kernel-packages team mailing list archive

[Alan Modra <amodra.tools@xxxxxxxxx>]

This is a stupid testcase, the failure should be ignored.

The glibc values for MINSIGSTKSZ and SIGSTKSZ must be large enough to
cover all known kernels, so that user programs will run on any kernel
and with any usage of vmx, htm and whatever else changes context size.

The values in the kernel on the other hand are for testing whether a
given binary will run on that kernel.  In the absence of knowledge
regarding whether a binary makes use of htm or vsx, the kernel values
must be the minimum allowed on all known kernels.  Otherwise an old
binary that doesn't make use of vsx or htm will no longer run on a new
kernel.


** Changed in: linux (Ubuntu)
       Status: Confirmed => Invalid

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https://bugs.launchpad.net/bugs/1267062

Title:
  LTP sigaltstack02 test failure -- MINSIGSTKSZ in userspace missmatches
  kernel (was: sigaltstack system call unable to send proper return code
  (error12))

Status in “eglibc” package in Ubuntu:
  New
Status in “linux” package in Ubuntu:
  Invalid

Bug description:
  9.3.189.114 (root/.pasroot) (Host Machine)
  Run the follwoing command to go to the guest victim machine from (/var/lib/libvirt/images/jagan/new_ubuntu_alpha1)

  qemu-system-ppc64 -enable-kvm -M pseries -cpu POWER8 -smp 1 -m 10G
  -nographic -nodefaults -monitor stdio -serial pty -append
  "root=/dev/sda" -kernel trusty-server-cloudimg-ppc64el-vmlinuz-generic
  -device spapr-vscsi -device spapr-
  vlan,netdev=net0,mac=6c:ae:8b:69:16:15 -netdev
  bridge,br=virbr0,id=net0 -drive file=trusty-server-cloudimg-
  ppc64el.img.qcow2

  after this command you will get the screen number.
  example:

  QEMU 1.6.0 monitor - type 'help' for more information
  (qemu) char device redirected to /dev/pts/16 (label serial0)

  Then open another host session and execute the below command

  # screen /dev/pts/16
  (qemu)

  Here the screen number is  /dev/pts/16

  -->>Then you will get a blank screen so press ENTER key.

  The guest machine login: ubuntu/passw0rd

  Then do --->sudo -i

  Environment:
  ===========
  Host: Power8
  Guest : ubuntu hosted on Power8
  The issue:
  ======
  sigaltstack system call unable send proper return value.

  
  How to run :
  ========
  -->cd /root/ltp-full-20130904/testcases/kernel/syscalls/sigaltstack

  --> ./sigaltstack02  ==> Getting the below error

  sigaltstack02    1  TPASS  :  stgaltstack() fails, Invalid Flag value, errno:22
  sigaltstack02    2  TFAIL  :  sigaltstack() returned 0, expected -1, errno:12 =====>> FAIL

  <<<test_start>>>
  tag=sigaltstack02 stime=1386653793
  cmdline="sigaltstack02"
  contacts=""
  analysis=exit
  <<<test_output>>>
  sigaltstack02    1  TPASS  :  stgaltstack() fails, Invalid Flag value, errno:22
  sigaltstack02    2  TFAIL  :  sigaltstack() returned 0, expected -1, errno:12
  <<<execution_status>>>
  initiation_status="ok"
  duration=0 termination_type=exited termination_id=1 corefile=no
  cutime=0 cstime=0
  <<<test_end>>>

  sigaltstack() should fail and set errno to ENOMEM when the size of alternate stack area is less than MINSIGSTKSZ.
  But here its sigaltstack() is returning 0.

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