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b=CpSLXLHbGRLPeTML/GpXxwz56/9Wbv/Y6VvySDrUq7EnJTdeIi+8f4XVPJyjdRAfrrD4gv NWW8c+Gj2Z3AFJAw== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 376751365E; Wed, 9 Sep 2026 08:58:32 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id 6DhBDLgfoWoVUQAAD6G6ig (envelope-from ); Wed, 09 Sep 2026 08:58:32 +0000 From: Thomas Zimmermann To: jfalempe@redhat.com, javierm@redhat.com, airlied@gmail.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org, geert@linux-m68k.org, rdunlap@infradead.org Cc: dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, amd-gfx@lists.freedesktop.org, rust-for-linux@vger.kernel.org, linux-hyperv@vger.kernel.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, nouveau@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, virtualization@lists.linux.dev, sashiko-reviews@lists.linux.dev, Thomas Zimmermann , stable@vger.kernel.org Subject: [PATCH v4 01/14] drm/panic: Do not use un-escaped URL as format string Date: Wed, 9 Sep 2026 10:55:16 +0200 Message-ID: <20260909085826.64529-2-tzimmermann@suse.de> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260909085826.64529-1-tzimmermann@suse.de> References: <20260909085826.64529-1-tzimmermann@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spamd-Result: default: False [-2.80 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; RCVD_VIA_SMTP_AUTH(0.00)[]; TO_DN_SOME(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_TO(0.00)[redhat.com,gmail.com,linux.intel.com,kernel.org,linux-m68k.org,infradead.org]; RCPT_COUNT_TWELVE(0.00)[22]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; URIBL_BLOCKED(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:mid,suse.de:email,lists.freedesktop.org:email]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; R_RATELIMIT(0.00)[to_ip_from(RLhthb38qh1ntkuzcrgoc19dwi)]; RCVD_TLS_ALL(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,suse.de:mid,suse.de:email]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com] X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Replace the direct use of DRM_PANIC_SCREEN_QR_CODE_URL in snprintf() with a %s conversion specifier. Avoids a possible vulnerabilty from a crafted URL string. As the attacker needs to control the kernel at the Kconfig level, the potential for an exploit is likely low. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Fixes: cb5164ac43d0 ("drm/panic: Add a QR code panic screen") Cc: Javier Martinez Canillas Cc: Jocelyn Falempe Cc: dri-devel@lists.freedesktop.org Cc: # v6.12+ --- drivers/gpu/drm/drm_panic.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c index e576c4791861..ba21df4be338 100644 --- a/drivers/gpu/drm/drm_panic.c +++ b/drivers/gpu/drm/drm_panic.c @@ -658,7 +658,8 @@ static int drm_panic_get_qr_code_url(u8 **qr_image) char *kmsg; int max_qr_data_size, url_len; - url_len = snprintf(url, sizeof(url), CONFIG_DRM_PANIC_SCREEN_QR_CODE_URL "?a=%s&v=%s&z=", + url_len = snprintf(url, sizeof(url), "%s?a=%s&v=%s&z=", + CONFIG_DRM_PANIC_SCREEN_QR_CODE_URL, utsname()->machine, utsname()->release); max_qr_data_size = drm_panic_qr_max_data_size(panic_qr_version, url_len); -- 2.55.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id DA230C88E54 for ; 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no-senders; approved; emergency; loop; banned-address CC: dri-devel@lists.freedesktop.org, linux-doc@vger.kernel.org, amd-gfx@lists.freedesktop.org, rust-for-linux@vger.kernel.org, linux-hyperv@vger.kernel.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, nouveau@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, virtualization@lists.linux.dev, sashiko-reviews@lists.linux.dev, stable@vger.kernel.org X-Mailman-Version: 3.3.8 Precedence: list List-Id: Nouveau development list Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Replace the direct use of DRM_PANIC_SCREEN_QR_CODE_URL in snprintf() with a %s conversion specifier. Avoids a possible vulnerabilty from a crafted URL string. As the attacker needs to control the kernel at the Kconfig level, the potential for an exploit is likely low. Signed-off-by: Thomas Zimmermann Reviewed-by: Jocelyn Falempe Fixes: cb5164ac43d0 ("drm/panic: Add a QR code panic screen") Cc: Javier Martinez Canillas Cc: Jocelyn Falempe Cc: dri-devel@lists.freedesktop.org Cc: # v6.12+ --- drivers/gpu/drm/drm_panic.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_panic.c b/drivers/gpu/drm/drm_panic.c index e576c4791861..ba21df4be338 100644 --- a/drivers/gpu/drm/drm_panic.c +++ b/drivers/gpu/drm/drm_panic.c @@ -658,7 +658,8 @@ static int drm_panic_get_qr_code_url(u8 **qr_image) char *kmsg; int max_qr_data_size, url_len; - url_len = snprintf(url, sizeof(url), CONFIG_DRM_PANIC_SCREEN_QR_CODE_URL "?a=%s&v=%s&z=", + url_len = snprintf(url, sizeof(url), "%s?a=%s&v=%s&z=", + CONFIG_DRM_PANIC_SCREEN_QR_CODE_URL, utsname()->machine, utsname()->release); max_qr_data_size = drm_panic_qr_max_data_size(panic_qr_version, url_len); -- 2.55.0