* CygWin / Sshd / ssh-keygen hangs [not found] <475030844.772124.1588585159800.ref@mail.yahoo.com> @ 2020-05-04 9:39 ` Cezar Damian 2020-05-04 15:42 ` Andrey Repin 0 siblings, 1 reply; 4+ messages in thread From: Cezar Damian @ 2020-05-04 9:39 UTC (permalink / raw) To: cygwin HI, When trying to run ssh-keygen or sshd from Cygwin bashboth of them are hanging. Wehave the following configuration : - CygWin – latest version - Openssh – latest available version - OS – W10 running in a VMWare environment When attaching with gdb to the process, I can see thatssh-keygen threads are waiting for something ( see below ) and the program isblocked in pthread_setspecific (). Do you have any idea what is causing such a behaviorand how can we: - Work around it - Understand what causes it ? Thank you, Cezar Damian (gdb) info threads Id TargetId Frame 1 Thread 14616.0x2ccc0x00007ffa62e30154 in ntdll!ZwWaitForSingleObject () from/cygdrive/c/Windows/SYSTEM32/ntdll.dll 2 Thread 14616.0x3d0c0x00007ffa62e339e4 in ntdll!ZwWaitForWorkViaWorkerFactory () from/cygdrive/c/Windows/SYSTEM32/ntdll.dll 3 Thread 14616.0x12c40x00007ffa62e339e4 in ntdll!ZwWaitForWorkViaWorkerFactory () from/cygdrive/c/Windows/SYSTEM32/ntdll.dll 4 Thread 14616.0x32ac0x00007ffa62e339e4 in ntdll!ZwWaitForWorkViaWorkerFactory () from/cygdrive/c/Windows/SYSTEM32/ntdll.dll * 5 Thread 14616.0x33040x0000000000000000 in ?? () 6 Thread 14616.0x38a80x00007ffa62e30194 in ntdll!ZwReadFile () from /cygdrive/c/Windows/SYSTEM32/ntdll.dll 7 Thread 14616.0x8f0 0x00007ffa62e30c24 in ntdll!ZwWaitForMultipleObjects () from/cygdrive/c/Windows/SYSTEM32/ntdll.dll 8 Thread 14616.0x3d540x00007ffa62e30c24 in ntdll!ZwWaitForMultipleObjects () from /cygdrive/c/Windows/SYSTEM32/ntdll.dll 9 Thread 14616.0x1ab40x00007ffa62dbec08 in ntdll!LdrShutdownThread () from/cygdrive/c/Windows/SYSTEM32/ntdll.dll (gdb) backtrace full #0 0x0000000000000000 in ?? () No symbol table info available. #1 0x0000000180163eb0 in pthread_setspecific ()at /usr/src/debug/cygwin-3.1.4-1/winsup/cygwin/thread.cc:2858 pthread_key::keys = {mx = {lock_counter = 0, win32_obj_id = 0xcc}, head =0x800064fb0} pthread_rwlock::rwlocks= {mx = {lock_counter = 0, win32_obj_id = 0xc8}, head = 0x8000659a0} pthread::threads = {mx = {lock_counter = 0, win32_obj_id = 0xbc}, head =0x800000010} pthread_mutex::mutex_initialization_lock = {lock_counter = 0, win32_obj_id =0x254} pthread_null::_instance = {<pthread> = {<verifyable_object> = { _vptr.verifyable_object = 0x1802bdea0 <vtable for pthread_null+16>, magic= 0}, win32_obj_id = 0x0, attr = {<verifyable_object> = {_vptr.verifyable_object =0x1802bde60 <vtable for pthread_attr+16>, magic = 3742232648}, joinable = 1, contentionscope = 0, inheritsched = 0, schedparam ={sched_priority = 0}, stackaddr = 0x0, stacksize = 0, guardsize= 12288, name = 0x0}, function = 0x0, arg = 0x0, return_ptr = 0x0, valid =false, suspended = false, canceled = false, cancelstate = 0, canceltype = 0, cygtls = 0x0, cancel_event =0x0, joiner = 0x0, next = 0x0, static threads = {mx = {lock_counter = 0, win32_obj_id =0xbc}, head = 0x800000010}, thread_id = 0, cleanup_stack = 0x0, mutex = {<verifyable_object> = {_vptr.verifyable_object = 0x1802bed20<vtable for pthread_mutex+16>, magic = 3742232646}, next = 0x0, lock_counter = 0, win32_obj_id = 0xd8, owner = 0x1, static_new_mutex = 