https://sourceware.org/bugzilla/show_bug.cgi?id=28685
--- Comment #3 from Mark Wielaard <mark at klomp dot org> --- (In reply to Evgeny Vereshchagin from comment #2) > If callers are > expected to pass correctly aligned buffers it seems > dwfl_segment_report_module should be fixed. But it seems that callers can > sometimes assume that it should be fine to pass unaligned data. For example, > (even though it has nothing to do with the xlateto functions) in one of > libbpf issues it was pointed out that "I don't see anywhere the requirement > that bytes passed to the elf_memory() should be aligned, so this does seem > like libelf bug." I am not sure I like people explicitly passing in unaligned buffers to elf_memory (). We'll need to carefully audit that works. It also means lots of copying data structures around to get a correctly aligned version. Also the xlate functions work on Elf_Data, I think it is reasonable to assume those normally come from other libelf functions and that the d_buf pointers are correctly aligned for the d_type. For now I just fixed up the code in dwfl_segment_report_module to make sure the buffers passed to the xlate functions are properly aligned. See the following proposed patches: https://sourceware.org/pipermail/elfutils-devel/2021q4/004552.html https://sourceware.org/pipermail/elfutils-devel/2021q4/004561.html https://sourceware.org/pipermail/elfutils-devel/2021q4/004562.html -- You are receiving this mail because: You are on the CC list for the bug.
