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Reset the resident attribute offset when appending from none 

When there is no resident attribute value, its offset is unsafe, so better
to recompute it when appending data.
edge.strict_endians^2
Jean-Pierre André 2021-07-19 09:23:23 +02:00
parent 0911ef206d
commit 4462f82580
1 changed files with 7 additions and 0 deletions
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7
libntfs-3g/attrib.c
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@ -4828,6 +4828,13 @@ int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a,
ntfs_log_trace("Entering for new size %u.\n", (unsigned)new_size);
if (!a->value_length) {
/* Offset is unsafe when no value */
int offset = ((offsetof(ATTR_RECORD, resident_end)
+ a->name_length*sizeof(ntfschar) - 1) | 7) + 1;
a->value_offset = cpu_to_le16(offset);
}
/* Resize the resident part of the attribute record. */
if ((ret = ntfs_attr_record_resize(m, a, (le16_to_cpu(a->value_offset) +
new_size + 7) & ~7)) < 0)