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Date:   Thu, 14 May 2020 15:13:11 -0700 (PDT)
From:   David Miller <>
Subject: Re: [PATCH net] tcp: fix error recovery in tcp_zerocopy_receive()

From: Eric Dumazet <>
Date: Thu, 14 May 2020 13:58:13 -0700

> If user provides wrong virtual address in TCP_ZEROCOPY_RECEIVE
> operation we want to return -EINVAL error.
> But depending on zc->recv_skip_hint content, we might return
> -EIO error if the socket has SOCK_DONE set.
> Make sure to return -EINVAL in this case.
> BUG: KMSAN: uninit-value in tcp_zerocopy_receive net/ipv4/tcp.c:1833 [inline]
> Fixes: 05255b823a61 ("tcp: add TCP_ZEROCOPY_RECEIVE support for zerocopy receive")
> Signed-off-by: Eric Dumazet <>
> Reported-by: syzbot <>

Series applied and queued up for -stable, thanks.

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