Comments (5)
disconnect3d
commented on April 28, 2024
1
To use the ptrace syscall you need to launch the container with --cap-add=SYS_PTRACE. Though keep in mind that it lowers the bar of isolation of a given container.
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yrp604
commented on April 28, 2024
Im going to need more information to repro this, I just ran the current master and push and pop seem to work fine for me?
$ bin/rappel
eax=00000000 ebx=00000000 ecx=00000000 edx=00000000 esi=00000000 edi=00000000
eip=00400001 esp=ff9b4be0 ebp=00000000 [cf:0, zf:0, of:0, sf:0, pf:0, af:0, df:0]
cs=0023 ss=002b ds=002b es=002b fs=0000 gs=0000 efl=00000202
> push 0x41414141
eax=00000000 ebx=00000000 ecx=00000000 edx=00000000 esi=00000000 edi=00000000
eip=00400006 esp=ff9b4bdc ebp=00000000 [cf:0, zf:0, of:0, sf:0, pf:0, af:0, df:0]
cs=0023 ss=002b ds=002b es=002b fs=0000 gs=0000 efl=00000202
> mov ebx, 0x42424242
eax=00000000 ebx=42424242 ecx=00000000 edx=00000000 esi=00000000 edi=00000000
eip=00400006 esp=ff9b4bdc ebp=00000000 [cf:0, zf:0, of:0, sf:0, pf:0, af:0, df:0]
cs=0023 ss=002b ds=002b es=002b fs=0000 gs=0000 efl=00000202
> push ebx
eax=00000000 ebx=42424242 ecx=00000000 edx=00000000 esi=00000000 edi=00000000
eip=00400002 esp=ff9b4bd8 ebp=00000000 [cf:0, zf:0, of:0, sf:0, pf:0, af:0, df:0]
cs=0023 ss=002b ds=002b es=002b fs=0000 gs=0000 efl=00000202
> pop ecx
eax=00000000 ebx=42424242 ecx=42424242 edx=00000000 esi=00000000 edi=00000000
eip=00400002 esp=ff9b4bdc ebp=00000000 [cf:0, zf:0, of:0, sf:0, pf:0, af:0, df:0]
cs=0023 ss=002b ds=002b es=002b fs=0000 gs=0000 efl=00000202
> pop esi
eax=00000000 ebx=42424242 ecx=42424242 edx=00000000 esi=41414141 edi=00000000
eip=00400002 esp=ff9b4be0 ebp=00000000 [cf:0, zf:0, of:0, sf:0, pf:0, af:0, df:0]
cs=0023 ss=002b ds=002b es=002b fs=0000 gs=0000 efl=00000202
>
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commented on April 28, 2024
I am running with the following Dockerfile on MacOS Mojave 10.14.6 (18G4032)
built with command make
cc version:
cc (Debian 8.3.0-6) 8.3.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
make version:
GNU Make 4.2.1
Built for x86_64-pc-linux-gnu
Copyright (C) 1988-2016 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Dockerfile:
FROM mcr.microsoft.com/vscode/devcontainers/base:0-debian-10
ENV DEBIAN_FRONTEND=noninteractive
ARG USER_UID=1000
ARG USER_GID=$USER_UID
# Configure apt and install packages
RUN apt-get update \
&& apt-get -y install --no-install-recommends apt-utils dialog 2>&1 \
#
# Verify git and needed tools are installed
&& apt-get -y install git build-essential iproute2 procps libedit-dev nasm \
#
# [Optional] Update a non-root user to match UID/GID - see https://aka.ms/vscode-remote/containers/non-root-user.
&& if [ "$USER_GID" != "1000" ]; then groupmod node --gid $USER_GID; fi \
&& if [ "$USER_UID" != "1000" ]; then usermod --uid $USER_UID node; fi \
# [Optional] Add add sudo support for non-root user
&& apt-get install -y sudo \
&& echo node ALL=\(root\) NOPASSWD:ALL > /etc/sudoers.d/node \
#
# Clean up
&& apt-get autoremove -y \
&& apt-get clean -y \
&& rm -rf /var/lib/apt/lists/*
# Switch back to dialog for any ad-hoc use of apt-get
ENV DEBIAN_FRONTEND=from rappel.
yrp604
commented on April 28, 2024
Im pretty sure docker filters the ptrace syscall unless you explicitly enable it, does running strace or gdb work inside that docker session?
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yrp604
commented on April 28, 2024
Feel free to re-open if this isn't resolved.
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