Public bug reported:
SRU Justification
Impact: Christian Kellner reported that creating temporary files via
O_TMPFILE shiftfs reports ESTALE. This can be reproduced via:
import tempfile
import os
def test():
with tempfile.TemporaryFile() as fd:
fd.write("data".encode('utf-8'))
# re-open the file to get a read-only file descriptor
return open(f"/proc/self/fd/{fd.fileno()}", "r")
def main():
fd = test()
fd.close()
if __name__ == "__main__":
main()
a similar issue was reported here:
https://github.com/systemd/systemd/issues/14861
Regression Potential: Limited to shiftfs.
Test Case: Build a kernel with fix applied and run above reproducer.
** Affects: linux (Ubuntu)
Importance: Undecided
Assignee: Christian Brauner (cbrauner)
Status: In Progress
** Changed in: linux (Ubuntu)
Assignee: (unassigned) => Christian Brauner (cbrauner)
** Changed in: linux (Ubuntu)
Status: New => Confirmed
** Changed in: linux (Ubuntu)
Status: Confirmed => In Progress
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https://bugs.launchpad.net/bugs/1872757
Title:
shiftfs: O_TMPFILE reports ESTALE
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