linux-kernel - [PATCH] ramoops: add pdata NULL check to ramoops

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Date:   Wed, 28 Sep 2016 18:32:38 +0800
From:   Geliang Tang <geliangtang@...il.com>
To:     Anton Vorontsov <anton@...msg.org>,
        Colin Cross <ccross@...roid.com>,
        Kees Cook <keescook@...omium.org>,
        Tony Luck <tony.luck@...el.com>
Cc:     Geliang Tang <geliangtang@...il.com>, linux-kernel@...r.kernel.org
Subject: [PATCH] ramoops: add pdata NULL check to ramoops_probe

When the pdata is NULL, ramoops_probe() segfaults. So this patch adds
a NULL check to it.

Signed-off-by: Geliang Tang <geliangtang@...il.com>
---
 fs/pstore/ram.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 6ad831b..dd9832d 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -576,6 +576,9 @@ static int ramoops_probe(struct platform_device *pdev)
 	if (cxt->max_dump_cnt)
 		goto fail_out;
 
+	if (!pdata)
+		goto fail_out;
+
 	if (!pdata->mem_size || (!pdata->record_size && !pdata->console_size &&
 			!pdata->ftrace_size && !pdata->pmsg_size)) {
 		pr_err("The memory size and the record/console size must be "
-- 
2.7.4