bpf, sockmap: Fix data loss caused by using apply_bytes on ingress redirect

stable inclusion
from stable-v5.10.163
commit c58df40e3e67fd7603290b5dd24c47cdc1f9ef74
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6AVM6
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=c58df40e3e67fd7603290b5dd24c47cdc1f9ef74



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[ Upstream commit 9072931f ]

Use apply_bytes on ingress redirect, when apply_bytes is less than
the length of msg data, some data may be skipped and lost in
bpf_tcp_ingress().

If there is still data in the scatterlist that has not been consumed,
we cannot move the msg iter.

Fixes: 604326b4 ("bpf, sockmap: convert to generic sk_msg interface")
Signed-off-by: Pengcheng Yang <yangpc@wangsu.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Jakub Sitnicki <jakub@cloudflare.com>
Link: https://lore.kernel.org/bpf/1669718441-2654-4-git-send-email-yangpc@wangsu.com


Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Wang Hai <wanghai38@huawei.com>
Signed-off-by: Liu Jian <liujian56@huawei.com>