linux-kernel - [PATCH] hpfs: kstrdup() memory handling

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Message-Id: <1426957070-2914-1-git-send-email-sanidhya.gatech@gmail.com>
Date:	Sat, 21 Mar 2015 12:57:50 -0400
From:	Sanidhya Kashyap <sanidhya.gatech@...il.com>
To:	mikulas@...ax.karlin.mff.cuni.cz, linux-kernel@...r.kernel.org
Cc:	taesoo@...ech.edu, changwoo@...ech.edu, sanidhya@...ech.edu,
	blee@...ech.edu, Sanidhya Kashyap <sanidhya.gatech@...il.com>
Subject: [PATCH] hpfs: kstrdup() memory handling

There is a possibility of nothing being allocated to the new_opts in
case of memory pressure, therefore return ENOMEM for such case.

Signed-off-by: Sanidhya Kashyap <sanidhya.gatech@...il.com>
---
 fs/hpfs/super.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 7cd00d3..885eadb 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -424,6 +424,9 @@ static int hpfs_remount_fs(struct super_block *s, int *flags, char *data)
 	int o;
 	struct hpfs_sb_info *sbi = hpfs_sb(s);
 	char *new_opts = kstrdup(data, GFP_KERNEL);
+
+	if (!new_opts)
+		return -ENOMEM;
 	
 	sync_filesystem(s);
 
-- 
2.1.0

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