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 -------------------------------- [ 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: NPengcheng Yang <yangpc@wangsu.com> Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net> Acked-by: NJakub Sitnicki <jakub@cloudflare.com> Link: https://lore.kernel.org/bpf/1669718441-2654-4-git-send-email-yangpc@wangsu.comSigned-off-by: NSasha Levin <sashal@kernel.org> Signed-off-by: NWang Hai <wanghai38@huawei.com> Signed-off-by: NLiu Jian <liujian56@huawei.com>
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