Corinna Vinschen <corinna-cygwin <at> cygwin.com> writes: > > I couldn't start cygserver as a service with (just) the built DLL in place. > > No idea why. The patch just adds debug output to strace ouptput, nothing > else.
Whatever. I've installed all the binaries from that build and things work normally now. > > So I started it in debug mode from the command line (which makes it have > > less rights than it needs) and started the sshd in debug mode also. > > In a cyg_server GUI session? If so, you should have all rights required > when starting this in an elevated shell. Not the token privileges, I don't think so. But I'm not sure how to check. Here's the salient parts from the strace (attaching to the sshd running as a service in sandbox mode, running with no privilege separation produces a slightly different trace, but the events leading up to the error are the same): 262 1161585 [main] sshd 2044 getpid: 2044 = getpid() 10593 1172178 [main] sshd 2044 get_logon_server: DC: server: \\SC301 58 1172236 [main] sshd 2044 get_user_groups: Before NetUserGetGroups --- Process 560, exception 00000005 at 75511D4D 6543 1178779 [main] sshd 2044 get_user_groups: After NetUserGetGroups ret = 5 56 1178835 [main] sshd 2044 seterrno_from_win_error: ../../../../source/cygwin-snapshot-20140903-1/winsup/cygwin/sec_auth.cc:265 windows error 5 36 1178871 [main] sshd 2044 geterrno_from_win_error: windows error 5 == errno 13 33 1178904 [main] sshd 2044 get_user_local_groups: Before NetUserGetLocalGroups --- Process 560, exception 00000005 at 75511D4D 7964 1186868 [main] sshd 2044 get_user_local_groups: After NetUserGetLocalGroups ret = 5 50 1186918 [main] sshd 2044 seterrno_from_win_error: ../../../../source/cygwin-snapshot-20140903-1/winsup/cygwin/sec_auth.cc:318 windows error 5 38 1186956 [main] sshd 2044 geterrno_from_win_error: windows error 5 == errno 13 37 1186993 [main] sshd 2044 initgroups32: 0 = initgroups(gratz, 1049089) It then proceeds to log on via the token and mounts the entries from my personal fstab (that should fail if it was running as a different user for some of the entries). After checking for /etc/nologin this happens: 35 5023308 [main] sshd 2248 setegid32: new egid: 1049089 current: 197121 41 5023349 [main] sshd 2248 setegid32: NtSetInformationToken (hProcToken, TokenPrimaryGroup), 0xC000005B 3105 5026454 [main] sshd 2248 get_logon_server: DC: server: \\SC301 44 5026498 [main] sshd 2248 get_user_groups: Before NetUserGetGroups --- Process 2248, exception 00000005 at 75511D4D The process apparently gets killed while in the NetUserGetGroups call (much as you suspected). I'm not sure this tells us anything new, though. :-( Regards, Achim. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
