Bug Tracker item #2943438, was opened at 2010-02-01 00:48
Message generated for change (Tracker Item Submitted) made by ensc
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Category: daemon
Group: v3.9.0
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Enrico Scholz (ensc)
Assigned to: Nobody/Anonymous (nobody)
Summary: cssclean corrupts hashfile
Initial Comment:
cssclean.c makes
| hash_rec_max = strtol(READ_ATTRIB("HashRecMax"), NULL, 0);
|
| if (_hash_drv_open(filename, &old, 0, max_seek,
| max_extents, extent_size, pctincrease, flags))
| ...
| if (_hash_drv_open(newfile, &new, hash_rec_max, max_seek,
| max_extents, extent_size, pctincrease, flags)) {
| ...
| /* preserve counters */
| memcpy(new.header, old.header, sizeof(*new.header));
This causes errors (e.g. a floating point exception due to division
by zero) or data corruption when the old file has a hash-rec size
(old.header.hash_rec_max) which is different from the configured one.
Such a situation happens e.g. when configuration has been changed or
'csscompress' has been run over the file.
Then, the hash-driver will work with 'hash_rec_max' some time but
when closing the file, the hash_rec_max value of the old file will be
written and subsequent operate on wrong hash divider and calculate
wrong offset of next extent.
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https://sourceforge.net/tracker/?func=detail&atid=1126467&aid=2943438&group_id=250683
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