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m501fb: don't return zero on failure path in sm501fb_probe()
If no framebuffers found, sm501fb_probe() breaks off initialization, deallocates sm501fb_info, but returns zero. As a result, use after free can happen in sm501fb_remove(). The patch adds -ENODEV as a return value in this case. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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@ -1988,6 +1988,7 @@ static int sm501fb_probe(struct platform_device *pdev)
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if (info->fb[HEAD_PANEL] == NULL &&
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info->fb[HEAD_CRT] == NULL) {
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dev_err(dev, "no framebuffers found\n");
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ret = -ENODEV;
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goto err_alloc;
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}
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