From nobody Sun Feb 8 23:41:58 2026 Received: from mail.crpt.ru (mail.crpt.ru [91.236.205.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 714882C11C4; Tue, 23 Dec 2025 06:31:53 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=91.236.205.1 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766471520; cv=none; b=mmKgB1lPDuU6BgdFRVEdouVgpPxVpSpNqmi+aLGZc41HmCl4UFoGNuDUBZEttOVIG4/6ypO4YA3XfEXW5mZWdf8jPcUSE4OkQUzcPdx26nWFXNI9o8WzJsy9maHdHCYKgklHYgFQx88oh8skz2/lhhCL/gr3dIKtr08WhtruRLc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1766471520; c=relaxed/simple; bh=uIyoHWdWNu6d1ClWbNYZx1UJseEfMekq0zayGia+/zg=; h=From:To:CC:Subject:Date:Message-ID:Content-Type:MIME-Version; b=tzQ/xDhIoUx7ZhyVa6PipiK0pD3qeZEnkTOabhNvTdTBdR1jSqFAP+1p1DtBY0SL37sWU8KJVTjYz8t/6n1tv89u2OIWneDt9QIs52fFmUwTEsyTy35ax7Iv2UJEuIAeAXgwxCniTsjsmHWasg80eNQXwcLrdmx95fysVAhGXdA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=crpt.ru; spf=pass smtp.mailfrom=crpt.ru; dkim=pass (2048-bit key) header.d=crpt.ru header.i=@crpt.ru header.b=lA39fu/B; arc=none smtp.client-ip=91.236.205.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=crpt.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=crpt.ru Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=crpt.ru header.i=@crpt.ru header.b="lA39fu/B" Received: from mail.crpt.ru ([192.168.60.4]) by mail.crpt.ru with ESMTPS id 5BN6V7ol026179-5BN6V7on026179 (version=TLSv1.2 cipher=AES256-SHA256 bits=256 verify=OK); Tue, 23 Dec 2025 09:31:07 +0300 Received: from EX2.crpt.local (192.168.60.4) by ex2.crpt.local (192.168.60.4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.44; Tue, 23 Dec 2025 09:31:06 +0300 Received: from EX2.crpt.local ([192.168.60.4]) by EX2.crpt.local ([192.168.60.4]) with mapi id 15.01.2507.044; Tue, 23 Dec 2025 09:31:06 +0300 From: =?koi8-r?B?98HUz9LP0MnOIOHOxNLFyg==?= To: Bartlomiej Zolnierkiewicz CC: =?koi8-r?B?98HUz9LP0MnOIOHOxNLFyg==?= , "Thomas Zimmermann" , Greg Kroah-Hartman , Samasth Norway Ananda , Zsolt Kajtar , "Lucas De Marchi" , "Antonino A. Daplas" , Andrew Morton , "dri-devel@lists.freedesktop.org" , "linux-fbdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "lvc-project@linuxtesting.org" , "stable@vger.kernel.org" Subject: [PATCH 5.10] fbcon: Add check for return value Thread-Topic: [PATCH 5.10] fbcon: Add check for return value Thread-Index: AQHcc9W32zQUeRD9Y0S9vQt0S50zYg== Date: Tue, 23 Dec 2025 06:31:06 +0000 Message-ID: <20251223063055.77545-1-a.vatoropin@crpt.ru> Accept-Language: ru-RU, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-kse-serverinfo: EX2.crpt.local, 9 x-kse-antivirus-interceptor-info: scan successful x-kse-antivirus-info: Clean, bases: 12/22/2025 10:06:00 PM x-kse-attachment-filter-triggered-rules: Clean x-kse-attachment-filter-triggered-filters: Clean x-kse-bulkmessagesfiltering-scan-result: protection disabled Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-FEAS-BEC-Info: 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 X-FEAS-Client-IP: 192.168.60.4 X-FE-Policy-ID: 2:4:0:SYSTEM DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; d=crpt.ru; s=crpt.ru; c=relaxed/relaxed; h=from:to:cc:subject:date:message-id:content-type:mime-version; bh=NmXWo8cqnFNX78iJ5OKHOK6zwMhrZ7kh7/MERegNA/g=; b=lA39fu/BqQS/xZVIKnQL+bzgWvxLLD+qKKh8hSbRK62x1rAjm+mP3xZRoEjD3futJ2e2dADCuQKt wlUoYWm1b8opOQ5SiAaPRv57OfJt4wpgCDuaKC5IvFffkb5cDzZS0t8ryXjMvl9YyYx8o7Iiyo2g D9pku7j8FM7HbfLeGAlwzUKJxAgSvgnvqSxLIOWIy1SOdyNEK+/lXJKPK6//xNT7z4tKTwECs7fg V5zRKCs8PP4VCIbvRddkLF+J7uoWeq6Qy2gCat8CnBFRKGTv2DZKC8OLTr5pZiOr2z3pSvduTJGK xyhbLWatUT1YzZ+pMc+nc/VCVXc208yF3/jxQg== Content-Type: text/plain; charset="utf-8" From: Andrey Vatoropin If fbcon_open() fails when called from con2fb_acquire_newinfo() then info->fbcon_par pointer remains NULL which is later dereferenced. Add check for return value of the function con2fb_acquire_newinfo() to avoid it. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: d1baa4ffa677 ("fbcon: set_con2fb_map fixes") Cc: stable@vger.kernel.org Signed-off-by: Andrey Vatoropin --- drivers/video/fbdev/core/fbcon.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/video/fbdev/core/fbcon.c b/drivers/video/fbdev/core/fb= con.c index 3dd03e02bf97..d9b2b54f00db 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -1057,7 +1057,8 @@ static void fbcon_init(struct vc_data *vc, int init) return; =20 if (!info->fbcon_par) - con2fb_acquire_newinfo(vc, info, vc->vc_num, -1); + if (con2fb_acquire_newinfo(vc, info, vc->vc_num, -1)) + return; =20 /* If we are not the first console on this fb, copy the font from that console */ --=20 2.43.0