Merge tag 'net-6.10-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Including fixes from bpf and netfilter.

  Current release - regressions:

   - core: fix rc7's __skb_datagram_iter() regression

  Current release - new code bugs:

   - eth: bnxt: fix crashes when reducing ring count with active RSS
     contexts

  Previous releases - regressions:

   - sched: fix UAF when resolving a clash

   - skmsg: skip zero length skb in sk_msg_recvmsg2

   - sunrpc: fix kernel free on connection failure in
     xs_tcp_setup_socket

   - tcp: avoid too many retransmit packets

   - tcp: fix incorrect undo caused by DSACK of TLP retransmit

   - udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().

   - eth: ks8851: fix deadlock with the SPI chip variant

   - eth: i40e: fix XDP program unloading while removing the driver

  Previous releases - always broken:

   - bpf:
       - fix too early release of tcx_entry
       - fail bpf_timer_cancel when callback is being cancelled
       - bpf: fix order of args in call to bpf_map_kvcalloc

   - netfilter: nf_tables: prefer nft_chain_validate

   - ppp: reject claimed-as-LCP but actually malformed packets

   - wireguard: avoid unaligned 64-bit memory accesses"

* tag 'net-6.10-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (33 commits)
  net, sunrpc: Remap EPERM in case of connection failure in xs_tcp_setup_socket
  net/sched: Fix UAF when resolving a clash
  net: ks8851: Fix potential TX stall after interface reopen
  udp: Set SOCK_RCU_FREE earlier in udp_lib_get_port().
  netfilter: nf_tables: prefer nft_chain_validate
  netfilter: nfnetlink_queue: drop bogus WARN_ON
  ethtool: netlink: do not return SQI value if link is down
  ppp: reject claimed-as-LCP but actually malformed packets
  selftests/bpf: Add timer lockup selftest
  net: ethernet: mtk-star-emac: set mac_managed_pm when probing
  e1000e: fix force smbus during suspend flow
  tcp: avoid too many retransmit packets
  bpf: Defer work in bpf_timer_cancel_and_free
  bpf: Fail bpf_timer_cancel when callback is being cancelled
  bpf: fix order of args in call to bpf_map_kvcalloc
  net: ethernet: lantiq_etop: fix double free in detach
  i40e: Fix XDP program unloading while removing the driver
  net: fix rc7's __skb_datagram_iter()
  net: ks8851: Fix deadlock with the SPI chip variant
  octeontx2-af: Fix incorrect value output on error path in rvu_check_rsrc_availability()
  ...

2 files changed, 4 insertions, 2 deletions

diff --git a/net/core/datagram.c b/net/core/datagram.c
index e9ba4c7b449d..e72dd78471a6 100644
--- a/net/core/datagram.c
+++ b/net/core/datagram.c
@@ -423,11 +423,12 @@ static int __skb_datagram_iter(const struct sk_buff *skb, int offset,
 			if (copy > len)
 				copy = len;
 
+			n = 0;
 			skb_frag_foreach_page(frag,
 					      skb_frag_off(frag) + offset - start,
 					      copy, p, p_off, p_len, copied) {
 				vaddr = kmap_local_page(p);
-				n = INDIRECT_CALL_1(cb, simple_copy_to_iter,
+				n += INDIRECT_CALL_1(cb, simple_copy_to_iter,
 					vaddr + p_off, p_len, data, to);
 				kunmap_local(vaddr);
 			}
diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index fd20aae30be2..bbf40b999713 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -434,7 +434,8 @@ int sk_msg_recvmsg(struct sock *sk, struct sk_psock *psock, struct msghdr *msg,
 			page = sg_page(sge);
 			if (copied + copy > len)
 				copy = len - copied;
-			copy = copy_page_to_iter(page, sge->offset, copy, iter);
+			if (copy)
+				copy = copy_page_to_iter(page, sge->offset, copy, iter);
 			if (!copy) {
 				copied = copied ? copied : -EFAULT;
 				goto out;