[CRIU] Restore of loginuid doesn't work

[Pavel Emelyanov]

On 12/18/2015 08:22 PM, Stanislav Kinsburskiy wrote:
> Hello,
> 
> I'm trying to run zdtm tests on Fedora 22, kernel 4.0.4., criu is up to 
> date.

Just to be 100% sure. Is today's commit 95cb2ddb9ed4e4dc58975162b8fc5353ad615c2c
in your tree?

(Also Cc-ing the loginuid author)

> A bunch of tests are failing because of loginud restore.
> All these tests are failing, when running in user namespace.
> Here are examples:
> 
> =================== Run zdtm/live/static/write_read10 in uns 
> ===================
> Start test
> ./write_read10 --pidfile=write_read10.pid --outfile=write_read10.out 
> --filename=write_read10.test
> Run criu dump
> Run criu restore
> =[log]=> dump/zdtm/live/static/write_read10/259/1/restore.log
> ------------------------ grep Error ------------------------
> (00.341385)      5: Error (cr-restore.c:869): Can't open 5/loginuid on 
> procfs: Permission denied
> (00.341442)      4: Error (cr-restore.c:869): Can't open 4/loginuid on 
> procfs: Permission denied
> (00.350631) Error (cr-restore.c:1323): 280 exited, status=1
> (00.350689) Error (files-reg.c:445):  `- XFail 
> [/zdtm/live/static/write_read10.test.cr.1.ghost] ghost: No such file or 
> directory
> (00.350692) Error (files-reg.c:445):  `- XFail 
> [/zdtm/live/static/write_read10.test.cr.1.ghost] ghost: No such file or 
> directory
> (00.362827) Error (cr-restore.c:2106): Restoring FAILED.
> ------------------------ ERROR OVER ------------------------
> ########### Test zdtm/live/static/write_read10 FAIL at CRIU restore 
> ############
> ##################################### FAIL 
> #####################################
> 
> or this one:
> 
> ================== Run zdtm/live/static/unlink_mmap00 in uns 
> ===================
> Start test
> ./unlink_mmap00 --pidfile=unlink_mmap00.pid --outfile=unlink_mmap00.out 
> --filename=unlink_mmap00.test
> Run criu dump
> Run criu restore
> =[log]=> dump/zdtm/live/static/unlink_mmap00/256/1/restore.log
> ------------------------ grep Error ------------------------
> (00.342840)      4: Error (cr-restore.c:869): Can't open 4/loginuid on 
> procfs: Permission denied
> (00.352313) Error (cr-restore.c:1323): 276 exited, status=1
> (00.352373) Error (files-reg.c:445):  `- XFail 
> [/zdtm/live/static/unlink_mmap00.test.cr.1.ghost] ghost: No such file or 
> directory
> (00.364723) Error (cr-restore.c:2106): Restoring FAILED.
> ------------------------ ERROR OVER ------------------------
> ########### Test zdtm/live/static/unlink_mmap00 FAIL at CRIU restore 
> ###########
> ##################################### FAIL 
> #####################################
> 
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