[PATCH 3.4 007/107] hpfs: kstrdup() out of memory handling

lizf
2016-03-16T08:45:23Z

From: Sanidhya Kashyap <sanidhya.gatech@gmail.com>

3.4.111-rc1 review patch. If anyone has any objections, please let me know.

------------------

commit ce657611baf902f14ae559ce4e0787ead6712067 upstream.

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@gmail.com>
Signed-off-by: Mikulas Patocka <mikulas@twibright.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[lizf: Backported to 3.4: adjust context]
Signed-off-by: Zefan Li <lizefan@huawei.com>
---
fs/hpfs/super.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 0bf578d..0b990b2 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -385,9 +385,13 @@ 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;
+
*flags |= MS_NOATIME;
-
+
hpfs_lock(s);
lock_super(s);
uid = sbi->sb_uid; gid = sbi->sb_gid;
--
1.9.1