Merge tag 'apparmor-pr-2018-04-10' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor

Pull apparmor updates from John Johansen:
 "Features:
  - add base infrastructure for socket mediation. ABI bump and
    additional checks to ensure only v8 compliant policy uses socket af
    mediation.
  - improve and cleanup dfa verification
  - improve profile attachment logic
     - improve overlapping expression handling
     - add the xattr matching to the attachment logic
  - improve signal mediation handling with stacked labels
  - improve handling of no_new_privs in a label stack

  Cleanups and changes:
  - use dfa to parse string split
  - bounded version of label_parse
  - proper line wrap nulldfa.in
  - split context out into task and cred naming to better match usage
  - simplify code in aafs

  Bug fixes:
  - fix display of .ns_name for containers
  - fix resource audit messages when auditing peer
  - fix logging of the existence test for signals
  - fix resource audit messages when auditing peer
  - fix display of .ns_name for containers
  - fix an error code in verify_table_headers()
  - fix memory leak on buffer on error exit path
  - fix error returns checks by making size a ssize_t"

* tag 'apparmor-pr-2018-04-10' of git://git.kernel.org/pub/scm/linux/kernel/git/jj/linux-apparmor: (36 commits)
  apparmor: fix memory leak on buffer on error exit path
  apparmor: fix dangling symlinks to policy rawdata after replacement
  apparmor: Fix an error code in verify_table_headers()
  apparmor: fix error returns checks by making size a ssize_t
  apparmor: update MAINTAINERS file git and wiki locations
  apparmor: remove POLICY_MEDIATES_SAFE
  apparmor: add base infastructure for socket mediation
  apparmor: improve overlapping domain attachment resolution
  apparmor: convert attaching profiles via xattrs to use dfa matching
  apparmor: Add support for attaching profiles via xattr, presence and value
  apparmor: cleanup: simplify code to get ns symlink name
  apparmor: cleanup create_aafs() error path
  apparmor: dfa split verification of table headers
  apparmor: dfa add support for state differential encoding
  apparmor: dfa move character match into a macro
  apparmor: update domain transitions that are subsets of confinement at nnp
  apparmor: move context.h to cred.h
  apparmor: move task related defines and fns to task.X files
  apparmor: cleanup, drop unused fn __aa_task_is_confined()
  apparmor: cleanup fixup description of aa_replace_profiles
  ...

1 files changed, 28 insertions, 0 deletions

diff --git a/security/apparmor/include/match.h b/security/apparmor/include/match.h
index add4c6726558..958d2b52a7b7 100644
--- a/security/apparmor/include/match.h
+++ b/security/apparmor/include/match.h
@@ -40,6 +40,7 @@
  */
 
 #define YYTH_MAGIC	0x1B5E783D
+#define YYTH_FLAG_DIFF_ENCODE	1
 
 struct table_set_header {
 	u32 th_magic;		/* YYTH_MAGIC */
@@ -101,6 +102,7 @@ struct aa_dfa {
 };
 
 extern struct aa_dfa *nulldfa;
+extern struct aa_dfa *stacksplitdfa;
 
 #define byte_to_byte(X) (X)
 
@@ -129,9 +131,32 @@ unsigned int aa_dfa_match(struct aa_dfa *dfa, unsigned int start,
 			  const char *str);
 unsigned int aa_dfa_next(struct aa_dfa *dfa, unsigned int state,
 			 const char c);
+unsigned int aa_dfa_match_until(struct aa_dfa *dfa, unsigned int start,
+				const char *str, const char **retpos);
+unsigned int aa_dfa_matchn_until(struct aa_dfa *dfa, unsigned int start,
+				 const char *str, int n, const char **retpos);
 
 void aa_dfa_free_kref(struct kref *kref);
 
+#define WB_HISTORY_SIZE 8
+struct match_workbuf {
+	unsigned int count;
+	unsigned int pos;
+	unsigned int len;
+	unsigned int size;	/* power of 2, same as history size */
+	unsigned int history[WB_HISTORY_SIZE];
+};
+#define DEFINE_MATCH_WB(N)		\
+struct match_workbuf N = {		\
+	.count = 0,			\
+	.pos = 0,			\
+	.len = 0,			\
+	.size = WB_HISTORY_SIZE,			\
+}
+
+unsigned int aa_dfa_leftmatch(struct aa_dfa *dfa, unsigned int start,
+			      const char *str, unsigned int *count);
+
 /**
  * aa_get_dfa - increment refcount on dfa @p
  * @dfa: dfa  (MAYBE NULL)
@@ -159,4 +184,7 @@ static inline void aa_put_dfa(struct aa_dfa *dfa)
 		kref_put(&dfa->count, aa_dfa_free_kref);
 }
 
+#define MATCH_FLAG_DIFF_ENCODE 0x80000000
+#define MARK_DIFF_ENCODE 0x40000000
+
 #endif /* __AA_MATCH_H */