[PATCH -next v3] netlabel: Fix memory leak in netlbl_mgmt_add_common

[patchwork-bot+netdevbpf at kernel.org]

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Tue, 15 Jun 2021 10:14:44 +0800 you wrote:
> Hulk Robot reported memory leak in netlbl_mgmt_add_common.
> The problem is non-freed map in case of netlbl_domhsh_add() failed.
> 
> BUG: memory leak
> unreferenced object 0xffff888100ab7080 (size 96):
>   comm "syz-executor537", pid 360, jiffies 4294862456 (age 22.678s)
>   hex dump (first 32 bytes):
>     05 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
>     fe 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01  ................
>   backtrace:
>     [<0000000008b40026>] netlbl_mgmt_add_common.isra.0+0xb2a/0x1b40
>     [<000000003be10950>] netlbl_mgmt_add+0x271/0x3c0
>     [<00000000c70487ed>] genl_family_rcv_msg_doit.isra.0+0x20e/0x320
>     [<000000001f2ff614>] genl_rcv_msg+0x2bf/0x4f0
>     [<0000000089045792>] netlink_rcv_skb+0x134/0x3d0
>     [<0000000020e96fdd>] genl_rcv+0x24/0x40
>     [<0000000042810c66>] netlink_unicast+0x4a0/0x6a0
>     [<000000002e1659f0>] netlink_sendmsg+0x789/0xc70
>     [<000000006e43415f>] sock_sendmsg+0x139/0x170
>     [<00000000680a73d7>] ____sys_sendmsg+0x658/0x7d0
>     [<0000000065cbb8af>] ___sys_sendmsg+0xf8/0x170
>     [<0000000019932b6c>] __sys_sendmsg+0xd3/0x190
>     [<00000000643ac172>] do_syscall_64+0x37/0x90
>     [<000000009b79d6dc>] entry_SYSCALL_64_after_hwframe+0x44/0xae
> 
> [...]

Here is the summary with links:
  - [-next,v3] netlabel: Fix memory leak in netlbl_mgmt_add_common
    https://git.kernel.org/netdev/net-next/c/b8f6b0522c29

You are awesome, thank you!
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