0x1, static _unlocked_mutex = 0x2, static _destroyed_mutex = 0x3, recursion_counter = 0, condwaits = 0, type = 2,pshared = 0, static mutexes = {mx = { lock_counter = 0, win32_obj_id = 0xd0}, head = 0x800065b38}, staticmutex_initialization_lock = {lock_counter = 0, win32_obj_id = 0x254}}, parent_sigmask = 0}, static _instance ={<pthread> = {<verifyable_object> = { _vptr.verifyable_object = 0x1802bdea0 <vtable for pthread_null+16>, magic= 0}, win32_obj_id = 0x0, attr = {<verifyable_object> = {_vptr.verifyable_object = 0x1802bde60<vtable for pthread_attr+16>, magic = 3742232648}, joinable= 1, contentionscope = 0, inheritsched = 0, schedparam = {sched_priority = 0},stackaddr = 0x0, stacksize = 0, guardsize = 12288, name = 0x0}, function = 0x0, arg = 0x0,return_ptr = 0x0, valid = false, suspended = false, canceled = false, cancelstate = 0, canceltype = 0, cygtls =0x0, cancel_event = 0x0, joiner = 0x0, next = 0x0, static threads = {mx = {lock_counter = 0, win32_obj_id = 0xbc},head = 0x800000010}, thread_id = 0, cleanup_stack = 0x0, mutex = {<verifyable_object> = { _vptr.verifyable_object = 0x1802bed20 <vtable for pthread_mutex+16>,magic = 3742232646}, next = 0x0, lock_counter = 0, win32_obj_id = 0xd8, owner = 0x1, static _new_mutex = 0x1,static _unlocked_mutex = 0x2, static _destroyed_mutex = 0x3, recursion_counter = 0, condwaits = 0, type = 2,pshared = 0, static mutexes = {mx = { lock_counter = 0, win32_obj_id = 0xd0}, head = 0x800065b38}, staticmutex_initialization_lock = { lock_counter = 0, win32_obj_id = 0x254}}, parent_sigmask = 0}, static _instance = <same as static member of an already seen type>}} pthread_rwlock::rwlock_initialization_lock = {lock_counter = 0, win32_obj_id =0x108} semaphore::semaphores = {mx = {lock_counter = 0, win32_obj_id = 0xd4}, head =0x0} pthread_cond::conds = {mx = {lock_counter = 0, win32_obj_id = 0xc4}, head =0x800065ad0} pthread_cond::cond_initialization_lock = {lock_counter = 0, win32_obj_id =0x104} --Type <RET> for more, q to quit, c to continuewithout paging-- pthread_mutex::mutexes = {mx = {lock_counter = 0, win32_obj_id = 0xd0}, head =0x800065b38} Backtrace stopped: Cannot access memory at address 0x0 (gdb) ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: CygWin / Sshd / ssh-keygen hangs 2020-05-04 9:39 ` CygWin / Sshd / ssh-keygen hangs Cezar Damian @ 2020-05-04 15:42 ` Andrey Repin 2020-05-06 6:10 ` Cezar Damian 0 siblings, 1 reply; 4+ messages in thread From: Andrey Repin @ 2020-05-04 15:42 UTC (permalink / raw) To: Cezar Damian, cygwin Greetings, Cezar Damian! > When trying to run ssh-keygen or sshd from Cygwin bash both of them are > hanging. > Wehave the following configuration : > > - CygWin – latest version > - Openssh – latest available version > - OS – W10 running in a VMWare environment > When attaching with gdb to the process, I can see that ssh-keygen threads > are waiting for something ( see below ) and the program is blocked in > pthread_setspecific (). > > Do you have any idea what is causing such a behaviorand how can we: > > - Work around it > - Understand what causes it ? This can be an external (to Cygwin) issue, and I see tha tyou are indeed using Cygwin's ssh-keyegen for all that I can tell, but please double-check that you aren't actually using Win10 peovided OpenSSH components. To the hangs, try running them with