citrix_ica - "wfica" generates deadlock in linux_sys_futex...

[Chagin Dmitry]

On Tue, Mar 08, 2016 at 10:03:50AM +0100, Nils Beyer wrote:
> Chagin Dmitry wrote:
> >>>> using 10.3-RC1 (r296451M) "wfica" from citrix_ica generates a deadlock
> >>>> in linux_sys_futex:
> >>>> ==============================================================================
> >>>> #tail -50 ktrace.wfica.log
> >>>
> >>> nice, please, do kdump -HAR -m256 > xxx.log and place a whole log
> >>> somewhere
> >> 
> >> done:
> >> 
> >>     http://www.renzel.net/_upload_/ktrace.wfica.log
> >
> > thanks, do u have same log but for working wfica?
> 
> here (kernel from 10.2-RELEASE):
> 
>     http://www.renzel.net/_upload_/ktrace.wfica.working.log.gz
>
so, my assumptions confirmed, in kernel from 10.2:

  1649 100695 wfica    0.000042 CALL  L32  linux_ipc(0x2,0x1e240,0x1,0x7b6,0,0x2d4ca598)
  1649 100695 wfica    0.000010 RET   L32  linux_ipc  65536/0x10000
						^^^^^ succeded

  1649 100695 wfica    0.000007 CALL  L32  linux_ipc(0x3,0x10000,0,0x111,0x2d4ca588,0x2d4ca598)
  1649 100695 wfica    0.000008 RET   L32  linux_ipc  0



in new kernel:

  1828 100750 wfica    0.000031 CALL  L32  linux_ipc(0x2,0x1e240,0x1,0x7b6,0,0x2d4cb598)
  1828 100750 wfica    0.000010 RET   L32  linux_ipc  -1 errno 17 File exists
  1828 100750 wfica    0.000008 CALL  L32  linux_ipc(0x2,0x1e240,0x1,0x1b6,0,0x2d4cb598)
  1828 100750 wfica    0.000007 RET   L32  linux_ipc  65536/0x10000

this is strange as no ipc changes are made in stable/10