hpfs: kstrdup() out of memory handling

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 7cd00d3a7c9b742a86d9fdb16a36b805952b2cf9..e12a06b300e0ab3b8ff694e645506d021a33336e 100644 (file)
--- 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;
+
        sync_filesystem(s);
 
        *flags |= MS_NOATIME;
-       
+
        hpfs_lock(s);
        uid = sbi->sb_uid; gid = sbi->sb_gid;
        umask = 0777 & ~sbi->sb_mode;