CYGWIN=disable_pcon for a test. > Thank you, > Cezar Damian > (gdb) info threads > Id TargetId Frame > 1 Thread 14616.0x2ccc0x00007ffa62e30154 in ntdll!ZwWaitForSingleObject > () from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > 2 Thread 14616.0x3d0c0x00007ffa62e339e4 in > ntdll!ZwWaitForWorkViaWorkerFactory () > from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > 3 Thread 14616.0x12c40x00007ffa62e339e4 in > ntdll!ZwWaitForWorkViaWorkerFactory () > from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > 4 Thread 14616.0x32ac0x00007ffa62e339e4 in > ntdll!ZwWaitForWorkViaWorkerFactory () > from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > * 5 Thread 14616.0x33040x0000000000000000 in ?? () > 6 Thread 14616.0x38a80x00007ffa62e30194 in ntdll!ZwReadFile () from > /cygdrive/c/Windows/SYSTEM32/ntdll.dll > 7 Thread 14616.0x8f0 0x00007ffa62e30c24 in > ntdll!ZwWaitForMultipleObjects () from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > 8 Thread 14616.0x3d540x00007ffa62e30c24 in > ntdll!ZwWaitForMultipleObjects () from /cygdrive/c/Windows/SYSTEM32/ntdll.dll > 9 Thread 14616.0x1ab40x00007ffa62dbec08 in ntdll!LdrShutdownThread () > from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > > (gdb) backtrace full > #0 0x0000000000000000 in ?? () > No symbol table info available. > #1 0x0000000180163eb0 in pthread_setspecific ()at > /usr/src/debug/cygwin-3.1.4-1/winsup/cygwin/thread.cc:2858 > pthread_key::keys = {mx = {lock_counter = 0, win32_obj_id = 0xcc}, head =0x800064fb0} > pthread_rwlock::rwlocks= {mx = {lock_counter = 0, win32_obj_id = 0xc8}, head = 0x8000659a0} > pthread::threads = {mx = {lock_counter = 0, win32_obj_id = 0xbc}, head =0x800000010} > pthread_mutex::mutex_initialization_lock = {lock_counter = 0, win32_obj_id =0x254} > pthread_null::_instance = {<pthread> = {<verifyable_object> = { > _vptr.verifyable_object = 0x1802bdea0 <vtable for > pthread_null+16>, magic= 0}, win32_obj_id = 0x0, > attr = {<verifyable_object> = {_vptr.verifyable_object > =0x1802bde60 <vtable for pthread_attr+16>, magic = 3742232648}, > joinable = 1, contentionscope = 0, inheritsched = 0, > schedparam ={sched_priority = 0}, stackaddr = 0x0, stacksize = 0, > guardsize= 12288, name = 0x0}, function = 0x0, arg = 0x0, > return_ptr = 0x0, valid =false, suspended = false, > canceled = false, cancelstate = 0, canceltype = 0, cygtls = 0x0, > cancel_event =0x0, joiner = 0x0, next = 0x0, > static threads = {mx = {lock_counter = 0, win32_obj_id =0xbc}, > head = 0x800000010}, thread_id = 0, cleanup_stack = 0x0, > mutex = {<verifyable_object> = {_vptr.verifyable_object = > 0x1802bed20<vtable for pthread_mutex+16>, magic = 3742232646}, > next = 0x0, lock_counter = 0, win32_obj_id = 0xd8, owner = > 0x1, static_new_mutex = 0x1, static _unlocked_mutex = 0x2, > static _destroyed_mutex = 0x3, recursion_counter = 0, > condwaits = 0, type = 2,pshared = 0, static mutexes = {mx = { > lock_counter = 0, win32_obj_id = 0xd0}, head = > 0x800065b38}, staticmutex_initialization_lock = {lock_counter = 0, > win32_obj_id = 0x254}}, parent_sigmask = 0}, static > _instance ={<pthread> = {<verifyable_object> = { > _vptr.verifyable_object = 0x1802bdea0 <vtable for > pthread_null+16>, magic= 0}, win32_obj_id = 0x0, > attr = {<verifyable_object> = {_vptr.verifyable_object = > 0x1802bde60<vtable for