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Mon, 23 Mar 2026 01:32:39 -0700 (PDT) Date: Mon, 23 Mar 2026 11:32:36 +0300 From: Dan Carpenter To: Junrui Luo Cc: Sudip Mukherjee , Teddy Wang , Greg Kroah-Hartman , linux-fbdev@vger.kernel.org, linux-staging@lists.linux.dev, linux-kernel@vger.kernel.org, Yuhao Jiang , stable@vger.kernel.org Subject: Re: [PATCH] staging: sm750fb: fix division by zero in ps_to_hz() Message-ID: References: Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Mon, Mar 23, 2026 at 03:31:56PM +0800, Junrui Luo wrote: > 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 > --- Seems reasonable. There is no Closes tag. Could we get some more information about how this was found and tested? regards, dan carpenter