memory leak in qrtr_create

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    13391c60 Merge branch 'linus' of git://git.kernel.org/pub/..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15eb761b500000
kernel config:  https://syzkaller.appspot.com/x/.config?x=e7e6ee96c9292f22
dashboard link: https://syzkaller.appspot.com/bug?extid=35a511c72ea7356cdcf3
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=103c58a0d00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1040bc54d00000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+35a511c72ea7356cdcf3@xxxxxxxxxxxxxxxxxxxxxxxxx

Warning: Permanently added '10.128.0.186' (ECDSA) to the list of known hosts.
executing program
executing program
BUG: memory leak
unreferenced object 0xffff88810127da40 (size 824):
  comm "syz-executor472", pid 8431, jiffies 4294942269 (age 13.980s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    2a 00 01 40 00 00 00 00 00 00 00 00 00 00 00 00  *..@............
  backtrace:
    [<0000000041c0b1fe>] sk_prot_alloc+0x3e/0x1c0 net/core/sock.c:1679
    [<00000000f73c2f2d>] sk_alloc+0x30/0x3f0 net/core/sock.c:1739
    [<0000000069049cba>] qrtr_create+0x4d/0xb0 net/qrtr/qrtr.c:1258
    [<0000000077afae5e>] __sock_create+0x1ab/0x2b0 net/socket.c:1406
    [<000000007f58f353>] sock_create net/socket.c:1457 [inline]
    [<000000007f58f353>] __sys_socket+0x6f/0x140 net/socket.c:1499
    [<00000000217ba93a>] __do_sys_socket net/socket.c:1508 [inline]
    [<00000000217ba93a>] __se_sys_socket net/socket.c:1506 [inline]
    [<00000000217ba93a>] __x64_sys_socket+0x1a/0x20 net/socket.c:1506
    [<00000000632eec5e>] do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
    [<00000000a6403a3c>] entry_SYSCALL_64_after_hwframe+0x44/0xa9



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