https://sourceware.org/bugzilla/show_bug.cgi?id=31967
Bug ID: 31967
Summary: datarace in elf_compress[_gnu]
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: ---
elf_compress[_gnu] tries to swap out the section data with a compressed or
decompressed version. They do that by calling __libelf_reset_rawdata without
taking any locks, but it then calls __libelf_set_data_list_rdlock as if it did
take a lock.
There might also be an issue with how the Shdr is updated, which is also done
without taking a lock.
And updating the Elf_Section zdata[_base|size|align] values.
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