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| author | David Disseldorp <ddiss@suse.de> | 2017-05-04 01:41:13 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-20 15:28:40 +0300 |
| commit | 6f3b2eed8c9ad3656c60295589c1a17709e456ca (patch) | |
| tree | 439324a615643c3955c3d0462597f206272400d4 /fs/cifs | |
| parent | f13d96bf98c2ba94968bbaf207f2af02290a979a (diff) | |
| download | linux-6f3b2eed8c9ad3656c60295589c1a17709e456ca.tar.xz | |
cifs: fix CIFS_IOC_GET_MNT_INFO oops
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@suse.de>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/ioctl.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c index b52b7ffa6d34..bdba9e7a9438 100644 --- a/fs/cifs/ioctl.c +++ b/fs/cifs/ioctl.c @@ -264,6 +264,8 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) 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; |