pthread_attr+16>, magic = 3742232648}, > joinable= 1, contentionscope = 0, inheritsched = 0, > schedparam = {sched_priority = 0},stackaddr = 0x0, > stacksize = 0, guardsize = 12288, name = 0x0}, function = > 0x0, arg = 0x0,return_ptr = 0x0, valid = false, > suspended = false, canceled = false, cancelstate = 0, > canceltype = 0, cygtls =0x0, cancel_event = 0x0, joiner = 0x0, > next = 0x0, static threads = {mx = {lock_counter = 0, > win32_obj_id = 0xbc},head = 0x800000010}, thread_id = 0, > cleanup_stack = 0x0, mutex = {<verifyable_object> = { > _vptr.verifyable_object = 0x1802bed20 <vtable for > pthread_mutex+16>,magic = 3742232646}, next = 0x0, > lock_counter = 0, win32_obj_id = 0xd8, owner = 0x1, static > _new_mutex = 0x1,static _unlocked_mutex = 0x2, > static _destroyed_mutex = 0x3, recursion_counter = 0, > condwaits = 0, type = 2,pshared = 0, static mutexes = {mx = { > lock_counter = 0, win32_obj_id = 0xd0}, head = > 0x800065b38}, staticmutex_initialization_lock = { > lock_counter = 0, win32_obj_id = 0x254}}, parent_sigmask = 0}, > static _instance = <same as static member of an already seen type>}} > pthread_rwlock::rwlock_initialization_lock = {lock_counter = 0, win32_obj_id =0x108} > semaphore::semaphores = {mx = {lock_counter = 0, win32_obj_id = 0xd4}, head =0x0} > pthread_cond::conds = {mx = {lock_counter = 0, win32_obj_id = 0xc4}, head =0x800065ad0} > pthread_cond::cond_initialization_lock = {lock_counter = 0, win32_obj_id =0x104} > --Type <RET> for more, q to quit, c to continuewithout paging-- > pthread_mutex::mutexes = {mx = {lock_counter = 0, win32_obj_id = 0xd0}, head =0x800065b38} > Backtrace stopped: Cannot access memory at address 0x0 > (gdb) -- With best regards, Andrey Repin Monday, May 4, 2020 18:39:42 Sorry for my terrible english... ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: CygWin / Sshd / ssh-keygen hangs 2020-05-04 15:42 ` Andrey Repin @ 2020-05-06 6:10 ` Cezar Damian 2020-05-06 14:50 ` Andrey Repin 0 siblings, 1 reply; 4+ messages in thread From: Cezar Damian @ 2020-05-06 6:10 UTC (permalink / raw) To: cygwin Hi Andrew, I'm not using W10 components, I have only cygwin installed with open-ssh and rsync.Unfortunatelly disable_pcon didn't help, I have the same issue : - ssh-keygen hangs- sshd - hangs with high CPU usage ( 100% split on number of instances )- I don't see any handles or files open by sshd or ssh-keygen- when debuggin with windbg I got cygwin1.dll waiting for a get_perm_acl, but only once BTW, I'm runnig sshd as service, but also in console, via bash, is hanging. Could it be that the fact that W10 is in a VMWare has some impact on cygWin ? Regards, Cezar Damian On Monday, May 4, 2020, 05:50:05 PM GMT+2, Andrey Repin <anrdaemon@yandex.ru> wrote: Greetings, Cezar Damian! > When trying to run ssh-keygen or sshd from Cygwin bash both of them are > hanging. > Wehave the following configuration : > > - CygWin – latest version > - Openssh – latest available version > - OS – W10 running in a VMWare environment > When attaching with gdb to the process, I can see that ssh-keygen threads > are waiting for something ( see below ) and the program is blocked in > pthread_setspecific (). > > Do you have any idea what is causing such a behaviorand how can we: > > - Work around it > - Understand what causes it ? This can be an external (to Cygwin) issue, and