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audit: link denied should not directly generate PATH record

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Audit link denied events generate duplicate PATH records which disagree
in different ways from symlink and hardlink denials.
audit_log_link_denied() should not directly generate PATH records.

See: https://github.com/linux-audit/audit-kernel/issues/21

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Richard Guy Briggs 2018-02-14 11:18:22 -05:00 committed by Paul Moore
parent 15564ff0a1
commit 45b578fe4c
1 changed files with 1 additions and 13 deletions
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14
kernel/audit.c
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@ -2313,31 +2313,19 @@ EXPORT_SYMBOL(audit_log_task_info);
void audit_log_link_denied(const char *operation, const struct path *link)
{
struct audit_buffer *ab;
struct audit_names *name;
if (!audit_enabled || audit_dummy_context())
return;
name = kzalloc(sizeof(*name), GFP_NOFS);
if (!name)
return;
/* Generate AUDIT_ANOM_LINK with subject, operation, outcome. */
ab = audit_log_start(current->audit_context, GFP_KERNEL,
AUDIT_ANOM_LINK);
if (!ab)
goto out;
return;
audit_log_format(ab, "op=%s", operation);
audit_log_task_info(ab, current);
audit_log_format(ab, " res=0");
audit_log_end(ab);
/* Generate AUDIT_PATH record with object. */
name->type = AUDIT_TYPE_NORMAL;
audit_copy_inode(name, link->dentry, d_backing_inode(link->dentry));
audit_log_name(current->audit_context, name, link, 0, NULL);
out:
kfree(name);
}
/**