[Bug tools/22865] [objdump] Arbitrary memory write in default_syscall_abi of eblopenbackend.c.

mark at klomp dot org sourceware-bugzilla@sourceware.org
Mon Feb 26 23:03:00 GMT 2018


Mark Wielaard <mark at klomp dot org> changed:

           What    |Removed                     |Added
                 CC|                            |mark at klomp dot org

--- Comment #2 from Mark Wielaard <mark at klomp dot org> ---
Could you give a bit more information on how you build and run eu-objdump?

I am unable to replicate your results with the given poc.
It simply works as intended:

$ eu-objdump -d ./b
./b: elf64-elf_x86_64

Disassembly of section .fini:

aaaaaaaa:    48 83 ec 08              sub     $0x8,%rsp
aaaaaaae:    48 83 c4 08              add     $0x8,%rsp
aaaaaab2:    c3                       retq

Also it is somewhat surprising it crashes for you inside default_syscall_abi ()
because that doesn't seem to be called. Which indicates the error is somewhere

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