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cifs: fix handle leak in smb2_query_symlink()

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commit e6d0fb7b34 upstream.

If we enter smb2_query_symlink() for something that is not a symlink
and where the SMB2_open() would succeed we would never end up
closing this handle and would thus leak a handle on the server.

Fix this by immediately calling SMB2_close() on successfull open.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
CC: Stable <stable@vger.kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ronnie Sahlberg
2019-04-10 07:47:22 +10:00
committed by Greg Kroah-Hartman
parent c69330a855
commit 2fcee5eaae
1 changed files with 2 additions and 0 deletions
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2
fs/cifs/smb2ops.c
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@@ -1906,6 +1906,8 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
&resp_buftype);
if (!rc)
SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
if (!rc || !err_iov.iov_base) {
rc = -ENOENT;
goto free_path;