However, opening could be failing because the application has reached its file descriptor limit, which is even more prevalent with the C family of file functions. Question information Language: English Edit question Status: Expired For: Ubuntu Customization Kit Edit question Assignee: No assignee Edit question Last query: 2015-04-21 Last reply: 2015-05-07 Related bugs Bug #228235: Synaptic Gtk For example, this Redhat bug "yum traceback with python-2.6.6-29.el6_2.2 and higher + missing /dev/urandom" * https://bugzilla.redhat.com/show_bug.cgi?id=893034 msg206823 - (view) Author: Antoine Pitrou (pitrou) * Date: 2013-12-22 17:50 2.6 and 3.1 don't And there is EVEN more to interpret from: fd = _Py_open_noraise("/dev/urandom", O_RDONLY); if (fd < 0) Py_FatalError("Failed to open /dev/urandom"); It definitely did make it past that point! have a peek at this web-site
It tries to use /dev/urandom, and in a worse case scenario uses gettimeofday() and other predictable data. I'll leave it to Martin and Benjamin whether this should be backported to 2.6 and 3.1. (Georg, this changeset should probably be ported to 3.3.0 too) msg170027 - (view) Author: Georg Files File name Uploaded Description Edit hash-randomization-not-implemented.patch [email protected], 2012-08-31 10:39 hash-randomization-not-implemented.patch hash-randomization-not-implemented.patch [email protected], 2012-09-04 04:53 Revised PyExc_NotImplemented hash randomization patch Messages (19) msg165340 - (view) Author: Ian Wienand (iwienand) Date: 2012-07-12 So yes it is a problem in terminal syntaxerror74December 5th, 2015, 02:14 PMThough I have no solution for the issue, I know where it must be happening: https://github.com/python/cpython/blob/master/Python/random.c More exactly, in
Unmounting /home/frank/tmp/remaster-root/tmp/customization-scripts... def seed(self, a=None): if a is None: try: a = long(_hexlify(_urandom(16)), 16) except NotImplementedError: import time a = long(time.time() * 256) # use fractional seconds --- In 2.6, this is indeed With grateful acknowledgement to all contributors. Mounting /proc Mounting /sys Mounting /dev/pts Mounting /tmp Mounting /home/frank/tmp/remaster-root-home Mounting /home/frank/tmp/remaster-apt-cache Mounting /run Mounting /home/frank/tmp/customization-scripts Copying fstab/mtab...
Filed under: emerge, Free Software, Gentoo, note to Self Powered by Plone & Python. Whatever - this was a public service announcement. To do this, set the environment variable PYTHONHASHSEED=0 . $ sudo mv /dev/urandom /dev/urandom~ $ python3 Fatal Python error: Failed to open /dev/urandom Segmentation fault (core dumped) $ PYTHONHASHSEED=0 python3 Python Site Map Accessibility Contact open all Python Home About News Documentation Download Community Foundation Core Development Issue Tracker Issues Search Random Issue Summaries Issues with patch Easy issues Stats User Login(OpenIDpossible)
So the next step is to ensure that the so called device you're opening is actually a device: int success = 0; int fd = insane_open("/dev/urandom", O_RDONLY); if (fd != -1) Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete. I'll leave that question to the cryptographic experts. Of course since the algorithm is known, the entropy seeding it must be a secret, otherwise it is completely predictable.
You can't just trust a file because of it's path. msg170005 - (view) Author: The Written Word ([email protected]) Date: 2012-09-07 19:06 We do not have KRNG11i installed. For backwards compatibility (previous releases all raised and caught NotImplementedError), here is a patch that stops Python bailing out with "OSError: No such file or directory /dev/urandom" for me. arc4random and /dev/(u)random So, how does one port the arc4random family to Linux?
Creating user directory... Unmounting /home/frank/tmp/remaster-root/var/cache/apt... Therefore, we need a good way to use many unpredictable values. First, it's possible the open was interrupted, as may happen on some implementations.
However, most seem to be understanding this as some kind of argument about /dev/random versus /dev/urandom. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. The only reason not to is because one may trust the arc4random set of algorithms more than /dev/urandom. Source xauth: file /root/.Xauthority does not exist xauth: file /home/frank/.Xauthority does not exist Deactivating initctl...
This patch does not stop dev_urandom_noraise() from halting the interpreter on machines with no /dev/urandom, but that seems intentional to me so I didn't try to fix it. msg169815 - (view) Author: The Written Word ([email protected]) Date: 2012-09-04 04:53 Hi Antoine, Thanks for the heads up. Removing generated machine uuid...
Some random device implementations specifically document that read() can be interrupted upon them. Go ahead, try to delete the file as the superuser, nothing stops you. You can run lstat() on /dev/urandom initially, but that has TOCTOU issues. Unmounting SquashFS image...
I'm puzzled by https://h20392.www2.hp.com/portal/swdepot/displayProductInfo.do?productNumber=KRNG11I which claims that HPUX 11.11 (at least) *does* have /dev/urandom. This will be useful during rescue process of a system. mount: warning: /home/frank/tmp/remaster-root-mount seems to be mounted read-only. http://jscience.net/failed-to/failed-to-open-eth0.html Also, you have to consider that applications may be running inside a chroot, and /dev/ entries don't exist.
Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Since the latter is a CSPRNG, it can keep outputting data indefinitely, without any significant waiting periods.
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