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Wed, 27 May 2026 07:16:05 -0700 (PDT) From: Cunlong Li To: Sergey Senozhatsky Cc: Minchan Kim , Jens Axboe , Andrew Morton , Christoph Hellwig , linux-block@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v2 0/2] zram: fix UAF in zram_bvec_write_partial() and drop dead bio plumbing Date: Wed, 27 May 2026 22:15:59 +0800 Message-Id: X-Mailer: git-send-email 2.30.2 In-Reply-To: References: <20260527-zram-v2-0-2fb84b054b5c@gmail.com> Mail-Followup-To: Cunlong Li , Sergey Senozhatsky , Minchan Kim , Jens Axboe , Andrew Morton , Christoph Hellwig , linux-block@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: 8bit On Wed, May 27, 2026 at 04:21:53PM +0900, Sergey Senozhatsky wrote: > On (26/05/27 12:49), Cunlong Li wrote: > > 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. > > Did you test it? Compile-tested only so far; I haven't had a chance to run a PAGE_SIZE > 4K reproducer yet. Thanks for the review. > > Looks reasonable (unless I'm missing something): > Reviewed-by: Sergey Senozhatsky