https://sourceware.org/bugzilla/show_bug.cgi?id=32102
Bug ID: 32102
Summary: elf_compress doesn't handle multiple Elf_Data chunks
created with elf_newdata correctly
Product: elfutils
Version: unspecified
Status: NEW
Severity: normal
Priority: P2
Component: libelf
Assignee: unassigned at sourceware dot org
Reporter: mark at klomp dot org
CC: elfutils-devel at sourceware dot org
Target Milestone: ---
When adding multiple Elf_Data to and Elf_Scn with elf_newdata then calling
elf_compress on the section causes bad compressed data to be written to disk.
Or when setting the layout explicitly and setting ELF_F_LAYOUT elf_update will
trip over the (compressed) section size vs the combined Elf_Data size.
This seems to be caused by elf_compress creating a new Elf_Data and setting it
as new data for the Elf_Scn, but not updating the data_list(->next) field.
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