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[62.151.111.63]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-426ce5cfe74sm21846822f8f.35.2025.10.14.00.36.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Oct 2025 00:36:28 -0700 (PDT) From: Javier Martinez Canillas To: Jocelyn Falempe , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Jocelyn Falempe , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Cc: stable@vger.kernel.org Subject: Re: [PATCH 5/6] drm/panic: Fix divide by 0 if the screen width < font width In-Reply-To: <20251009122955.562888-6-jfalempe@redhat.com> References: <20251009122955.562888-1-jfalempe@redhat.com> <20251009122955.562888-6-jfalempe@redhat.com> Date: Tue, 14 Oct 2025 09:36:27 +0200 Message-ID: <877bwyq6is.fsf@ocarina.mail-host-address-is-not-set> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain Jocelyn Falempe writes: > In the unlikely case that the screen is tiny, and smaller than the > font width, it leads to a divide by 0: > > draw_line_with_wrap() > chars_per_row = sb->width / font->width = 0 > line_wrap.len = line->len % chars_per_row; > > This will trigger a divide by 0 > > Signed-off-by: Jocelyn Falempe > --- Reviewed-by: Javier Martinez Canillas -- Best regards, Javier Martinez Canillas Core Platforms Red Hat