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| author | David Disseldorp <ddiss@suse.de> | 2017-05-03 18:39:08 +0300 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2017-05-03 17:59:20 +0300 |
| commit | 6026685de33b0db5b2b6b0e9b41b3a1a3261033c (patch) | |
| tree | 01c0c2fcf7cc95eb8c29b3664e54addf146a5987 /fs/cifs/ioctl.c | |
| parent | 0e5c795592930d51fd30d53a2e7b73cba022a29b (diff) | |
| download | linux-6026685de33b0db5b2b6b0e9b41b3a1a3261033c.tar.xz | |
cifs: fix CIFS_ENUMERATE_SNAPSHOTS oops
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.
Fixes: 834170c85978 ("Enable previous version support")
Signed-off-by: David Disseldorp <ddiss@suse.de>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/ioctl.c')
| -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 7f4bba574930..4d598a71cf84 100644 --- a/fs/cifs/ioctl.c +++ b/fs/cifs/ioctl.c @@ -213,6 +213,8 @@ long cifs_ioctl(struct file *filep, unsigned int command, unsigned long arg) 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; |