linux-kernel - [PATCH] f2fs: add sanity check for proc

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Date:   Fri,  7 Apr 2023 03:37:16 +0800
From:   Yangtao Li <frank.li@...o.com>
To:     Jaegeuk Kim <jaegeuk@...nel.org>, Chao Yu <chao@...nel.org>
Cc:     Yangtao Li <frank.li@...o.com>,
        linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: [PATCH] f2fs: add sanity check for proc_mkdir

Return -ENOMEM when proc_mkdir failed.

Signed-off-by: Yangtao Li <frank.li@...o.com>
---
 fs/f2fs/sysfs.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 3aad3500a701..dcd497e0920a 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -1385,12 +1385,19 @@ int __init f2fs_init_sysfs(void)
 
 	ret = kobject_init_and_add(&f2fs_feat, &f2fs_feat_ktype,
 				   NULL, "features");
-	if (ret) {
-		kobject_put(&f2fs_feat);
-		kset_unregister(&f2fs_kset);
-	} else {
-		f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
+	if (ret)
+		goto put_kobject;
+
+	f2fs_proc_root = proc_mkdir("fs/f2fs", NULL);
+	if (!f2fs_proc_root) {
+		ret = -ENOMEM;
+		goto put_kobject;
 	}
+
+	return 0;
+put_kobject:
+	kobject_put(&f2fs_feat);
+	kset_unregister(&f2fs_kset);
 	return ret;
 }
 
-- 
2.35.1