Security update for squashfs

This update for squashfs fixes the following issues:

• CVE-2015-4645,CVE-2015-4646: Multiple buffer overflows fixed in squashfs-tools (bsc#935380)
• CVE-2021-40153: Fixed an issue where an attacker might have been able to write a file outside of destination (bsc#1189936)
• CVE-2021-41072: Fixed an issue where an attacker might have been
  able to write a file outside the destination directory via a
  symlink (bsc#1190531).

update to 4.6.1:

• Race condition which can cause corruption of the ‘fragment
  table’ fixed. This is a regression introduced in August 2022,
  and it has been seen when tailend packing is used (-tailends option).
• Fix build failure when the tools are being built without
  extended attribute (XATTRs) support.
• Fix XATTR error message when an unrecognised prefix is
  found
• Fix incorrect free of pointer when an unrecognised XATTR
  prefix is found.
• Major improvements in extended attribute handling,
  pseudo file handling, and miscellaneous new options and
  improvements
• Extended attribute handling improved in Mksquashfs and
  Sqfstar
• New Pseudo file xattr definition to add extended
  attributes to files.
• New xattrs-add Action to add extended attributes to files
• Extended attribute handling improved in Unsquashfs
• Other major improvements
• Unsquashfs can now output Pseudo files to standard out.
• Mksquashfs can now input Pseudo files from standard in.
• Squashfs filesystems can now be converted (different
  block size compression etc) without unpacking to an
  intermediate filesystem or mounting, by piping the output of
  Unsquashfs to Mksquashfs.
• Pseudo files are now supported by Sqfstar.
• ‘Non-anchored’ excludes are now supported by Unsquashfs.

update to 4.5.1 (bsc#1190531, CVE-2021-41072):

• This release adds Manpages for Mksquashfs(1), Unsquashfs(1),
  Sqfstar(1) and Sqfscat(1).
• The -help text output from the utilities has been improved
  and extended as well (but the Manpages are now more
  comprehensive).
• CVE-2021-41072 which is a writing outside of destination
  exploit, has been fixed.
• The number of hard-links in the filesystem is now also
  displayed by Mksquashfs in the output summary.
• The number of hard-links written by Unsquashfs is now
  also displayed in the output summary.
• Unsquashfs will now write to a pre-existing destination
  directory, rather than aborting.
• Unsquashfs now allows ‘.’ to used as the destination, to
  extract to the current directory.
• The Unsquashfs progress bar now tracks empty files and
  hardlinks, in addition to data blocks.
• -no-hardlinks option has been implemented for Sqfstar.
• More sanity checking for ‘corrupted’ filesystems, including
  checks for multiply linked directories and directory loops.
• Options that may cause filesystems to be unmountable have
  been moved into a new ‘experts’ category in the Mksquashfs
  help text (and Manpage).
• Maximum cpiostyle filename limited to PATH_MAX. This
  prevents attempts to overflow the stack, or cause system
  calls to fail with a too long pathname.
• Don’t always use ‘max open file limit’ when calculating
  length of queues, as a very large file limit can cause
  Unsquashfs to abort. Instead use the smaller of max open
  file limit and cache size.
• Fix Mksquashfs silently ignoring Pseudo file definitions
  when appending.
• Don’t abort if no XATTR support has been built in, and
  there’s XATTRs in the filesystem. This is a regression
  introduced in 2019 in Version 4.4.
• Fix duplicate check when the last file block is sparse.

update to 4.5:

• Mksquashfs now supports ‘Actions’.
• New sqfstar command which will create a Squashfs image from a tar archive.
• Tar style handling of source pathnames in Mksquashfs.
• Cpio style handling of source pathnames in Mksquashfs.
• New option to throttle the amount of CPU and I/O.
• Mksquashfs now allows no source directory to be specified.
• New Pseudo file ‘R’ definition which allows a Regular file
  o be created with data stored within the Pseudo file.
• Symbolic links are now followed in extract files
• Unsquashfs now supports ‘exclude’ files.
• Max depth traversal option added.
• Unsquashfs can now output a ‘Pseudo file’ representing the
  input Squashfs filesystem.
• New -one-file-system option in Mksquashfs.
• New -no-hardlinks option in Mksquashfs.
• Exit code in Unsquashfs changed to distinguish between
  non-fatal errors (exit 2), and fatal errors (exit 1).
• Xattr id count added in Unsquashfs ‘-stat’ output.
• Unsquashfs ‘write outside directory’ exploit fixed.
• Error handling in Unsquashfs writer thread fixed.
• Fix failure to truncate destination if appending aborted.
• Prevent Mksquashfs reading the destination file.