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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 <paul.moore@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paul Moore 2008-12-03 00:37:04 -08:00 committed by David S. Miller
parent efba01803c
commit d25830e550
1 changed files with 6 additions and 4 deletions
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10
net/netlabel/netlabel_unlabeled.c
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@ -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);