This is a note to let you know that I've just added the patch titled
cifs: fix CIFS_IOC_GET_MNT_INFO 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_ioc_get_mnt_info-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 <stable@xxxxxxxxxxxxxxx> know about it.
>From d8a6e505d6bba2250852fbc1c1c86fe68aaf9af3 Mon Sep 17 00:00:00 2001
From: David Disseldorp <ddiss@xxxxxxx>
Date: Thu, 4 May 2017 00:41:13 +0200
Subject: cifs: fix CIFS_IOC_GET_MNT_INFO oops
From: David Disseldorp <ddiss@xxxxxxx>
commit d8a6e505d6bba2250852fbc1c1c86fe68aaf9af3 upstream.
An open directory may have a NULL private_data pointer prior to readdir.
Fixes: 0de1f4c6f6c0 ("Add way to query server fs info for smb3")
Signed-off-by: David Disseldorp <ddiss@xxxxxxx>
Signed-off-by: Steve French <smfrench@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/ioctl.c | 2 ++
1 file changed, 2 insertions(+)
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -264,6 +264,8 @@ long cifs_ioctl(struct file *filep, unsi
rc = -EOPNOTSUPP;
break;
case CIFS_IOC_GET_MNT_INFO:
+ if (pSMBFile == NULL)
+ break;
tcon = tlink_tcon(pSMBFile->tlink);
rc = smb_mnt_get_fsinfo(xid, tcon, (void __user *)arg);
break;
Patches currently in stable-queue which might be from ddiss@xxxxxxx 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