Patch "cifs: fix CIFS_ENUMERATE_SNAPSHOTS oops" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

cifs: fix CIFS_ENUMERATE_SNAPSHOTS oops

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
cifs-fix-cifs_enumerate_snapshots-oops.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: David Disseldorp <[email protected]>
Date: Wed, 3 May 2017 17:39:08 +0200
Subject: cifs: fix CIFS_ENUMERATE_SNAPSHOTS oops

From: David Disseldorp <[email protected]>

commit 6026685de33b0db5b2b6b0e9b41b3a1a3261033c upstream.

As with 618763958b22, an open directory may have a NULL private_data pointer prior to readdir. CIFS_ENUMERATE_SNAPSHOTS must check for this before dereference.

---
 fs/cifs/ioctl.c |    2 ++
 1 file changed, 2 insertions(+)

@@ -268,6 +268,8 @@ long cifs_ioctl(struct file *filep, unsi
 			rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
 			break;
 		case CIFS_ENUMERATE_SNAPSHOTS:
+			if (pSMBFile == NULL)
+				break;
 			if (arg == 0) {
 				rc = -EINVAL;
 				goto cifs_ioc_exit;

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/cifs-fix-cifs_ioc_get_mnt_info-oops.patch queue-4.9/target-fileio-fix-zero-length-read-and-write-handling.patch queue-4.9/cifs-fix-cifs_enumerate_snapshots-oops.patch queue-4.9/cifs-fix-leak-in-fsctl_enum_snaps-response-handling.patch