From 2b8f13d3c7e26c46c20d9e367904cf01729c88e6 Mon Sep 17 00:00:00 2001 From: Osama Abdelkader Date: Fri, 24 Jul 2026 19:26:20 +0200 Subject: [PATCH] drm/panthor: skip zero-sized firmware sections panthor_fw_load_section_entry() skips BO creation when the firmware section VA range is empty. If such a section is added to the firmware section list, section->mem is left as NULL. Later reload and unplug paths iterate over all firmware sections and dereference section->mem, which can lead to a NULL pointer dereference. Zero-sized firmware sections are valid, so accept them as no-op entries but skip adding them to the section list. Fixes: 2718d91816ee ("drm/panthor: Add the FW logical block") Cc: stable@vger.kernel.org Signed-off-by: Osama Abdelkader Reviewed-by: Liviu Dudau Reviewed-by: Steven Price Link: https://patch.msgid.link/20260724172621.63046-1-osama.abdelkader@gmail.com Signed-off-by: Steven Price --- drivers/gpu/drm/panthor/panthor_fw.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/panthor/panthor_fw.c b/drivers/gpu/drm/panthor/panthor_fw.c index e45933e333b5..fa88b2f9da76 100644 --- a/drivers/gpu/drm/panthor/panthor_fw.c +++ b/drivers/gpu/drm/panthor/panthor_fw.c @@ -603,6 +603,9 @@ static int panthor_fw_load_section_entry(struct panthor_device *ptdev, return -EINVAL; } + if (!section_size) + return 0; + name_len = iter->size - iter->offset; section = drmm_kzalloc(&ptdev->base, sizeof(*section), GFP_KERNEL);