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ramoops: add pdata NULL check to ramoops_probe
This adds a check for a NULL platform data, which should only be possible if a driver incorrectly sets up a probe request without also having defined the platform_data structure. This is based on a patch from Geliang Tang. Signed-off-by: Kees Cook <keescook@chromium.org>
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@ -734,11 +734,20 @@ static int ramoops_probe(struct platform_device *pdev)
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goto fail_out;
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}
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/* Only a single ramoops area allowed at a time, so fail extra
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/*
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* Only a single ramoops area allowed at a time, so fail extra
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* probes.
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*/
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if (cxt->max_dump_cnt)
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if (cxt->max_dump_cnt) {
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pr_err("already initialized\n");
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goto fail_out;
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}
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/* Make sure we didn't get bogus platform data pointer. */
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if (!pdata) {
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pr_err("NULL platform data\n");
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goto fail_out;
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}
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if (!pdata->mem_size || (!pdata->record_size && !pdata->console_size &&
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!pdata->ftrace_size && !pdata->pmsg_size)) {
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