From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 97CB0157A5A; Sat, 30 May 2026 16:32:19 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780158740; cv=none; b=EGA3nQzn/0bte59sMLg9nqUEm8mvp7Wfvsa+dN1L4Q1uBP82UbPiD5u6ANxKt8MKzVIeLHldvZrP/hr0CF7UZZ6Vy9/h71YcF1C4zdM8Kn4Gisg4PqeD0XKrv2uz+TANnKQtPb3gi4trwuo3l7dntWv/yhlRJs3AQyjKrsdwOIU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780158740; c=relaxed/simple; bh=zU2ff5lzH+/seuFutKfOe83tmUI3RV3p4+0bT2ITKSg=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=UyIaeRIbZ0R7j0M5MScZE75m2bFp0uk53MvZcvpF2tAPJFXxLPPAWAJ0KVwVAzBwBllm8VQtY8BbfXRpPn8xD6WK9+piaWULMAyNFGoYO7yB2LGdbj4q7QAqrsRLDDcaAf+bTUWdKkUlPKsBxqv2A8V7c2ndHGhasbk6yXGYylY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=2RcejEqr; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="2RcejEqr" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CF71D1F00893; Sat, 30 May 2026 16:32:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1780158739; bh=Ws4HbMOSKD+jmFtn0rNHJN5AWN9yFtrr4DH9wijBz6A=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=2RcejEqravEpAEclcPGe6xwLqOJd3M0vfU580y2vKwTKV6IN9VgUx3+GBkDh3co0Z zn7bkDO0gFsm70mhfGYHWgGpwJpYAoY3MsTPZ2RwgieGWCOTuu0DZ75s2YE1fGIB1O KResMe+YMKIEov9sqdY0xttV31OBbGGeRR3YoksQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Yuhao Jiang , Junrui Luo Subject: [PATCH 6.1 078/969] staging: sm750fb: fix division by zero in ps_to_hz() Date: Sat, 30 May 2026 17:53:22 +0200 Message-ID: <20260530160302.505596204@linuxfoundation.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260530160300.485627683@linuxfoundation.org> References: <20260530160300.485627683@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Junrui Luo commit 75a1621e4f91310673c9acbcbb25c2a7ff821cd3 upstream. ps_to_hz() is called from hw_sm750_crtc_set_mode() without validating that pixclock is non-zero. A zero pixclock passed via FBIOPUT_VSCREENINFO causes a division by zero. Fix by rejecting zero pixclock in lynxfb_ops_check_var(), consistent with other framebuffer drivers. Fixes: 81dee67e215b ("staging: sm750fb: add sm750 to staging") Reported-by: Yuhao Jiang Cc: stable@vger.kernel.org Signed-off-by: Junrui Luo Link: https://patch.msgid.link/SYBPR01MB7881AFBFCE28CCF528B35D0CAF4BA@SYBPR01MB7881.ausprd01.prod.outlook.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/sm750fb/sm750.c | 3 +++ 1 file changed, 3 insertions(+) --- a/drivers/staging/sm750fb/sm750.c +++ b/drivers/staging/sm750fb/sm750.c @@ -484,6 +484,9 @@ static int lynxfb_ops_check_var(struct f struct lynxfb_crtc *crtc; resource_size_t request; + if (!var->pixclock) + return -EINVAL; + ret = 0; par = info->par; crtc = &par->crtc;