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[3.19.y-ckt,038/107] hpfs: kstrdup() out of memory handling

Message ID 1438811379-384-39-git-send-email-kamal@canonical.com
State New
Headers show

Commit Message

Kamal Mostafa Aug. 5, 2015, 9:48 p.m. UTC 
3.19.8-ckt5 -stable review patch.  If anyone has any objections, please let me know.

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

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

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: Kamal Mostafa <kamal@canonical.com>
---
 fs/hpfs/super.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)
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Patch

diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index 7cd00d3..e12a06b 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;
+
 	sync_filesystem(s);
 
 	*flags |= MS_NOATIME;
-	
+
 	hpfs_lock(s);
 	uid = sbi->sb_uid; gid = sbi->sb_gid;
 	umask = 0777 & ~sbi->sb_mode;