Any updates on this ? do we need fix this problem ?

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https://bugs.launchpad.net/bugs/2041670

Title:
   tmpfs: O_DIRECT | O_CREATE open reports open failure but actually
  creates a file.

Status in Linux:
  Unknown
Status in linux package in Ubuntu:
  New

Bug description:
  creating a file on tmpfs with open(filename, O_RDWR | O_DIRECT |
  O_CREAT, 0666) reports an open failure error EINVAL, but still creates
  the file. The file should not be created if we hit such an error.

  Tested and fails on:
  mantic amd64: 6.5.0-10-generic
  lunar amd64: 6.2.0-35-generic
  jammie amd64: 5.15.0-generic
  focal: 5.4.0-165-generic
  bionic: 4.15.0-213-generic
  trusty: 4.4.0-148-generic

  
  sudo mkdir /mnt/tmpfs
  sudo mount -t tmpfs -o size=1G,nr_inodes=10k,mode=777 tmpfs /mnt/tmpfs
  sudo chmod 666 /mnt/tmpfs
  gcc reproducer.c -o reproducer
  sudo ./reproducer

  Run the attached program. It reports an open failure (errno 22,
  EINVAL) but still manages to create the file.

  Note this was original discovered by running stress-ng on tmpfs with
  the open stressor: stress-ng --open 1

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