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| author | Eric Paris <eparis@redhat.com> | 2012-01-03 14:23:08 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-01-17 16:17:01 -0500 |
| commit | 02d86a568c6d2d335256864451ac8ce781bc5652 (patch) | |
| tree | 3ef085bd96cc79733cff28993379dbbd4b855813 /kernel/auditfilter.c | |
| parent | 29ef73b7a823b77a7cd0bdd7d7cded3fb6c2587b (diff) | |
| download | linux-02d86a568c6d2d335256864451ac8ce781bc5652.tar.gz linux-02d86a568c6d2d335256864451ac8ce781bc5652.tar.bz2 linux-02d86a568c6d2d335256864451ac8ce781bc5652.zip | |
audit: allow interfield comparison in audit rules
We wish to be able to audit when a uid=500 task accesses a file which is
uid=0. Or vice versa. This patch introduces a new audit filter type
AUDIT_FIELD_COMPARE which takes as an 'enum' which indicates which fields
should be compared. At this point we only define the task->uid vs
inode->uid, but other comparisons can be added.
Signed-off-by: Eric Paris <eparis@redhat.com>
Diffstat (limited to 'kernel/auditfilter.c')
| -rw-r--r-- | kernel/auditfilter.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/kernel/auditfilter.c b/kernel/auditfilter.c index f10605c787e6..a6c3f1abd206 100644 --- a/kernel/auditfilter.c +++ b/kernel/auditfilter.c @@ -526,7 +526,6 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data, goto exit_free; break; case AUDIT_FILTERKEY: - err = -EINVAL; if (entry->rule.filterkey || f->val > AUDIT_MAX_KEY_LEN) goto exit_free; str = audit_unpack_string(&bufp, &remain, f->val); @@ -543,6 +542,10 @@ static struct audit_entry *audit_data_to_entry(struct audit_rule_data *data, if (f->val & ~S_IFMT) goto exit_free; break; + case AUDIT_FIELD_COMPARE: + if (f->val > AUDIT_MAX_FIELD_COMPARE) + goto exit_free; + break; default: goto exit_free; } |