[Bug 1966591] [NEW] ssh-keygen -R changes known_hosts file permissions (mode)
Public bug reported: When I use ssh-keygen -R to remove a host from known_hosts it changes permissions on the file. This causes problems particularly when used on the global known hosts file (/etc/ssh/ssh_known_hosts), because then only root can read it. Programs running non-interactively as non-root users suddenly fail to SSH and it's not immediately obvious why. To reproduce: $ ssh-keyscan github.com >test_known_hosts $ chmod 741 test_known_hosts $ ssh-keygen -R github.com -f test_known_hosts $ stat test_known_hosts ... Access: (0600/-rw---) ... Expected behavior: file permissions remain unchanged (mode 0741 in this example). $ lsb_release -rd Description:Ubuntu 18.04.6 LTS Release:18.04 $ apt-cache policy openssh-client openssh-client: Installed: 1:7.6p1-4ubuntu0.6 ** Affects: openssh (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1966591 Title: ssh-keygen -R changes known_hosts file permissions (mode) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssh/+bug/1966591/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1899800] Re: Runtime deadlock: pthread_cond_signal failed to wake up pthread_cond_wait due to a bug in undoing stealing
Thank you, but workstation GC is not a realistic option for us, unfortunately. This is still affecting us. Is there some other workaround? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899800 Title: Runtime deadlock: pthread_cond_signal failed to wake up pthread_cond_wait due to a bug in undoing stealing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1899800/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1899800] Re: Runtime deadlock: pthread_cond_signal failed to wake up pthread_cond_wait due to a bug in undoing stealing
Yes, that would be very nice. I'm not holding out much hope of this being fixed for 18.04, but even if we have to upgrade to 20.04 to get the fix we might prioritise that. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899800 Title: Runtime deadlock: pthread_cond_signal failed to wake up pthread_cond_wait due to a bug in undoing stealing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1899800/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1899800] Re: Runtime deadlock: pthread_cond_signal failed to wake up pthread_cond_wait due to a bug in undoing stealing
Could someone clarify the status of this, please? Our .NET Core application freezes from time to time and I believe it's because of this issue (see https://github.com/dotnet/runtime/issues/47700). The linked glibc bug [https://sourceware.org/bugzilla/show_bug.cgi?id=25847] is now "UNCONFIRMED". So is there a glibc fix that has not made it into Ubuntu or is there not even a glibc fix (that doesn't break something else)? Is this expected to be fixed in 18.04 or 20.04 at all? 21.10? 22.04? ** Bug watch added: github.com/dotnet/runtime/issues #47700 https://github.com/dotnet/runtime/issues/47700 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1899800 Title: Runtime deadlock: pthread_cond_signal failed to wake up pthread_cond_wait due to a bug in undoing stealing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/glibc/+bug/1899800/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1966591] Re: ssh-keygen -R changes known_hosts file permissions (mode)
Thanks a lot! 0644 are really the important bits, so while the behavior is still "user-surprising" it shouldn't cause any practical problems for us. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1966591 Title: ssh-keygen -R changes known_hosts file permissions (mode) To manage notifications about this bug go to: https://bugs.launchpad.net/openssh/+bug/1966591/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1966591] Re: ssh-keygen -R changes known_hosts file permissions (mode)
Tested openssh-client/bionic-proposed,now 1:7.6p1-4ubuntu0.7 and confirmed that group's and others' read permissions are now preserved. Write and execute permissions are still removed, that is, a umask of 0133 seems to be applied. ** Tags removed: verification-needed-bionic ** Tags added: verification-done-bionic -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1966591 Title: ssh-keygen -R changes known_hosts file permissions (mode) To manage notifications about this bug go to: https://bugs.launchpad.net/openssh/+bug/1966591/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
