Interrupt process in samba share mounted folder breaks mount

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http://unix.stackexchange.com – I can successfully mount a Samba share on a local folder in Opensuse 12.1: sudo mount -t cifs -o username=<username>,password=<password> //<win-box>/<share> <mountpoint> The problem comes if i interrupt (^C) for example a long cp process in <mountpoint>: I get > cp -r BIG_FOLDER/ /tmp ^C > ls ls: reading directory .: Permission denied The only solution I found is to sudo umount <mountpoint> then mount again. Any advice is welcome! (HowTos)