From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 075FD30B53F; Mon, 13 Apr 2026 16:19:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097185; cv=none; b=T/AcS75ZPhEk4Wk/adOmN9r8FRuyCknvtVwvbSyK0/JaLDg1a0QK+6gnjFeQEPfZuT31feHuobgNZB6Ton3343yw0DQFUUy9yGaJzw1MAk6Re5yEW3RFb/zK7rSygGRwnsDR3edroCtqOxZLA8dCJ1mqNIE26qYH/IdE0bjLg0o= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776097185; c=relaxed/simple; bh=yUDHluQa83fTCOKpsDnPpefv6fFwI8VrNvCmyjTWeDk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hs9Dz81QMYPp9lG7Xl6A42CMvfgCLCGi0LhR/kb8FQj2Tm1DT6B3Cvlz8729x4XdpsiVKUQctGuTtske4xDpS4iUrLnXjdMXQcJXRMHrxcZC3NIbKVRxU/7kCowKLnkRvUIGK6Fjopabv5801KFbJKPaXqRTxc31z7PlynhYhGI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=DhZa4D2G; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="DhZa4D2G" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 91844C2BCAF; Mon, 13 Apr 2026 16:19:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776097184; bh=yUDHluQa83fTCOKpsDnPpefv6fFwI8VrNvCmyjTWeDk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=DhZa4D2GFPMEPATeQn1bh9WnLzwrHC9cXlmtn5nM5AeqvC/P3Maoseo8L3HwI/hwz scy8Ay5+9AO7acjS9UGMdBikv4TSvbRkj9r05Lptg/UE+wwtn5Z0c2DoF6Pzwy4Fzv eGyi8FmhorGc1wROjF2SQZ5DsMPBuo92OM+K24nw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Andrey Vatoropin , Helge Deller , Sasha Levin Subject: [PATCH 5.15 038/570] fbcon: check return value of con2fb_acquire_newinfo() Date: Mon, 13 Apr 2026 17:52:49 +0200 Message-ID: <20260413155831.855179664@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260413155830.386096114@linuxfoundation.org> References: <20260413155830.386096114@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andrey Vatoropin [ Upstream commit 011a0502801c8536f64141a2b61362c14f456544 ] 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 Signed-off-by: Helge Deller Signed-off-by: Sasha Levin --- 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/fbcon.c index 0039441f3769b..f4584681fa43d 100644 --- a/drivers/video/fbdev/core/fbcon.c +++ b/drivers/video/fbdev/core/fbcon.c @@ -1008,7 +1008,8 @@ static void fbcon_init(struct vc_data *vc, bool init) return; if (!info->fbcon_par) - con2fb_acquire_newinfo(vc, info, vc->vc_num); + if (con2fb_acquire_newinfo(vc, info, vc->vc_num)) + return; /* If we are not the first console on this fb, copy the font from that console */ -- 2.51.0