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Thu, 06 Aug 2026 01:50:50 -0700 (PDT) Received: from runnervmvrwv9.cuzdzfniafce3lfcelrvp0oleh.phxx.internal.cloudapp.net ([20.169.98.210]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3158673b7b2sm26163351eec.19.2026.08.06.01.50.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 06 Aug 2026 01:50:50 -0700 (PDT) From: linuxtestproject.agent@gmail.com To: Andrea Cervesato Date: Thu, 6 Aug 2026 08:50:49 +0000 Message-ID: <20260806085049.22237-1-linuxtestproject.agent@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260801-cve-2026-64600-v5-1-2b9e0d5277e4@suse.com> References: <20260801-cve-2026-64600-v5-1-2b9e0d5277e4@suse.com> MIME-Version: 1.0 X-Virus-Scanned: clamav-milter 1.0.9 at in-7.smtp.seeweb.it X-Virus-Status: Clean Subject: Re: [LTP] cve: reproducer for cve-2026-64600 X-BeenThere: ltp@lists.linux.it X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux Test Project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ltp@lists.linux.it Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-bounces+ltp=archiver.kernel.org@lists.linux.it Sender: "ltp" Hi Andrea, On August 1, 2026, Andrea Cervesato wrote: > cve: reproducer for cve-2026-64600 > struct stat sb; > > SAFE_STAT(".", &sb); > blksize = sb.st_blksize; Could the I/O size and alignment be derived from MNTPOINT or TARGET instead? The framework mounts XFS at MNTPOINT but leaves "." on the surrounding temporary filesystem, whose block size can differ from that of XFS. For example, with a 1 KiB host filesystem and a 4 KiB XFS filesystem, these writes are not XFS-block-aligned. xfs_file_dio_write_unaligned() returns -ENOTBLK for the reflinked file, and xfs_file_write_iter() silently retries the operation as buffered I/O. SAFE_PWRITE() still succeeds, but the test can then report TPASS without exercising xfs_direct_write_iomap_begin() or the target race. Verdict - Needs revision --- Note: The agent can sometimes produce false positives although often its findings are genuine. If you find issues with the review, please comment this email or ignore the suggestions. Regards, LTP AI Reviewer -- Mailing list info: https://lists.linux.it/listinfo/ltp