diff options
| author | Jesper Juhl <jj@chaosbits.net> | 2012-03-08 16:00:58 +0000 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2012-03-10 13:05:37 +0000 |
| commit | aa7c62af10b6ba7f0496ee3a1a760ad216426720 (patch) | |
| tree | 25f67514f2fcfb7ed7f1859053d83b2f09f469b9 /drivers/gpu/drm/gma500/psb_intel_lvds.c | |
| parent | 05442e5e1ff1e75868e4f83822775f41e18c63b4 (diff) | |
intel, gma500, lvds: Fix use after free and mem leak in psb_intel_lvds_init()
In psb_intel_lvds_init(), if we fail to allocate memory for
'psb_intel_connector' we free the memory we previously allocated for
'psb_intel_encoder', but we then proceed to use that free'd pointer
when we do 'psb_intel_encoder->dev_priv = lvds_priv;'.
We may also leak the memory we allocated for 'psb_intel_encoder' if we
'goto failed_connector;' and the variable goes out of scope.
While I was there anyway, I also removed the pointless 'if
(psb_intel_connector)' before freeing it at the 'failed_connector:'
label - kfree() deals gracefully with NULL pointers, so it is not
needed.
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/gma500/psb_intel_lvds.c')
| -rw-r--r-- | drivers/gpu/drm/gma500/psb_intel_lvds.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/drivers/gpu/drm/gma500/psb_intel_lvds.c b/drivers/gpu/drm/gma500/psb_intel_lvds.c index 69a96513752f..c83f5b5d1057 100644 --- a/drivers/gpu/drm/gma500/psb_intel_lvds.c +++ b/drivers/gpu/drm/gma500/psb_intel_lvds.c @@ -713,7 +713,6 @@ void psb_intel_lvds_init(struct drm_device *dev, psb_intel_encoder = kzalloc(sizeof(struct psb_intel_encoder), GFP_KERNEL); - if (!psb_intel_encoder) { dev_err(dev->dev, "psb_intel_encoder allocation error\n"); return; @@ -721,10 +720,9 @@ void psb_intel_lvds_init(struct drm_device *dev, psb_intel_connector = kzalloc(sizeof(struct psb_intel_connector), GFP_KERNEL); - if (!psb_intel_connector) { - kfree(psb_intel_encoder); dev_err(dev->dev, "psb_intel_connector allocation error\n"); + goto failed_encoder; } lvds_priv = kzalloc(sizeof(struct psb_intel_lvds_priv), GFP_KERNEL); @@ -862,7 +860,8 @@ failed_blc_i2c: drm_encoder_cleanup(encoder); drm_connector_cleanup(connector); failed_connector: - if (psb_intel_connector) - kfree(psb_intel_connector); + kfree(psb_intel_connector); +failed_encoder: + kfree(psb_intel_encoder); } |