Starting w/ the intro of S4U, seteuid32() calls lsaprivkeyauth(), then
s4uauth(). s4uauth calls LsaRegisterLogonProcess().
LsaRegisterLogonProcess fails w/ STATUS_PORT_CONNECTION_REFUSED, if the
proper privileges are not held.
Because of RtlNtStatusToDosError(), this status would be mapped to
ERROR_ACCESS_DENIED, which in turn would map to EACCES. Therefore it is
useless to add this status to errmap[] (errno.cc), as s4auauth() should
return EPERM as errno here (i.e. if process is not privileged).
Hence the kludge.
Before the intro of S4U, seteuid32() called lsaprivkeyauth(), then
lsaauth(), then create_token(). Before the intro of Vista, the latter
would have called NtCreateToken().
NtCreateToken() would have failed w/ STATUS_PRIVILEGE_NOT_HELD for a
process w/o the proper privileges. In that case, calling seteuid32()
would have returned EPERM (as required).
Since the intro of Vista, and if the process had been started from an
UNelevated shell, create_token() does NOT reach NtCreateToken()!
As create_token() failed to properly set errno in that case, calling
seteuid32() would return errno as set by lsaauth(), i.e. EACCES, not
in agreement w/ Posix (a bug which was present for years).
(lsaauth() called LsaRegisterLogonProcess() which would fail)
Switching to Cywin-only PIDs introduced a new problem when collecting
Cygwin processes for `ps -W': A process can show up multiple times
again, if the Cygwin procinfo has been opened for a just execing
process. The execed process then shows up twice, once as Cygwin
process, but with the wrong Windows PID of the execing process,
once as Windows-only process.
The mechanism used to exclude these stray processes didn't work with
the new Cygwin pid handling anymore. To fix this
* check if the incoming Windows PID is the same as the PID in the
procinfo. If not, we have the PID of the execing process while
procinfo was already changed,
* always check if the process has already been handled, not only
for processes we got a procinfo for,
* simplify adding pid to pidlist since pid is now always correct.
While at it, fix comments and comment formatting.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
strace only printed the Windows PID in event output so far.
Especially now that Windows and Cygwin PID are decoupled, the
strace user might like to see the Cygwin pid in event output as
well. However, at process startup, the process might not have
a Cygwin PID yet.
To mitigate this, always print the Windows PID and only add the
Cygwin pid if it exists.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
commit c0d7d3e1a2 removed the usage of the
LCMAP_BYTEREV flag in the call to LCMapStringW to workaround a strange
bug in LCMapStringW. This patch didn't take a userspace call of
wcsxfrm{_l} with NULL buffer and 0 size to evaluate the required buffer
size into account. This introduced a crash trying to byte swap the
NULL buffer. This patch fixes that problem.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
3.0.0 changed uname but missed to align /proc/version
which then used the old uname function on the new uname
struct.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
When logging in via ssh with an unprivileged account,
PdhAddEnglishCounter returns with status 0x800007D0,
PDH_CSTATUS_NO_MACHINE. We didn't find any workaround
but the changes to improve debugging output may help
in future. Using UNICODE instead of ANSI functions is
a result of trying to fix this problem.
Also drop the prototype workaround for PdhAddEnglishCounterA.
It's not required anymore since Mingw-w64's pdh.h catched up.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Create process with standard rights, plus
PROCESS_QUERY_LIMITED_INFORMATION for authenticated users. This
allows to fetch basic process information and thus /proc/<PID>/stat
to succeed on foreign processes.
While at it, fix formatting in CreateProcess calls.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
There's no good reason to return blank if some of the info
couldn't be collected. Drop useless call collecting
SystemProcessorPerformanceInformation. Always return some
valid start_time, even if we couldn't collect ProcessTimes.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The OpenProcess call to generate /proc/<PID>/stat info requests
PROCESS_VM_READ, but that's not required. Drop it.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Creating /proc/<PID>/cmdline requires permissions to communicate
with the target process via its signal pipe. If that fails, the
output is "<defunct>" which doesn't make sense most of the time.
Rather, call format_process_exename in this case to get more useful
process name info, albeit not the full cmdline.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The winpid symlinks got created with no query permissions, so
only admins could see all Cygwin processes. Create symlinks
so everyone has query permissions instead.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Canceling the timer thread runs under lock. The thread uses the same
lock to guard its timer_tracker struct access. If the timing is bad,
timer_settime or timer_delete grab the lock at the same time, the timer
expires. In the end, cancel waits for the thread sync while the thread
waits for ther lock to be released.
Fix this by not waiting for the thread sync under lock.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
On setting the timer, the thread is accidentally only canceled when
disarming the timer. This leaks one thread per timer_settimer call.
Move the thread cancellation where it belongs.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
We don't support setting groups via /etc/groups anymore. Also, the
initgroups group list is created via S4U, so we have "Interactive" vs.
"Network" token, an artificial and entirely irrelevant difference.
So, "verifying" the lsaprivkeyauth token may lead to rejecting a prefectly
valid token. Just remove the verify_token call.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Revert "Cywin: user profile: unload impersonation user profile on exit"
Revert "Cygwin: seteuid: allow inheriting impersonation user profile handle"
Revert "Cygwin: user profile: add debug output to unload_user_profile"
Revert "Cygwin: user profile: Make an effort to unload unused user profiles"
This reverts commit bcb33dc4f0.
