Message ID | 20221128202741.4945-1-philmd@linaro.org |
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Mon, 28 Nov 2022 12:27:43 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= <philmd@linaro.org> To: qemu-devel@nongnu.org, =?utf-8?q?Marc-Andr=C3=A9_Lureau?= <marcandre.lureau@redhat.com> Cc: Alexander Bulekov <alxndr@bu.edu>, Paolo Bonzini <pbonzini@redhat.com>, Gerd Hoffmann <kraxel@redhat.com>, Peter Maydell <peter.maydell@linaro.org>, Mauro Matteo Cascella <mcascell@redhat.com>, =?utf-8?q?Philippe_Mathieu-Dau?= =?utf-8?q?d=C3=A9?= <philmd@linaro.org> Subject: [RFC PATCH-for-7.2 v3 0/5] hw/display/qxl: Avoid buffer overrun in qxl_phys2virt() Date: Mon, 28 Nov 2022 21:27:36 +0100 Message-Id: <20221128202741.4945-1-philmd@linaro.org> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::333; envelope-from=philmd@linaro.org; helo=mail-wm1-x333.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: <qemu-devel.nongnu.org> List-Unsubscribe: <https://lists.nongnu.org/mailman/options/qemu-devel>, <mailto:qemu-devel-request@nongnu.org?subject=unsubscribe> List-Archive: <https://lists.nongnu.org/archive/html/qemu-devel> List-Post: <mailto:qemu-devel@nongnu.org> List-Help: <mailto:qemu-devel-request@nongnu.org?subject=help> List-Subscribe: <https://lists.nongnu.org/mailman/listinfo/qemu-devel>, <mailto:qemu-devel-request@nongnu.org?subject=subscribe> Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org |
Series |
hw/display/qxl: Avoid buffer overrun in qxl_phys2virt()
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On Mon, 28 Nov 2022 at 15:30, Philippe Mathieu-Daudé <philmd@linaro.org> wrote: > > Since v2: > - Do not abort checking guest-provided addresses (Stefan) > - Handle chunked QEMUCursor (Gerd) > > Since v1: > - Moved overrun check in qxl_get_check_slot_offset (Marc-André) > > memory_region_get_ram_ptr() returns a host pointer for a > MemoryRegion. Sometimes we do offset calculation using this > pointer without checking the underlying MemoryRegion size. > > Wenxu Yin reported a buffer overrun in QXL. This series > aims to fix it. I haven't audited the other _get_ram_ptr() > uses (yet). Eventually we could rename it _get_ram_ptr_unsafe > and add a safer helper which checks for overrun. > > Worth considering for 7.2? Merged, thanks! Stefan