From: Claude Code Review Bot <claude-review@example.com>
To: dri-devel-reviews@example.com
Subject: Claude review: drm/rockchip: dw_dp: Fix null-ptr-deref in dw_dp_remove()
Date: Tue, 10 Mar 2026 11:47:01 +1000 [thread overview]
Message-ID: <review-patch3-20260310-drm-rk-fixes-v2-3-645ecfb43f49@collabora.com> (raw)
In-Reply-To: <20260310-drm-rk-fixes-v2-3-645ecfb43f49@collabora.com>
Patch Review
**Verdict: Good**
The `dw_dp_remove()` callback previously did `platform_get_drvdata()` to get `dp->dev`, but `platform_set_drvdata()` is only called inside `dw_dp_rockchip_bind()` (the component bind). If bind was never called (e.g., `rockchip_drm_bind()` failed early), the drvdata is NULL and dereferencing it causes a null-ptr-deref.
```c
- struct rockchip_dw_dp *dp = platform_get_drvdata(pdev);
- component_del(dp->dev, &dw_dp_rockchip_component_ops);
+ component_del(&pdev->dev, &dw_dp_rockchip_component_ops);
```
Clean fix — `&pdev->dev` is always valid.
---
Generated by Claude Code Patch Reviewer
next prev parent reply other threads:[~2026-03-10 1:47 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-09 22:44 [PATCH v2 0/8] Rockchip DRM use-after-free & null-ptr-deref fixes Cristian Ciocaltea
2026-03-09 22:44 ` [PATCH v2 1/8] drm/rockchip: inno-hdmi: Switch to drmm_kzalloc() Cristian Ciocaltea
2026-03-10 1:47 ` Claude review: " Claude Code Review Bot
2026-03-09 22:44 ` [PATCH v2 2/8] drm/rockchip: dw_dp: " Cristian Ciocaltea
2026-03-10 1:47 ` Claude review: " Claude Code Review Bot
2026-03-09 22:44 ` [PATCH v2 3/8] drm/rockchip: dw_dp: Fix null-ptr-deref in dw_dp_remove() Cristian Ciocaltea
2026-03-10 1:47 ` Claude Code Review Bot [this message]
2026-03-09 22:44 ` [PATCH v2 4/8] drm/rockchip: dw_dp: Simplify error handling Cristian Ciocaltea
2026-03-10 1:47 ` Claude review: " Claude Code Review Bot
2026-03-09 22:44 ` [PATCH v2 5/8] drm/rockchip: dw_dp: Drop unnecessary #include Cristian Ciocaltea
2026-03-10 1:47 ` Claude review: " Claude Code Review Bot
2026-03-09 22:44 ` [PATCH v2 6/8] drm/rockchip: dw_hdmi_qp: Switch to drmm_encoder_init() Cristian Ciocaltea
2026-03-10 1:47 ` Claude review: " Claude Code Review Bot
2026-03-09 22:44 ` [PATCH v2 7/8] drm/bridge: synopsys: dw-dp: Unregister AUX channel on bridge detach Cristian Ciocaltea
2026-03-10 1:47 ` Claude review: " Claude Code Review Bot
2026-03-09 22:44 ` [PATCH v2 8/8] drm/bridge: synopsys: dw-dp: Drop useless memory allocation Cristian Ciocaltea
2026-03-10 1:47 ` Claude review: " Claude Code Review Bot
2026-03-10 1:47 ` Claude review: Rockchip DRM use-after-free & null-ptr-deref fixes Claude Code Review Bot
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