[PATCH 3.16.y-ckt 012/118] hpfs: kstrdup() out of memory handling

From: Luis Henriques
Date: Wed Aug 12 2015 - 05:40:59 EST

3.16.7-ckt16 -stable review patch. If anyone has any objections, please let me know.


From: Sanidhya Kashyap <sanidhya.gatech@xxxxxxxxx>

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@xxxxxxxxx>
Signed-off-by: Mikulas Patocka <mikulas@xxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
fs/hpfs/super.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 7cd00d3a7c9b..e12a06b300e0 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -424,11 +424,14 @@ 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;
uid = sbi->sb_uid; gid = sbi->sb_gid;
umask = 0777 & ~sbi->sb_mode;
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