** Changed in: rsync (Ubuntu)
Status: New => Fix Released
** Description changed:
[ Impact ]
- * Right now, on Noble, the --delete-missing-args command fails on
- missing directories.
+ * Right now, on Noble, the --delete-missing-args command fails on
+ missing directories.
- * The bug occurs becuase --delete-missing-args uses file mode 0 as
- a sentinel value for deleted directories. This is registered as
- an unknown mode to a validation check in recv_file (added by
- a security patch), which causes rsync to abort.
+ * The bug occurs becuase --delete-missing-args uses file mode 0 as
+ a sentinel value for deleted directories. This is registered as
+ an unknown mode to a validation check in recv_file (added by
+ a security patch), which causes rsync to abort.
- * The fix adds an explicit check for this case, allowing mode 0
- if (and only if) --delete-missing-args is active.
+ * The fix adds an explicit check for this case, allowing mode 0
+ if (and only if) --delete-missing-args is active.
[ Test Plan ]
- * Run the attached reproducer script. On the buggy version,
- it exits 2. On the fixed version, it exits 0.
+ * Run the attached reproducer script. On the buggy version,
+ it exits 2. On the fixed version, it exits 0.
[ Where problems could occur ]
- * This patch alters code added in a security patch (specifically,
- security-202605/0048). As such, there is the possibility of
- security concerns.
+ * This patch alters code added in a security patch (specifically,
+ security-202605/0048). As such, there is the possibility of
+ security concerns.
- * It is possible that other previously unseen buggy behavior surrounding
- --delete-missing-args and/or its choice of mode 0 may be exposed as a
- result of this fix.
+ * It is possible that other previously unseen buggy behavior surrounding
+ --delete-missing-args and/or its choice of mode 0 may be exposed as a
+ result of this fix.
- * This fix explicitly checks for the offending --delete-missing-args being
- enabled in conjunction with the sentinel. If mode 0 legitimately appears
- in other contexts, rsync will still fail.
+ * This fix explicitly checks for the offending --delete-missing-args being
+ enabled in conjunction with the sentinel. If mode 0 legitimately appears
+ in other contexts, rsync will still fail.
+
+ [ Other Info ]
+
+ The bug was fixed upstream in 3.4.1, which is present in Questing /
+ Resolute.
[ Original Bug Text ]
Summary: rsync --delete-missing-args aborts with "invalid file mode 00
... protocol incompatibility (code 2)" when a missing --files-from arg
is a directory
Package:
```
apt policy rsync
rsync:
Installed: 3.2.7-1ubuntu1.4
Candidate: 3.2.7-1ubuntu1.4
Version table:
*** 3.2.7-1ubuntu1.4 500
500 http://azure.archive.ubuntu.com/ubuntu noble-updates/main amd64
Packages
500 http://azure.archive.ubuntu.com/ubuntu noble-security/main amd64
Packages
100 /var/lib/dpkg/status
3.2.7-1ubuntu1 500
500 http://azure.archive.ubuntu.com/ubuntu noble/main amd64 Packages
```
Description:
When a directory listed in --files-from no longer exists on the source side,
--delete-missing-args is supposed to delete that directory on the destination.
Instead rsync aborts during file-list processing.
Steps to reproduce:
Run the following script (also attached). Safe: runs entirely inside a fresh
mktemp dir, no sudo, self-cleans.
```
#!/bin/sh
# Minimal reproduction of an rsync --delete-missing-args failure.
#
# When a directory listed in --files-from is missing on the source side,
# --delete-missing-args should delete that directory on the destination.
# Instead rsync aborts with:
#
# invalid file mode 00 for <path> [Receiver]
# rsync error: protocol incompatibility (code 2) at flist.c(NNN)
#
# Safe: runs entirely inside a fresh mktemp dir, no sudo, self-cleans.
rsync --version | head -1
echo
work=$(mktemp -d)
cd "$work" || exit 1
# Source and destination both start out containing dir/sub/file
mkdir -p src/dir/sub dst/dir/sub
echo content > src/dir/sub/file
echo content > dst/dir/sub/file
# Remove the 'sub' directory on the source side (its parent 'dir' remains)
rm -rf src/dir/sub
# Ask rsync to sync just dir/sub. It is missing on the source, so
# --delete-missing-args should delete it on the destination.
printf 'dir/sub\n' > list.txt
rsync -r --delete --delete-missing-args --files-from=list.txt src/ dst/
echo "exit code: $?"
cd / && rm -rf "$work"
```
Expected:
rsync deletes dir/sub on the destination and exits 0.
Actual:
rsync exits 2 with:
invalid file mode 00 for dir/sub [Receiver]
rsync error: protocol incompatibility (code 2) at flist.c(NNN)
Additional info:
Reproduces on rsync 3.2.7 (noble). Does NOT reproduce on rsync 3.4.1 (Ubuntu
25.04/25.10), so it appears already fixed upstream. Requesting an SRU backport
of the fix to 24.04 LTS, since 24.04 is supported until 2029 and
--delete-missing-args is currently unusable for missing directory args.
lsb_release:
```
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 24.04.3 LTS
Release: 24.04
Codename: noble
```
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https://bugs.launchpad.net/bugs/2153557
Title:
rsync --delete-missing-args aborts with "invalid file mode 00 ...
protocol incompatibility (code 2)" when a missing --files-from arg is
a directory
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