I see tha tyou are indeed using Cygwin's ssh-keyegen for all that I can tell, but please double-check that you aren't actually using Win10 peovided OpenSSH components. To the hangs, try running them with CYGWIN=disable_pcon for a test. > Thank you, > Cezar Damian > (gdb) info threads > Id TargetId Frame > 1 Thread 14616.0x2ccc0x00007ffa62e30154 in ntdll!ZwWaitForSingleObject > () from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > 2 Thread 14616.0x3d0c0x00007ffa62e339e4 in > ntdll!ZwWaitForWorkViaWorkerFactory () > from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > 3 Thread 14616.0x12c40x00007ffa62e339e4 in > ntdll!ZwWaitForWorkViaWorkerFactory () > from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > 4 Thread 14616.0x32ac0x00007ffa62e339e4 in > ntdll!ZwWaitForWorkViaWorkerFactory () > from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > * 5 Thread 14616.0x33040x0000000000000000 in ?? () > 6 Thread 14616.0x38a80x00007ffa62e30194 in ntdll!ZwReadFile () from > /cygdrive/c/Windows/SYSTEM32/ntdll.dll > 7 Thread 14616.0x8f0 0x00007ffa62e30c24 in > ntdll!ZwWaitForMultipleObjects () from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > 8 Thread 14616.0x3d540x00007ffa62e30c24 in > ntdll!ZwWaitForMultipleObjects () from /cygdrive/c/Windows/SYSTEM32/ntdll.dll > 9 Thread 14616.0x1ab40x00007ffa62dbec08 in ntdll!LdrShutdownThread () > from/cygdrive/c/Windows/SYSTEM32/ntdll.dll > > (gdb) backtrace full > #0 0x0000000000000000 in ?? () > No symbol table info available. > #1 0x0000000180163eb0 in pthread_setspecific ()at > /usr/src/debug/cygwin-3.1.4-1/winsup/cygwin/thread.cc:2858 > pthread_key::keys = {mx = {lock_counter = 0, win32_obj_id = 0xcc}, head =0x800064fb0} > pthread_rwlock::rwlocks= {mx = {lock_counter = 0, win32_obj_id = 0xc8}, head = 0x8000659a0} > pthread::threads = {mx = {lock_counter = 0, win32_obj_id = 0xbc}, head =0x800000010} > pthread_mutex::mutex_initialization_lock = {lock_counter = 0, win32_obj_id =0x254} > pthread_null::_instance = {<pthread> = {<verifyable_object> = { > _vptr.verifyable_object = 0x1802bdea0 <vtable for > pthread_null+16>, magic= 0}, win32_obj_id = 0x0, > attr = {<verifyable_object> = {_vptr.verifyable_object > =0x1802bde60 <vtable for pthread_attr+16>, magic = 3742232648}, > joinable = 1, contentionscope = 0, inheritsched = 0, > schedparam ={sched_priority = 0}, stackaddr = 0x0, stacksize = 0, > guardsize= 12288, name = 0x0}, function = 0x0, arg = 0x0, > return_ptr = 0x0, valid =false, suspended = false, > canceled = false, cancelstate = 0, canceltype = 0, cygtls = 0x0, > cancel_event =0x0, joiner = 0x0, next = 0x0, > static threads = {mx = {lock_counter = 0, win32_obj_id =0xbc}, > head = 0x800000010}, thread_id = 0, cleanup_stack = 0x0, > mutex = {<verifyable_object> = {_vptr.verifyable_object = > 0x1802bed20<vtable for pthread_mutex+16>, magic = 3742232646}, > next = 0x0, lock_counter = 0, win32_obj_id = 0xd8, owner = > 0x1, static_new_mutex = 0x1, static _unlocked_mutex = 0x2, > static _destroyed_mutex = 0x3, recursion_counter = 0, > condwaits = 0, type = 2,pshared = 0, static mutexes = {mx = { > lock_counter = 0, win32_obj_id = 0xd0}, head = > 0x800065b38}, staticmutex_initialization_lock = {lock_counter = 0, > win32_obj_id = 0x254}}, parent_sigmask = 0}, static > _instance ={<pthread> = {<verifyable_object> = { > _vptr.verifyable_object = 0x1802bdea0 <vtable for > pthread_null+16>, magic= 0}, win32_obj_id = 0x0, > attr = {<verifyable_object> = {_vptr.verifyable_object = > 0x1802bde60<vtable for pthread_attr+16>, magic = 3742232648}, > joinable= 1, contentionscope = 0, inheritsched = 0, > schedparam = {sched_priority = 0},stackaddr = 0x0, > stacksize = 0, guardsize = 12288, name = 0x0}, function = > 0x0, arg = 0x0,return_ptr = 0x0, valid = false, > suspended = false, canceled = false, cancelstate = 0, > canceltype = 0, cygtls =0x0, cancel_event = 0x0, joiner = 0x0, > next = 0x0, static threads = {mx = {lock_counter = 0, > win32_obj_id = 0xbc},head = 0x800000010}, thread_id = 0, > cleanup_stack = 0x0, mutex = {<verifyable_object> = { > _vptr.verifyable_object = 0x1802bed20 <vtable for > pthread_mutex+16>,magic = 3742232646}, next = 0x0, > lock_counter = 0, win32_obj_id = 0xd8, owner = 0x1, static > _new_mutex = 0x1,static _unlocked_mutex = 0x2, > static _destroyed_mutex = 0x3, recursion_counter = 0, > condwaits = 0, type = 2,pshared = 0, static mutexes = {mx = { > lock_counter = 0, win32_obj_id = 0xd0}, head = > 0x800065b38}, staticmutex_initialization_lock = { > lock_counter = 0, win32_obj_id = 0x254}}, parent_sigmask = 0}, > static _instance = <same as static member of an already seen type>}} > pthread_rwlock::rwlock_initialization_lock = {lock_counter = 0, win32_obj_id =0x108} > semaphore::semaphores = {mx = {lock_counter = 0, win32_obj_id = 0xd4}, head =0x0} > pthread_cond::conds = {mx = {lock_counter = 0, win32_obj_id = 0xc4}, head =0x800065ad0} > pthread_cond::cond_initialization_lock = {lock_counter = 0, win32_obj_id =0x104} > --Type <RET> for more, q to quit, c to continuewithout paging-- > pthread_mutex::mutexes = {mx = {lock_counter = 0, win32_obj_id = 0xd0}, head =0x800065b38} > Backtrace stopped: Cannot access memory at address 0x0 > (gdb) -- With best regards, Andrey Repin Monday, May 4, 2020 18:39:42 Sorry for my terrible english... ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: CygWin / Sshd / ssh-keygen hangs 2020-05-06 6:10 ` Cezar Damian @ 2020-05-06 14:50 ` Andrey Repin 0 siblings, 0 replies; 4+ messages in thread From: Andrey Repin @ 2020-05-06 14:50 UTC (permalink / raw) To: Cezar Damian, cygwin Greetings, Cezar Damian! Please don't top-post in this list. >> When trying to run ssh-keygen or sshd from Cygwin bash both of them are >> hanging. >> Wehave the following configuration : >> >> - CygWin – latest version >> - Openssh – latest available version >> - OS – W10 running in a VMWare environment >> When attaching with gdb to the process, I can see that ssh-keygen threads >> are waiting for something ( see below ) and the program is blocked in >> pthread_setspecific (). > Could it be that the fact that W10 is in a VMWare has some impact on cygWin ? It could be. Though, I'm using VirtualBox myself and I haven't experienced such issue. -- With best regards, Andrey Repin Wednesday, May 6, 2020 17:48:56 Sorry for my terrible english... ^ permalink raw reply [flat|nested] 4+ messages in thread
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2020-05-04 9:39 ` CygWin / Sshd / ssh-keygen hangs Cezar Damian
2020-05-04 15:42 ` Andrey Repin
2020-05-06 6:10 ` Cezar Damian
2020-05-06 14:50 ` Andrey Repin
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