From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtpbguseast1.qq.com (smtpbguseast1.qq.com [54.204.34.129]) (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 E5A9D308F15 for ; Sun, 10 May 2026 22:33:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.204.34.129 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778452418; cv=none; b=r+XT2VstkX+9QfA3IfZgW61pE1fh30HdBVlM+tY9gLBAGHkR1cpGogfSBKCr2pqIP+uoxKvEKrI3oudKG9BvPW4DRyF6Qw00gBdACmsSXs/YOdoxmuJ/XoSPsfTzeemn5Asz9SLCRWsC6eNwbNSWMEeMr35N66xUm7YMHpZrtds= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778452418; c=relaxed/simple; bh=rvSqfPe31RmxHaiDt4N/xBs9n4hl2UED7B0sKqVsQUA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=eTeM7mpZ10jiJoxgKcZf7RsOELh/v69uAtmQQoRi69pbYNDZSnXtrhzo/QH0myGlAx/MWLYCzGEu+qoQcl0RaxYZ9nUcOQb4J9EQCtZ9PEnwm2RcXktPWzGAeeLaJPVoIYhpy03zlJPf08yJv6iLnq5l+DmKMGzu63d7nMQaIrs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com; spf=pass smtp.mailfrom=uniontech.com; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b=Cuvnw9GA; arc=none smtp.client-ip=54.204.34.129 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=uniontech.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=uniontech.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=uniontech.com header.i=@uniontech.com header.b="Cuvnw9GA" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=uniontech.com; s=onoh2408; t=1778452340; bh=BkVxM+S5/CQD2rR4IzyjcThauNt8i+gz+BoPHv4JZfA=; h=From:To:Subject:Date:Message-Id:MIME-Version; b=Cuvnw9GAN50u6+Fl+lTYiQs5vbqKdjixoWCuGKkzWqHj2LY0mUT33XGAgdeQY/43i 70xNwFoYg3I71VfSC+xB3qog+dg5rutJ7VPnr2I5k5f8qPlRXjPMGo9gvxykEjm9BU Kn16dOfXkx+1t43MNcjlAzyUhzZGvG9K1DcEWqH0= X-QQ-mid: zesmtpip3t1778452334tf99433d2 X-QQ-Originating-IP: 6sNBMD12FGonFJIJzjd+CncC8qH7mueGPtwrJ2A/sss= Received: from localhost.localdomain ( [localhost]) by bizesmtp.qq.com (ESMTP) with id ; Mon, 11 May 2026 06:32:12 +0800 (CST) X-QQ-SSF: 0000000000000000000000000000000 X-QQ-GoodBg: 1 X-BIZMAIL-ID: 3703982739077470885 EX-QQ-RecipientCnt: 11 From: Wentao Guan To: jaltman@auristor.com Cc: dhowells@redhat.com, gregkh@linuxfoundation.org, guanwentao@uniontech.com, horms@kernel.org, kuba@kernel.org, linux-afs@lists.infradead.org, marc.dionne@auristor.com, sashal@kernel.org, stable@kernel.org, stable@vger.kernel.org Subject: Re: Backport RXRPC for 6.1.y from 6.2 Date: Mon, 11 May 2026 06:30:57 +0800 Message-Id: <20260510223057.6945-1-guanwentao@uniontech.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-QQ-SENDSIZE: 520 Feedback-ID: zesmtpip:uniontech.com:qybglogicsvrgz:qybglogicsvrgz3a-0 X-QQ-XMAILINFO: OYKM/pSuXZktyvI1Cr5T0vJh8neaOk7McnCXH/R2FXe/EuvKmuZcy0Fp N5XFoW2Y4ymRmsJSw6mDLwt1lumzieUwSoG9pQqIPWUCTaP6AO4hcu3P52Gth3gCH3qkshP Y8P/TfQW0zWtfXVHLAwIHG5dATWOOq5h5XAxzGDB/FPk9Q9znT9BaffXR6JRn+XfDJD9yX1 FbjHkJ1yN//h9Af96RfvJzskpMjOfw+2x7pyFWW6s7o4cwbQpWHphB5mZ67VCZ4zjECpFN/ wNL+RF27weJpM/ORrTI+l4HBjrZP7DuIl3608CgGYNwgMMXpNGfYRpCjUCmm3ZdZhEMtiiA /D5zEaFGxz6b9IYhdc1VnD6e0lG75HyRcjzq8tP5uSvbteTOXYuopU4B1DI5Ovz6QMc+F7g Ne1GgqolQQNKtKWLB9KV9aXaBHlyzCm13iD1+WRm+ti7uUM6vj2VqygAO8JGnc9wdYtFJRV G02XecMrtTGydpvdmChLmd26M3MZTpfVZp01dSVJUQ5Jz0OMGTlI95dqT/uSzVzyTGx7BxL 07MK7NA/l4m2tcTKmVCPnWohoOGBixyWW4Gdb2CZXYUdJCg4bqcOsuqUwbqKMkL/sY0zsSC uAz0vsp4PDBGAE7qVgUwslXlA/6EmC3WGt1kn1dI9cEMWemLj3bCmzFhpXmBLMeKeM/k6NO ydEXiKsZVgda5+Sb8eU00B6M6hWrhczckC/6aWeyLq9feMrkTlKAEoEYzHr+l071zvZ2/7Z oFb/ZrMhLatLCjg2HT4P+02QHHng3xFADM2G/YWAq/QlL90q48jQdXymF+nnYFK3SQEg/+n gZdsPRsZ2Zm8PdF/Q4uC+dSLh23VX6GUwa1EWqwNo6APCGkjn2rgoLU8TMFJgh3j6d3kBLl HqRxH/0HV+Ii8oZebY2GcJjdRlGaURHDFma/5zqO4cOdUAn2OYqjXCxsb9CS2FTFL9oPNLW 4PkqUefsEKbK+04IeTWgwcNDmT32hk+1VuSUAAO7sFygAV6jEqzpTOYu14XinpGqM92lg6l D2vvKstRIZrczAeFT/9R/nmZLO7B4qetv2o9zhBeHvwu5EGwDVbI8TXA5SQ/hYE3wvLC1lH g== X-QQ-XMRINFO: OD9hHCdaPRBwH5bRRRw8tsiH4UAatJqXfg== X-QQ-RECHKSPAM: 0 FYI, I am bisecting v6.1.73(poc fail) and v6.1.70(poc ok): ac8c69e448f7e43586e102395844a117b0595031 is the first bad commit commit ac8c69e448f7e43586e102395844a117b0595031 (HEAD) Author: David Howells Date: Mon May 22 13:11:22 2023 +0100 udp: Convert udp_sendpage() to use MSG_SPLICE_PAGES [ Upstream commit 7ac7c987850c3ec617c778f7bd871804dc1c648d ] Convert udp_sendpage() to use sendmsg() with MSG_SPLICE_PAGES rather than directly splicing in the pages itself. This allows ->sendpage() to be replaced by something that can handle multiple multipage folios in a single transaction. Signed-off-by: David Howells cc: Willem de Bruijn cc: David Ahern cc: Jens Axboe cc: Matthew Wilcox Signed-off-by: Jakub Kicinski Stable-dep-of: a0002127cd74 ("udp: move udp->no_check6_tx to udp->udp_flags") Signed-off-by: Sasha Levin net/ipv4/udp.c | 51 ++++++--------------------------------------------- 1 file changed, 6 insertions(+), 45 deletions(-) so if the 6.1.y kernel convert to full MSG_SPLICE_PAGES will be vulnerable. BRs Wentao Guan