An open directory may have a NULL private_data pointer prior to readdir.
Fixes: 0de1f4c6f6c0 ("Add way to query server fs info for smb3")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: David Disseldorp <ddiss@xxxxxxx>
---
fs/cifs/ioctl.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/fs/cifs/ioctl.c b/fs/cifs/ioctl.c
index 4d598a71cf84..76fb0917dc8c 100644
--- a/fs/cifs/ioctl.c
+++ b/fs/cifs/ioctl.c
@@ -209,6 +209,8 @@ 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;
--
2.12.0
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