From c1efac70d692e055ec3b7bd547f4823961648f57 Mon Sep 17 00:00:00 2001 From: Biju Das Date: Thu, 6 Feb 2025 09:42:50 +0000 Subject: [PATCH] drm: adv7511: Fix use-after-free in adv7533_attach_dsi() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit stable inclusion from stable-v5.10.234 commit 49881fcef3d4b8733fcdcf76f1bc12ec291b74be category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBID2S CVE: CVE-2024-57887 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=82c7a4cf14aa866f8f7f09e662b02eddc49ee0bf -------------------------------- [ Upstream commit 81adbd3ff21c1182e06aa02c6be0bfd9ea02d8e8 ] The host_node pointer was assigned and freed in adv7533_parse_dt(), and later, adv7533_attach_dsi() uses the same. Fix this use-after-free issue by dropping of_node_put() in adv7533_parse_dt() and calling of_node_put() in error path of probe() and also in the remove(). Fixes: 1e4d58cd7f88 ("drm/bridge: adv7533: Create a MIPI DSI device") Cc: stable@vger.kernel.org Reviewed-by: Laurent Pinchart Signed-off-by: Biju Das Link: https://patchwork.freedesktop.org/patch/msgid/20241119192040.152657-2-biju.das.jz@bp.renesas.com Signed-off-by: Dmitry Baryshkov Signed-off-by: Sasha Levin Conflicts: drivers/gpu/drm/bridge/adv7511/adv7511_drv.c drivers/gpu/drm/bridge/adv7511/adv7533.c [Context differences.] Signed-off-by: Zheng Zucheng --- drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 5 ++++- drivers/gpu/drm/bridge/adv7511/adv7533.c | 2 -- 2 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index 31bce3a37b20..faf64f6c2a53 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -1125,7 +1125,7 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id) ret = adv7511_init_regulators(adv7511); if (ret) { dev_err(dev, "failed to init regulators\n"); - return ret; + goto err_of_node_put; } /* @@ -1235,6 +1235,8 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id) i2c_unregister_device(adv7511->i2c_edid); uninit_regulators: adv7511_uninit_regulators(adv7511); +err_of_node_put: + of_node_put(adv7511->host_node); return ret; } @@ -1249,6 +1251,7 @@ static int adv7511_remove(struct i2c_client *i2c) if (adv7511->cec_clk) clk_disable_unprepare(adv7511->cec_clk); + of_node_put(adv7511->host_node); adv7511_uninit_regulators(adv7511); drm_bridge_remove(&adv7511->bridge); diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c index 185b6d842166..de0bd603baf1 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7533.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c @@ -210,8 +210,6 @@ int adv7533_parse_dt(struct device_node *np, struct adv7511 *adv) if (!adv->host_node) return -ENODEV; - of_node_put(adv->host_node); - adv->use_timing_gen = !of_property_read_bool(np, "adi,disable-timing-generator"); -- Gitee