From: David Miller <davem@davemloft.net>
To: dsahern@gmail.com
Cc: netdev@vger.kernel.org, xiyou.wangcong@gmail.com
Subject: Re: [PATCH v2 net-next] tcp: Check daddr_cache before use in tracepoint
Date: Wed, 18 Oct 2017 14:15:40 +0100 (WEST) [thread overview]
Message-ID: <20171018.141540.2101290573491932828.davem@davemloft.net> (raw)
In-Reply-To: <1508193127-17626-1-git-send-email-dsahern@gmail.com>
From: David Ahern <dsahern@gmail.com>
Date: Mon, 16 Oct 2017 15:32:07 -0700
> Running perf in one window to capture tcp_retransmit_skb tracepoint:
> $ perf record -e tcp:tcp_retransmit_skb -a
>
> And causing a retransmission on an active TCP session (e.g., dropping
> packets in the receiver, changing MTU on the interface to 500 and back
> to 1500) triggers a panic:
...
> Check that daddr_cache is non-NULL before de-referencing.
>
> Fixes: e086101b150a ("tcp: add a tracepoint for tcp retransmission")
> Signed-off-by: David Ahern <dsahern@gmail.com>
Applied.
next prev parent reply other threads:[~2017-10-18 13:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-10-16 22:32 [PATCH v2 net-next] tcp: Check daddr_cache before use in tracepoint David Ahern
2017-10-16 22:35 ` Cong Wang
2017-10-18 13:15 ` David Miller [this message]
2017-10-18 14:54 ` David Ahern
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