[PATCH 00/19] smack: clean up xattr handling

[Konstantin Andreev <andreev@swemel.ru>]

A set of minor bug fixes and optimizations in Smack xattr handling.
Logically independent, but with the code dependencies.

The patch set applies on top of:
https://github.com/cschaufler/smack-next/commits/next
commit 6ddd169d0288

Konstantin Andreev (19):
  smack: fix bug: changing Smack xattrs requires cap_sys_admin
  smack: fix bug: changing Smack xattrs requires cap_mac_override
  smack: fix bug: setting label-containing xattrs silently ignores input garbage
  smack: stop polling other LSMs & VFS to getxattr() unsupported SMACK64IPIN/OUT
  smack: restrict getxattr() SMACK64TRANSMUTE to directories
  smack: fix bug: getxattr() returns invalid SMACK64EXEC/MMAP
  smack: deduplicate task label validation
  smack: smack_inode_setsecurity: prevent setting SMACK64EXEC/MMAP in other LSMs
  smack: smack_inode_setsecurity: prevent setting SMACK64IPIN/OUT in other LSMs
  smack: fix bug: smack_inode_setsecurity() imports alien xattrs as labels
  smack: fix bug: smack_inode_setsecurity() false EINVAL for alien xattrs
  smack: restrict setxattr() SMACK64IPIN/IPOUT to sockets
  smack: restrict setxattr() SMACK64EXEC/MMAP to regular files
  smack: return EOPNOTSUPP for setxattr() unsupported SMACK64(TRANSMUTE)
  smack: smack_inode_setsecurity(): skip checks for SMACK64TRANSMUTE
  smack: smack_inode_notifysecctx(): reject invalid labels
  smack: smack_inode_post_setxattr(): find label instead of import
  smack: smack_inode_setsecurity(): find label instead of import
  smack: deduplicate strcmp(name, XATTR_{,NAME_}SMACK*)

 Documentation/admin-guide/LSM/Smack.rst |   3 +-
 security/smack/smack.h                  |   2 +
 security/smack/smack_access.c           |  22 +-
 security/smack/smack_lsm.c              | 492 +++++++++++++++---------
 4 files changed, 324 insertions(+), 195 deletions(-)

-- 
2.43.0