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    Subject[PATCH 4.4 14/41] powerpc/pseries: Fix parent_dn reference leak in add_dt_node()
    Date
    4.4-stable review patch.  If anyone has any objections, please let me know.

    ------------------

    From: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>

    commit b537ca6fede69a281dc524983e5e633d79a10a08 upstream.

    A reference to the parent device node is held by add_dt_node() for the
    node to be added. If the call to dlpar_configure_connector() fails
    add_dt_node() returns ENOENT and that reference is not freed.

    Add a call to of_node_put(parent_dn) prior to bailing out after a
    failed dlpar_configure_connector() call.

    Fixes: 8d5ff320766f ("powerpc/pseries: Make dlpar_configure_connector parent node aware")
    Signed-off-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com>
    Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    arch/powerpc/platforms/pseries/mobility.c | 4 +++-
    1 file changed, 3 insertions(+), 1 deletion(-)

    --- a/arch/powerpc/platforms/pseries/mobility.c
    +++ b/arch/powerpc/platforms/pseries/mobility.c
    @@ -225,8 +225,10 @@ static int add_dt_node(__be32 parent_pha
    return -ENOENT;

    dn = dlpar_configure_connector(drc_index, parent_dn);
    - if (!dn)
    + if (!dn) {
    + of_node_put(parent_dn);
    return -ENOENT;
    + }

    rc = dlpar_attach_node(dn);
    if (rc)

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