Re: [PATCH] fix dst_entry leak in icmp_push_reply()

[Patrick McHardy <kaber@trash.net>]

Ollie Wild wrote:
> Patrick McHardy wrote:
> 
>> Ollie Wild wrote:
>>
>>> If the ip_append_data() call in icmp_push_reply() fails,
>>> ip_flush_pending_frames() needs to be called.  Otherwise, ip_rt_put()
>>> is never called on inet_sk(icmp_socket->sk)->cork.rt, which prevents
>>> the route (and net_device) from ever being freed.
>>
>> Your patch doesn't fit your description, the else-condition you're
>> adding triggers when the queue is empty, so what is the point?
> 
> Since we're only calling ip_append_data() once here, the two conditions
> are identical.

You're right, I misread your patch. It would be easier to understand
if you just checked the return value of ip_append_data, as done in
udp.c or raw.c.