• Johan Hovold's avatar
    USB: serial: mos7720: fix NULL-deref at open · f2e8b37a
    Johan Hovold authored
    commit b05aebc2 upstream.
    
    Fix NULL-pointer dereference at port open if a device lacks the expected
    bulk in and out endpoints.
    
    Unable to handle kernel NULL pointer dereference at virtual address 00000030
    ...
    [<bf071c20>] (mos7720_open [mos7720]) from [<bf0490e0>] (serial_port_activate+0x68/0x98 [usbserial])
    [<bf0490e0>] (serial_port_activate [usbserial]) from [<c0470ca4>] (tty_port_open+0x9c/0xe8)
    [<c0470ca4>] (tty_port_open) from [<bf049d98>] (serial_open+0x48/0x6c [usbserial])
    [<bf049d98>] (serial_open [usbserial]) from [<c0469178>] (tty_open+0xcc/0x5cc)
    
    Fixes: 0f64478c ("USB: add USB serial mos7720 driver")
    Signed-off-by: default avatarJohan Hovold <johan@kernel.org>
    Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
    f2e8b37a
mos7720.c 57.4 KB