From d25830e5507f6bc815f5dd7e2eb65f172e878a2b Mon Sep 17 00:00:00 2001 From: Paul Moore Date: Wed, 3 Dec 2008 00:37:04 -0800 Subject: [PATCH] netlabel: Fix a potential NULL pointer dereference Fix a potential NULL pointer dereference seen when trying to remove a static label configuration with an invalid address/mask combination. Signed-off-by: Paul Moore Signed-off-by: David S. Miller --- net/netlabel/netlabel_unlabeled.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/net/netlabel/netlabel_unlabeled.c b/net/netlabel/netlabel_unlabeled.c index e8a5c32b0f10..90c8506a0aac 100644 --- a/net/netlabel/netlabel_unlabeled.c +++ b/net/netlabel/netlabel_unlabeled.c @@ -574,9 +574,10 @@ static int netlbl_unlhsh_remove_addr4(struct net *net, list_entry = netlbl_af4list_remove(addr->s_addr, mask->s_addr, &iface->addr4_list); spin_unlock(&netlbl_unlhsh_lock); - if (list_entry == NULL) + if (list_entry != NULL) + entry = netlbl_unlhsh_addr4_entry(list_entry); + else ret_val = -ENOENT; - entry = netlbl_unlhsh_addr4_entry(list_entry); audit_buf = netlbl_audit_start_common(AUDIT_MAC_UNLBL_STCDEL, audit_info); @@ -634,9 +635,10 @@ static int netlbl_unlhsh_remove_addr6(struct net *net, spin_lock(&netlbl_unlhsh_lock); list_entry = netlbl_af6list_remove(addr, mask, &iface->addr6_list); spin_unlock(&netlbl_unlhsh_lock); - if (list_entry == NULL) + if (list_entry != NULL) + entry = netlbl_unlhsh_addr6_entry(list_entry); + else ret_val = -ENOENT; - entry = netlbl_unlhsh_addr6_entry(list_entry); audit_buf = netlbl_audit_start_common(AUDIT_MAC_UNLBL_STCDEL, audit_info); -- 2.20.1