[Qemu-devel] [Bug 1689367] Re: In qemu chroot, repeating "qemu: Unsupported syscall: 384" messages. sys_getrandom ?

[Philippe Coval]

I am able to reproduce using docker and qemu-arm version 1.5.93

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1689367

Title:
  In qemu chroot, repeating "qemu: Unsupported syscall: 384" messages.
  sys_getrandom ?

Status in QEMU:
  Expired

Bug description:
  On exec of an armv7 qemu chroot on my local x86_64 desktop, launched
  via

          /usr/sbin/qemu-binfmt-conf.sh

  from

          qemu-linux-user-2.9.0-374.1.x86_64

  on the host, inside the chroot any compile activity is laced with
  repetitions of

          qemu: Unsupported syscall: 384

  messages.

  This wasn't always the case -- but, TBH, it's been ~ 6 months since I
  used this env, and there have been scads of usual pkg updates in the
  interim.  These messages appear to be non-fatal, with no particular
  effect at all; at least not so far ...

  From a chat in #IRC,

        [10:05] davidgiluk clever/pgnd: I see it as getrandom
        [10:05] davidgiluk pgnd: 
https://fedora.juszkiewicz.com.pl/syscalls.html   sort it on the ARM table and 
you can easily see it
        [10:05] clever arch/arm/tools/syscall.tbl:384  common  getrandom        
       sys_getrandom
        [10:06] davidgiluk pgnd: my *guess* is that something is calling 
getrandom, getting told it's not implemented and then falling back to using 
/dev/urandom
        [10:10] pgnd davidgiluk: If that *is* the case, is it to be considered 
a problem, or just informational?
        [10:12] davidgiluk pgnd: As long as it's falling back probably 
informational; but someone should probably go and wire up sys_getrandom at some 
point

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1689367/+subscriptions