This reverts commit dd3730ed9c.
This reverts commit 8eee25241e.
This reverts commit 71b8777a71.
This patchset actually results in the following problem:
- After a couple of ssh logon/logoff attempts, an interactive session
of the same user loging in, is broken.
Apparently UnloadUserProfile manages to unload the user's profile
even while a parallel interactive session still uses the user's
profile.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Per MSDN VirtualQueryEx requires PROCESS_QUERY_INFORMATION.
Testing showed that PROCESS_QUERY_LIMITED_INFORMATION is sufficient
since Windows 8.1. The assumption that Windows 8 is the same as
Windows 8 was not correct, it requires PROCESS_QUERY_INFORMATION
as well.
Fix that by splitting the Windows 8 wincaps into one for Windows 8
and one for Windows 8.1. Set needs_query_information for Windows 8.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
If the user domain is the primary domain, LDAP is supposed to
use the default naming context. This is accomplished by setting
domain name to NULL in the call to cyg_ldap::fetch_ad_account.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
cyg_ldap::fetch_ad_account creates a naming context from the
incoming domain, if it's not NULL. The algorithm overwrites
dots with \0 in domain while creating the naming context, but
neglects to restore the dots.
Fix that by never overwriting the incoming domain name.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
- feenableexcept,fedisableexcept, fegetexcept are GNU-only
- fegetprec, fesetprec are Solaris, use __MISC_VISIBLE
- _feinitialise is Cygwin-internal only
- Replace self-named FP precision values to values from
http://www.open-std.org/jtc1/sc22//WG14/www/docs/n752.htm
as used by Solaris.
- Change return value of fesetprec to adhere to the above document
and Solaris.
- Document fegetprec, fesetprec as Solaris functions, not as GNU
functions
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
...before calling any of its method. It's no safe bet that
it's already initialized when calling s4uauth and adding it
to load_user_profile certainly doesn't hurt.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
In case of a local machine account login, pi.lpProfilePath points
to the buffer returned by NetUserGetInfo, but NetApiBufferFree
is called prior to calling LoadUserProfileW. Fix by copying over
usri3_profile to the local userpath buffer, just as in the AD case.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This never really worked. While at it, restructure code to
do common stuff only in one spot. Improve debug output.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Inspecting the content of case-sensitive directories
on remote machines results in lots of errors like
disappearing diretories and files, file not found, etc.
This is not feasible as default behaviour
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
A sleep is required on Windows 10 64 bit only before calling
RegisterClassW in the timerfd thread, and only when running
under strace. One of the child processes inheriting the timerfd
descriptor will get a STATUS_FLOAT_INEXACT_RESULT exception inside
of msvcrt.dll. It's apparently some timing problem. It occurs
in 4 out of 5 runs under strace only. WOW64 and Windows 7 64 bit
don't have this problem.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The share section was created using the PAGE_SIZE constant,
but PAGE_SIZE is 64K. Fix that by using wincap.page_size()
instead, which returns the desired actual page size of 4K.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
timerfd_tracker and timerfd_shared classes:
- Just because handles are shared, we don't have to store them in
shared memory. Move share handles into timerfd_tracker class.
- Drop shared instance counter since it's not required anymore.
timerfd_shared only stores the actual timer data.
- Drop timerfd_shared::create, just set clock id.
- Drop timerfd_shared::dtor, it's not required anymore.
- Drop timerfd_tracker::close, just call dtor where required.
- Rename timerfd_tracker::increment_instances to timerfd_tracker::dup.
It's the only reason it exists...
- timerfd_tracker::dtor now checks the non-shared pointers for NULL
before attempting to close them.
- timerfd_tracker::dtor handles decrementing the local instance count
by itself.
- Add a method timerfd_tracker::init_fixup_after_fork_exec to set
non-shared pointers to NULL. Together with the dtor patches it
fixes a problem with close_on_exec timerfd descriptors.
- Fix a bug in handling the thread synchronization event. It's
actually nice to create it before using it...
- Drop using sec_none{_nih} in InitializeObjectAttributes. It's
an unnecessary roundabout route just to get a NULL pointer.
- Slightly rework timechange window handling.
- Add more comments to explain what happens.
fhandler_timerfd:
- Drop cnew macro, it just hides what happens.
- fhandler_timerfd::fixup_after_exec now calls
timerfd_tracker::init_fixup_after_fork_exec first, so a subsequent
call to timerfd_tracker::dtor only works on valid handles.
- fhandler_timerfd::close directly calls timerfd_tracker::dtor now.
- Drop dtor call in fhandler_timerfd destructor.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
timerfd_tracker::fixup_after_fork_exec always tries to restore
the shared timer region at the same address as in the parent.
This is entirely unnecessary and wasn't intended, rather some
kind of copy/paste thinko. Fix that. Print NtMapViewOfSection
status code in api_fatal on failure for debugging.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The "optimized" condition to recognize an unarmed timer was plain
wrong. Replace it by checking the stored it_value against 0.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
The child process needs access to the handle to be able to
unload it when switching user context.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Corinna Vinschen
J.H. van de Water