linux-kernel - [PATCH] pstore/ram: Fix error return code in ramoops

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Date:   Fri, 2 Dec 2022 16:22:54 +0800
From:   Wang Yufen <wangyufen@...wei.com>
To:     <keescook@...omium.org>, <anton@...msg.org>, <ccross@...roid.com>,
        <tony.luck@...el.com>
CC:     <linux-kernel@...r.kernel.org>, Wang Yufen <wangyufen@...wei.com>
Subject: [PATCH] pstore/ram: Fix error return code in ramoops_probe()

In the if (dev_of_node(dev) && !pdata) path, the "err" may be assigned a
value of 0, so the error return code -EINVAL may be incorrectly set
to 0. To fix set valid return code before calling to goto.

Fixes: 35da60941e44 ("pstore/ram: add Device Tree bindings")
Signed-off-by: Wang Yufen <wangyufen@...wei.com>
---
 fs/pstore/ram.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index fefe3d3..74e4d93 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -735,6 +735,7 @@ static int ramoops_probe(struct platform_device *pdev)
 	/* Make sure we didn't get bogus platform data pointer. */
 	if (!pdata) {
 		pr_err("NULL platform data\n");
+		err = -EINVAL;
 		goto fail_out;
 	}
 
@@ -742,6 +743,7 @@ static int ramoops_probe(struct platform_device *pdev)
 			!pdata->ftrace_size && !pdata->pmsg_size)) {
 		pr_err("The memory size and the record/console size must be "
 			"non-zero\n");
+		err = -EINVAL;
 		goto fail_out;
 	}
 
-- 
1.8.3.1