Linux 4.19.35

Merge 78 patches from 4.19.35 stable
branch (102 total) beside 24 already merged patches:
ea06796 ipv6: Fix dangling pointer when ipv6 fragment
42f1fa0 ipv6: sit: reset ip header pointer in ipip6_rcv
80c2058 net: ethtool: not call vzalloc for zero sized memory request
53a1906 net/mlx5: Decrease default mr cache size
a1c2f32 netns: provide pure entropy for net_hash_mix()
78b4bf2 net: rds: force to destroy connection if t_sock is NULL in rds_tcp_kill_sock().
eeedfa9 net/sched: fix ->get helper of the matchall cls
ec0e32d openvswitch: fix flow actions reallocation
8734958 sctp: initialize _pad of sockaddr_in before copying to user memory
7243e352 tcp: fix a potential NULL pointer dereference in tcp_sk_exit
9441317 net/mlx5e: Fix error handling when refreshing TIRs
c297e88 net/mlx5e: Add a lock on tir list
55a7f7b net: core: netif_receive_skb_list: unlist skb before passing to pt->func
eab8650 net: mlx5: Add a missing check on idr_find, free buf
e2d92a7 net/mlx5e: Update xoff formula
da9b353 net/mlx5e: Update xon formula
3412671 lib/string.c: implement a basic bcmp
c2d27b3 netfilter: nfnetlink_cttimeout: pass default timeout policy to obj_to_nlattr
40177a7 netfilter: nfnetlink_cttimeout: fetch timeouts for udplite and gre, too
ed52b07 ACPICA: Clear status of GPEs before enabling them
43f4733 mm: writeback: use exact memcg dirty counts
543bb48 block: fix the return errno for direct IO
119031b KVM: x86: nVMX: close leak of L0's x2APIC MSRs (CVE-2019-3887)
59bf185 KVM: x86: nVMX: fix x2APIC VTPR read intercept

Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>