Fix a bug that may cut the ipp->attrs link list #138
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michaelrsweet
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Jan 17, 2026
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I think we can keep the optimization by making it a little smarter by checking whether ipp->prev->next == ipp->current. But good catch!
This reverts commit 8c10923.
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Keeping this open to track the eventual fix (here and in CUPS 2.x). |
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[master adb1863] Fix possible corruption of previous pointer in ipp_t linked list (Issue #138) and the related changes in the CUPS project: [master 6c7d9bbab] Fix possible corruption of previous pointer in ipp_t linked list (Issue #138) [2.4.x dc4407f51] Fix possible corruption of previous pointer in ipp_t linked list. |
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If the ipp_set_value() function has previously called the ippFindAttribute() function, since ippFindAttribute modifies the ipp->prev pointer, causing prev to point to another attr, it results in the truncation of the ipp->attrs linked list.
Modify the
ipp_set_valuefunction to the following idempotent code to reproduce this bug: