Public bug reported:

[SRU Justfication]

BugLink: https://bugs.launchpad.net/bugs/X


[Impact]

Prior to the fix patches, the shm-sysv stressor fails intermittently on
all hardware configurations I tested.

[Fix]

Apply the following patches from upstream:

https://github.com/Mu-L/stress-ng/commit/fd5b8573061ba744208719a4978de61dbe10b98a
https://github.com/Mu-L/stress-ng/commit/a188465406c6cc029957d87f82e07d8e8ad5c502


[Test Case]

stress-ng --aggressive --verify --oom-avoid-bytes 10% --timeout 300
--shm-sysv 0

Expected behavior: Test passes consistently on working hardware
Actual behavior: Test fails intermittently with

stress-ng: fail:  [850391] shm-sysv: shmat on NULL address failed on id
1536196937, (key=49670, size=36864), errno=22 (Invalid argument)

[Where problems could occur]

Regression risk should be minimal since these patches impact only a test
that has undefined / inconsistent behavior without them already

** Affects: stress-ng (Ubuntu)
     Importance: Undecided
     Assignee: Mitchell Augustin (mitchellaugustin)
         Status: New

** Changed in: stress-ng (Ubuntu)
     Assignee: (unassigned) => Mitchell Augustin (mitchellaugustin)

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https://bugs.launchpad.net/bugs/2120203

Title:
  [SRU J/N/P/Q] stress-ng shm-sysv memory stressor fixes

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