From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6BC9BCD4F54 for ; Wed, 27 May 2026 04:49:34 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 46DD56B0005; Wed, 27 May 2026 00:49:33 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 41E8D6B008A; Wed, 27 May 2026 00:49:33 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 30D846B008C; Wed, 27 May 2026 00:49:33 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 1A46D6B0005 for ; Wed, 27 May 2026 00:49:33 -0400 (EDT) Received: from smtpin09.hostedemail.com (lb01a-stub [10.200.18.249]) by unirelay05.hostedemail.com (Postfix) with ESMTP id 9F1F040311 for ; Wed, 27 May 2026 04:49:32 +0000 (UTC) X-FDA: 84811971384.09.F55E173 Received: from mail-pl1-f182.google.com (mail-pl1-f182.google.com [209.85.214.182]) by imf14.hostedemail.com (Postfix) with ESMTP id 99B5110000B for ; Wed, 27 May 2026 04:49:30 +0000 (UTC) Authentication-Results: imf14.hostedemail.com; dkim=pass header.d=gmail.com header.s=20251104 header.b=rBZdOWez; spf=pass (imf14.hostedemail.com: domain of shenxiaogll@gmail.com designates 209.85.214.182 as permitted sender) smtp.mailfrom=shenxiaogll@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1779857370; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding:in-reply-to: references:dkim-signature; bh=DtWoDaWr1fAVpczHdMCywjJZwwAcuUUA2TuUPYOhsgk=; b=ZTkeLY9Av33vBnTt9tITpI4Pki8onT8hI8Up4ElhemVozmUaOpQZ5xRWgmrt5+/d3Nxbjj RPblQbywOks+H6pEIwAkmXePctjD9gzfppTjcwu82bRy7qh189Jo2RAnzcQrzqN3uL4ZJM ShWIu50m+ZnQY1DCXNAwjA0PcAZ/cds= ARC-Authentication-Results: i=1; imf14.hostedemail.com; dkim=pass header.d=gmail.com header.s=20251104 header.b=rBZdOWez; spf=pass (imf14.hostedemail.com: domain of shenxiaogll@gmail.com designates 209.85.214.182 as permitted sender) smtp.mailfrom=shenxiaogll@gmail.com; dmarc=pass (policy=none) header.from=gmail.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1779857370; a=rsa-sha256; cv=none; b=ixW1vO+/PvlSvctJXPH2rGi+uIvfjQfXCWcq0zyV2tcRUew5O+R3JBUnuzA9RivcHpDzf8 n9eo/YvAmBo39ytILwdYtneuywYwmTleNTqt6Puy+xnNuf0uRRPvnhxIDG2vQJODIfg+mP 6Be3neZ3BhlaY2gn6I3aATQEX2fKdzw= Received: by mail-pl1-f182.google.com with SMTP id d9443c01a7336-2ba4efedbeaso85341515ad.1 for ; Tue, 26 May 2026 21:49:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1779857369; x=1780462169; darn=kvack.org; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:from:to:cc:subject:date:message-id:reply-to; bh=DtWoDaWr1fAVpczHdMCywjJZwwAcuUUA2TuUPYOhsgk=; b=rBZdOWez5mFEqleNHT+czVm08jhSSf+OTiSarKdYB4jp2rtBBdNLPzbWeZCp0m13eh 6xDozkOIjwBQruZCoMCp7LXpxIgoyiSqI2DEUW3ihP5JhAf0zSFjXm+D2UQHDsmtfLAi cZZG+f/xs4DXLQ5vtxIkEm1LSnOFPeR9CfmvSBRHbDCMeUTmGWTmMlcI2kot1h32Vlsr 51hBubyvXTNjTzi3PZVuHX0PJZIsXtPBUeaX2tNSeRDRza628GIli4+7jskasT4KnUfR 2IbEBuLzyoLaY0LInXy4O6IDOyaXbVg0cknc2DbiJpO8KRTSLqUElMa5l2x4mTlFa2cH mTMg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1779857369; x=1780462169; h=cc:to:content-transfer-encoding:mime-version:message-id:date :subject:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=DtWoDaWr1fAVpczHdMCywjJZwwAcuUUA2TuUPYOhsgk=; b=eBcXIFsoIec3KFs6ctzMQtsY0GR8biv5Gnom41Llmhctr7tuOuS4EoFsn1XOkwgb4z GXC1xSptuEfwZ/lXzzgGhbZnCoqahRQo7f0vRi6WOgNoyTDjxAHdNtvKZsD1Y7DFIP49 0odkM/s/fQPm/5O1FHZHDb4gpg6zU/txbb2XeU5nw5oWgMUSC0AZZ6PWV5xPkPHC8T0L VjcR8ahtDzura5zqBiMSFnShGY3G+U32hy+yyX2VWJPnwLRxAHw/IwObyrYzjtodomKv yzJV3i3/t3TRldqiwkPIlx8KXhm75GTP85yhaDhOQF9DwvSFA8IPIPLvqT1RcoeuU6fN YALA== X-Forwarded-Encrypted: i=1; AFNElJ/LZm5pE4GsRE7NW6OQAR3TTrg5yikokpgQkiwQnNoY2a+MD5hAZuK7uIwXEPCGUvqY7iM4IMYc7A==@kvack.org X-Gm-Message-State: AOJu0Yx1/UXL9HgiVyv7vYUngI5I47hYIw3D8h1JlyUU6N2gAsKk7uWH JKDW86MB4K5Wh0eQ+urGFmdfUEebPS9qn88Au7QyVVouEsswtF/tNn1c X-Gm-Gg: Acq92OEaXjoEVMSz0QOjrlCGtdQtNE6JBZjJbE9mKeEUz6e3BCVPr8KKaybxQA52d8c nqSwJpTnHRfYgQpbiVFoj8wa04CAYaLUQkoPlnbmc8lPMgw8cMp21lzy+3AMVCask5AaAxQATb2 2mAPLqTox7LkIwIppXVB7XQUZm1TiDMj5T+pmP/NYCWTuGGA80iJff7QfaeREDLVQkBm1OTbFs/ yLL4uMbSMw3MCyEtHZKlz1efqFTephgt26ig0YIoH/pUV8h34r6wh68l+n57CuXVDd2XRhTmjQ5 taW9IUpTZNBEwzKjqXMdZu2kHBD1zNip/25h0oGeTAzyuhljO/wFbTR/jbweosWuejXZibbX/7s sbm/zHIc9y2K+2srq+GtpZX7NVNWq7jGtyrG/9E70p8aBFPGEK/Pdz+uQa5EN0RoppfQuB6edbB rm0Soqpo384xxDzyE/1ny5z47tHu1MFBWGSg== X-Received: by 2002:a17:903:1a2b:b0:2bd:ef12:14d6 with SMTP id d9443c01a7336-2beb06cfc33mr237395755ad.34.1779857369510; Tue, 26 May 2026 21:49:29 -0700 (PDT) Received: from [127.0.0.1] ([116.80.91.208]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2beb58dba7bsm135704105ad.66.2026.05.26.21.49.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 May 2026 21:49:28 -0700 (PDT) From: Cunlong Li Subject: [PATCH v2 0/2] zram: fix UAF in zram_bvec_write_partial() and drop dead bio plumbing Date: Wed, 27 May 2026 12:49:23 +0800 Message-Id: <20260527-zram-v2-0-2fb84b054b5c@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIANN3FmoC/zXMQQ7CIBCF4as0sxYDE0ujK+9hugAc2kmkGDBEb bi7WOPyf3n5VsiUmDKcuhUSFc4clxa468DNZplI8LU1oEQte9TinUwQVqoD9nYg7TS06z2R5+f GXMbWM+dHTK9NLeq7/oHhBxQllHCkjLNovfHH8xQM3/YuBhhrrR8t8VD0mAAAAA== X-Change-ID: 20260526-zram-b01425b7e6c6 To: Minchan Kim , Sergey Senozhatsky , Jens Axboe , Andrew Morton Cc: Christoph Hellwig , linux-block@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Cunlong Li , stable@vger.kernel.org X-Mailer: b4 0.14.3 X-Developer-Signature: v=1; a=ed25519-sha256; t=1779857366; l=1050; i=shenxiaogll@gmail.com; s=20260517; h=from:subject:message-id; bh=MWXxtYUJHKCFAwaYN7w+xkzs9tEH+b5cbl78IjB6IzQ=; b=awVJ3Reynx/9qKcpkry8pPVO6WO/SxEC+sbgYlB/AXjE7b9wokupd/75eZl2DJa0r9X5EKc89 efYJzuJECK2DHFqkFpgYD8dIqvHv2XslkX3RsXOW5OSU8b65Aik3V+A X-Developer-Key: i=shenxiaogll@gmail.com; a=ed25519; pk=SKFifnqPdsvsjuhUiq+Y9vtCdhyZ/LrRcfYn8eRq6AE= X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 99B5110000B X-Stat-Signature: f6p9q9yapn6scq3whddr9xng9nm4zz48 X-HE-Tag: 1779857370-362839 X-HE-Meta: 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 TcjTQS5i 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Patch 1 fixes a use-after-free in zram_bvec_write_partial() that happens on PAGE_SIZE > 4K configurations when a partial write hits a ZRAM_WB slot. Patch 2 is a follow-up cleanup that drops the now-unused bio parameter from zram_bvec_write_partial() and zram_bvec_write(), no functional change. Patch 1 is tagged for stable; patch 2 is not. Signed-off-by: Cunlong Li --- Changes in v2: - Add patch 2: drop the now-unused bio parameter from zram_bvec_write_partial() and zram_bvec_write(), per Sergey's suggestion on v1. - Link to v1: https://lore.kernel.org/r/20260527-zram-v1-1-ce1acb2bfaf9@gmail.com --- Cunlong Li (2): zram: fix use-after-free in zram_bvec_write_partial() zram: drop unused bio parameter from write helpers drivers/block/zram/zram_drv.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) --- base-commit: e8c2f9fdadee7cbc75134dc463c1e0d856d6e5c7 change-id: 20260526-zram-b01425b7e6c6 Best regards, -- Cunlong Li