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Tsirkin" Subject: [PATCH v2 3/8] libvhost-user.c: add assertion to vu_message_read_default Date: Tue, 26 Sep 2023 23:15:27 +0300 Message-Id: <20230926201532.221152-4-vsementsov@yandex-team.ru> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230926201532.221152-1-vsementsov@yandex-team.ru> References: <20230926201532.221152-1-vsementsov@yandex-team.ru> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a02:6b8:c03:500:1:45:d181:df01; envelope-from=vsementsov@yandex-team.ru; helo=forwardcorp1c.mail.yandex.net 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, 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 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @yandex-team.ru) X-ZM-MESSAGEID: 1695759450395100010 Content-Type: text/plain; charset="utf-8" Explain Coverity that we are not going to overflow vmsg->fds. Signed-off-by: Vladimir Sementsov-Ogievskiy --- subprojects/libvhost-user/libvhost-user.c | 1 + 1 file changed, 1 insertion(+) diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvho= st-user/libvhost-user.c index 0469a50101..49b57c7ef4 100644 --- a/subprojects/libvhost-user/libvhost-user.c +++ b/subprojects/libvhost-user/libvhost-user.c @@ -322,6 +322,7 @@ vu_message_read_default(VuDev *dev, int conn_fd, VhostU= serMsg *vmsg) if (cmsg->cmsg_level =3D=3D SOL_SOCKET && cmsg->cmsg_type =3D=3D S= CM_RIGHTS) { fd_size =3D cmsg->cmsg_len - CMSG_LEN(0); vmsg->fd_num =3D fd_size / sizeof(int); + assert(fd_size < VHOST_MEMORY_BASELINE_NREGIONS); memcpy(vmsg->fds, CMSG_DATA(cmsg), fd_size); break; } --=20 2.34.1