On Tue, Nov 1, 2016 at 10:28 AM, Jakub Kicinski [off-list ref] wrote:

unreferenced object 0xffff8807389cba28 (size 128):
  comm "swapper/0", pid 1, jiffies 4294898463 (age 781.332s)
  hex dump (first 32 bytes):
    6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
    6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b  kkkkkkkkkkkkkkkk
  backtrace:
    [<ffffffff85decad8>] kmemleak_alloc+0x28/0x50
    [<ffffffff84771246>] __kmalloc+0x206/0x5a0
    [<ffffffff859e1261>] genl_register_family+0x711/0x11d0
    [<ffffffff888d9524>] netlbl_mgmt_genl_init+0x10/0x12
    [<ffffffff888d91e8>] netlbl_netlink_init+0x9/0x26
    [<ffffffff888d9254>] netlbl_init+0x4f/0x85
    [<ffffffff840022b7>] do_one_initcall+0xb7/0x2a0
    [<ffffffff887f9102>] kernel_init_freeable+0x597/0x636
    [<ffffffff85de7793>] kernel_init+0x13/0x140
    [<ffffffff85e0246a>] ret_from_fork+0x2a/0x40

Looks like we are missing a kfree(family->attrbuf); on error path,
but it is not related to Johannes' recent patches.

Could the attached patch help?

Thanks.