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Wed, 01 Jul 2026 16:42:50 -0700 (PDT) From: Melbin K Mathew To: deller@gmx.de Cc: linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Melbin K Mathew Subject: [PATCH v3 0/3] fbdev: fix mode sysfs lifetime and bounds issues Date: Thu, 2 Jul 2026 01:42:45 +0200 Message-Id: <20260701234248.236023-1-mlbnkm1@gmail.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20260701231706.234715-1-mlbnkm1@gmail.com> References: <20260701231706.234715-1-mlbnkm1@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This v3 adds a patch to clear fb_info->mode before deleting a videomode through FBIOPUT_VSCREENINFO with FB_ACTIVATE_INV_MODE. Patch 1 bounds mode sysfs output so show_modes() cannot advance the sysfs buffer offset past PAGE_SIZE. Patch 2 clears fb_info->mode before fb_delete_videomode() when it matches the mode being removed via the FBIOPUT_VSCREENINFO ioctl. Patch 3 serializes mode sysfs access with lock_fb_info(), including store_mode(), show_mode(), and show_modes(). Changes in v3: - Add patch to clear fb_info->mode in fb_set_var() INV_MODE path. Melbin K Mathew (3): fbdev: bound mode sysfs output to the sysfs buffer fbdev: clear fb_info->mode before deleting a videomode fbdev: serialize mode sysfs access with lock_fb_info() drivers/video/fbdev/core/fbmem.c | 5 ++- drivers/video/fbdev/core/fbsysfs.c | 59 ++++++++++++++++++++++++------ 2 files changed, 51 insertions(+), 13 deletions(-) -- 2.39.5