Opened 16 years ago

Closed 16 years ago

Last modified 12 years ago

#8479 closed (duplicate)

Race condition in core.files.storage.py, leads to crash

Reported by: aubonbeurre Owned by: nobody
Component: File uploads/storage Version: dev
Severity: Keywords:
Cc: Triage Stage: Unreviewed
Has patch: yes Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: no UI/UX: no

Description

This seems related to #4948, but not quite, so I opened a new ticket.

Line 148:

# This file has a file path that we can move.
if hasattr(content, 'temporary_file_path'):

file_move_safe(content.temporary_file_path(), full_path)
content.close()

This should be inverted:

# This file has a file path that we can move.
if hasattr(content, 'temporary_file_path'):

content.close()
file_move_safe(content.temporary_file_path(), full_path)

The code throws an exception, because it ends-up to copy-then-delete, since in my particular case src and dest are not on the same file system.

It will fail on Windows, and I suspect this is particular to NTFS (although I did not test on other platforms): it is not possible to remove an opened file.

Change History (5)

comment:1 by aubonbeurre, 16 years ago

better formatting...

                # This file has a file path that we can move.
                if hasattr(content, 'temporary_file_path'):
                    file_move_safe(content.temporary_file_path(), full_path)
                    content.close()

Should change to:

                # This file has a file path that we can move.
                if hasattr(content, 'temporary_file_path'):
                    content.close()
                    file_move_safe(content.temporary_file_path(), full_path)

comment:2 by aubonbeurre, 16 years ago

And I forgot to mention that the effect is that, because os.unlink(src) fails deep in the code, it will keep appending '_' till the name is too long. Then it will fail for good.

comment:3 by James Bennett, 16 years ago

Component: Core frameworkFile uploads/storage

comment:4 by aubonbeurre, 16 years ago

Resolution: duplicate
Status: newclosed

Duplicate of #8203. Verified fixed by [8493]. Should close the bug. Thanks!!!

comment:5 by Jacob, 12 years ago

milestone: 1.0

Milestone 1.0 deleted

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