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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1756928309; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=7ViEPDnqnaUJlWIvLFiXQ+Pg2yfwJuliieVyNpBRLGw=; b=Pw2hIPxRLYaBYB0k8xH73qEMHWtfdNDLLIaXMwmCGJSAUz7AkC493gfImKPUFLoQ2YEbUZ bULWf1bT49hC2+T9lUAy7nTo87lhflL9iKMlsGXjmY8N+lTypEXIMAqitfWmYJ1QoFpaj/ H08Sqd/mDf3LxkJspS6Xyg2tSEFs87Q= X-MC-Unique: d48-mJJdPiyPR46cz8U4eg-1 X-Mimecast-MFC-AGG-ID: d48-mJJdPiyPR46cz8U4eg_1756928305 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= Subject: [PATCH] ui/spice: fix crash when disabling GL scanout on Date: Wed, 3 Sep 2025 23:38:18 +0400 Message-ID: <20250903193818.2460914-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 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=170.10.133.124; envelope-from=marcandre.lureau@redhat.com; helo=us-smtp-delivery-124.mimecast.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, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-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: 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 @redhat.com) X-ZM-MESSAGEID: 1756928399302124100 From: Marc-Andr=C3=A9 Lureau When spice_qxl_gl_scanout2() isn't available, the fallback code incorrectly handles NULL arguments to disable the scanout, leading to: Program terminated with signal SIGSEGV, Segmentation fault. #0 spice_server_gl_scanout (qxl=3D0x55a25ce57ae8, fd=3D0x0, width=3D0, hei= ght=3D0, offset=3D0x0, stride=3D0x0, num_planes=3D0, format=3D0, modifier= =3D72057594037927935, y_0_top=3D0) at ../ui/spice-display.c:983 983 if (num_planes <=3D 1) { Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=3D2391334 Fixes: 98a050ca93afd8 ("ui/spice: support multi plane dmabuf scanout") Signed-off-by: Marc-Andr=C3=A9 Lureau --- ui/spice-display.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/ui/spice-display.c b/ui/spice-display.c index 669832c561..db71e866f8 100644 --- a/ui/spice-display.c +++ b/ui/spice-display.c @@ -980,7 +980,9 @@ static void spice_server_gl_scanout(QXLInstance *qxl, spice_qxl_gl_scanout2(qxl, fd, width, height, offset, stride, num_planes, format, modifier, y_0_top); #else - if (num_planes <=3D 1) { + if (fd =3D=3D NULL) { + spice_qxl_gl_scanout(qxl, -1, 0, 0, 0, 0, false); + } else if (num_planes <=3D 1) { spice_qxl_gl_scanout(qxl, fd[0], width, height, stride[0], format,= y_0_top); } else { error_report("SPICE server does not support multi plane GL scanout= "); --=20 2.51.0