From: Wang Yufen wangyufen@huawei.com

hulk inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I45UYC?from=project-issue CVE: NA

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In comp_stream_read ctx might be null, add null check to avoid oops. And delete unnecessary tcp_comp_err_abort.

Signed-off-by: Wang Yufen wangyufen@huawei.com Reviewed-by: Yue Haibing yuehaibing@huawei.com Reviewed-by: Wei Yongjun weiyongjun1@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- net/ipv4/tcp_comp.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/tcp_comp.c b/net/ipv4/tcp_comp.c index e7f6094b5aeec..f6ebe52f3f7f7 100644 --- a/net/ipv4/tcp_comp.c +++ b/net/ipv4/tcp_comp.c @@ -723,8 +723,6 @@ static int tcp_comp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len, if (!ctx->rx.decompressed) { err = tcp_comp_decompress(sk, skb); if (err < 0) { - if (err != -ENOSPC) - tcp_comp_err_abort(sk, EBADMSG); goto recv_end; } ctx->rx.decompressed = true; @@ -758,6 +756,9 @@ bool comp_stream_read(const struct sock *sk) { struct tcp_comp_context *ctx = comp_get_ctx(sk);

+ if (!ctx) + return false; + if (ctx->rx.pkt) return true;