On 02/20/2019 08:19 AM, Vasily Averin wrote:
> Thank you for explanation,
> though this happen in real life and triggers BUG_ON only if receiving side is
> located on the same host.
> Is it probably makes sense to add WARN_ON into skb_can_coalesce to detect
> such cases?
Yes, but please do
On 2/20/19 6:53 PM, Eric Dumazet wrote:
> On 02/20/2019 05:34 AM, Vasily Averin wrote:
>> Dear David,
>>
>> currently do_tcp_sendpages() calls skb_can_coalesce() to merge proper tcp
>> fragments.
>> If these fragments are slab objects and the data is not transferred out of
>> the local host
>> th
On 02/20/2019 05:34 AM, Vasily Averin wrote:
> Dear David,
>
> currently do_tcp_sendpages() calls skb_can_coalesce() to merge proper tcp
> fragments.
> If these fragments are slab objects and the data is not transferred out of
> the local host
> then tcp_recvmsg() can crash host on BUG_ON (se
