linux-kernel - [PATCH] drm/msm/dp: Fix a potential double free in an error handling path

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Date:   Sun, 26 Dec 2021 16:14:05 +0100
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     robdclark@...il.com, sean@...rly.run, quic_abhinavk@...cinc.com,
        airlied@...ux.ie, daniel@...ll.ch, bjorn.andersson@...aro.org,
        swboyd@...omium.org, quic_khsieh@...cinc.com
Cc:     linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>
Subject: [PATCH] drm/msm/dp: Fix a potential double free in an error handling path

'dp_bridge' is devm_alloc'ed, so there is no need to free it explicitly or
there will be a double free().

Fixes: 8a3b4c17f863 ("drm/msm/dp: employ bridge mechanism for display enable and disable")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
---
 drivers/gpu/drm/msm/dp/dp_drm.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_drm.c b/drivers/gpu/drm/msm/dp/dp_drm.c
index 188e77c59885..d4d360d19eba 100644
--- a/drivers/gpu/drm/msm/dp/dp_drm.c
+++ b/drivers/gpu/drm/msm/dp/dp_drm.c
@@ -243,7 +243,6 @@ struct drm_bridge *msm_dp_bridge_init(struct msm_dp *dp_display, struct drm_devi
 	rc = drm_bridge_attach(encoder, bridge, NULL, DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 	if (rc) {
 		DRM_ERROR("failed to attach bridge, rc=%d\n", rc);
-		kfree(dp_bridge);
 		return ERR_PTR(rc);
 	}
 
-- 
2.32.0