From: Paulo Alcantara <pc@xxxxxxxxxxxxx> commit 09ba47b44d26b475bbdf9c80db9e0193d2b58956 upstream. We can't call smb_init() in CIFSGetDFSRefer() as cifs_reconnect_tcon() may end up calling CIFSGetDFSRefer() again to get new DFS referrals and thus causing an infinite recursion. Signed-off-by: Paulo Alcantara (SUSE) <pc@xxxxxxxxxxxxx> Reviewed-by: Ronnie Sahlberg <lsahlber@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # 6.2 Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/cifs/cifssmb.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -4319,8 +4319,13 @@ CIFSGetDFSRefer(const unsigned int xid, return -ENODEV; getDFSRetry: - rc = smb_init(SMB_COM_TRANSACTION2, 15, ses->tcon_ipc, (void **) &pSMB, - (void **) &pSMBr); + /* + * Use smb_init_no_reconnect() instead of smb_init() as + * CIFSGetDFSRefer() may be called from cifs_reconnect_tcon() and thus + * causing an infinite recursion. + */ + rc = smb_init_no_reconnect(SMB_COM_TRANSACTION2, 15, ses->tcon_ipc, + (void **)&pSMB, (void **)&pSMBr); if (rc) return rc;
