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Date: Wed, 6 Jun 2018 16:26:58 +0800
From: Chengguang Xu <cgxu519@....com>
To: tytso@....edu, adilger.kernel@...ger.ca
Cc: linux-ext4@...r.kernel.org, Chengguang Xu <cgxu519@....com>
Subject: [PATCH] ext4: check orig_data in remount
Currently duplicate data to orig_data in ext4_remount()
but there is lack of check for duplication result.
This patch adds proper check for it.
Signed-off-by: Chengguang Xu <cgxu519@....com>
---
fs/ext4/super.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 00fe75a71c4b..cba245460a9c 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5014,6 +5014,9 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
#endif
char *orig_data = kstrdup(data, GFP_KERNEL);
+ if (data && !orig_data)
+ return -ENOMEM;
+
/* Store the original options */
old_sb_flags = sb->s_flags;
old_opts.s_mount_opt = sbi->s_mount_opt;
--
2.17.1
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