From: Jiale Yao <yaojiale02@163.com>
To: Christian Koenig <christian.koenig@amd.com>,
Huang Rui <ray.huang@amd.com>,
Matthew Auld <matthew.auld@intel.com>,
Matthew Brost <matthew.brost@intel.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
David Rheinsberg <david@readahead.eu>,
Dave Airlie <airlied@redhat.com>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Cc: Jiale Yao <yaojiale02@163.com>
Subject: [PATCH 5/6] drm/ttm: reject empty range manager sizes
Date: Mon, 19 Oct 2026 16:41:37 +0800 [thread overview]
Message-ID: <20261019084138.1821477-6-yaojiale02@163.com> (raw)
In-Reply-To: <20261019084138.1821477-1-yaojiale02@163.com>
A zero page count reaches drm_mm_init() and causes its zero-range BUG
check to fire. Return an error before allocating and installing the
range manager.
Fixes: 77ef8bbc87be ("drm: make drm_mm_init() return void")
Signed-off-by: Jiale Yao <yaojiale02@163.com>
---
drivers/gpu/drm/ttm/ttm_range_manager.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/gpu/drm/ttm/ttm_range_manager.c b/drivers/gpu/drm/ttm/ttm_range_manager.c
index b818836f0726..5fd484ae1706 100644
--- a/drivers/gpu/drm/ttm/ttm_range_manager.c
+++ b/drivers/gpu/drm/ttm/ttm_range_manager.c
@@ -184,6 +184,9 @@ int ttm_range_man_init_nocheck(struct ttm_device *bdev,
struct ttm_resource_manager *man;
struct ttm_range_manager *rman;
+ if (!p_size)
+ return -EINVAL;
+
rman = kzalloc_obj(*rman);
if (!rman)
return -ENOMEM;
--
2.34.1
next prev parent reply other threads:[~2026-10-19 8:43 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-19 8:41 [PATCH 0/6] drm: reject empty TTM " Jiale Yao
2026-10-19 8:41 ` [PATCH 1/6] drm/vram-helper: reject empty VRAM ranges Jiale Yao
2026-10-19 8:41 ` [PATCH 2/6] drm/nouveau: " Jiale Yao
2026-10-19 8:41 ` [PATCH 3/6] drm/qxl: reject empty TTM memory ranges Jiale Yao
2026-10-19 8:41 ` [PATCH 4/6] drm/radeon: reject empty VRAM ranges Jiale Yao
2026-10-19 8:41 ` Jiale Yao [this message]
2026-10-19 8:41 ` [PATCH 6/6] drm/vmwgfx: " Jiale Yao
2026-10-19 8:48 ` [PATCH 0/6] drm: reject empty TTM range manager sizes Christian König
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20261019084138.1821477-6-yaojiale02@163.com \
--to=yaojiale02@163.com \
--cc=airlied@gmail.com \
--cc=airlied@redhat.com \
--cc=christian.koenig@amd.com \
--cc=david@readahead.eu \
--cc=dri-devel@lists.freedesktop.org \
--cc=linux-kernel@vger.kernel.org \
--cc=maarten.lankhorst@linux.intel.com \
--cc=matthew.auld@intel.com \
--cc=matthew.brost@intel.com \
--cc=mripard@kernel.org \
--cc=ray.huang@amd.com \
--cc=simona@ffwll.ch \
--cc=tzimmermann@suse.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®