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audit: validate comparison operations, store them in sane form

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Don't store the field->op in the messy (and very inconvenient for e.g.
audit_comparator()) form; translate to dense set of values and do full
validation of userland-submitted value while we are at it.

->audit_init_rule() and ->audit_match_rule() get new values now; in-tree
instances updated.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2008-12-16 05:59:26 -05:00
parent 36c4f1b18c
commit 5af75d8d58
5 changed files with 94 additions and 84 deletions
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2
kernel/audit_tree.c
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@ -618,7 +618,7 @@ int audit_make_tree(struct audit_krule *rule, char *pathname, u32 op)
if (pathname[0] != '/' ||
rule->listnr != AUDIT_FILTER_EXIT ||
op & ~AUDIT_EQUAL ||
op != Audit_equal ||
rule->inode_f || rule->watch || rule->tree)
return -EINVAL;
rule->tree = alloc_tree(pathname);