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    Subject[PATCH 3.18 039/121] block: fix an error code in add_partition()
    Date
    3.18-stable review patch.  If anyone has any objections, please let me know.

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

    From: Dan Carpenter <dan.carpenter@oracle.com>


    [ Upstream commit 7bd897cfce1eb373892d35d7f73201b0f9b221c4 ]

    We don't set an error code on this path. It means that we return NULL
    instead of an error pointer and the caller does a NULL dereference.

    Fixes: 6d1d8050b4bc ("block, partition: add partition_meta_info to hd_struct")
    Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
    Signed-off-by: Jens Axboe <axboe@fb.com>
    Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    block/partition-generic.c | 4 +++-
    1 file changed, 3 insertions(+), 1 deletion(-)

    --- a/block/partition-generic.c
    +++ b/block/partition-generic.c
    @@ -309,8 +309,10 @@ struct hd_struct *add_partition(struct g

    if (info) {
    struct partition_meta_info *pinfo = alloc_part_info(disk);
    - if (!pinfo)
    + if (!pinfo) {
    + err = -ENOMEM;
    goto out_free_stats;
    + }
    memcpy(pinfo, info, sizeof(*info));
    p->info = pinfo;
    }

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