https://sourceware.org/bugzilla/show_bug.cgi?id=31225
Mark Wielaard <mark at klomp dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|ASSIGNED |RESOLVED
--- Comment #5 from Mark Wielaard <mark at klomp dot org> ---
commit cc44ac6740797a23cd0af0cb22bd828d569224b8
Author: Mark Wielaard <[email protected]>
Date: Thu Feb 1 14:56:18 2024 +0100
libelf: Treat elf_memory as if using ELF_C_READ_MMAP
An Elf handle created through elf_memory was treated as if opened with
ELF_C_READ. Which means libelf believed it had read the memory itself
and could simply write to it if it wanted (because it wasn't mmaped
directly on top of a file). This causes issues when that memory was
actually read-only. Work around this by pretending the memory was
actually read with ELF_C_READ_MMAP (so directly readable, but not
writable).
Add extra tests to elfgetzdata to check using elf_memory with
read-only memory works as expected.
* libelf/elf_memory.c (elf_memory): Call
__libelf_read_mmaped_file with ELF_C_READ_MMAP.
* tests/elfgetzdata.c (main): Add new "mem" option.
* tests/run-elfgetzdata.sh: Also run all tests with new
"mem" option.
https://sourceware.org/bugzilla/show_bug.cgi?id=31225
Reported-by: Derek Bruening <[email protected]>
Signed-off-by: Mark Wielaard <[email protected]>
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