Commit b6126afd authored by Emil Velikov's avatar Emil Velikov Committed by Greg Kroah-Hartman

drm/msm: don't deref error pointer in the msm_fbdev_create error path

[ Upstream commit 789d4c30 ]

Currently the error pointer returned by msm_alloc_stolen_fb gets passed
to drm_framebuffer_remove. The latter handles only NULL pointers, thus
a nasty crash will occur.

Drop the unnecessary fail label and the associated checks - both err and
fb will be set at this stage.

Cc: Rob Clark <robdclark@gmail.com>
Cc: linux-arm-msm@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org
Cc: freedreno@lists.freedesktop.org
Signed-off-by: default avatarEmil Velikov <emil.velikov@collabora.com>
Signed-off-by: default avatarRob Clark <robdclark@gmail.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 5151a0c8
......@@ -92,8 +92,7 @@ static int msm_fbdev_create(struct drm_fb_helper *helper,
if (IS_ERR(fb)) {
dev_err(dev->dev, "failed to allocate fb\n");
ret = PTR_ERR(fb);
goto fail;
return PTR_ERR(fb);
}
bo = msm_framebuffer_bo(fb, 0);
......@@ -151,13 +150,7 @@ static int msm_fbdev_create(struct drm_fb_helper *helper,
fail_unlock:
mutex_unlock(&dev->struct_mutex);
fail:
if (ret) {
if (fb)
drm_framebuffer_remove(fb);
}
drm_framebuffer_remove(fb);
return ret;
}
......
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