From: trix@redhat.com
To: patrik.r.jakobsson@gmail.com, airlied@linux.ie, daniel@ffwll.ch,
natechancellor@gmail.com, ndesaulniers@google.com,
alan@linux.intel.com, airlied@redhat.com, yakui.zhao@intel.com
Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
clang-built-linux@googlegroups.com, Tom Rix <trix@redhat.com>
Subject: [PATCH] drm/gma500: fix double free of gma_connector
Date: Sat, 3 Oct 2020 12:39:28 -0700 [thread overview]
Message-ID: <20201003193928.18869-1-trix@redhat.com> (raw)
From: Tom Rix <trix@redhat.com>
clang static analysis reports this problem:
cdv_intel_dp.c:2101:2: warning: Attempt to free released memory
kfree(gma_connector);
^~~~~~~~~~~~~~~~~~~~
In cdv_intel_dp_init() when the call to cdv_intel_edp_panel_vdd_off()
fails, the handler calls cdv_intel_dp_destroy(connector) which does
the first free of gma_connector. So adjust the goto label and skip
the second free.
Fixes: d112a8163f83 ("gma500/cdv: Add eDP support")
Signed-off-by: Tom Rix <trix@redhat.com>
---
drivers/gpu/drm/gma500/cdv_intel_dp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/gma500/cdv_intel_dp.c b/drivers/gpu/drm/gma500/cdv_intel_dp.c
index 720a767118c9..deb4fd13591d 100644
--- a/drivers/gpu/drm/gma500/cdv_intel_dp.c
+++ b/drivers/gpu/drm/gma500/cdv_intel_dp.c
@@ -2083,7 +2083,7 @@ cdv_intel_dp_init(struct drm_device *dev, struct psb_intel_mode_device *mode_dev
DRM_INFO("failed to retrieve link info, disabling eDP\n");
drm_encoder_cleanup(encoder);
cdv_intel_dp_destroy(connector);
- goto err_priv;
+ goto err_connector;
} else {
DRM_DEBUG_KMS("DPCD: Rev=%x LN_Rate=%x LN_CNT=%x LN_DOWNSP=%x\n",
intel_dp->dpcd[0], intel_dp->dpcd[1],
--
2.18.1
next reply other threads:[~2020-10-03 19:39 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-03 19:39 trix [this message]
2020-10-05 13:52 ` [PATCH] drm/gma500: fix double free of gma_connector Daniel Vetter
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