Package: samba-vfs-modules
Version: 2:4.11.1+dfsg-3
Severity: important

I use vfs_fruit with a Samba share serving various older versions of Mac OS X, 
from 10.6 up through 10.11, archiving classic Mac files dating back to the mid 
80s. With the latest Samba 4.11.1 in Debian testing, writing one of these older 
files with a resource fork larger than 64K results in the resource fork portion 
getting truncated to 65454 bytes on the server end. This corrupts old Mac files 
with resource forks larger than 64K-- executables are the most affected by 
this, but graphic files such as PICT are too.

Looks like this is a regression, as this issue does not occur in 4.9.5 from 
Debian stable.

Repro steps:
1) Copy a classic 68K Mac OS application > 65K from a Mac OS X 10.11 client to 
a Samba 4.9.5 host. (I used ircle 1.5.6 as a test case here.)
2) Get Info on the newly-copied file on the 4.9.5 server and observe that the 
application's size matches that of the original file on the client.
 - Screenshot here: 
https://blitter.net/etc/rsrc_bug/Screen%20Shot%202019-12-08%20at%2012.13.23%20PM.png
3) Observe the same in Finder.
 - Screenshot here: 
https://blitter.net/etc/rsrc_bug/Screen%20Shot%202019-12-08%20at%2012.12.15%20PM.png
4) Copy the same application from the same Mac OS X 10.11 client to a Samba 
4.11.1 host.
5) Get Info on the newly-copied file on the 4.11.1 server and observe that the 
application's size has been truncated.
 - Screenshot here: 
https://blitter.net/etc/rsrc_bug/Screen%20Shot%202019-12-08%20at%2012.13.26%20PM.png
6) Observe the same in Finder.
 - Screenshot here: 
https://blitter.net/etc/rsrc_bug/Screen%20Shot%202019-12-08%20at%2012.12.35%20PM.png

My smb.conf from testparm (identical on both test hosts above except for the 
name of the share which should reflect the Samba version)-- /srv/test is 0777 
on both host filesystems (ext4):

# Global parameters
[global]
        log file = /var/log/samba/log.%m
        logging = file
        map to guest = Bad User
        max log size = 1000
        obey pam restrictions = Yes
        pam password change = Yes
        panic action = /usr/share/samba/panic-action %d
        passwd chat = *Enter\snew\s*\spassword:* %n\n 
*Retype\snew\s*\spassword:* %n\n *password\supdated\ssuccessfully* .
        passwd program = /usr/bin/passwd %u
        server role = standalone server
        unix password sync = Yes
        usershare allow guests = Yes
        idmap config * : backend = tdb
        vfs objects = catia fruit streams_xattr


[4.11.1]
        guest ok = Yes
        path = /srv/test
        read only = No


-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 5.2.0-3-amd64 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), 
LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages samba-vfs-modules depends on:
ii  libbsd0       0.10.0-1
ii  libc6         2.29-2
ii  libgnutls30   3.6.10-4
ii  libtalloc2    2.3.0-2
ii  libtdb1       1.4.2-2
ii  libtevent0    0.10.1-3
ii  libwbclient0  2:4.11.1+dfsg-3
ii  samba-libs    2:4.11.1+dfsg-3

Versions of packages samba-vfs-modules recommends:
ii  libcephfs2   12.2.11+dfsg1-2.1+b2
ii  libdbus-1-3  1.12.16-2
ii  libgfapi0    7.0-1

samba-vfs-modules suggests no packages.

-- no debconf information

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