwn-linux-002-final-v2-v1-1-7c6e4166b814@gmail.com To: Peter Zijlstra To: Ingo Molnar To: Arnaldo Carvalho de Melo To: Namhyung Kim To: Mark Rutland To: Alexander Shishkin To: Jiri Olsa To: Ian Rogers To: Adrian Hunter To: James Clark Cc: linux-perf-users@vger.kernel.org Cc: linux-kernel@vger.kernel.org --- Mark Amirkan (2): perf evsel: Validate branch stack before byte swapping perf evsel: Validate RAW sample before byte swapping tools/perf/tests/sample-parsing.c | 109 ++++++++++++++++++++++++++++++++++++++ tools/perf/util/evsel.c | 20 +++---- 2 files changed, 120 insertions(+), 9 deletions(-) --- base-commit: aadea57f532882d8bab444646863c7ef8a778ff1 change-id: 20260903-sympwn-linux-002-final-v2-e30a8df210c1 Best regards, -- Mark Amirkan