pull-request: bpf 2021-06-23

[Daniel Borkmann <daniel@iogearbox.net>]

Hi David, hi Jakub,

The following pull-request contains BPF updates for your *net* tree.

We've added 14 non-merge commits during the last 6 day(s) which contain
a total of 13 files changed, 137 insertions(+), 64 deletions(-).

Note that when you merge net into net-next, there is a small merge conflict
between 9f2470fbc4cb ("skmsg: Improve udp_bpf_recvmsg() accuracy") from bpf
with c49661aa6f70 ("skmsg: Remove unused parameters of sk_msg_wait_data()")
from net-next. Resolution is to: i) net/ipv4/udp_bpf.c: take udp_msg_wait_data()
and remove err parameter from the function, ii) net/ipv4/tcp_bpf.c: take
tcp_msg_wait_data() and remove err parameter from the function, iii) for
net/core/skmsg.c and include/linux/skmsg.h: remove the sk_msg_wait_data()
implementation and its prototype in header.

The main changes are:

1) Fix BPF poke descriptor adjustments after insn rewrite, from John Fastabend.

2) Fix regression when using BPF_OBJ_GET with non-O_RDWR flags, from Maciej Żenczykowski.

3) Various bug and error handling fixes for UDP-related sock_map, from Cong Wang.

4) Fix patching of vmlinux BTF IDs with correct endianness, from Tony Ambardar.

5) Two fixes for TX descriptor validation in AF_XDP, from Magnus Karlsson.

6) Fix overflow in size calculation for bpf_map_area_alloc(), from Bui Quang Minh.

Please consider pulling these changes from:

  git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git

Thanks a lot!

Also thanks to reporters, reviewers and testers of commits in this pull-request:

Björn Töpel, Daniel Borkmann, Greg Kroah-Hartman, Jakub Sitnicki, Jiang 
Wang, Jiri Olsa, John Fastabend, Jussi Maki, Lorenz Bauer, Xuan Zhuo

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

The following changes since commit 1c200f832e14420fa770193f9871f4ce2df00d07:

  net: qed: Fix memcpy() overflow of qed_dcbx_params() (2021-06-17 12:14:51 -0700)

are available in the Git repository at:

  https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git 

for you to fetch changes up to 7506d211b932870155bcb39e3dd9e39fab45a7c7:

  bpf: Fix null ptr deref with mixed tail calls and subprogs (2021-06-22 14:46:39 -0700)

----------------------------------------------------------------
Bui Quang Minh (1):
      bpf: Fix integer overflow in argument calculation for bpf_map_area_alloc

Cong Wang (8):
      skmsg: Improve udp_bpf_recvmsg() accuracy
      selftests/bpf: Retry for EAGAIN in udp_redir_to_connected()
      udp: Fix a memory leak in udp_read_sock()
      skmsg: Clear skb redirect pointer before dropping it
      skmsg: Fix a memory leak in sk_psock_verdict_apply()
      skmsg: Teach sk_psock_verdict_apply() to return errors
      skmsg: Pass source psock to sk_psock_skb_redirect()
      skmsg: Increase sk->sk_drops when dropping packets

John Fastabend (1):
      bpf: Fix null ptr deref with mixed tail calls and subprogs

Maciej Żenczykowski (1):
      bpf: Fix regression on BPF_OBJ_GET with non-O_RDWR flags

Magnus Karlsson (2):
      xsk: Fix missing validation for skb and unaligned mode
      xsk: Fix broken Tx ring validation

Tony Ambardar (1):
      bpf: Fix libelf endian handling in resolv_btfids

 include/linux/skmsg.h                              |  2 -
 include/net/xsk_buff_pool.h                        |  9 ++-
 kernel/bpf/devmap.c                                |  4 +-
 kernel/bpf/inode.c                                 |  2 +-
 kernel/bpf/verifier.c                              |  6 +-
 net/core/skmsg.c                                   | 82 ++++++++++------------
 net/core/sock_map.c                                |  2 +-
 net/ipv4/tcp_bpf.c                                 | 24 ++++++-
 net/ipv4/udp.c                                     |  2 +
 net/ipv4/udp_bpf.c                                 | 47 +++++++++++--
 net/xdp/xsk_queue.h                                | 11 +--
 tools/bpf/resolve_btfids/main.c                    |  3 +
 .../selftests/bpf/prog_tests/sockmap_listen.c      |  7 +-
 13 files changed, 137 insertions(+), 64 deletions(-)