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AppArmor: Update dfa matching routines.

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Update aa_dfa_match so that it doesn't result in an input string being
walked twice (once to get its length and another time to match)

Add a single step functions
  aa_dfa_next

Signed-off-by: John Johansen <john.johansen@canonical.com>
Acked-by: Kees Cook <kees@ubuntu.com>
This commit is contained in:
John Johansen
2012-02-16 06:20:26 -08:00
parent 3372b68a3c
commit 0fe1212d05
3 changed files with 81 additions and 4 deletions
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3
security/apparmor/include/match.h
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@@ -116,6 +116,9 @@ unsigned int aa_dfa_match_len(struct aa_dfa *dfa, unsigned int start,
const char *str, int len);
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);
void aa_dfa_free_kref(struct kref *kref);
/**