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bh=TexKsOB/m5ww6iBN9k0jVR9Z5fLzd2GGDypDU4iooE4=; b=EOUwzoTwYkYZ8gNsQfNH4R13kNVtAwbCIJjA/o58RHv283RAdj7W+okV3+Mu6Y0aJxtIwN n3SirGYJjnRr6J0pahexqST8a5015Bmhy2FhslQ97+v/xQ1MnR77dFDIB7MpJKoHZmf2v2 GxSOjK/yKfsfhOsAIK3yxLsPqg7IsnU= X-MC-Unique: IoKXVtzvNLqLMk9B4Uskkg-1 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Subject: [PULL 10/11] sockets: Bypass "replace empty @path" for abstract unix sockets Date: Tue, 3 Nov 2020 14:02:24 +0000 Message-Id: <20201103140225.496776-11-berrange@redhat.com> In-Reply-To: <20201103140225.496776-1-berrange@redhat.com> References: <20201103140225.496776-1-berrange@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=berrange@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" 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=216.205.24.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/03 00:03:41 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] 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, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Markus Armbruster , Gerd Hoffmann , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Paolo Bonzini Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) From: Markus Armbruster unix_listen_saddr() replaces empty @path by unique value. It obtains the value by creating and deleting a unique temporary file with mkstemp(). This is racy, as the comment explains. It's also entirely undocumented as far as I can tell. Goes back to commit d247d25f18 "sockets: helper functions for qemu (Gerd Hoffman)", v0.10.0. Since abstract socket addresses have no connection with filesystem pathnames, making them up with mkstemp() seems inappropriate. Bypass the replacement of empty @path. Reviewed-by: Eric Blake Reviewed-by: Paolo Bonzini Signed-off-by: Markus Armbruster Signed-off-by: Daniel P. Berrang=C3=A9 --- util/qemu-sockets.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c index a578c434c2..671717499f 100644 --- a/util/qemu-sockets.c +++ b/util/qemu-sockets.c @@ -877,7 +877,7 @@ static int unix_listen_saddr(UnixSocketAddress *saddr, return -1; } =20 - if (saddr->path && saddr->path[0]) { + if (saddr->path[0] || saddr->abstract) { path =3D saddr->path; } else { const char *tmpdir =3D getenv("TMPDIR"); --=20 2.28.0