linux-kernel - [PATCH] SELinux: Fix double free in selinux_netlbl_sock

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Message-ID: <20080129022026.7930.18782.stgit@flek.lan>
Date:	Mon, 28 Jan 2008 21:20:26 -0500
From:	Paul Moore <paul.moore@...com>
To:	linux-kernel@...r.kernel.org
Cc:	netdev@...r.kernel.org, selinux@...ho.nsa.gov, stable@...nel.org,
	bunk@...nel.org, jmorris@...ei.org
Subject: [PATCH] SELinux: Fix double free in selinux_netlbl_sock_setsid()

As pointed out by Adrian Bunk, commit 45c950e0f839fded922ebc0bfd59b1081cc71b70
caused a double-free when security_netlbl_sid_to_secattr() fails.  This patch
fixes this by removing the netlbl_secattr_destroy() call from that function
since we are already releasing the secattr memory in
selinux_netlbl_sock_setsid().

Signed-off-by: Paul Moore <paul.moore@...com>
---

 security/selinux/ss/services.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/security/selinux/ss/services.c b/security/selinux/ss/services.c
index 4bf715d..3a16aba 100644
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
@@ -2629,7 +2629,6 @@ int security_netlbl_sid_to_secattr(u32 sid, struct netlbl_lsm_secattr *secattr)
 
 netlbl_sid_to_secattr_failure:
 	POLICY_RDUNLOCK;
-	netlbl_secattr_destroy(secattr);
 	return rc;
 }
 #endif /* CONFIG_NETLABEL */

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