[Varnish] #51: crash in cache_acceptor_epoll.c

[Varnish]

#51: crash in cache_acceptor_epoll.c
----------------------+-----------------------------------------------------
 Reporter:  airmax    |        Owner:  des     
     Type:  defect    |       Status:  assigned
 Priority:  high      |    Milestone:          
Component:  varnishd  |      Version:  1.0     
 Severity:  blocker   |   Resolution:          
 Keywords:            |  
----------------------+-----------------------------------------------------
Comment (by airmax):

 I tried the patch. The Foundry Load Balancer probes are now harmless, are
 are at least less poisoned.

 But, I still get a crash, at the same point. Good news (or bad news for
 debug), is that now I have to wait 3-4 minutes (at around 40 req/s of
 mostly very small files with 70% been served from cache) to get it :
 {{{
 Child said (2, 21175): <<Assert error in vca_del(), cache_acceptor_epoll.c
 line 66:
   Condition((epoll_ctl(epfd, 2, fd, ((void *)0))) == 0) not true.
   errno = 14 (Bad address)
 }}}

 strace log becomes big, but I could see :
 {{{
 21446 epoll_ctl(11, EPOLL_CTL_ADD, 19, {EPOLLIN|EPOLLPRI, {u32=2234740644,
 u64=2234740644}}) = 0
 }}}
 And :
 {{{
 epoll_ctl(11, EPOLL_CTL_DEL, 19, NULL) = -1 EFAULT (Bad address)
 }}}
 And no close(19) between them.

 Don't know if it's of any interest, but the request was a flash anim using
 Opera 9.00 on windows (if I'm not mistaken by 60 mb of syscall log):
 {{{
 21582 writev(23, [{"GET", 3}, {" ", 1}, {"/images/anim.swf?=&", 19}, {" ",
 1}, {"HTTP/1.0", 8}, {"\r\n", 2}, {"User-Agent: Opera/9.00 (Windows "...,
 46}, {"\r\n", 2}, {"Host: www.newhentai.com", 23}, {"\r\n", 2}, {"Accept:
 text/html, application/x"..., 125}, {"\r\n", 2}, {"Accept-Language:
 fr,en;q=0.9", 28}, {"\r\n", 2}, {"Accept-Charset: iso-8859-1, utf-"...,
 50}, {"\r\n", 2}, {"Accept-Encoding: deflate, gzip, "..., 55}, {"\r\n",
 2}, {"Referer: http://www.newhentai.co"..., 74}, {"\r\n", 2}, {"Cookie:
 dstest=", 15}, {"\r\n", 2}, {"Cookie2: $Version=1", 19}, {"\r\n", 2},
 {"X-Varnish: 999737522", 20}, {"\r\n", 2}, {"\r\n", 2}], 27) = 511
 }}}

-- 
Ticket URL: <http://varnish.projects.linpro.no/ticket/51>
Varnish <http://varnish.projects.linpro.no/>
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