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@jborean93
Created Oct 20, 2021
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Debugging Samba with Symbols
docker run \
-it \
--rm \
--publish 445:445 \
--cap-add=SYS_PTRACE \
--security-opt seccomp=unconfined \
archlinux:latest \
/bin/bash
### INSIDE THE CONTAINER ###
pacman -Syu \
--noconfirm \
bison \
flex \
gcc \
gdb \
make \
perl \
perl-parse-yapp \
pkg-config \
python3 \
rpcsvc-proto \
vim \
wget \
zlib
export PATH=/usr/bin/vendor_perl:$PATH
wget https://download.samba.org/pub/samba/stable/samba-4.15.0.tar.gz
tar -zxf samba-4.15.0.tar.gz
cd samba-4.15.0
./configure \
--enable-debug \
--without-ad-dc \
--without-json
make -j 16
make install
export PATH=/usr/local/samba/bin/:/usr/local/samba/sbin/:$PATH
cat > /usr/local/samba/etc/smb.conf << EOL
[global]
host msdfs = yes
workgroup = WORKGROUP
valid users = @smbgroup
server signing = mandatory
ea support = yes
store dos attributes = yes
vfs objects = xattr_tdb streams_xattr
log level = 10
panic action = /bin/sleep 9999999
[dfs]
comment = Test Samba DFS Root
path = /srv/samba/dfsroot
browsable = yes
guest ok = no
read only = no
create mask = 0755
msdfs root = yes
[share]
comment = Test Samba Share
path = /srv/samba/share
browsable = yes
guest ok = no
read only = no
create mask = 0755
[share-encrypted]
comment = Test Encrypted Samba Share
path = /srv/samba/share-encrypted
browsable = yes
guest ok = no
read only = no
create mask = 0755
smb encrypt = required
EOL
groupadd smbgroup
useradd smbuser -G smbgroup
(echo smbpass; echo smbpass) | smbpasswd -s -a smbuser
mkdir -p /srv/samba/dfsroot
chmod -R 0755 /srv/samba/dfsroot
chown -R smbuser:smbgroup /srv/samba/dfsroot
ln -s msdfs:localhost\\share /srv/samba/dfsroot/share
ln -s msdfs:localhost\\missing,localhost\\share-encrypted /srv/samba/dfsroot/share-encrypted
ln -s msdfs:localhost\\missing /srv/samba/dfsroot/broken
mkdir -p /srv/samba/share
chmod -R 0755 /srv/samba/share
chown -R smbuser:smbgroup /srv/samba/share
mkdir -p /srv/samba/share-encrypted
chmod -R 0755 /srv/samba/share-encrypted
chown -R smbuser:smbgroup /srv/samba/share-encrypted
smbd --debug-stdout --foreground --no-process-group > /tmp/samba.log
### CODE TO RUN ON WINDOWS ###
$file = "\\server\share\file.txt"
Set-Content -Path $file -Value data
Set-Content -Path $file -Stream ALT -Value data
Get-Item $file -Stream *
Remove-Item -Path $file -Force
### ONCE HUNG ###
docker exec -it CONTAINER_ID /bin/bash
ps -aef --forest
gdb -p PID_OF_SLEEP_PARENT
bt
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