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Commit 833fc48d authored by Richard Guy Briggs's avatar Richard Guy Briggs Committed by Paul Moore
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audit: skip sessionid sentinel value when auto-incrementing 



The value (unsigned int)-1 is used as a sentinel to indicate the
sessionID is unset.  Skip this value when the session_id value wraps.

Signed-off-by: default avatarRichard Guy Briggs <rgb@redhat.com>
Signed-off-by: default avatarPaul Moore <paul@paul-moore.com>
parent 8443075e

kernel/auditsc.c

+4 −1
Original line number Diff line number Diff line
@@ -2025,8 +2025,11 @@ int audit_set_loginuid(kuid_t loginuid) 
		goto out;



	/* are we setting or clearing? */

	if (uid_valid(loginuid))

	if (uid_valid(loginuid)) {

		sessionid = (unsigned int)atomic_inc_return(&session_id);

		if (unlikely(sessionid == (unsigned int)-1))

			sessionid = (unsigned int)atomic_inc_return(&session_id);

	}



	task->sessionid = sessionid;

	task->loginuid = loginuid;