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[34.127.51.67]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-87d1dad44c6sm2393739b3a.42.2026.09.24.00.39.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Sep 2026 00:39:21 -0700 (PDT) From: Hui Peng To: al@alarsen.net Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, matthias.goergens@gmail.com, Hui Peng Subject: [PATCH v3 0/6] fs/qnx6: fix buffer head leaks, double free, and inode validation Date: Thu, 24 Sep 2026 07:39:13 +0000 Message-ID: <20260924073920.2782917-1-benquike@gmail.com> X-Mailer: git-send-email 2.56.0.rc1.310.g51773c2048-goog In-Reply-To: <20260921042511.1473629-1-benquike@gmail.com> References: <20260921042511.1473629-1-benquike@gmail.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series addresses buffer head leaks, a double brelse(), and bounds-check failures in the qnx6 filesystem driver: 1. Validate di_filelevels <= QNX6_PTR_MAX_LEVELS in qnx6_iget() before accessing inode level pointers to prevent array bounds overflow. 2. Release bh via brelse() on error path in qnx6_block_map(). 3. Avoid double brelse(sb_buf) on error path in qnx6_fill_super(). 4. Release sb_buf on mmi_fs error path in qnx6_fill_super() when probing MMI superblocks. 5. Abort mount on superblock magic mismatch when silent is set. 6. Validate sb_blocksize before dividing in qnx6_mmi_fill_super() to prevent divide-by-zero. Changes in v3: - Add Tested-by and Reviewed-by tags from Matthias Goergens across all patches in the series. Changes in v2: - Split into a 6-patch series as requested by maintainer review. Hui Peng (6): qnx6: validate di_filelevels in qnx6_iget() before accessing level pointers qnx6: release bh on error path in qnx6_block_map() qnx6: avoid double brelse() on error path in qnx6_fill_super() qnx6: release sb_buf on mmi_fs error path in qnx6_fill_super() qnx6: abort mount on superblock magic mismatch when silent is set qnx6: validate sb_blocksize before dividing in qnx6_mmi_fill_super() fs/qnx6/inode.c | 26 +++++++++++++++++++++----- fs/qnx6/namei.c | 5 ++++- 2 files changed, 25 insertions(+), 6 deletions(-)